[RESEND,v6,5/5] spmi: pmic-arb: Add multi bus support

Starting with HW version 7, there are actually two separate buses
(with two separate sets of wires). So in order to support both
buses, we need to register a separate spmi controller for each one.
Add a separate compatible for v7 only, but allow the legacy platforms
that have v7 to still work with the old one, for DT backwards
compatibility.

Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
---
 drivers/spmi/spmi-pmic-arb.c | 726 +++++++++++++++++++++++++------------------
 1 file changed, 429 insertions(+), 297 deletions(-)

Hi Abel,

On 26/03/2024 17:28, Abel Vesa wrote:
> Starting with HW version 7, there are actually two separate buses
> (with two separate sets of wires). So in order to support both
> buses, we need to register a separate spmi controller for each one.
> Add a separate compatible for v7 only, but allow the legacy platforms
> that have v7 to still work with the old one, for DT backwards
> compatibility.
> 
> Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
> ---
>   drivers/spmi/spmi-pmic-arb.c | 726 +++++++++++++++++++++++++------------------
>   1 file changed, 429 insertions(+), 297 deletions(-)
> 
> diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
> index 188252bfb95f..ca0f42952445 100644
> --- a/drivers/spmi/spmi-pmic-arb.c
> +++ b/drivers/spmi/spmi-pmic-arb.c
> @@ -13,6 +13,8 @@
>   #include <linux/kernel.h>
>   #include <linux/module.h>
>   #include <linux/of.h>
> +#include <linux/of_address.h>
> +#include <linux/of_irq.h>
>   #include <linux/platform_device.h>
>   #include <linux/slab.h>
>   #include <linux/spmi.h>
> @@ -94,6 +96,8 @@ enum pmic_arb_channel {
>   	PMIC_ARB_CHANNEL_OBS,
>   };
>   
> +#define PMIC_ARB_MAX_BUSES		2
> +
>   /* Maximum number of support PMIC peripherals */
>   #define PMIC_ARB_MAX_PERIPHS		512
>   #define PMIC_ARB_MAX_PERIPHS_V7		1024
> @@ -125,58 +129,68 @@ struct apid_data {
>   	u8		irq_ee;
>   };
>   
> +struct spmi_pmic_arb;
> +
>   /**
> - * struct spmi_pmic_arb - SPMI PMIC Arbiter object
> + * struct spmi_pmic_arb_bus - SPMI PMIC Arbiter Bus object
>    *
> - * @rd_base:		on v1 "core", on v2 "observer" register base off DT.
> - * @wr_base:		on v1 "core", on v2 "chnls"    register base off DT.
>    * @intr:		address of the SPMI interrupt control registers.
>    * @cnfg:		address of the PMIC Arbiter configuration registers.
> - * @lock:		lock to synchronize accesses.
> - * @channel:		execution environment channel to use for accesses.
> - * @irq:		PMIC ARB interrupt.
> - * @ee:			the current Execution Environment
> - * @bus_instance:	on v7: 0 = primary SPMI bus, 1 = secondary SPMI bus
> - * @min_apid:		minimum APID (used for bounding IRQ search)
> - * @max_apid:		maximum APID
> + * @domain:		irq domain object for PMIC IRQ domain
>    * @base_apid:		on v7: minimum APID associated with the particular SPMI
>    *			bus instance
>    * @apid_count:		on v5 and v7: number of APIDs associated with the
>    *			particular SPMI bus instance
>    * @mapping_table:	in-memory copy of PPID -> APID mapping table.
> - * @domain:		irq domain object for PMIC IRQ domain
> - * @spmic:		SPMI controller object
> - * @ver_ops:		version dependent operations.
>    * @ppid_to_apid:	in-memory copy of PPID -> APID mapping table.
> - * @last_apid:		Highest value APID in use
>    * @apid_data:		Table of data for all APIDs
> + * @last_apid:		Highest value APID in use
> + * @irq:		PMIC ARB interrupt.

Those are moved for no reason, and it doesn't match anymore with the actual fields in spmi_pmic_arb_bus,
please fix.

> + */
> +struct spmi_pmic_arb_bus {
> +	struct spmi_pmic_arb	*pmic_arb;
> +	struct irq_domain	*domain;
> +	void __iomem		*intr;
> +	void __iomem		*cnfg;
> +	struct spmi_controller	*spmic;
> +	u16			base_apid;
> +	int			apid_count;
> +	u32			*mapping_table;
> +	DECLARE_BITMAP(mapping_table_valid, PMIC_ARB_MAX_PERIPHS);
> +	u16			*ppid_to_apid;
> +	u16			last_apid;
> +	struct apid_data	*apid_data;
> +	u16			min_apid;
> +	u16			max_apid;
> +	int			irq;
> +	u8			id;
> +};
> +
> +/**
> + * struct spmi_pmic_arb - SPMI PMIC Arbiter object
> + *
> + * @rd_base:		on v1 "core", on v2 "observer" register base off DT.
> + * @wr_base:		on v1 "core", on v2 "chnls"    register base off DT.
> + * @lock:		lock to synchronize accesses.
> + * @channel:		execution environment channel to use for accesses.
> + * @ee:			the current Execution Environment
> + * @min_apid:		minimum APID (used for bounding IRQ search)
> + * @max_apid:		maximum APID
> + * @ver_ops:		version dependent operations.
>    * @max_periphs:	Number of elements in apid_data[]
>    */
>   struct spmi_pmic_arb {
>   	void __iomem		*rd_base;
>   	void __iomem		*wr_base;
> -	void __iomem		*intr;
> -	void __iomem		*cnfg;
>   	void __iomem		*core;
>   	resource_size_t		core_size;
>   	raw_spinlock_t		lock;
>   	u8			channel;
> -	int			irq;
>   	u8			ee;
> -	u32			bus_instance;
> -	u16			min_apid;
> -	u16			max_apid;
> -	u16			base_apid;
> -	int			apid_count;
> -	u32			*mapping_table;
> -	DECLARE_BITMAP(mapping_table_valid, PMIC_ARB_MAX_PERIPHS);
> -	struct irq_domain	*domain;
> -	struct spmi_controller	*spmic;
>   	const struct pmic_arb_ver_ops *ver_ops;
> -	u16			*ppid_to_apid;
> -	u16			last_apid;
> -	struct apid_data	*apid_data;
>   	int			max_periphs;
> +	struct spmi_pmic_arb_bus buses[PMIC_ARB_MAX_BUSES];
> +	int			buses_available;
>   };

Same here, please refresh/resync the struct documentation

I get the following:
drivers/spmi/spmi-pmic-arb.c:167: warning: Function parameter or struct member 'pmic_arb' not described in 'spmi_pmic_arb_bus'
drivers/spmi/spmi-pmic-arb.c:167: warning: Function parameter or struct member 'spmic' not described in 'spmi_pmic_arb_bus'
drivers/spmi/spmi-pmic-arb.c:167: warning: Function parameter or struct member 'mapping_table_valid' not described in 'spmi_pmic_arb_bus'
drivers/spmi/spmi-pmic-arb.c:167: warning: Function parameter or struct member 'min_apid' not described in 'spmi_pmic_arb_bus'
drivers/spmi/spmi-pmic-arb.c:167: warning: Function parameter or struct member 'max_apid' not described in 'spmi_pmic_arb_bus'
drivers/spmi/spmi-pmic-arb.c:167: warning: Function parameter or struct member 'id' not described in 'spmi_pmic_arb_bus'
drivers/spmi/spmi-pmic-arb.c:194: warning: Function parameter or struct member 'core' not described in 'spmi_pmic_arb'
drivers/spmi/spmi-pmic-arb.c:194: warning: Function parameter or struct member 'core_size' not described in 'spmi_pmic_arb'
drivers/spmi/spmi-pmic-arb.c:194: warning: Function parameter or struct member 'buses' not described in 'spmi_pmic_arb'
drivers/spmi/spmi-pmic-arb.c:194: warning: Function parameter or struct member 'buses_available' not described in 'spmi_pmic_arb'
drivers/spmi/spmi-pmic-arb.c:194: warning: Excess struct member 'min_apid' description in 'spmi_pmic_arb'
drivers/spmi/spmi-pmic-arb.c:194: warning: Excess struct member 'max_apid' description in 'spmi_pmic_arb'
drivers/spmi/spmi-pmic-arb.c:236: warning: Function parameter or struct member 'get_core_resources' not described in 'pmic_arb_ver_ops'
drivers/spmi/spmi-pmic-arb.c:258: warning: Function parameter or struct member 'pmic_arb' not described in 'pmic_arb_read_data'
drivers/spmi/spmi-pmic-arb.c:272: warning: Function parameter or struct member 'pmic_arb' not described in 'pmic_arb_write_data'

>   
>   /**
> @@ -204,21 +218,21 @@ struct spmi_pmic_arb {
>   struct pmic_arb_ver_ops {
>   	const char *ver_str;
>   	int (*get_core_resources)(struct platform_device *pdev, void __iomem *core);
> -	int (*init_apid)(struct spmi_pmic_arb *pmic_arb, int index);
> -	int (*ppid_to_apid)(struct spmi_pmic_arb *pmic_arb, u16 ppid);
> +	int (*init_apid)(struct spmi_pmic_arb_bus *bus, int index);
> +	int (*ppid_to_apid)(struct spmi_pmic_arb_bus *bus, u16 ppid);
>   	/* spmi commands (read_cmd, write_cmd, cmd) functionality */
> -	int (*offset)(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
> -			enum pmic_arb_channel ch_type);
> +	int (*offset)(struct spmi_pmic_arb_bus *bus, u8 sid, u16 addr,
> +		      enum pmic_arb_channel ch_type);
>   	u32 (*fmt_cmd)(u8 opc, u8 sid, u16 addr, u8 bc);
>   	int (*non_data_cmd)(struct spmi_controller *ctrl, u8 opc, u8 sid);
>   	/* Interrupts controller functionality (offset of PIC registers) */
> -	void __iomem *(*owner_acc_status)(struct spmi_pmic_arb *pmic_arb, u8 m,
> +	void __iomem *(*owner_acc_status)(struct spmi_pmic_arb_bus *bus, u8 m,
>   					  u16 n);
> -	void __iomem *(*acc_enable)(struct spmi_pmic_arb *pmic_arb, u16 n);
> -	void __iomem *(*irq_status)(struct spmi_pmic_arb *pmic_arb, u16 n);
> -	void __iomem *(*irq_clear)(struct spmi_pmic_arb *pmic_arb, u16 n);
> +	void __iomem *(*acc_enable)(struct spmi_pmic_arb_bus *bus, u16 n);
> +	void __iomem *(*irq_status)(struct spmi_pmic_arb_bus *bus, u16 n);
> +	void __iomem *(*irq_clear)(struct spmi_pmic_arb_bus *bus, u16 n);
>   	u32 (*apid_map_offset)(u16 n);
> -	void __iomem *(*apid_owner)(struct spmi_pmic_arb *pmic_arb, u16 n);
> +	void __iomem *(*apid_owner)(struct spmi_pmic_arb_bus *bus, u16 n);
>   };
>   
>   static inline void pmic_arb_base_write(struct spmi_pmic_arb *pmic_arb,
> @@ -266,13 +280,14 @@ static int pmic_arb_wait_for_done(struct spmi_controller *ctrl,
>   				  void __iomem *base, u8 sid, u16 addr,
>   				  enum pmic_arb_channel ch_type)
>   {
> -	struct spmi_pmic_arb *pmic_arb = spmi_controller_get_drvdata(ctrl);
> +	struct spmi_pmic_arb_bus *bus = spmi_controller_get_drvdata(ctrl);
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	u32 status = 0;
>   	u32 timeout = PMIC_ARB_TIMEOUT_US;
>   	u32 offset;
>   	int rc;
>   
> -	rc = pmic_arb->ver_ops->offset(pmic_arb, sid, addr, ch_type);
> +	rc = pmic_arb->ver_ops->offset(bus, sid, addr, ch_type);
>   	if (rc < 0)
>   		return rc;
>   
> @@ -284,21 +299,21 @@ static int pmic_arb_wait_for_done(struct spmi_controller *ctrl,
>   
>   		if (status & PMIC_ARB_STATUS_DONE) {
>   			if (status & PMIC_ARB_STATUS_DENIED) {
> -				dev_err(&ctrl->dev, "%s: %#x %#x: transaction denied (%#x)\n",
> -					__func__, sid, addr, status);
> +				dev_err(&ctrl->dev, "%s: %#x %#x %#x: transaction denied (%#x)\n",
> +					__func__, bus->id, sid, addr, status);

Won't "dev_err(&ctrl->dev" already print the bus id ?

>   				return -EPERM;
>   			}
>   
>   			if (status & PMIC_ARB_STATUS_FAILURE) {
> -				dev_err(&ctrl->dev, "%s: %#x %#x: transaction failed (%#x)\n",
> -					__func__, sid, addr, status);
> +				dev_err(&ctrl->dev, "%s: %#x %#x %#x: transaction failed (%#x) reg: 0x%x\n",
> +					__func__, bus->id, sid, addr, status, offset);
>   				WARN_ON(1);
>   				return -EIO;
>   			}
>   
>   			if (status & PMIC_ARB_STATUS_DROPPED) {
> -				dev_err(&ctrl->dev, "%s: %#x %#x: transaction dropped (%#x)\n",
> -					__func__, sid, addr, status);
> +				dev_err(&ctrl->dev, "%s: %#x %#x %#x: transaction dropped (%#x)\n",
> +					__func__, bus->id, sid, addr, status);
>   				return -EIO;
>   			}
>   
> @@ -307,8 +322,8 @@ static int pmic_arb_wait_for_done(struct spmi_controller *ctrl,
>   		udelay(1);
>   	}
>   
> -	dev_err(&ctrl->dev, "%s: %#x %#x: timeout, status %#x\n",
> -		__func__, sid, addr, status);
> +	dev_err(&ctrl->dev, "%s: %#x %#x %#x: timeout, status %#x\n",
> +		__func__, bus->id, sid, addr, status);
>   	return -ETIMEDOUT;
>   }
>   
> @@ -316,12 +331,13 @@ static int
>   pmic_arb_non_data_cmd_v1(struct spmi_controller *ctrl, u8 opc, u8 sid)
>   {
>   	struct spmi_pmic_arb *pmic_arb = spmi_controller_get_drvdata(ctrl);
> +	struct spmi_pmic_arb_bus *bus = &pmic_arb->buses[0];
>   	unsigned long flags;
>   	u32 cmd;
>   	int rc;
>   	u32 offset;
>   
> -	rc = pmic_arb->ver_ops->offset(pmic_arb, sid, 0, PMIC_ARB_CHANNEL_RW);
> +	rc = pmic_arb->ver_ops->offset(bus, sid, 0, PMIC_ARB_CHANNEL_RW);
>   	if (rc < 0)
>   		return rc;
>   
> @@ -357,20 +373,21 @@ static int pmic_arb_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid)
>   	return pmic_arb->ver_ops->non_data_cmd(ctrl, opc, sid);
>   }
>   
> -static int pmic_arb_fmt_read_cmd(struct spmi_pmic_arb *pmic_arb, u8 opc, u8 sid,
> +static int pmic_arb_fmt_read_cmd(struct spmi_pmic_arb_bus *bus, u8 opc, u8 sid,
>   				 u16 addr, size_t len, u32 *cmd, u32 *offset)
>   {
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	u8 bc = len - 1;
>   	int rc;
>   
> -	rc = pmic_arb->ver_ops->offset(pmic_arb, sid, addr,
> +	rc = pmic_arb->ver_ops->offset(bus, sid, addr,
>   				       PMIC_ARB_CHANNEL_OBS);
>   	if (rc < 0)
>   		return rc;
>   
>   	*offset = rc;
>   	if (bc >= PMIC_ARB_MAX_TRANS_BYTES) {
> -		dev_err(&pmic_arb->spmic->dev, "pmic-arb supports 1..%d bytes per trans, but:%zu requested",
> +		dev_err(&bus->spmic->dev, "pmic-arb supports 1..%d bytes per trans, but:%zu requested",
>   			PMIC_ARB_MAX_TRANS_BYTES, len);
>   		return  -EINVAL;
>   	}
> @@ -394,7 +411,8 @@ static int pmic_arb_read_cmd_unlocked(struct spmi_controller *ctrl, u32 cmd,
>   				      u32 offset, u8 sid, u16 addr, u8 *buf,
>   				      size_t len)
>   {
> -	struct spmi_pmic_arb *pmic_arb = spmi_controller_get_drvdata(ctrl);
> +	struct spmi_pmic_arb_bus *bus = spmi_controller_get_drvdata(ctrl);
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	u8 bc = len - 1;
>   	int rc;
>   
> @@ -416,12 +434,13 @@ static int pmic_arb_read_cmd_unlocked(struct spmi_controller *ctrl, u32 cmd,
>   static int pmic_arb_read_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
>   			     u16 addr, u8 *buf, size_t len)
>   {
> -	struct spmi_pmic_arb *pmic_arb = spmi_controller_get_drvdata(ctrl);
> +	struct spmi_pmic_arb_bus *bus = spmi_controller_get_drvdata(ctrl);
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	unsigned long flags;
>   	u32 cmd, offset;
>   	int rc;
>   
> -	rc = pmic_arb_fmt_read_cmd(pmic_arb, opc, sid, addr, len, &cmd,
> +	rc = pmic_arb_fmt_read_cmd(bus, opc, sid, addr, len, &cmd,
>   				   &offset);
>   	if (rc)
>   		return rc;
> @@ -433,21 +452,22 @@ static int pmic_arb_read_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
>   	return rc;
>   }
>   
> -static int pmic_arb_fmt_write_cmd(struct spmi_pmic_arb *pmic_arb, u8 opc,
> +static int pmic_arb_fmt_write_cmd(struct spmi_pmic_arb_bus *bus, u8 opc,
>   				  u8 sid, u16 addr, size_t len, u32 *cmd,
>   				  u32 *offset)
>   {
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	u8 bc = len - 1;
>   	int rc;
>   
> -	rc = pmic_arb->ver_ops->offset(pmic_arb, sid, addr,
> +	rc = pmic_arb->ver_ops->offset(bus, sid, addr,
>   					PMIC_ARB_CHANNEL_RW);
>   	if (rc < 0)
>   		return rc;
>   
>   	*offset = rc;
>   	if (bc >= PMIC_ARB_MAX_TRANS_BYTES) {
> -		dev_err(&pmic_arb->spmic->dev, "pmic-arb supports 1..%d bytes per trans, but:%zu requested",
> +		dev_err(&bus->spmic->dev, "pmic-arb supports 1..%d bytes per trans, but:%zu requested",
>   			PMIC_ARB_MAX_TRANS_BYTES, len);
>   		return  -EINVAL;
>   	}
> @@ -473,7 +493,8 @@ static int pmic_arb_write_cmd_unlocked(struct spmi_controller *ctrl, u32 cmd,
>   				      u32 offset, u8 sid, u16 addr,
>   				      const u8 *buf, size_t len)
>   {
> -	struct spmi_pmic_arb *pmic_arb = spmi_controller_get_drvdata(ctrl);
> +	struct spmi_pmic_arb_bus *bus = spmi_controller_get_drvdata(ctrl);
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	u8 bc = len - 1;
>   
>   	/* Write data to FIFOs */
> @@ -492,12 +513,13 @@ static int pmic_arb_write_cmd_unlocked(struct spmi_controller *ctrl, u32 cmd,
>   static int pmic_arb_write_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
>   			      u16 addr, const u8 *buf, size_t len)
>   {
> -	struct spmi_pmic_arb *pmic_arb = spmi_controller_get_drvdata(ctrl);
> +	struct spmi_pmic_arb_bus *bus = spmi_controller_get_drvdata(ctrl);
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	unsigned long flags;
>   	u32 cmd, offset;
>   	int rc;
>   
> -	rc = pmic_arb_fmt_write_cmd(pmic_arb, opc, sid, addr, len, &cmd,
> +	rc = pmic_arb_fmt_write_cmd(bus, opc, sid, addr, len, &cmd,
>   				    &offset);
>   	if (rc)
>   		return rc;
> @@ -513,18 +535,19 @@ static int pmic_arb_write_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
>   static int pmic_arb_masked_write(struct spmi_controller *ctrl, u8 sid, u16 addr,
>   				 const u8 *buf, const u8 *mask, size_t len)
>   {
> -	struct spmi_pmic_arb *pmic_arb = spmi_controller_get_drvdata(ctrl);
> +	struct spmi_pmic_arb_bus *bus = spmi_controller_get_drvdata(ctrl);
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	u32 read_cmd, read_offset, write_cmd, write_offset;
>   	u8 temp[PMIC_ARB_MAX_TRANS_BYTES];
>   	unsigned long flags;
>   	int rc, i;
>   
> -	rc = pmic_arb_fmt_read_cmd(pmic_arb, SPMI_CMD_EXT_READL, sid, addr, len,
> +	rc = pmic_arb_fmt_read_cmd(bus, SPMI_CMD_EXT_READL, sid, addr, len,
>   				   &read_cmd, &read_offset);
>   	if (rc)
>   		return rc;
>   
> -	rc = pmic_arb_fmt_write_cmd(pmic_arb, SPMI_CMD_EXT_WRITEL, sid, addr,
> +	rc = pmic_arb_fmt_write_cmd(bus, SPMI_CMD_EXT_WRITEL, sid, addr,
>   				    len, &write_cmd, &write_offset);
>   	if (rc)
>   		return rc;
> @@ -567,25 +590,25 @@ struct spmi_pmic_arb_qpnpint_type {
>   static void qpnpint_spmi_write(struct irq_data *d, u8 reg, void *buf,
>   			       size_t len)
>   {
> -	struct spmi_pmic_arb *pmic_arb = irq_data_get_irq_chip_data(d);
> +	struct spmi_pmic_arb_bus *bus = irq_data_get_irq_chip_data(d);
>   	u8 sid = hwirq_to_sid(d->hwirq);
>   	u8 per = hwirq_to_per(d->hwirq);
>   
> -	if (pmic_arb_write_cmd(pmic_arb->spmic, SPMI_CMD_EXT_WRITEL, sid,
> +	if (pmic_arb_write_cmd(bus->spmic, SPMI_CMD_EXT_WRITEL, sid,
>   			       (per << 8) + reg, buf, len))
> -		dev_err_ratelimited(&pmic_arb->spmic->dev, "failed irqchip transaction on %x\n",
> +		dev_err_ratelimited(&bus->spmic->dev, "failed irqchip transaction on %x\n",
>   				    d->irq);
>   }
>   
>   static void qpnpint_spmi_read(struct irq_data *d, u8 reg, void *buf, size_t len)
>   {
> -	struct spmi_pmic_arb *pmic_arb = irq_data_get_irq_chip_data(d);
> +	struct spmi_pmic_arb_bus *bus = irq_data_get_irq_chip_data(d);
>   	u8 sid = hwirq_to_sid(d->hwirq);
>   	u8 per = hwirq_to_per(d->hwirq);
>   
> -	if (pmic_arb_read_cmd(pmic_arb->spmic, SPMI_CMD_EXT_READL, sid,
> +	if (pmic_arb_read_cmd(bus->spmic, SPMI_CMD_EXT_READL, sid,
>   			      (per << 8) + reg, buf, len))
> -		dev_err_ratelimited(&pmic_arb->spmic->dev, "failed irqchip transaction on %x\n",
> +		dev_err_ratelimited(&bus->spmic->dev, "failed irqchip transaction on %x\n",
>   				    d->irq);
>   }
>   
> @@ -593,47 +616,49 @@ static int qpnpint_spmi_masked_write(struct irq_data *d, u8 reg,
>   				     const void *buf, const void *mask,
>   				     size_t len)
>   {
> -	struct spmi_pmic_arb *pmic_arb = irq_data_get_irq_chip_data(d);
> +	struct spmi_pmic_arb_bus *bus = irq_data_get_irq_chip_data(d);
>   	u8 sid = hwirq_to_sid(d->hwirq);
>   	u8 per = hwirq_to_per(d->hwirq);
>   	int rc;
>   
> -	rc = pmic_arb_masked_write(pmic_arb->spmic, sid, (per << 8) + reg, buf,
> +	rc = pmic_arb_masked_write(bus->spmic, sid, (per << 8) + reg, buf,
>   				   mask, len);
>   	if (rc)
> -		dev_err_ratelimited(&pmic_arb->spmic->dev, "failed irqchip transaction on %x rc=%d\n",
> +		dev_err_ratelimited(&bus->spmic->dev, "failed irqchip transaction on %x rc=%d\n",
>   				    d->irq, rc);
>   	return rc;
>   }
>   
> -static void cleanup_irq(struct spmi_pmic_arb *pmic_arb, u16 apid, int id)
> +static void cleanup_irq(struct spmi_pmic_arb_bus *bus, u16 apid, int id)
>   {
> -	u16 ppid = pmic_arb->apid_data[apid].ppid;
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
> +	u16 ppid = bus->apid_data[apid].ppid;
>   	u8 sid = ppid >> 8;
>   	u8 per = ppid & 0xFF;
>   	u8 irq_mask = BIT(id);
>   
> -	dev_err_ratelimited(&pmic_arb->spmic->dev, "%s apid=%d sid=0x%x per=0x%x irq=%d\n",
> -			__func__, apid, sid, per, id);
> -	writel_relaxed(irq_mask, pmic_arb->ver_ops->irq_clear(pmic_arb, apid));
> +	dev_err_ratelimited(&bus->spmic->dev, "%s apid=%d sid=0x%x per=0x%x irq=%d\n",
> +			    __func__, apid, sid, per, id);
> +	writel_relaxed(irq_mask, pmic_arb->ver_ops->irq_clear(bus, apid));
>   }
>   
> -static int periph_interrupt(struct spmi_pmic_arb *pmic_arb, u16 apid)
> +static int periph_interrupt(struct spmi_pmic_arb_bus *bus, u16 apid)
>   {
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	unsigned int irq;
>   	u32 status, id;
>   	int handled = 0;
> -	u8 sid = (pmic_arb->apid_data[apid].ppid >> 8) & 0xF;
> -	u8 per = pmic_arb->apid_data[apid].ppid & 0xFF;
> +	u8 sid = (bus->apid_data[apid].ppid >> 8) & 0xF;
> +	u8 per = bus->apid_data[apid].ppid & 0xFF;
>   
> -	status = readl_relaxed(pmic_arb->ver_ops->irq_status(pmic_arb, apid));
> +	status = readl_relaxed(pmic_arb->ver_ops->irq_status(bus, apid));
>   	while (status) {
>   		id = ffs(status) - 1;
>   		status &= ~BIT(id);
> -		irq = irq_find_mapping(pmic_arb->domain,
> -					spec_to_hwirq(sid, per, id, apid));
> +		irq = irq_find_mapping(bus->domain,
> +				       spec_to_hwirq(sid, per, id, apid));
>   		if (irq == 0) {
> -			cleanup_irq(pmic_arb, apid, id);
> +			cleanup_irq(bus, apid, id);
>   			continue;
>   		}
>   		generic_handle_irq(irq);
> @@ -645,16 +670,17 @@ static int periph_interrupt(struct spmi_pmic_arb *pmic_arb, u16 apid)
>   
>   static void pmic_arb_chained_irq(struct irq_desc *desc)
>   {
> -	struct spmi_pmic_arb *pmic_arb = irq_desc_get_handler_data(desc);
> +	struct spmi_pmic_arb_bus *bus = irq_desc_get_handler_data(desc);
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	const struct pmic_arb_ver_ops *ver_ops = pmic_arb->ver_ops;
>   	struct irq_chip *chip = irq_desc_get_chip(desc);
> -	int first = pmic_arb->min_apid;
> -	int last = pmic_arb->max_apid;
> +	int first = bus->min_apid;
> +	int last = bus->max_apid;
>   	/*
>   	 * acc_offset will be non-zero for the secondary SPMI bus instance on
>   	 * v7 controllers.
>   	 */
> -	int acc_offset = pmic_arb->base_apid >> 5;
> +	int acc_offset = bus->base_apid >> 5;
>   	u8 ee = pmic_arb->ee;
>   	u32 status, enable, handled = 0;
>   	int i, id, apid;
> @@ -665,7 +691,7 @@ static void pmic_arb_chained_irq(struct irq_desc *desc)
>   	chained_irq_enter(chip, desc);
>   
>   	for (i = first >> 5; i <= last >> 5; ++i) {
> -		status = readl_relaxed(ver_ops->owner_acc_status(pmic_arb, ee, i - acc_offset));
> +		status = readl_relaxed(ver_ops->owner_acc_status(bus, ee, i - acc_offset));
>   		if (status)
>   			acc_valid = true;
>   
> @@ -679,9 +705,9 @@ static void pmic_arb_chained_irq(struct irq_desc *desc)
>   				continue;
>   			}
>   			enable = readl_relaxed(
> -					ver_ops->acc_enable(pmic_arb, apid));
> +					ver_ops->acc_enable(bus, apid));
>   			if (enable & SPMI_PIC_ACC_ENABLE_BIT)
> -				if (periph_interrupt(pmic_arb, apid) != 0)
> +				if (periph_interrupt(bus, apid) != 0)
>   					handled++;
>   		}
>   	}
> @@ -690,19 +716,19 @@ static void pmic_arb_chained_irq(struct irq_desc *desc)
>   	if (!acc_valid) {
>   		for (i = first; i <= last; i++) {
>   			/* skip if APPS is not irq owner */
> -			if (pmic_arb->apid_data[i].irq_ee != pmic_arb->ee)
> +			if (bus->apid_data[i].irq_ee != pmic_arb->ee)
>   				continue;
>   
>   			irq_status = readl_relaxed(
> -					     ver_ops->irq_status(pmic_arb, i));
> +					     ver_ops->irq_status(bus, i));
>   			if (irq_status) {
>   				enable = readl_relaxed(
> -					     ver_ops->acc_enable(pmic_arb, i));
> +					     ver_ops->acc_enable(bus, i));
>   				if (enable & SPMI_PIC_ACC_ENABLE_BIT) {
> -					dev_dbg(&pmic_arb->spmic->dev,
> +					dev_dbg(&bus->spmic->dev,
>   						"Dispatching IRQ for apid=%d status=%x\n",
>   						i, irq_status);
> -					if (periph_interrupt(pmic_arb, i) != 0)
> +					if (periph_interrupt(bus, i) != 0)
>   						handled++;
>   				}
>   			}
> @@ -717,12 +743,13 @@ static void pmic_arb_chained_irq(struct irq_desc *desc)
>   
>   static void qpnpint_irq_ack(struct irq_data *d)
>   {
> -	struct spmi_pmic_arb *pmic_arb = irq_data_get_irq_chip_data(d);
> +	struct spmi_pmic_arb_bus *bus = irq_data_get_irq_chip_data(d);
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	u8 irq = hwirq_to_irq(d->hwirq);
>   	u16 apid = hwirq_to_apid(d->hwirq);
>   	u8 data;
>   
> -	writel_relaxed(BIT(irq), pmic_arb->ver_ops->irq_clear(pmic_arb, apid));
> +	writel_relaxed(BIT(irq), pmic_arb->ver_ops->irq_clear(bus, apid));
>   
>   	data = BIT(irq);
>   	qpnpint_spmi_write(d, QPNPINT_REG_LATCHED_CLR, &data, 1);
> @@ -738,14 +765,15 @@ static void qpnpint_irq_mask(struct irq_data *d)
>   
>   static void qpnpint_irq_unmask(struct irq_data *d)
>   {
> -	struct spmi_pmic_arb *pmic_arb = irq_data_get_irq_chip_data(d);
> +	struct spmi_pmic_arb_bus *bus = irq_data_get_irq_chip_data(d);
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	const struct pmic_arb_ver_ops *ver_ops = pmic_arb->ver_ops;
>   	u8 irq = hwirq_to_irq(d->hwirq);
>   	u16 apid = hwirq_to_apid(d->hwirq);
>   	u8 buf[2];
>   
>   	writel_relaxed(SPMI_PIC_ACC_ENABLE_BIT,
> -			ver_ops->acc_enable(pmic_arb, apid));
> +			ver_ops->acc_enable(bus, apid));
>   
>   	qpnpint_spmi_read(d, QPNPINT_REG_EN_SET, &buf[0], 1);
>   	if (!(buf[0] & BIT(irq))) {
> @@ -802,9 +830,9 @@ static int qpnpint_irq_set_type(struct irq_data *d, unsigned int flow_type)
>   
>   static int qpnpint_irq_set_wake(struct irq_data *d, unsigned int on)
>   {
> -	struct spmi_pmic_arb *pmic_arb = irq_data_get_irq_chip_data(d);
> +	struct spmi_pmic_arb_bus *bus = irq_data_get_irq_chip_data(d);
>   
> -	return irq_set_irq_wake(pmic_arb->irq, on);
> +	return irq_set_irq_wake(bus->irq, on);
>   }
>   
>   static int qpnpint_get_irqchip_state(struct irq_data *d,
> @@ -826,17 +854,18 @@ static int qpnpint_get_irqchip_state(struct irq_data *d,
>   static int qpnpint_irq_domain_activate(struct irq_domain *domain,
>   				       struct irq_data *d, bool reserve)
>   {
> -	struct spmi_pmic_arb *pmic_arb = irq_data_get_irq_chip_data(d);
> +	struct spmi_pmic_arb_bus *bus = irq_data_get_irq_chip_data(d);
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	u16 periph = hwirq_to_per(d->hwirq);
>   	u16 apid = hwirq_to_apid(d->hwirq);
>   	u16 sid = hwirq_to_sid(d->hwirq);
>   	u16 irq = hwirq_to_irq(d->hwirq);
>   	u8 buf;
>   
> -	if (pmic_arb->apid_data[apid].irq_ee != pmic_arb->ee) {
> -		dev_err(&pmic_arb->spmic->dev, "failed to xlate sid = %#x, periph = %#x, irq = %u: ee=%u but owner=%u\n",
> +	if (bus->apid_data[apid].irq_ee != pmic_arb->ee) {
> +		dev_err(&bus->spmic->dev, "failed to xlate sid = %#x, periph = %#x, irq = %u: ee=%u but owner=%u\n",
>   			sid, periph, irq, pmic_arb->ee,
> -			pmic_arb->apid_data[apid].irq_ee);
> +			bus->apid_data[apid].irq_ee);
>   		return -ENODEV;
>   	}
>   
> @@ -863,15 +892,16 @@ static int qpnpint_irq_domain_translate(struct irq_domain *d,
>   					unsigned long *out_hwirq,
>   					unsigned int *out_type)
>   {
> -	struct spmi_pmic_arb *pmic_arb = d->host_data;
> +	struct spmi_pmic_arb_bus *bus = d->host_data;
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	u32 *intspec = fwspec->param;
>   	u16 apid, ppid;
>   	int rc;
>   
> -	dev_dbg(&pmic_arb->spmic->dev, "intspec[0] 0x%1x intspec[1] 0x%02x intspec[2] 0x%02x\n",
> +	dev_dbg(&bus->spmic->dev, "intspec[0] 0x%1x intspec[1] 0x%02x intspec[2] 0x%02x\n",
>   		intspec[0], intspec[1], intspec[2]);
>   
> -	if (irq_domain_get_of_node(d) != pmic_arb->spmic->dev.of_node)
> +	if (irq_domain_get_of_node(d) != bus->spmic->dev.of_node)
>   		return -EINVAL;
>   	if (fwspec->param_count != 4)
>   		return -EINVAL;
> @@ -879,37 +909,38 @@ static int qpnpint_irq_domain_translate(struct irq_domain *d,
>   		return -EINVAL;
>   
>   	ppid = intspec[0] << 8 | intspec[1];
> -	rc = pmic_arb->ver_ops->ppid_to_apid(pmic_arb, ppid);
> +	rc = pmic_arb->ver_ops->ppid_to_apid(bus, ppid);
>   	if (rc < 0) {
> -		dev_err(&pmic_arb->spmic->dev, "failed to xlate sid = %#x, periph = %#x, irq = %u rc = %d\n",
> -		intspec[0], intspec[1], intspec[2], rc);
> +		dev_err(&bus->spmic->dev, "failed to xlate sid = %#x, periph = %#x, irq = %u rc = %d\n",
> +			intspec[0], intspec[1], intspec[2], rc);
>   		return rc;
>   	}
>   
>   	apid = rc;
>   	/* Keep track of {max,min}_apid for bounding search during interrupt */
> -	if (apid > pmic_arb->max_apid)
> -		pmic_arb->max_apid = apid;
> -	if (apid < pmic_arb->min_apid)
> -		pmic_arb->min_apid = apid;
> +	if (apid > bus->max_apid)
> +		bus->max_apid = apid;
> +	if (apid < bus->min_apid)
> +		bus->min_apid = apid;
>   
>   	*out_hwirq = spec_to_hwirq(intspec[0], intspec[1], intspec[2], apid);
>   	*out_type  = intspec[3] & IRQ_TYPE_SENSE_MASK;
>   
> -	dev_dbg(&pmic_arb->spmic->dev, "out_hwirq = %lu\n", *out_hwirq);
> +	dev_dbg(&bus->spmic->dev, "out_hwirq = %lu\n", *out_hwirq);
>   
>   	return 0;
>   }
>   
>   static struct lock_class_key qpnpint_irq_lock_class, qpnpint_irq_request_class;
>   
> -static void qpnpint_irq_domain_map(struct spmi_pmic_arb *pmic_arb,
> +static void qpnpint_irq_domain_map(struct spmi_pmic_arb_bus *bus,
>   				   struct irq_domain *domain, unsigned int virq,
>   				   irq_hw_number_t hwirq, unsigned int type)
>   {
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	irq_flow_handler_t handler;
>   
> -	dev_dbg(&pmic_arb->spmic->dev, "virq = %u, hwirq = %lu, type = %u\n",
> +	dev_dbg(&bus->spmic->dev, "virq = %u, hwirq = %lu, type = %u\n",
>   		virq, hwirq, type);
>   
>   	if (type & IRQ_TYPE_EDGE_BOTH)
> @@ -928,7 +959,7 @@ static int qpnpint_irq_domain_alloc(struct irq_domain *domain,
>   				    unsigned int virq, unsigned int nr_irqs,
>   				    void *data)
>   {
> -	struct spmi_pmic_arb *pmic_arb = domain->host_data;
> +	struct spmi_pmic_arb_bus *bus = domain->host_data;
>   	struct irq_fwspec *fwspec = data;
>   	irq_hw_number_t hwirq;
>   	unsigned int type;
> @@ -939,20 +970,22 @@ static int qpnpint_irq_domain_alloc(struct irq_domain *domain,
>   		return ret;
>   
>   	for (i = 0; i < nr_irqs; i++)
> -		qpnpint_irq_domain_map(pmic_arb, domain, virq + i, hwirq + i,
> +		qpnpint_irq_domain_map(bus, domain, virq + i, hwirq + i,
>   				       type);
>   
>   	return 0;
>   }
>   
> -static int pmic_arb_init_apid_min_max(struct spmi_pmic_arb *pmic_arb)
> +static int pmic_arb_init_apid_min_max(struct spmi_pmic_arb_bus *bus)
>   {
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
> +
>   	/*
>   	 * Initialize max_apid/min_apid to the opposite bounds, during
>   	 * the irq domain translation, we are sure to update these
>   	 */
> -	pmic_arb->max_apid = 0;
> -	pmic_arb->min_apid = pmic_arb->max_periphs - 1;
> +	bus->max_apid = 0;
> +	bus->min_apid = pmic_arb->max_periphs - 1;
>   
>   	return 0;
>   }
> @@ -970,43 +1003,44 @@ static int pmic_arb_get_core_resources_v1(struct platform_device *pdev,
>   	return 0;
>   }
>   
> -static int pmic_arb_init_apid_v1(struct spmi_pmic_arb *pmic_arb, int index)
> +static int pmic_arb_init_apid_v1(struct spmi_pmic_arb_bus *bus, int index)
>   {
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	u32 *mapping_table;
>   
>   	if (index) {
> -		dev_err(&pmic_arb->spmic->dev, "Unsupported buses count %d detected\n",
> +		dev_err(&bus->spmic->dev, "Unsupported buses count %d detected\n",
>   			index);
>   		return -EINVAL;
>   	}
>   
> -	mapping_table = devm_kcalloc(&pmic_arb->spmic->dev, pmic_arb->max_periphs,
> +	mapping_table = devm_kcalloc(&bus->spmic->dev, pmic_arb->max_periphs,
>   				     sizeof(*mapping_table), GFP_KERNEL);
>   	if (!mapping_table)
>   		return -ENOMEM;
>   
> -	pmic_arb->mapping_table = mapping_table;
> +	bus->mapping_table = mapping_table;
>   
> -	return pmic_arb_init_apid_min_max(pmic_arb);
> +	return pmic_arb_init_apid_min_max(bus);
>   }
>   
> -static int pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pmic_arb, u16 ppid)
> +static int pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb_bus *bus, u16 ppid)
>   {
> -	u32 *mapping_table = pmic_arb->mapping_table;
> +	u32 *mapping_table = bus->mapping_table;
>   	int index = 0, i;
>   	u16 apid_valid;
>   	u16 apid;
>   	u32 data;
>   
> -	apid_valid = pmic_arb->ppid_to_apid[ppid];
> +	apid_valid = bus->ppid_to_apid[ppid];
>   	if (apid_valid & PMIC_ARB_APID_VALID) {
>   		apid = apid_valid & ~PMIC_ARB_APID_VALID;
>   		return apid;
>   	}
>   
>   	for (i = 0; i < SPMI_MAPPING_TABLE_TREE_DEPTH; ++i) {
> -		if (!test_and_set_bit(index, pmic_arb->mapping_table_valid))
> -			mapping_table[index] = readl_relaxed(pmic_arb->cnfg +
> +		if (!test_and_set_bit(index, bus->mapping_table_valid))
> +			mapping_table[index] = readl_relaxed(bus->cnfg +
>   						SPMI_MAPPING_TABLE_REG(index));
>   
>   		data = mapping_table[index];
> @@ -1016,9 +1050,9 @@ static int pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pmic_arb, u16 ppid)
>   				index = SPMI_MAPPING_BIT_IS_1_RESULT(data);
>   			} else {
>   				apid = SPMI_MAPPING_BIT_IS_1_RESULT(data);
> -				pmic_arb->ppid_to_apid[ppid]
> +				bus->ppid_to_apid[ppid]
>   					= apid | PMIC_ARB_APID_VALID;
> -				pmic_arb->apid_data[apid].ppid = ppid;
> +				bus->apid_data[apid].ppid = ppid;
>   				return apid;
>   			}
>   		} else {
> @@ -1026,9 +1060,9 @@ static int pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pmic_arb, u16 ppid)
>   				index = SPMI_MAPPING_BIT_IS_0_RESULT(data);
>   			} else {
>   				apid = SPMI_MAPPING_BIT_IS_0_RESULT(data);
> -				pmic_arb->ppid_to_apid[ppid]
> +				bus->ppid_to_apid[ppid]
>   					= apid | PMIC_ARB_APID_VALID;
> -				pmic_arb->apid_data[apid].ppid = ppid;
> +				bus->apid_data[apid].ppid = ppid;
>   				return apid;
>   			}
>   		}
> @@ -1038,24 +1072,26 @@ static int pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pmic_arb, u16 ppid)
>   }
>   
>   /* v1 offset per ee */
> -static int pmic_arb_offset_v1(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
> -			enum pmic_arb_channel ch_type)
> +static int pmic_arb_offset_v1(struct spmi_pmic_arb_bus *bus, u8 sid, u16 addr,
> +			      enum pmic_arb_channel ch_type)
>   {
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	return 0x800 + 0x80 * pmic_arb->channel;
>   }
>   
> -static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pmic_arb, u16 ppid)
> +static u16 pmic_arb_find_apid(struct spmi_pmic_arb_bus *bus, u16 ppid)
>   {
> -	struct apid_data *apidd = &pmic_arb->apid_data[pmic_arb->last_apid];
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
> +	struct apid_data *apidd = &bus->apid_data[bus->last_apid];
>   	u32 regval, offset;
>   	u16 id, apid;
>   
> -	for (apid = pmic_arb->last_apid; ; apid++, apidd++) {
> +	for (apid = bus->last_apid; ; apid++, apidd++) {
>   		offset = pmic_arb->ver_ops->apid_map_offset(apid);
>   		if (offset >= pmic_arb->core_size)
>   			break;
>   
> -		regval = readl_relaxed(pmic_arb->ver_ops->apid_owner(pmic_arb,
> +		regval = readl_relaxed(pmic_arb->ver_ops->apid_owner(bus,
>   								     apid));
>   		apidd->irq_ee = SPMI_OWNERSHIP_PERIPH2OWNER(regval);
>   		apidd->write_ee = apidd->irq_ee;
> @@ -1065,14 +1101,14 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pmic_arb, u16 ppid)
>   			continue;
>   
>   		id = (regval >> 8) & PMIC_ARB_PPID_MASK;
> -		pmic_arb->ppid_to_apid[id] = apid | PMIC_ARB_APID_VALID;
> +		bus->ppid_to_apid[id] = apid | PMIC_ARB_APID_VALID;
>   		apidd->ppid = id;
>   		if (id == ppid) {
>   			apid |= PMIC_ARB_APID_VALID;
>   			break;
>   		}
>   	}
> -	pmic_arb->last_apid = apid & ~PMIC_ARB_APID_VALID;
> +	bus->last_apid = apid & ~PMIC_ARB_APID_VALID;
>   
>   	return apid;
>   }
> @@ -1104,21 +1140,22 @@ static int pmic_arb_get_core_resources_v2(struct platform_device *pdev,
>   	return pmic_arb_get_obsrvr_chnls_v2(pdev);
>   }
>   
> -static int pmic_arb_ppid_to_apid_v2(struct spmi_pmic_arb *pmic_arb, u16 ppid)
> +static int pmic_arb_ppid_to_apid_v2(struct spmi_pmic_arb_bus *bus, u16 ppid)
>   {
>   	u16 apid_valid;
>   
> -	apid_valid = pmic_arb->ppid_to_apid[ppid];
> +	apid_valid = bus->ppid_to_apid[ppid];
>   	if (!(apid_valid & PMIC_ARB_APID_VALID))
> -		apid_valid = pmic_arb_find_apid(pmic_arb, ppid);
> +		apid_valid = pmic_arb_find_apid(bus, ppid);
>   	if (!(apid_valid & PMIC_ARB_APID_VALID))
>   		return -ENODEV;
>   
>   	return apid_valid & ~PMIC_ARB_APID_VALID;
>   }
>   
> -static int pmic_arb_read_apid_map_v5(struct spmi_pmic_arb *pmic_arb)
> +static int pmic_arb_read_apid_map_v5(struct spmi_pmic_arb_bus *bus)
>   {
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	struct apid_data *apidd;
>   	struct apid_data *prev_apidd;
>   	u16 i, apid, ppid, apid_max;
> @@ -1140,9 +1177,9 @@ static int pmic_arb_read_apid_map_v5(struct spmi_pmic_arb *pmic_arb)
>   	 * where N = number of APIDs supported by the primary bus and
>   	 *       M = number of APIDs supported by the secondary bus
>   	 */
> -	apidd = &pmic_arb->apid_data[pmic_arb->base_apid];
> -	apid_max = pmic_arb->base_apid + pmic_arb->apid_count;
> -	for (i = pmic_arb->base_apid; i < apid_max; i++, apidd++) {
> +	apidd = &bus->apid_data[bus->base_apid];
> +	apid_max = bus->base_apid + bus->apid_count;
> +	for (i = bus->base_apid; i < apid_max; i++, apidd++) {
>   		offset = pmic_arb->ver_ops->apid_map_offset(i);
>   		if (offset >= pmic_arb->core_size)
>   			break;
> @@ -1153,19 +1190,18 @@ static int pmic_arb_read_apid_map_v5(struct spmi_pmic_arb *pmic_arb)
>   		ppid = (regval >> 8) & PMIC_ARB_PPID_MASK;
>   		is_irq_ee = PMIC_ARB_CHAN_IS_IRQ_OWNER(regval);
>   
> -		regval = readl_relaxed(pmic_arb->ver_ops->apid_owner(pmic_arb,
> -								     i));
> +		regval = readl_relaxed(pmic_arb->ver_ops->apid_owner(bus, i));
>   		apidd->write_ee = SPMI_OWNERSHIP_PERIPH2OWNER(regval);
>   
>   		apidd->irq_ee = is_irq_ee ? apidd->write_ee : INVALID_EE;
>   
> -		valid = pmic_arb->ppid_to_apid[ppid] & PMIC_ARB_APID_VALID;
> -		apid = pmic_arb->ppid_to_apid[ppid] & ~PMIC_ARB_APID_VALID;
> -		prev_apidd = &pmic_arb->apid_data[apid];
> +		valid = bus->ppid_to_apid[ppid] & PMIC_ARB_APID_VALID;
> +		apid = bus->ppid_to_apid[ppid] & ~PMIC_ARB_APID_VALID;
> +		prev_apidd = &bus->apid_data[apid];
>   
>   		if (!valid || apidd->write_ee == pmic_arb->ee) {
>   			/* First PPID mapping or one for this EE */
> -			pmic_arb->ppid_to_apid[ppid] = i | PMIC_ARB_APID_VALID;
> +			bus->ppid_to_apid[ppid] = i | PMIC_ARB_APID_VALID;
>   		} else if (valid && is_irq_ee &&
>   			   prev_apidd->write_ee == pmic_arb->ee) {
>   			/*
> @@ -1176,42 +1212,43 @@ static int pmic_arb_read_apid_map_v5(struct spmi_pmic_arb *pmic_arb)
>   		}
>   
>   		apidd->ppid = ppid;
> -		pmic_arb->last_apid = i;
> +		bus->last_apid = i;
>   	}
>   
>   	/* Dump the mapping table for debug purposes. */
> -	dev_dbg(&pmic_arb->spmic->dev, "PPID APID Write-EE IRQ-EE\n");
> +	dev_dbg(&bus->spmic->dev, "PPID APID Write-EE IRQ-EE\n");
>   	for (ppid = 0; ppid < PMIC_ARB_MAX_PPID; ppid++) {
> -		apid = pmic_arb->ppid_to_apid[ppid];
> +		apid = bus->ppid_to_apid[ppid];
>   		if (apid & PMIC_ARB_APID_VALID) {
>   			apid &= ~PMIC_ARB_APID_VALID;
> -			apidd = &pmic_arb->apid_data[apid];
> -			dev_dbg(&pmic_arb->spmic->dev, "%#03X %3u %2u %2u\n",
> -			      ppid, apid, apidd->write_ee, apidd->irq_ee);
> +			apidd = &bus->apid_data[apid];
> +			dev_dbg(&bus->spmic->dev, "%#03X %3u %2u %2u\n",
> +				ppid, apid, apidd->write_ee, apidd->irq_ee);
>   		}
>   	}
>   
>   	return 0;
>   }
>   
> -static int pmic_arb_ppid_to_apid_v5(struct spmi_pmic_arb *pmic_arb, u16 ppid)
> +static int pmic_arb_ppid_to_apid_v5(struct spmi_pmic_arb_bus *bus, u16 ppid)
>   {
> -	if (!(pmic_arb->ppid_to_apid[ppid] & PMIC_ARB_APID_VALID))
> +	if (!(bus->ppid_to_apid[ppid] & PMIC_ARB_APID_VALID))
>   		return -ENODEV;
>   
> -	return pmic_arb->ppid_to_apid[ppid] & ~PMIC_ARB_APID_VALID;
> +	return bus->ppid_to_apid[ppid] & ~PMIC_ARB_APID_VALID;
>   }
>   
>   /* v2 offset per ppid and per ee */
> -static int pmic_arb_offset_v2(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
> -			   enum pmic_arb_channel ch_type)
> +static int pmic_arb_offset_v2(struct spmi_pmic_arb_bus *bus, u8 sid, u16 addr,
> +			      enum pmic_arb_channel ch_type)
>   {
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	u16 apid;
>   	u16 ppid;
>   	int rc;
>   
>   	ppid = sid << 8 | ((addr >> 8) & 0xFF);
> -	rc = pmic_arb_ppid_to_apid_v2(pmic_arb, ppid);
> +	rc = pmic_arb_ppid_to_apid_v2(bus, ppid);
>   	if (rc < 0)
>   		return rc;
>   
> @@ -1219,33 +1256,34 @@ static int pmic_arb_offset_v2(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
>   	return 0x1000 * pmic_arb->ee + 0x8000 * apid;
>   }
>   
> -static int pmic_arb_init_apid_v5(struct spmi_pmic_arb *pmic_arb, int index)
> +static int pmic_arb_init_apid_v5(struct spmi_pmic_arb_bus *bus, int index)
>   {
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	int ret;
>   
>   	if (index) {
> -		dev_err(&pmic_arb->spmic->dev, "Unsupported buses count %d detected\n",
> +		dev_err(&bus->spmic->dev, "Unsupported buses count %d detected\n",
>   			index);
>   		return -EINVAL;
>   	}
>   
> -	pmic_arb->base_apid = 0;
> -	pmic_arb->apid_count = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES) &
> +	bus->base_apid = 0;
> +	bus->apid_count = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES) &
>   					   PMIC_ARB_FEATURES_PERIPH_MASK;
>   
> -	if (pmic_arb->base_apid + pmic_arb->apid_count > pmic_arb->max_periphs) {
> -		dev_err(&pmic_arb->spmic->dev, "Unsupported APID count %d detected\n",
> -			pmic_arb->base_apid + pmic_arb->apid_count);
> +	if (bus->base_apid + bus->apid_count > pmic_arb->max_periphs) {
> +		dev_err(&bus->spmic->dev, "Unsupported APID count %d detected\n",
> +			bus->base_apid + bus->apid_count);
>   		return -EINVAL;
>   	}
>   
> -	ret = pmic_arb_init_apid_min_max(pmic_arb);
> +	ret = pmic_arb_init_apid_min_max(bus);
>   	if (ret)
>   		return ret;
>   
> -	ret = pmic_arb_read_apid_map_v5(pmic_arb);
> +	ret = pmic_arb_read_apid_map_v5(bus);
>   	if (ret) {
> -		dev_err(&pmic_arb->spmic->dev, "could not read APID->PPID mapping table, rc= %d\n",
> +		dev_err(&bus->spmic->dev, "could not read APID->PPID mapping table, rc= %d\n",
>   			ret);
>   		return ret;
>   	}
> @@ -1257,15 +1295,16 @@ static int pmic_arb_init_apid_v5(struct spmi_pmic_arb *pmic_arb, int index)
>    * v5 offset per ee and per apid for observer channels and per apid for
>    * read/write channels.
>    */
> -static int pmic_arb_offset_v5(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
> -			   enum pmic_arb_channel ch_type)
> +static int pmic_arb_offset_v5(struct spmi_pmic_arb_bus *bus, u8 sid, u16 addr,
> +			      enum pmic_arb_channel ch_type)
>   {
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	u16 apid;
>   	int rc;
>   	u32 offset = 0;
>   	u16 ppid = (sid << 8) | (addr >> 8);
>   
> -	rc = pmic_arb_ppid_to_apid_v5(pmic_arb, ppid);
> +	rc = pmic_arb_ppid_to_apid_v5(bus, ppid);
>   	if (rc < 0)
>   		return rc;
>   
> @@ -1275,8 +1314,8 @@ static int pmic_arb_offset_v5(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
>   		offset = 0x10000 * pmic_arb->ee + 0x80 * apid;
>   		break;
>   	case PMIC_ARB_CHANNEL_RW:
> -		if (pmic_arb->apid_data[apid].write_ee != pmic_arb->ee) {
> -			dev_err(&pmic_arb->spmic->dev, "disallowed SPMI write to sid=%u, addr=0x%04X\n",
> +		if (bus->apid_data[apid].write_ee != pmic_arb->ee) {
> +			dev_err(&bus->spmic->dev, "disallowed SPMI write to sid=%u, addr=0x%04X\n",
>   				sid, addr);
>   			return -EPERM;
>   		}
> @@ -1303,38 +1342,39 @@ static int pmic_arb_get_core_resources_v7(struct platform_device *pdev,
>    * Only v7 supports 2 buses. Each bus will get a different apid count, read
>    * from different registers.
>    */
> -static int pmic_arb_init_apid_v7(struct spmi_pmic_arb *pmic_arb, int index)
> +static int pmic_arb_init_apid_v7(struct spmi_pmic_arb_bus *bus, int index)
>   {
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	int ret;
>   
>   	if (index == 0) {
> -		pmic_arb->base_apid = 0;
> -		pmic_arb->apid_count = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES) &
> +		bus->base_apid = 0;
> +		bus->apid_count = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES) &
>   						   PMIC_ARB_FEATURES_PERIPH_MASK;
>   	} else if (index == 1) {
> -		pmic_arb->base_apid = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES) &
> +		bus->base_apid = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES) &
>   						  PMIC_ARB_FEATURES_PERIPH_MASK;
> -		pmic_arb->apid_count = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES1) &
> +		bus->apid_count = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES1) &
>   						   PMIC_ARB_FEATURES_PERIPH_MASK;
>   	} else {
> -		dev_err(&pmic_arb->spmic->dev, "Unsupported buses count %d detected\n",
> -			index);
> +		dev_err(&bus->spmic->dev, "Unsupported buses count %d detected\n",
> +			bus->id);
>   		return -EINVAL;
>   	}
>   
> -	if (pmic_arb->base_apid + pmic_arb->apid_count > pmic_arb->max_periphs) {
> -		dev_err(&pmic_arb->spmic->dev, "Unsupported APID count %d detected\n",
> -			pmic_arb->base_apid + pmic_arb->apid_count);
> +	if (bus->base_apid + bus->apid_count > pmic_arb->max_periphs) {
> +		dev_err(&bus->spmic->dev, "Unsupported APID count %d detected\n",
> +			bus->base_apid + bus->apid_count);
>   		return -EINVAL;
>   	}
>   
> -	ret = pmic_arb_init_apid_min_max(pmic_arb);
> +	ret = pmic_arb_init_apid_min_max(bus);
>   	if (ret)
>   		return ret;
>   
> -	ret = pmic_arb_read_apid_map_v5(pmic_arb);
> +	ret = pmic_arb_read_apid_map_v5(bus);
>   	if (ret) {
> -		dev_err(&pmic_arb->spmic->dev, "could not read APID->PPID mapping table, rc= %d\n",
> +		dev_err(&bus->spmic->dev, "could not read APID->PPID mapping table, rc= %d\n",
>   			ret);
>   		return ret;
>   	}
> @@ -1346,15 +1386,16 @@ static int pmic_arb_init_apid_v7(struct spmi_pmic_arb *pmic_arb, int index)
>    * v7 offset per ee and per apid for observer channels and per apid for
>    * read/write channels.
>    */
> -static int pmic_arb_offset_v7(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
> -			   enum pmic_arb_channel ch_type)
> +static int pmic_arb_offset_v7(struct spmi_pmic_arb_bus *bus, u8 sid, u16 addr,
> +			      enum pmic_arb_channel ch_type)
>   {
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	u16 apid;
>   	int rc;
>   	u32 offset = 0;
>   	u16 ppid = (sid << 8) | (addr >> 8);
>   
> -	rc = pmic_arb->ver_ops->ppid_to_apid(pmic_arb, ppid);
> +	rc = pmic_arb->ver_ops->ppid_to_apid(bus, ppid);
>   	if (rc < 0)
>   		return rc;
>   
> @@ -1364,8 +1405,8 @@ static int pmic_arb_offset_v7(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
>   		offset = 0x8000 * pmic_arb->ee + 0x20 * apid;
>   		break;
>   	case PMIC_ARB_CHANNEL_RW:
> -		if (pmic_arb->apid_data[apid].write_ee != pmic_arb->ee) {
> -			dev_err(&pmic_arb->spmic->dev, "disallowed SPMI write to sid=%u, addr=0x%04X\n",
> +		if (bus->apid_data[apid].write_ee != pmic_arb->ee) {
> +			dev_err(&bus->spmic->dev, "disallowed SPMI write to sid=%u, addr=0x%04X\n",
>   				sid, addr);
>   			return -EPERM;
>   		}
> @@ -1387,104 +1428,110 @@ static u32 pmic_arb_fmt_cmd_v2(u8 opc, u8 sid, u16 addr, u8 bc)
>   }
>   
>   static void __iomem *
> -pmic_arb_owner_acc_status_v1(struct spmi_pmic_arb *pmic_arb, u8 m, u16 n)
> +pmic_arb_owner_acc_status_v1(struct spmi_pmic_arb_bus *bus, u8 m, u16 n)
>   {
> -	return pmic_arb->intr + 0x20 * m + 0x4 * n;
> +	return bus->intr + 0x20 * m + 0x4 * n;
>   }
>   
>   static void __iomem *
> -pmic_arb_owner_acc_status_v2(struct spmi_pmic_arb *pmic_arb, u8 m, u16 n)
> +pmic_arb_owner_acc_status_v2(struct spmi_pmic_arb_bus *bus, u8 m, u16 n)
>   {
> -	return pmic_arb->intr + 0x100000 + 0x1000 * m + 0x4 * n;
> +	return bus->intr + 0x100000 + 0x1000 * m + 0x4 * n;
>   }
>   
>   static void __iomem *
> -pmic_arb_owner_acc_status_v3(struct spmi_pmic_arb *pmic_arb, u8 m, u16 n)
> +pmic_arb_owner_acc_status_v3(struct spmi_pmic_arb_bus *bus, u8 m, u16 n)
>   {
> -	return pmic_arb->intr + 0x200000 + 0x1000 * m + 0x4 * n;
> +	return bus->intr + 0x200000 + 0x1000 * m + 0x4 * n;
>   }
>   
>   static void __iomem *
> -pmic_arb_owner_acc_status_v5(struct spmi_pmic_arb *pmic_arb, u8 m, u16 n)
> +pmic_arb_owner_acc_status_v5(struct spmi_pmic_arb_bus *bus, u8 m, u16 n)
>   {
> -	return pmic_arb->intr + 0x10000 * m + 0x4 * n;
> +	return bus->intr + 0x10000 * m + 0x4 * n;
>   }
>   
>   static void __iomem *
> -pmic_arb_owner_acc_status_v7(struct spmi_pmic_arb *pmic_arb, u8 m, u16 n)
> +pmic_arb_owner_acc_status_v7(struct spmi_pmic_arb_bus *bus, u8 m, u16 n)
>   {
> -	return pmic_arb->intr + 0x1000 * m + 0x4 * n;
> +	return bus->intr + 0x1000 * m + 0x4 * n;
>   }
>   
>   static void __iomem *
> -pmic_arb_acc_enable_v1(struct spmi_pmic_arb *pmic_arb, u16 n)
> +pmic_arb_acc_enable_v1(struct spmi_pmic_arb_bus *bus, u16 n)
>   {
> -	return pmic_arb->intr + 0x200 + 0x4 * n;
> +	return bus->intr + 0x200 + 0x4 * n;
>   }
>   
>   static void __iomem *
> -pmic_arb_acc_enable_v2(struct spmi_pmic_arb *pmic_arb, u16 n)
> +pmic_arb_acc_enable_v2(struct spmi_pmic_arb_bus *bus, u16 n)
>   {
> -	return pmic_arb->intr + 0x1000 * n;
> +	return bus->intr + 0x1000 * n;
>   }
>   
>   static void __iomem *
> -pmic_arb_acc_enable_v5(struct spmi_pmic_arb *pmic_arb, u16 n)
> +pmic_arb_acc_enable_v5(struct spmi_pmic_arb_bus *bus, u16 n)
>   {
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	return pmic_arb->wr_base + 0x100 + 0x10000 * n;
>   }
>   
>   static void __iomem *
> -pmic_arb_acc_enable_v7(struct spmi_pmic_arb *pmic_arb, u16 n)
> +pmic_arb_acc_enable_v7(struct spmi_pmic_arb_bus *bus, u16 n)
>   {
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	return pmic_arb->wr_base + 0x100 + 0x1000 * n;
>   }
>   
>   static void __iomem *
> -pmic_arb_irq_status_v1(struct spmi_pmic_arb *pmic_arb, u16 n)
> +pmic_arb_irq_status_v1(struct spmi_pmic_arb_bus *bus, u16 n)
>   {
> -	return pmic_arb->intr + 0x600 + 0x4 * n;
> +	return bus->intr + 0x600 + 0x4 * n;
>   }
>   
>   static void __iomem *
> -pmic_arb_irq_status_v2(struct spmi_pmic_arb *pmic_arb, u16 n)
> +pmic_arb_irq_status_v2(struct spmi_pmic_arb_bus *bus, u16 n)
>   {
> -	return pmic_arb->intr + 0x4 + 0x1000 * n;
> +	return bus->intr + 0x4 + 0x1000 * n;
>   }
>   
>   static void __iomem *
> -pmic_arb_irq_status_v5(struct spmi_pmic_arb *pmic_arb, u16 n)
> +pmic_arb_irq_status_v5(struct spmi_pmic_arb_bus *bus, u16 n)
>   {
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	return pmic_arb->wr_base + 0x104 + 0x10000 * n;
>   }
>   
>   static void __iomem *
> -pmic_arb_irq_status_v7(struct spmi_pmic_arb *pmic_arb, u16 n)
> +pmic_arb_irq_status_v7(struct spmi_pmic_arb_bus *bus, u16 n)
>   {
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	return pmic_arb->wr_base + 0x104 + 0x1000 * n;
>   }
>   
>   static void __iomem *
> -pmic_arb_irq_clear_v1(struct spmi_pmic_arb *pmic_arb, u16 n)
> +pmic_arb_irq_clear_v1(struct spmi_pmic_arb_bus *bus, u16 n)
>   {
> -	return pmic_arb->intr + 0xA00 + 0x4 * n;
> +	return bus->intr + 0xA00 + 0x4 * n;
>   }
>   
>   static void __iomem *
> -pmic_arb_irq_clear_v2(struct spmi_pmic_arb *pmic_arb, u16 n)
> +pmic_arb_irq_clear_v2(struct spmi_pmic_arb_bus *bus, u16 n)
>   {
> -	return pmic_arb->intr + 0x8 + 0x1000 * n;
> +	return bus->intr + 0x8 + 0x1000 * n;
>   }
>   
>   static void __iomem *
> -pmic_arb_irq_clear_v5(struct spmi_pmic_arb *pmic_arb, u16 n)
> +pmic_arb_irq_clear_v5(struct spmi_pmic_arb_bus *bus, u16 n)
>   {
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	return pmic_arb->wr_base + 0x108 + 0x10000 * n;
>   }
>   
>   static void __iomem *
> -pmic_arb_irq_clear_v7(struct spmi_pmic_arb *pmic_arb, u16 n)
> +pmic_arb_irq_clear_v7(struct spmi_pmic_arb_bus *bus, u16 n)
>   {
> +	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
>   	return pmic_arb->wr_base + 0x108 + 0x1000 * n;
>   }
>   
> @@ -1504,9 +1551,9 @@ static u32 pmic_arb_apid_map_offset_v7(u16 n)
>   }
>   
>   static void __iomem *
> -pmic_arb_apid_owner_v2(struct spmi_pmic_arb *pmic_arb, u16 n)
> +pmic_arb_apid_owner_v2(struct spmi_pmic_arb_bus *bus, u16 n)
>   {
> -	return pmic_arb->cnfg + 0x700 + 0x4 * n;
> +	return bus->cnfg + 0x700 + 0x4 * n;
>   }
>   
>   /*
> @@ -1515,9 +1562,9 @@ pmic_arb_apid_owner_v2(struct spmi_pmic_arb *pmic_arb, u16 n)
>    * 0.
>    */
>   static void __iomem *
> -pmic_arb_apid_owner_v7(struct spmi_pmic_arb *pmic_arb, u16 n)
> +pmic_arb_apid_owner_v7(struct spmi_pmic_arb_bus *bus, u16 n)
>   {
> -	return pmic_arb->cnfg + 0x4 * (n - pmic_arb->base_apid);
> +	return  bus->cnfg + 0x4 * (n - bus->base_apid);
>   }
>   
>   static const struct pmic_arb_ver_ops pmic_arb_v1 = {
> @@ -1607,29 +1654,159 @@ static const struct irq_domain_ops pmic_arb_irq_domain_ops = {
>   	.translate = qpnpint_irq_domain_translate,
>   };
>   
> +static int spmi_pmic_arb_bus_init(struct platform_device *pdev,
> +				  struct device_node *node,
> +				  struct spmi_pmic_arb *pmic_arb)
> +{
> +	int bus_index = pmic_arb->buses_available;
> +	struct spmi_pmic_arb_bus *bus = &pmic_arb->buses[bus_index];
> +	struct device *dev = &pdev->dev;
> +	struct spmi_controller *ctrl;
> +	void __iomem *intr;
> +	void __iomem *cnfg;
> +	int index, ret;
> +	u32 irq;
> +
> +	ctrl = devm_spmi_controller_alloc(dev, sizeof(*ctrl));
> +	if (IS_ERR(ctrl))
> +		return PTR_ERR(ctrl);
> +
> +	ctrl->cmd = pmic_arb_cmd;
> +	ctrl->read_cmd = pmic_arb_read_cmd;
> +	ctrl->write_cmd = pmic_arb_write_cmd;
> +
> +	bus = spmi_controller_get_drvdata(ctrl);
> +	bus->spmic = ctrl;
> +
> +	bus->ppid_to_apid = devm_kcalloc(dev, PMIC_ARB_MAX_PPID,
> +					 sizeof(*bus->ppid_to_apid),
> +					 GFP_KERNEL);
> +	if (!bus->ppid_to_apid)
> +		return -ENOMEM;
> +
> +	bus->apid_data = devm_kcalloc(dev, pmic_arb->max_periphs,
> +				      sizeof(*bus->apid_data),
> +				      GFP_KERNEL);
> +	if (!bus->apid_data)
> +		return -ENOMEM;
> +
> +	index = of_property_match_string(node, "reg-names", "cnfg");
> +	if (index < 0) {
> +		dev_err(dev, "cnfg reg region missing");
> +		return -EINVAL;
> +	}
> +
> +	cnfg = devm_of_iomap(dev, node, index, NULL);
> +	if (IS_ERR(cnfg))
> +		return PTR_ERR(cnfg);
> +
> +	index = of_property_match_string(node, "reg-names", "intr");
> +	if (index < 0) {
> +		dev_err(dev, "intr reg region missing");
> +		return -EINVAL;
> +	}
> +
> +	intr = devm_of_iomap(dev, node, index, NULL);
> +	if (IS_ERR(intr))
> +		return PTR_ERR(intr);
> +
> +	irq = of_irq_get_byname(node, "periph_irq");
> +	if (irq < 0)
> +		return irq;
> +
> +	bus->pmic_arb = pmic_arb;
> +	bus->intr = intr;
> +	bus->cnfg = cnfg;
> +	bus->irq = irq;
> +	bus->id = bus_index;
> +
> +	ret = pmic_arb->ver_ops->init_apid(bus, bus_index);
> +	if (ret)
> +		return ret;
> +
> +	dev_dbg(&pdev->dev, "adding irq domain for bus %d\n", bus_index);
> +
> +	bus->domain = irq_domain_add_tree(dev->of_node,
> +					  &pmic_arb_irq_domain_ops, bus);
> +	if (!bus->domain) {
> +		dev_err(&pdev->dev, "unable to create irq_domain\n");
> +		return -ENOMEM;
> +	}
> +
> +	irq_set_chained_handler_and_data(bus->irq,
> +					 pmic_arb_chained_irq, bus);
> +
> +	bus->spmic->dev.of_node = node;
> +	dev_set_name(&bus->spmic->dev, "spmi-%d", bus_index);
> +
> +	ret = devm_spmi_controller_add(dev, bus->spmic);
> +	if (ret)
> +		return ret;
> +
> +	pmic_arb->buses_available++;
> +
> +	return 0;
> +}
> +
> +static int spmi_pmic_arb_register_buses(struct spmi_pmic_arb *pmic_arb,
> +					struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct device_node *node = dev->of_node;
> +	struct device_node *child;
> +	int ret;
> +
> +	/* legacy mode doesn't provide child node for the bus */
> +	if (of_device_is_compatible(node, "qcom,spmi-pmic-arb"))
> +		return spmi_pmic_arb_bus_init(pdev, node, pmic_arb);
> +
> +	for_each_available_child_of_node(node, child) {
> +		if (of_node_name_eq(child, "spmi")) {
> +			ret = spmi_pmic_arb_bus_init(pdev, child, pmic_arb);
> +			if (ret)
> +				return ret;
> +		}
> +	}
> +
> +	return ret;
> +}
> +
> +static void spmi_pmic_arb_deregister_buses(struct spmi_pmic_arb *pmic_arb)
> +{
> +	int i;
> +
> +	for (i = 0; i < PMIC_ARB_MAX_BUSES; i++) {
> +		struct spmi_pmic_arb_bus *bus = &pmic_arb->buses[i];
> +
> +		irq_set_chained_handler_and_data(bus->irq,
> +						 NULL, NULL);
> +		irq_domain_remove(bus->domain);
> +	}
> +}
> +
>   static int spmi_pmic_arb_probe(struct platform_device *pdev)
>   {
>   	struct spmi_pmic_arb *pmic_arb;
> -	struct spmi_controller *ctrl;
> +	struct device *dev = &pdev->dev;
>   	struct resource *res;
>   	void __iomem *core;
>   	u32 channel, ee, hw_ver;
>   	int err;
>   
> -	ctrl = devm_spmi_controller_alloc(&pdev->dev, sizeof(*pmic_arb));
> -	if (IS_ERR(ctrl))
> -		return PTR_ERR(ctrl);
> -
> -	pmic_arb = spmi_controller_get_drvdata(ctrl);
> -	pmic_arb->spmic = ctrl;
> +	pmic_arb = devm_kzalloc(dev, sizeof(*pmic_arb), GFP_KERNEL);
> +	if (!pmic_arb)
> +		return -ENOMEM;
>   
>   	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "core");
> -	core = devm_ioremap(&ctrl->dev, res->start, resource_size(res));
> +	core = devm_ioremap(dev, res->start, resource_size(res));
>   	if (IS_ERR(core))
>   		return PTR_ERR(core);
>   
>   	pmic_arb->core_size = resource_size(res);
>   
> +	platform_set_drvdata(pdev, pmic_arb);
> +	raw_spin_lock_init(&pmic_arb->lock);
> +
>   	hw_ver = readl_relaxed(core + PMIC_ARB_VERSION);
>   
>   	if (hw_ver < PMIC_ARB_VERSION_V2_MIN)
> @@ -1643,30 +1820,12 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
>   	else
>   		pmic_arb->ver_ops = &pmic_arb_v7;
>   
> -	dev_info(&ctrl->dev, "PMIC arbiter version %s (0x%x)\n",
> -		 pmic_arb->ver_ops->ver_str, hw_ver);
> -
>   	err = pmic_arb->ver_ops->get_core_resources(pdev, core);
>   	if (err)
>   		return err;
>   
> -	err = pmic_arb->ver_ops->init_apid(pmic_arb, 0);
> -	if (err)
> -		return err;
> -
> -	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "intr");
> -	pmic_arb->intr = devm_ioremap_resource(&ctrl->dev, res);
> -	if (IS_ERR(pmic_arb->intr))
> -		return PTR_ERR(pmic_arb->intr);
> -
> -	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cnfg");
> -	pmic_arb->cnfg = devm_ioremap_resource(&ctrl->dev, res);
> -	if (IS_ERR(pmic_arb->cnfg))
> -		return PTR_ERR(pmic_arb->cnfg);
> -
> -	pmic_arb->irq = platform_get_irq_byname(pdev, "periph_irq");
> -	if (pmic_arb->irq < 0)
> -		return pmic_arb->irq;
> +	dev_info(dev, "PMIC arbiter version %s (0x%x)\n",
> +		 pmic_arb->ver_ops->ver_str, hw_ver);
>   
>   	err = of_property_read_u32(pdev->dev.of_node, "qcom,channel", &channel);
>   	if (err) {
> @@ -1695,46 +1854,19 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
>   
>   	pmic_arb->ee = ee;
>   
> -	platform_set_drvdata(pdev, ctrl);
> -	raw_spin_lock_init(&pmic_arb->lock);
> -
> -	ctrl->cmd = pmic_arb_cmd;
> -	ctrl->read_cmd = pmic_arb_read_cmd;
> -	ctrl->write_cmd = pmic_arb_write_cmd;
> -
> -	dev_dbg(&pdev->dev, "adding irq domain\n");
> -	pmic_arb->domain = irq_domain_add_tree(pdev->dev.of_node,
> -					 &pmic_arb_irq_domain_ops, pmic_arb);
> -	if (!pmic_arb->domain) {
> -		dev_err(&pdev->dev, "unable to create irq_domain\n");
> -		return -ENOMEM;
> -	}
> -
> -	irq_set_chained_handler_and_data(pmic_arb->irq, pmic_arb_chained_irq,
> -					pmic_arb);
> -	err = spmi_controller_add(ctrl);
> -	if (err)
> -		goto err_domain_remove;
> -
> -	return 0;
> -
> -err_domain_remove:
> -	irq_set_chained_handler_and_data(pmic_arb->irq, NULL, NULL);
> -	irq_domain_remove(pmic_arb->domain);
> -	return err;
> +	return spmi_pmic_arb_register_buses(pmic_arb, pdev);
>   }
>   
>   static void spmi_pmic_arb_remove(struct platform_device *pdev)
>   {
> -	struct spmi_controller *ctrl = platform_get_drvdata(pdev);
> -	struct spmi_pmic_arb *pmic_arb = spmi_controller_get_drvdata(ctrl);
> -	spmi_controller_remove(ctrl);
> -	irq_set_chained_handler_and_data(pmic_arb->irq, NULL, NULL);
> -	irq_domain_remove(pmic_arb->domain);
> +	struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
> +
> +	spmi_pmic_arb_deregister_buses(pmic_arb);
>   }
>   
>   static const struct of_device_id spmi_pmic_arb_match_table[] = {
>   	{ .compatible = "qcom,spmi-pmic-arb", },
> +	{ .compatible = "qcom,x1e80100-spmi-pmic-arb", },
>   	{},
>   };
>   MODULE_DEVICE_TABLE(of, spmi_pmic_arb_match_table);
> 

The change is quite long and it's hard to disinguish the introduction of
spmi_pmic_arb_bus and the addition of 2 busses for v7.

Could you split in 2 by:
1) adding spmi_pmic_arb_bus but only registering a single bus
2) add the plumbing for 2 busses for v7

it would help review and bisecting.

Thanks,
Neil