@@ -268,6 +268,18 @@ config REGULATOR_BD957XMUF
This driver can also be built as a module. If so, the module
will be called bd9576-regulator.
+config REGULATOR_BD96801
+ tristate "ROHM BD96801 Power Regulator"
+ depends on MFD_ROHM_BD96801
+ select REGULATOR_ROHM
+ help
+ This driver supports voltage regulators on ROHM BD96801 PMIC.
+ This will enable support for the software controllable buck
+ and LDO regulators.
+
+ This driver can also be built as a module. If so, the module
+ will be called bd96801-regulator.
+
config REGULATOR_CPCAP
tristate "Motorola CPCAP regulator"
depends on MFD_CPCAP
@@ -37,6 +37,8 @@ obj-$(CONFIG_REGULATOR_BD718XX) += bd718x7-regulator.o
obj-$(CONFIG_REGULATOR_BD9571MWV) += bd9571mwv-regulator.o
obj-$(CONFIG_REGULATOR_BD957XMUF) += bd9576-regulator.o
obj-$(CONFIG_REGULATOR_DA903X) += da903x-regulator.o
+obj-$(CONFIG_REGULATOR_BD96801) += bd96801-regulator.o
+obj-$(CONFIG_REGULATOR_DA903X) += da903x.o
obj-$(CONFIG_REGULATOR_DA9052) += da9052-regulator.o
obj-$(CONFIG_REGULATOR_DA9055) += da9055-regulator.o
obj-$(CONFIG_REGULATOR_DA9062) += da9062-regulator.o
new file mode 100644
@@ -0,0 +1,908 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2024 ROHM Semiconductors
+// bd96801-regulator.c ROHM BD96801 regulator driver
+
+/*
+ * This version of the "BD86801 scalable PMIC"'s driver supports only very
+ * basic set of the PMIC features. Most notably, there is no support for
+ * the ERRB interrupt and the configurations which should be done when the
+ * PMIC is in STBY mode.
+ *
+ * Supporting the ERRB interrupt would require dropping the regmap-IRQ
+ * usage or working around (or accepting a presense of) a naming conflict
+ * in debugFS IRQs.
+ *
+ * Being able to reliably do the configurations like changing the
+ * regulator safety limits (like limits for the over/under -voltages, over
+ * current, thermal protection) would require the configuring driver to be
+ * synchronized with entity causing the PMIC state transitions. Eg, one
+ * should be able to ensure the PMIC is in STBY state when the
+ * configurations are applied to the hardware. How and when the PMIC state
+ * transitions are to be done is likely to be very system specific, as will
+ * be the need to configure these safety limits. Hence it's not simple to
+ * come up with a generic solution.
+ *
+ * Users who require the ERRB handling and STBY state configurations can
+ * have a look at the original RFC:
+ * https://lore.kernel.org/all/cover.1712920132.git.mazziesaccount@gmail.com/
+ * which implements a workaround to debugFS naming conflict and some of
+ * the safety limit configurations - but leaves the state change handling
+ * and synchronization to be implemented.
+ *
+ * It would be great to hear (and receive a patch!) if you implement the
+ * STBY configuration support or a proper fix to the debugFS naming
+ * conflict in your downstream driver ;)
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/linear_range.h>
+#include <linux/mfd/rohm-generic.h>
+#include <linux/mfd/rohm-bd96801.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/coupler.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/slab.h>
+#include <linux/timer.h>
+
+enum {
+ BD96801_BUCK1,
+ BD96801_BUCK2,
+ BD96801_BUCK3,
+ BD96801_BUCK4,
+ BD96801_LDO5,
+ BD96801_LDO6,
+ BD96801_LDO7,
+ BD96801_REGULATOR_AMOUNT,
+};
+
+enum {
+ BD96801_PROT_OVP,
+ BD96801_PROT_UVP,
+ BD96801_PROT_OCP,
+ BD96801_PROT_TEMP,
+ BD96801_NUM_PROT,
+};
+
+#define BD96801_ALWAYS_ON_REG 0x3c
+#define BD96801_REG_ENABLE 0x0b
+#define BD96801_BUCK1_EN_MASK BIT(0)
+#define BD96801_BUCK2_EN_MASK BIT(1)
+#define BD96801_BUCK3_EN_MASK BIT(2)
+#define BD96801_BUCK4_EN_MASK BIT(3)
+#define BD96801_LDO5_EN_MASK BIT(4)
+#define BD96801_LDO6_EN_MASK BIT(5)
+#define BD96801_LDO7_EN_MASK BIT(6)
+
+#define BD96801_BUCK1_VSEL_REG 0x28
+#define BD96801_BUCK2_VSEL_REG 0x29
+#define BD96801_BUCK3_VSEL_REG 0x2a
+#define BD96801_BUCK4_VSEL_REG 0x2b
+#define BD96801_LDO5_VSEL_REG 0x25
+#define BD96801_LDO6_VSEL_REG 0x26
+#define BD96801_LDO7_VSEL_REG 0x27
+#define BD96801_BUCK_VSEL_MASK 0x1F
+#define BD96801_LDO_VSEL_MASK 0xff
+
+#define BD96801_MASK_RAMP_DELAY 0xc0
+#define BD96801_INT_VOUT_BASE_REG 0x21
+#define BD96801_BUCK_INT_VOUT_MASK 0xff
+
+#define BD96801_BUCK_VOLTS 256
+#define BD96801_LDO_VOLTS 256
+
+#define BD96801_OVP_MASK 0x03
+#define BD96801_MASK_BUCK1_OVP_SHIFT 0x00
+#define BD96801_MASK_BUCK2_OVP_SHIFT 0x02
+#define BD96801_MASK_BUCK3_OVP_SHIFT 0x04
+#define BD96801_MASK_BUCK4_OVP_SHIFT 0x06
+#define BD96801_MASK_LDO5_OVP_SHIFT 0x00
+#define BD96801_MASK_LDO6_OVP_SHIFT 0x02
+#define BD96801_MASK_LDO7_OVP_SHIFT 0x04
+
+#define BD96801_PROT_LIMIT_OCP_MIN 0x00
+#define BD96801_PROT_LIMIT_LOW 0x01
+#define BD96801_PROT_LIMIT_MID 0x02
+#define BD96801_PROT_LIMIT_HI 0x03
+
+#define BD96801_REG_BUCK1_OCP 0x32
+#define BD96801_REG_BUCK2_OCP 0x32
+#define BD96801_REG_BUCK3_OCP 0x33
+#define BD96801_REG_BUCK4_OCP 0x33
+
+#define BD96801_MASK_BUCK1_OCP_SHIFT 0x00
+#define BD96801_MASK_BUCK2_OCP_SHIFT 0x04
+#define BD96801_MASK_BUCK3_OCP_SHIFT 0x00
+#define BD96801_MASK_BUCK4_OCP_SHIFT 0x04
+
+#define BD96801_REG_LDO5_OCP 0x34
+#define BD96801_REG_LDO6_OCP 0x34
+#define BD96801_REG_LDO7_OCP 0x34
+
+#define BD96801_MASK_LDO5_OCP_SHIFT 0x00
+#define BD96801_MASK_LDO6_OCP_SHIFT 0x02
+#define BD96801_MASK_LDO7_OCP_SHIFT 0x04
+
+#define BD96801_MASK_SHD_INTB BIT(7)
+#define BD96801_INTB_FATAL BIT(7)
+
+#define BD96801_NUM_REGULATORS 7
+#define BD96801_NUM_LDOS 4
+
+/*
+ * Ramp rates for bucks are controlled by bits [7:6] as follows:
+ * 00 => 1 mV/uS
+ * 01 => 5 mV/uS
+ * 10 => 10 mV/uS
+ * 11 => 20 mV/uS
+ */
+static const unsigned int buck_ramp_table[] = { 1000, 5000, 10000, 20000 };
+
+/*
+ * This is a voltage range that get's appended to selected
+ * bd96801_buck_init_volts value. The range from 0x0 to 0xF is actually
+ * bd96801_buck_init_volts + 0 ... bd96801_buck_init_volts + 150mV
+ * and the range from 0x10 to 0x1f is bd96801_buck_init_volts - 150mV ...
+ * bd96801_buck_init_volts - 0. But as the members of linear_range
+ * are all unsigned I will apply offset of -150 mV to value in
+ * linear_range - which should increase these ranges with
+ * 150 mV getting all the values to >= 0.
+ */
+static const struct linear_range bd96801_tune_volts[] = {
+ REGULATOR_LINEAR_RANGE(150000, 0x00, 0xF, 10000),
+ REGULATOR_LINEAR_RANGE(0, 0x10, 0x1F, 10000),
+};
+
+static const struct linear_range bd96801_buck_init_volts[] = {
+ REGULATOR_LINEAR_RANGE(500000 - 150000, 0x00, 0xc8, 5000),
+ REGULATOR_LINEAR_RANGE(1550000 - 150000, 0xc9, 0xec, 50000),
+ REGULATOR_LINEAR_RANGE(3300000 - 150000, 0xed, 0xff, 0),
+};
+
+static const struct linear_range bd96801_ldo_int_volts[] = {
+ REGULATOR_LINEAR_RANGE(300000, 0x00, 0x78, 25000),
+ REGULATOR_LINEAR_RANGE(3300000, 0x79, 0xff, 0),
+};
+
+#define BD96801_LDO_SD_VOLT_MASK 0x1
+#define BD96801_LDO_MODE_MASK 0x6
+#define BD96801_LDO_MODE_INT 0x0
+#define BD96801_LDO_MODE_SD 0x2
+#define BD96801_LDO_MODE_DDR 0x4
+
+static int ldo_ddr_volt_table[] = {500000, 300000};
+static int ldo_sd_volt_table[] = {3300000, 1800000};
+
+/* Constant IRQ initialization data (templates) */
+struct bd96801_irqinfo {
+ int type;
+ struct regulator_irq_desc irq_desc;
+ int err_cfg;
+ int wrn_cfg;
+ const char *irq_name;
+};
+
+#define BD96801_IRQINFO(_type, _name, _irqoff_ms, _irqname) \
+{ \
+ .type = (_type), \
+ .err_cfg = -1, \
+ .wrn_cfg = -1, \
+ .irq_name = (_irqname), \
+ .irq_desc = { \
+ .name = (_name), \
+ .irq_off_ms = (_irqoff_ms), \
+ .map_event = regulator_irq_map_event_simple, \
+ }, \
+}
+
+static const struct bd96801_irqinfo buck1_irqinfo[] = {
+ BD96801_IRQINFO(BD96801_PROT_OCP, "buck1-over-curr-h", 500,
+ "bd96801-buck1-overcurr-h"),
+ BD96801_IRQINFO(BD96801_PROT_OCP, "buck1-over-curr-l", 500,
+ "bd96801-buck1-overcurr-l"),
+ BD96801_IRQINFO(BD96801_PROT_OCP, "buck1-over-curr-n", 500,
+ "bd96801-buck1-overcurr-n"),
+ BD96801_IRQINFO(BD96801_PROT_OVP, "buck1-over-voltage", 500,
+ "bd96801-buck1-overvolt"),
+ BD96801_IRQINFO(BD96801_PROT_UVP, "buck1-under-voltage", 500,
+ "bd96801-buck1-undervolt"),
+ BD96801_IRQINFO(BD96801_PROT_TEMP, "buck1-over-temp", 500,
+ "bd96801-buck1-thermal")
+};
+
+static const struct bd96801_irqinfo buck2_irqinfo[] = {
+ BD96801_IRQINFO(BD96801_PROT_OCP, "buck2-over-curr-h", 500,
+ "bd96801-buck2-overcurr-h"),
+ BD96801_IRQINFO(BD96801_PROT_OCP, "buck2-over-curr-l", 500,
+ "bd96801-buck2-overcurr-l"),
+ BD96801_IRQINFO(BD96801_PROT_OCP, "buck2-over-curr-n", 500,
+ "bd96801-buck2-overcurr-n"),
+ BD96801_IRQINFO(BD96801_PROT_OVP, "buck2-over-voltage", 500,
+ "bd96801-buck2-overvolt"),
+ BD96801_IRQINFO(BD96801_PROT_UVP, "buck2-under-voltage", 500,
+ "bd96801-buck2-undervolt"),
+ BD96801_IRQINFO(BD96801_PROT_TEMP, "buck2-over-temp", 500,
+ "bd96801-buck2-thermal")
+};
+
+static const struct bd96801_irqinfo buck3_irqinfo[] = {
+ BD96801_IRQINFO(BD96801_PROT_OCP, "buck3-over-curr-h", 500,
+ "bd96801-buck3-overcurr-h"),
+ BD96801_IRQINFO(BD96801_PROT_OCP, "buck3-over-curr-l", 500,
+ "bd96801-buck3-overcurr-l"),
+ BD96801_IRQINFO(BD96801_PROT_OCP, "buck3-over-curr-n", 500,
+ "bd96801-buck3-overcurr-n"),
+ BD96801_IRQINFO(BD96801_PROT_OVP, "buck3-over-voltage", 500,
+ "bd96801-buck3-overvolt"),
+ BD96801_IRQINFO(BD96801_PROT_UVP, "buck3-under-voltage", 500,
+ "bd96801-buck3-undervolt"),
+ BD96801_IRQINFO(BD96801_PROT_TEMP, "buck3-over-temp", 500,
+ "bd96801-buck3-thermal")
+};
+
+static const struct bd96801_irqinfo buck4_irqinfo[] = {
+ BD96801_IRQINFO(BD96801_PROT_OCP, "buck4-over-curr-h", 500,
+ "bd96801-buck4-overcurr-h"),
+ BD96801_IRQINFO(BD96801_PROT_OCP, "buck4-over-curr-l", 500,
+ "bd96801-buck4-overcurr-l"),
+ BD96801_IRQINFO(BD96801_PROT_OCP, "buck4-over-curr-n", 500,
+ "bd96801-buck4-overcurr-n"),
+ BD96801_IRQINFO(BD96801_PROT_OVP, "buck4-over-voltage", 500,
+ "bd96801-buck4-overvolt"),
+ BD96801_IRQINFO(BD96801_PROT_UVP, "buck4-under-voltage", 500,
+ "bd96801-buck4-undervolt"),
+ BD96801_IRQINFO(BD96801_PROT_TEMP, "buck4-over-temp", 500,
+ "bd96801-buck4-thermal")
+};
+
+static const struct bd96801_irqinfo ldo5_irqinfo[] = {
+ BD96801_IRQINFO(BD96801_PROT_OCP, "ldo5-overcurr", 500,
+ "bd96801-ldo5-overcurr"),
+ BD96801_IRQINFO(BD96801_PROT_OVP, "ldo5-over-voltage", 500,
+ "bd96801-ldo5-overvolt"),
+ BD96801_IRQINFO(BD96801_PROT_UVP, "ldo5-under-voltage", 500,
+ "bd96801-ldo5-undervolt"),
+};
+
+static const struct bd96801_irqinfo ldo6_irqinfo[] = {
+ BD96801_IRQINFO(BD96801_PROT_OCP, "ldo6-overcurr", 500,
+ "bd96801-ldo6-overcurr"),
+ BD96801_IRQINFO(BD96801_PROT_OVP, "ldo6-over-voltage", 500,
+ "bd96801-ldo6-overvolt"),
+ BD96801_IRQINFO(BD96801_PROT_UVP, "ldo6-under-voltage", 500,
+ "bd96801-ldo6-undervolt"),
+};
+
+static const struct bd96801_irqinfo ldo7_irqinfo[] = {
+ BD96801_IRQINFO(BD96801_PROT_OCP, "ldo7-overcurr", 500,
+ "bd96801-ldo7-overcurr"),
+ BD96801_IRQINFO(BD96801_PROT_OVP, "ldo7-over-voltage", 500,
+ "bd96801-ldo7-overvolt"),
+ BD96801_IRQINFO(BD96801_PROT_UVP, "ldo7-under-voltage", 500,
+ "bd96801-ldo7-undervolt"),
+};
+
+struct bd96801_irq_desc {
+ struct bd96801_irqinfo *irqinfo;
+ int num_irqs;
+};
+
+struct bd96801_regulator_data {
+ struct regulator_desc desc;
+ const struct linear_range *init_ranges;
+ int num_ranges;
+ struct bd96801_irq_desc irq_desc;
+ int initial_voltage;
+ int ldo_vol_lvl;
+ int ldo_errs;
+};
+
+struct bd96801_pmic_data {
+ struct bd96801_regulator_data regulator_data[BD96801_NUM_REGULATORS];
+ struct regmap *regmap;
+ int fatal_ind;
+};
+
+static int ldo_map_notif(int irq, struct regulator_irq_data *rid,
+ unsigned long *dev_mask)
+{
+ int i;
+
+ for (i = 0; i < rid->num_states; i++) {
+ struct bd96801_regulator_data *rdata;
+ struct regulator_dev *rdev;
+
+ rdev = rid->states[i].rdev;
+ rdata = container_of(rdev->desc, struct bd96801_regulator_data,
+ desc);
+ rid->states[i].notifs = regulator_err2notif(rdata->ldo_errs);
+ rid->states[i].errors = rdata->ldo_errs;
+ *dev_mask |= BIT(i);
+ }
+ return 0;
+}
+
+static int bd96801_list_voltage_lr(struct regulator_dev *rdev,
+ unsigned int selector)
+{
+ int voltage;
+ struct bd96801_regulator_data *data;
+
+ data = container_of(rdev->desc, struct bd96801_regulator_data, desc);
+
+ /*
+ * The BD096801 has voltage setting in two registers. One giving the
+ * "initial voltage" (can be changed only when regulator is disabled.
+ * This driver caches the value and sets it only at startup. The other
+ * register is voltage tuning value which applies -150 mV ... +150 mV
+ * offset to the voltage.
+ *
+ * Note that the cached initial voltage stored in regulator data is
+ * 'scaled down' by the 150 mV so that all of our tuning values are
+ * >= 0. This is done because the linear_ranges uses unsigned values.
+ *
+ * As a result, we increase the tuning voltage which we get based on
+ * the selector by the stored initial_voltage.
+ */
+ voltage = regulator_list_voltage_linear_range(rdev, selector);
+ if (voltage < 0)
+ return voltage;
+
+ return voltage + data->initial_voltage;
+}
+
+
+static const struct regulator_ops bd96801_ldo_table_ops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .list_voltage = regulator_list_voltage_table,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+};
+
+static const struct regulator_ops bd96801_buck_ops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .list_voltage = bd96801_list_voltage_lr,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .set_ramp_delay = regulator_set_ramp_delay_regmap,
+};
+
+static const struct regulator_ops bd96801_ldo_ops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .list_voltage = regulator_list_voltage_linear_range,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+};
+
+static int buck_get_initial_voltage(struct regmap *regmap, struct device *dev,
+ struct bd96801_regulator_data *data)
+{
+ int ret = 0, sel, initial_uv;
+ int reg = BD96801_INT_VOUT_BASE_REG + data->desc.id;
+
+ if (data->num_ranges) {
+ ret = regmap_read(regmap, reg, &sel);
+ sel &= BD96801_BUCK_INT_VOUT_MASK;
+
+ ret = linear_range_get_value_array(data->init_ranges,
+ data->num_ranges, sel,
+ &initial_uv);
+ if (ret)
+ return ret;
+
+ data->initial_voltage = initial_uv;
+ dev_dbg(dev, "Tune-scaled initial voltage %u\n",
+ data->initial_voltage);
+ }
+
+ return 0;
+}
+
+static int get_ldo_initial_voltage(struct regmap *regmap,
+ struct device *dev,
+ struct bd96801_regulator_data *data)
+{
+ int ret;
+ int cfgreg;
+
+ ret = regmap_read(regmap, data->ldo_vol_lvl, &cfgreg);
+ if (ret)
+ return ret;
+
+ switch (cfgreg & BD96801_LDO_MODE_MASK) {
+ case BD96801_LDO_MODE_DDR:
+ data->desc.volt_table = ldo_ddr_volt_table;
+ data->desc.n_voltages = ARRAY_SIZE(ldo_ddr_volt_table);
+ break;
+ case BD96801_LDO_MODE_SD:
+ data->desc.volt_table = ldo_sd_volt_table;
+ data->desc.n_voltages = ARRAY_SIZE(ldo_sd_volt_table);
+ break;
+ default:
+ dev_info(dev, "Leaving LDO to normal mode");
+ return 0;
+ }
+
+ /* SD or DDR mode => override default ops */
+ data->desc.ops = &bd96801_ldo_table_ops,
+ data->desc.vsel_mask = 1;
+ data->desc.vsel_reg = data->ldo_vol_lvl;
+
+ return 0;
+}
+
+static int get_initial_voltage(struct device *dev, struct regmap *regmap,
+ struct bd96801_regulator_data *data)
+{
+ /* BUCK */
+ if (data->desc.id <= BD96801_BUCK4)
+ return buck_get_initial_voltage(regmap, dev, data);
+
+ /* LDO */
+ return get_ldo_initial_voltage(regmap, dev, data);
+}
+
+static int bd96801_walk_regulator_dt(struct device *dev, struct regmap *regmap,
+ struct bd96801_regulator_data *data,
+ int num)
+{
+ int i, ret;
+ struct device_node *np;
+ struct device_node *nproot = dev->parent->of_node;
+
+ nproot = of_get_child_by_name(nproot, "regulators");
+ if (!nproot) {
+ dev_err(dev, "failed to find regulators node\n");
+ return -ENODEV;
+ }
+ for_each_child_of_node(nproot, np)
+ for (i = 0; i < num; i++) {
+ if (!of_node_name_eq(np, data[i].desc.of_match))
+ continue;
+ /*
+ * If STBY configs are supported, we must pass node
+ * here to extract the initial voltages from the DT.
+ * Thus we do the initial voltage getting in this
+ * loop.
+ */
+ ret = get_initial_voltage(dev, regmap, &data[i]);
+ if (ret) {
+ dev_err(dev,
+ "Initializing voltages for %s failed\n",
+ data[i].desc.name);
+ of_node_put(np);
+ of_node_put(nproot);
+
+ return ret;
+ }
+ if (of_property_read_bool(np, "rohm,keep-on-stby")) {
+ ret = regmap_set_bits(regmap,
+ BD96801_ALWAYS_ON_REG,
+ 1 << data[i].desc.id);
+ if (ret) {
+ dev_err(dev,
+ "failed to set %s on-at-stby\n",
+ data[i].desc.name);
+ of_node_put(np);
+ of_node_put(nproot);
+
+ return ret;
+ }
+ }
+ }
+ of_node_put(nproot);
+
+ return 0;
+}
+
+/*
+ * Template for regulator data. Probe will allocate dynamic / driver instance
+ * struct so we should be on a safe side even if there were multiple PMICs to
+ * control. Note that there is a plan to allow multiple PMICs to be used so
+ * systems can scale better. I am however still slightly unsure how the
+ * multi-PMIC case will be handled. I don't know if the processor will have I2C
+ * acces to all of the PMICs or only the first one. I'd guess there will be
+ * access provided to all PMICs for voltage scaling - but the errors will only
+ * be informed via the master PMIC. Eg, we should prepare to support multiple
+ * driver instances - either with or without the IRQs... Well, let's first
+ * just support the simple and clear single-PMIC setup and ponder the multi PMIC
+ * case later. What we can easly do for preparing is to not use static global
+ * data for regulators though.
+ */
+static const struct bd96801_pmic_data bd96801_data = {
+ .regulator_data = {
+ {
+ .desc = {
+ .name = "buck1",
+ .of_match = of_match_ptr("buck1"),
+ .regulators_node = of_match_ptr("regulators"),
+ .id = BD96801_BUCK1,
+ .ops = &bd96801_buck_ops,
+ .type = REGULATOR_VOLTAGE,
+ .linear_ranges = bd96801_tune_volts,
+ .n_linear_ranges = ARRAY_SIZE(bd96801_tune_volts),
+ .n_voltages = BD96801_BUCK_VOLTS,
+ .enable_reg = BD96801_REG_ENABLE,
+ .enable_mask = BD96801_BUCK1_EN_MASK,
+ .enable_is_inverted = true,
+ .vsel_reg = BD96801_BUCK1_VSEL_REG,
+ .vsel_mask = BD96801_BUCK_VSEL_MASK,
+ .ramp_reg = BD96801_BUCK1_VSEL_REG,
+ .ramp_mask = BD96801_MASK_RAMP_DELAY,
+ .ramp_delay_table = &buck_ramp_table[0],
+ .n_ramp_values = ARRAY_SIZE(buck_ramp_table),
+ .owner = THIS_MODULE,
+ },
+ .init_ranges = bd96801_buck_init_volts,
+ .num_ranges = ARRAY_SIZE(bd96801_buck_init_volts),
+ .irq_desc = {
+ .irqinfo = (struct bd96801_irqinfo *)&buck1_irqinfo[0],
+ .num_irqs = ARRAY_SIZE(buck1_irqinfo),
+ },
+ }, {
+ .desc = {
+ .name = "buck2",
+ .of_match = of_match_ptr("buck2"),
+ .regulators_node = of_match_ptr("regulators"),
+ .id = BD96801_BUCK2,
+ .ops = &bd96801_buck_ops,
+ .type = REGULATOR_VOLTAGE,
+ .linear_ranges = bd96801_tune_volts,
+ .n_linear_ranges = ARRAY_SIZE(bd96801_tune_volts),
+ .n_voltages = BD96801_BUCK_VOLTS,
+ .enable_reg = BD96801_REG_ENABLE,
+ .enable_mask = BD96801_BUCK2_EN_MASK,
+ .enable_is_inverted = true,
+ .vsel_reg = BD96801_BUCK2_VSEL_REG,
+ .vsel_mask = BD96801_BUCK_VSEL_MASK,
+ .ramp_reg = BD96801_BUCK2_VSEL_REG,
+ .ramp_mask = BD96801_MASK_RAMP_DELAY,
+ .ramp_delay_table = &buck_ramp_table[0],
+ .n_ramp_values = ARRAY_SIZE(buck_ramp_table),
+ .owner = THIS_MODULE,
+ },
+ .irq_desc = {
+ .irqinfo = (struct bd96801_irqinfo *)&buck2_irqinfo[0],
+ .num_irqs = ARRAY_SIZE(buck2_irqinfo),
+ },
+ .init_ranges = bd96801_buck_init_volts,
+ .num_ranges = ARRAY_SIZE(bd96801_buck_init_volts),
+ }, {
+ .desc = {
+ .name = "buck3",
+ .of_match = of_match_ptr("buck3"),
+ .regulators_node = of_match_ptr("regulators"),
+ .id = BD96801_BUCK3,
+ .ops = &bd96801_buck_ops,
+ .type = REGULATOR_VOLTAGE,
+ .linear_ranges = bd96801_tune_volts,
+ .n_linear_ranges = ARRAY_SIZE(bd96801_tune_volts),
+ .n_voltages = BD96801_BUCK_VOLTS,
+ .enable_reg = BD96801_REG_ENABLE,
+ .enable_mask = BD96801_BUCK3_EN_MASK,
+ .enable_is_inverted = true,
+ .vsel_reg = BD96801_BUCK3_VSEL_REG,
+ .vsel_mask = BD96801_BUCK_VSEL_MASK,
+ .ramp_reg = BD96801_BUCK3_VSEL_REG,
+ .ramp_mask = BD96801_MASK_RAMP_DELAY,
+ .ramp_delay_table = &buck_ramp_table[0],
+ .n_ramp_values = ARRAY_SIZE(buck_ramp_table),
+ .owner = THIS_MODULE,
+ },
+ .irq_desc = {
+ .irqinfo = (struct bd96801_irqinfo *)&buck3_irqinfo[0],
+ .num_irqs = ARRAY_SIZE(buck3_irqinfo),
+ },
+ .init_ranges = bd96801_buck_init_volts,
+ .num_ranges = ARRAY_SIZE(bd96801_buck_init_volts),
+ }, {
+ .desc = {
+ .name = "buck4",
+ .of_match = of_match_ptr("buck4"),
+ .regulators_node = of_match_ptr("regulators"),
+ .id = BD96801_BUCK4,
+ .ops = &bd96801_buck_ops,
+ .type = REGULATOR_VOLTAGE,
+ .linear_ranges = bd96801_tune_volts,
+ .n_linear_ranges = ARRAY_SIZE(bd96801_tune_volts),
+ .n_voltages = BD96801_BUCK_VOLTS,
+ .enable_reg = BD96801_REG_ENABLE,
+ .enable_mask = BD96801_BUCK4_EN_MASK,
+ .enable_is_inverted = true,
+ .vsel_reg = BD96801_BUCK4_VSEL_REG,
+ .vsel_mask = BD96801_BUCK_VSEL_MASK,
+ .ramp_reg = BD96801_BUCK4_VSEL_REG,
+ .ramp_mask = BD96801_MASK_RAMP_DELAY,
+ .ramp_delay_table = &buck_ramp_table[0],
+ .n_ramp_values = ARRAY_SIZE(buck_ramp_table),
+ .owner = THIS_MODULE,
+ },
+ .irq_desc = {
+ .irqinfo = (struct bd96801_irqinfo *)&buck4_irqinfo[0],
+ .num_irqs = ARRAY_SIZE(buck4_irqinfo),
+ },
+ .init_ranges = bd96801_buck_init_volts,
+ .num_ranges = ARRAY_SIZE(bd96801_buck_init_volts),
+ }, {
+ .desc = {
+ .name = "ldo5",
+ .of_match = of_match_ptr("ldo5"),
+ .regulators_node = of_match_ptr("regulators"),
+ .id = BD96801_LDO5,
+ .ops = &bd96801_ldo_ops,
+ .type = REGULATOR_VOLTAGE,
+ .linear_ranges = bd96801_ldo_int_volts,
+ .n_linear_ranges = ARRAY_SIZE(bd96801_ldo_int_volts),
+ .n_voltages = BD96801_LDO_VOLTS,
+ .enable_reg = BD96801_REG_ENABLE,
+ .enable_mask = BD96801_LDO5_EN_MASK,
+ .enable_is_inverted = true,
+ .vsel_reg = BD96801_LDO5_VSEL_REG,
+ .vsel_mask = BD96801_LDO_VSEL_MASK,
+ .owner = THIS_MODULE,
+ },
+ .irq_desc = {
+ .irqinfo = (struct bd96801_irqinfo *)&ldo5_irqinfo[0],
+ .num_irqs = ARRAY_SIZE(ldo5_irqinfo),
+ },
+ .ldo_vol_lvl = BD96801_LDO5_VOL_LVL_REG,
+ }, {
+ .desc = {
+ .name = "ldo6",
+ .of_match = of_match_ptr("ldo6"),
+ .regulators_node = of_match_ptr("regulators"),
+ .id = BD96801_LDO6,
+ .ops = &bd96801_ldo_ops,
+ .type = REGULATOR_VOLTAGE,
+ .linear_ranges = bd96801_ldo_int_volts,
+ .n_linear_ranges = ARRAY_SIZE(bd96801_ldo_int_volts),
+ .n_voltages = BD96801_LDO_VOLTS,
+ .enable_reg = BD96801_REG_ENABLE,
+ .enable_mask = BD96801_LDO6_EN_MASK,
+ .enable_is_inverted = true,
+ .vsel_reg = BD96801_LDO6_VSEL_REG,
+ .vsel_mask = BD96801_LDO_VSEL_MASK,
+ .owner = THIS_MODULE,
+ },
+ .irq_desc = {
+ .irqinfo = (struct bd96801_irqinfo *)&ldo6_irqinfo[0],
+ .num_irqs = ARRAY_SIZE(ldo6_irqinfo),
+ },
+ .ldo_vol_lvl = BD96801_LDO6_VOL_LVL_REG,
+ }, {
+ .desc = {
+ .name = "ldo7",
+ .of_match = of_match_ptr("ldo7"),
+ .regulators_node = of_match_ptr("regulators"),
+ .id = BD96801_LDO7,
+ .ops = &bd96801_ldo_ops,
+ .type = REGULATOR_VOLTAGE,
+ .linear_ranges = bd96801_ldo_int_volts,
+ .n_linear_ranges = ARRAY_SIZE(bd96801_ldo_int_volts),
+ .n_voltages = BD96801_LDO_VOLTS,
+ .enable_reg = BD96801_REG_ENABLE,
+ .enable_mask = BD96801_LDO7_EN_MASK,
+ .enable_is_inverted = true,
+ .vsel_reg = BD96801_LDO7_VSEL_REG,
+ .vsel_mask = BD96801_LDO_VSEL_MASK,
+ .owner = THIS_MODULE,
+ },
+ .irq_desc = {
+ .irqinfo = (struct bd96801_irqinfo *)&ldo7_irqinfo[0],
+ .num_irqs = ARRAY_SIZE(ldo7_irqinfo),
+ },
+ .ldo_vol_lvl = BD96801_LDO7_VOL_LVL_REG,
+ },
+ },
+};
+
+static int initialize_pmic_data(struct device *dev,
+ struct bd96801_pmic_data *pdata)
+{
+ int r, i;
+
+ /*
+ * Allocate and initialize IRQ data for all of the regulators. We
+ * wish to modify IRQ information independently for each driver
+ * instance.
+ */
+ for (r = 0; r < BD96801_NUM_REGULATORS; r++) {
+ const struct bd96801_irqinfo *template;
+ struct bd96801_irqinfo *new;
+ int num_infos;
+
+ template = pdata->regulator_data[r].irq_desc.irqinfo;
+ num_infos = pdata->regulator_data[r].irq_desc.num_irqs;
+
+ new = devm_kcalloc(dev, num_infos, sizeof(*new), GFP_KERNEL);
+ if (!new)
+ return -ENOMEM;
+
+ pdata->regulator_data[r].irq_desc.irqinfo = new;
+
+ for (i = 0; i < num_infos; i++)
+ new[i] = template[i];
+ }
+
+ return 0;
+}
+
+static int bd96801_rdev_intb_irqs(struct platform_device *pdev,
+ struct bd96801_pmic_data *pdata,
+ struct bd96801_irqinfo *iinfo,
+ struct regulator_dev *rdev)
+{
+ struct regulator_dev *rdev_arr[1];
+ void *retp;
+ int err = 0;
+ int irq;
+ int err_flags[] = {
+ [BD96801_PROT_OVP] = REGULATOR_ERROR_REGULATION_OUT,
+ [BD96801_PROT_UVP] = REGULATOR_ERROR_UNDER_VOLTAGE,
+ [BD96801_PROT_OCP] = REGULATOR_ERROR_OVER_CURRENT,
+ [BD96801_PROT_TEMP] = REGULATOR_ERROR_OVER_TEMP,
+
+ };
+ int wrn_flags[] = {
+ [BD96801_PROT_OVP] = REGULATOR_ERROR_OVER_VOLTAGE_WARN,
+ [BD96801_PROT_UVP] = REGULATOR_ERROR_UNDER_VOLTAGE_WARN,
+ [BD96801_PROT_OCP] = REGULATOR_ERROR_OVER_CURRENT_WARN,
+ [BD96801_PROT_TEMP] = REGULATOR_ERROR_OVER_TEMP_WARN,
+ };
+
+ /*
+ * Don't install IRQ handler if both error and warning
+ * notifications are explicitly disabled
+ */
+ if (!iinfo->err_cfg && !iinfo->wrn_cfg)
+ return 0;
+
+ if (WARN_ON(iinfo->type >= BD96801_NUM_PROT))
+ return -EINVAL;
+
+ if (iinfo->err_cfg)
+ err = err_flags[iinfo->type];
+ else if (iinfo->wrn_cfg)
+ err = wrn_flags[iinfo->type];
+
+ iinfo->irq_desc.data = pdata;
+ irq = platform_get_irq_byname(pdev, iinfo->irq_name);
+ if (irq < 0)
+ return irq;
+ /* Find notifications for this IRQ (WARN/ERR) */
+
+ rdev_arr[0] = rdev;
+ retp = devm_regulator_irq_helper(&pdev->dev,
+ &iinfo->irq_desc, irq,
+ 0, err, NULL, rdev_arr,
+ 1);
+ if (IS_ERR(retp))
+ return PTR_ERR(retp);
+
+ return 0;
+}
+
+
+
+static int bd96801_probe(struct platform_device *pdev)
+{
+ struct regulator_dev *ldo_errs_rdev_arr[BD96801_NUM_LDOS];
+ struct bd96801_regulator_data *rdesc;
+ struct regulator_config config = {};
+ int ldo_errs_arr[BD96801_NUM_LDOS];
+ struct bd96801_pmic_data *pdata;
+ int temp_notif_ldos = 0;
+ struct device *parent;
+ int i, ret;
+ void *retp;
+
+ parent = pdev->dev.parent;
+
+ pdata = devm_kmemdup(&pdev->dev, &bd96801_data, sizeof(bd96801_data),
+ GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+
+ if (initialize_pmic_data(&pdev->dev, pdata))
+ return -ENOMEM;
+
+ pdata->regmap = dev_get_regmap(parent, NULL);
+ if (!pdata->regmap) {
+ dev_err(&pdev->dev, "No register map found\n");
+ return -ENODEV;
+ }
+
+ rdesc = &pdata->regulator_data[0];
+
+ config.driver_data = pdata;
+ config.regmap = pdata->regmap;
+ config.dev = parent;
+
+ ret = bd96801_walk_regulator_dt(&pdev->dev, pdata->regmap, rdesc,
+ BD96801_NUM_REGULATORS);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < ARRAY_SIZE(pdata->regulator_data); i++) {
+ struct regulator_dev *rdev;
+ struct bd96801_irq_desc *idesc = &rdesc[i].irq_desc;
+ int j;
+
+ rdev = devm_regulator_register(&pdev->dev,
+ &rdesc[i].desc, &config);
+ if (IS_ERR(rdev)) {
+ dev_err(&pdev->dev,
+ "failed to register %s regulator\n",
+ rdesc[i].desc.name);
+ return PTR_ERR(rdev);
+ }
+ /*
+ * LDOs don't have own temperature monitoring. If temperature
+ * notification was requested for this LDO from DT then we will
+ * add the regulator to be notified if central IC temperature
+ * exceeds threshold.
+ */
+ if (rdesc[i].ldo_errs) {
+ ldo_errs_rdev_arr[temp_notif_ldos] = rdev;
+ ldo_errs_arr[temp_notif_ldos] = rdesc[i].ldo_errs;
+ temp_notif_ldos++;
+ }
+ if (!idesc)
+ continue;
+
+ /* Register INTB handlers for configured protections */
+ for (j = 0; j < idesc->num_irqs; j++) {
+ ret = bd96801_rdev_intb_irqs(pdev, pdata,
+ &idesc->irqinfo[j], rdev);
+ if (ret)
+ return ret;
+ }
+ }
+ if (temp_notif_ldos) {
+ int irq;
+ struct regulator_irq_desc tw_desc = {
+ .name = "bd96801-core-thermal",
+ .irq_off_ms = 500,
+ .map_event = ldo_map_notif,
+ };
+
+ irq = platform_get_irq_byname(pdev, "bd96801-core-thermal");
+ if (irq < 0)
+ return irq;
+
+ retp = devm_regulator_irq_helper(&pdev->dev, &tw_desc, irq, 0,
+ 0, &ldo_errs_arr[0],
+ &ldo_errs_rdev_arr[0],
+ temp_notif_ldos);
+ if (IS_ERR(retp))
+ return PTR_ERR(retp);
+ }
+
+ return 0;
+}
+
+static const struct platform_device_id bd96801_pmic_id[] = {
+ { "bd96801-regulator", },
+ { }
+};
+MODULE_DEVICE_TABLE(platform, bd96801_pmic_id);
+
+static struct platform_driver bd96801_regulator = {
+ .driver = {
+ .name = "bd96801-pmic"
+ },
+ .probe = bd96801_probe,
+ .id_table = bd96801_pmic_id,
+};
+
+module_platform_driver(bd96801_regulator);
+
+MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
+MODULE_DESCRIPTION("BD96801 voltage regulator driver");
+MODULE_LICENSE("GPL");