From patchwork Tue Jan 17 10:08:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nikita Shubin X-Patchwork-Id: 644760 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A4E10C63797 for ; Tue, 17 Jan 2023 10:15:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235462AbjAQKPz (ORCPT ); Tue, 17 Jan 2023 05:15:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57592 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236241AbjAQKPx (ORCPT ); Tue, 17 Jan 2023 05:15:53 -0500 Received: from forward107p.mail.yandex.net (forward107p.mail.yandex.net [77.88.28.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6BC5823C51; Tue, 17 Jan 2023 02:15:51 -0800 (PST) Received: from sas1-71299a9d5a62.qloud-c.yandex.net (sas1-71299a9d5a62.qloud-c.yandex.net [IPv6:2a02:6b8:c08:210e:0:640:7129:9a9d]) by forward107p.mail.yandex.net (Yandex) with ESMTP id 783C3556F988; Tue, 17 Jan 2023 13:08:54 +0300 (MSK) Received: by sas1-71299a9d5a62.qloud-c.yandex.net (smtp/Yandex) with ESMTPSA id q8hUV81caqM1-n7SNlFtU; Tue, 17 Jan 2023 13:08:53 +0300 X-Yandex-Fwd: 1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=maquefel.me; s=mail; t=1673950133; bh=CJ+Ih42Nh3DFn5GSSIKjLD0V4FznmfM+CB42Baz4ZZs=; h=Message-Id:Date:Cc:Subject:To:From; b=Wd9fdE9odsrW40mWeNPQ55tEnzd31nEZbeE2HirOUCd5zLSrUIXRzx5d0u/dhR1kA c22vveMc75GCIJuUndunnctaU5ZpI1y3nAzen1nMQqK9hnDR4x6UR7LPfUGJUb/iXx tH/a+zMuG/l9zOnRFGtH/IDBnndSajSO7CUOXiGo= Authentication-Results: sas1-71299a9d5a62.qloud-c.yandex.net; dkim=pass header.i=@maquefel.me From: Nikita Shubin To: linux-gpio@vger.kernel.org Cc: Nikita Shubin , Linus Walleij , Hartley Sweeten , Alexander Sverdlin , Russell King , Lukasz Majewski , Bartosz Golaszewski , Arnd Bergmann , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] gpio: ep93xx: convert driver to DT Date: Tue, 17 Jan 2023 13:08:43 +0300 Message-Id: <20230117100845.16708-1-nikita.shubin@maquefel.me> X-Mailer: git-send-email 2.37.4 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org This converts ep93xx SOC gpio into device tree driver: - dropped banks and legacy defines - split AB IRQ and make it shared We are relying on IRQ number information A, B ports have single shared IRQ, while F port have dedicated IRQ for each line. Also we had to split single ep93xx platform_device into multiple, one for each port, without this we can't do a full working transition from legacy platform code into device tree capable: - all GPIO_LOOKUP were change to match new chip namings - add lookup table for leds Fixes: 482c27273f52 ("ARM: ep93xx: renumber interrupts") Signed-off-by: Nikita Shubin Reviewed-by: Linus Walleij --- rfc->v0 Linus Walleij: - dropped chip-labels - rebase on the top of your leds patch: https://lore.kernel.org/linux-arm-kernel/20230111132210.134478-1-linus.walleij@linaro.org/T/ - i am converting to immutable after this patch, otherwise it will require a fix wich is very similiar to this patch Hope changes are not that significant so i can still apply Rb tag. --- arch/arm/mach-ep93xx/core.c | 129 +++++++++- arch/arm/mach-ep93xx/edb93xx.c | 2 +- arch/arm/mach-ep93xx/simone.c | 4 +- arch/arm/mach-ep93xx/ts72xx.c | 4 +- arch/arm/mach-ep93xx/vision_ep9307.c | 10 +- drivers/gpio/gpio-ep93xx.c | 350 +++++++++++---------------- 6 files changed, 265 insertions(+), 234 deletions(-) diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c index 71b113976420..5a01ed342680 100644 --- a/arch/arm/mach-ep93xx/core.c +++ b/arch/arm/mach-ep93xx/core.c @@ -35,6 +35,7 @@ #include #include #include +#include #include "hardware.h" #include @@ -139,9 +140,80 @@ EXPORT_SYMBOL_GPL(ep93xx_chip_revision); /************************************************************************* * EP93xx GPIO *************************************************************************/ -static struct resource ep93xx_gpio_resource[] = { - DEFINE_RES_MEM(EP93XX_GPIO_PHYS_BASE, 0xcc), +/* port A */ +static struct resource ep93xx_a_gpio_resources[] = { + DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE, 0x04, "data"), + DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x10, 0x04, "dir"), + DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x90, 0x1c, "intr"), DEFINE_RES_IRQ(IRQ_EP93XX_GPIO_AB), +}; + +static struct platform_device ep93xx_a_gpio = { + .name = "gpio-ep93xx", + .id = 0, + .num_resources = ARRAY_SIZE(ep93xx_a_gpio_resources), + .resource = ep93xx_a_gpio_resources, +}; + +/* port B */ +static struct resource ep93xx_b_gpio_resources[] = { + DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x04, 0x04, "data"), + DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x14, 0x04, "dir"), + DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0xac, 0x1c, "intr"), + DEFINE_RES_IRQ(IRQ_EP93XX_GPIO_AB), +}; + +static struct platform_device ep93xx_b_gpio = { + .name = "gpio-ep93xx", + .id = 1, + .num_resources = ARRAY_SIZE(ep93xx_b_gpio_resources), + .resource = ep93xx_b_gpio_resources, +}; + +/* port C */ +static struct resource ep93xx_c_gpio_resources[] = { + DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x08, 0x04, "data"), + DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x18, 0x04, "dir"), +}; + +static struct platform_device ep93xx_c_gpio = { + .name = "gpio-ep93xx", + .id = 2, + .num_resources = ARRAY_SIZE(ep93xx_c_gpio_resources), + .resource = ep93xx_c_gpio_resources, +}; + +/* port D */ +static struct resource ep93xx_d_gpio_resources[] = { + DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x0c, 0x04, "data"), + DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x1c, 0x04, "dir"), +}; + +static struct platform_device ep93xx_d_gpio = { + .name = "gpio-ep93xx", + .id = 3, + .num_resources = ARRAY_SIZE(ep93xx_d_gpio_resources), + .resource = ep93xx_d_gpio_resources, +}; + +/* port E */ +static struct resource ep93xx_e_gpio_resources[] = { + DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x20, 0x04, "data"), + DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x24, 0x04, "dir"), +}; + +static struct platform_device ep93xx_e_gpio = { + .name = "gpio-ep93xx", + .id = 4, + .num_resources = ARRAY_SIZE(ep93xx_e_gpio_resources), + .resource = ep93xx_e_gpio_resources, +}; + +/* port F */ +static struct resource ep93xx_f_gpio_resources[] = { + DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x30, 0x04, "data"), + DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x34, 0x04, "dir"), + DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x4c, 0x1c, "intr"), DEFINE_RES_IRQ(IRQ_EP93XX_GPIO0MUX), DEFINE_RES_IRQ(IRQ_EP93XX_GPIO1MUX), DEFINE_RES_IRQ(IRQ_EP93XX_GPIO2MUX), @@ -152,11 +224,34 @@ static struct resource ep93xx_gpio_resource[] = { DEFINE_RES_IRQ(IRQ_EP93XX_GPIO7MUX), }; -static struct platform_device ep93xx_gpio_device = { - .name = "gpio-ep93xx", - .id = -1, - .num_resources = ARRAY_SIZE(ep93xx_gpio_resource), - .resource = ep93xx_gpio_resource, +static struct platform_device ep93xx_f_gpio = { + .name = "gpio-ep93xx", + .id = 5, + .num_resources = ARRAY_SIZE(ep93xx_f_gpio_resources), + .resource = ep93xx_f_gpio_resources, +}; + +/* port G */ +static struct resource ep93xx_g_gpio_resources[] = { + DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x38, 0x04, "data"), + DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x3c, 0x04, "dir"), +}; + +static struct platform_device ep93xx_g_gpio = { + .name = "gpio-ep93xx", + .id = 6, + .num_resources = ARRAY_SIZE(ep93xx_g_gpio_resources), + .resource = ep93xx_g_gpio_resources, +}; + +static struct platform_device *ep93xx_gpio_device[] __initdata = { + &ep93xx_a_gpio, + &ep93xx_b_gpio, + &ep93xx_c_gpio, + &ep93xx_d_gpio, + &ep93xx_e_gpio, + &ep93xx_f_gpio, + &ep93xx_g_gpio, }; /************************************************************************* @@ -335,9 +430,9 @@ static struct gpiod_lookup_table ep93xx_i2c_gpiod_table = { .dev_id = "i2c-gpio.0", .table = { /* Use local offsets on gpiochip/port "G" */ - GPIO_LOOKUP_IDX("G", 1, NULL, 0, + GPIO_LOOKUP_IDX("gpio-ep93xx.6", 1, NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), - GPIO_LOOKUP_IDX("G", 0, NULL, 1, + GPIO_LOOKUP_IDX("gpio-ep93xx.6", 0, NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), }, }; @@ -423,6 +518,14 @@ void __init ep93xx_register_spi(struct ep93xx_spi_info *info, /************************************************************************* * EP93xx LEDs *************************************************************************/ +static struct gpiod_lookup_table ep93xx_led_gpiod_table = { + .dev_id = "leds-gpio", + .table = { + GPIO_LOOKUP_IDX("gpio-ep93xx.4", 0, NULL, 0, 0), + GPIO_LOOKUP_IDX("gpio-ep93xx.4", 1, NULL, 1, 0), + }, +}; + static const struct gpio_led ep93xx_led_pins[] __initconst = { { .name = "platform:grled", @@ -440,8 +543,8 @@ static struct gpiod_lookup_table ep93xx_leds_gpio_table = { .dev_id = "leds-gpio", .table = { /* Use local offsets on gpiochip/port "E" */ - GPIO_LOOKUP_IDX("E", 0, NULL, 0, GPIO_ACTIVE_HIGH), - GPIO_LOOKUP_IDX("E", 1, NULL, 1, GPIO_ACTIVE_HIGH), + GPIO_LOOKUP_IDX("gpio-ep93xx.4", 0, NULL, 0, GPIO_ACTIVE_HIGH), + GPIO_LOOKUP_IDX("gpio-ep93xx.4", 1, NULL, 1, GPIO_ACTIVE_HIGH), { } }, }; @@ -974,6 +1077,7 @@ static struct device __init *ep93xx_init_soc(void) struct device __init *ep93xx_init_devices(void) { struct device *parent; + int i; /* Disallow access to MaverickCrunch initially */ ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA); @@ -988,7 +1092,8 @@ struct device __init *ep93xx_init_devices(void) parent = ep93xx_init_soc(); /* Get the GPIO working early, other devices need it */ - platform_device_register(&ep93xx_gpio_device); + for (i = 0; i < ARRAY_SIZE(ep93xx_gpio_device); i++) + platform_device_register(ep93xx_gpio_device[i]); amba_device_register(&uart1_device, &iomem_resource); amba_device_register(&uart2_device, &iomem_resource); diff --git a/arch/arm/mach-ep93xx/edb93xx.c b/arch/arm/mach-ep93xx/edb93xx.c index 4b90899a66e9..c1e880946f72 100644 --- a/arch/arm/mach-ep93xx/edb93xx.c +++ b/arch/arm/mach-ep93xx/edb93xx.c @@ -105,7 +105,7 @@ static struct spi_board_info edb93xx_spi_board_info[] __initdata = { static struct gpiod_lookup_table edb93xx_spi_cs_gpio_table = { .dev_id = "spi0", .table = { - GPIO_LOOKUP("A", 6, "cs", GPIO_ACTIVE_LOW), + GPIO_LOOKUP("gpio-ep93xx.0", 6, "cs", GPIO_ACTIVE_LOW), { }, }, }; diff --git a/arch/arm/mach-ep93xx/simone.c b/arch/arm/mach-ep93xx/simone.c index 569e72413561..ca0c5f18cb64 100644 --- a/arch/arm/mach-ep93xx/simone.c +++ b/arch/arm/mach-ep93xx/simone.c @@ -47,7 +47,7 @@ static struct gpiod_lookup_table simone_mmc_spi_gpio_table = { .dev_id = "mmc_spi.0", /* "mmc_spi" @ CS0 */ .table = { /* Card detect */ - GPIO_LOOKUP_IDX("A", 0, NULL, 0, GPIO_ACTIVE_LOW), + GPIO_LOOKUP_IDX("gpio-ep93xx.0", 0, NULL, 0, GPIO_ACTIVE_LOW), { }, }, }; @@ -75,7 +75,7 @@ static struct spi_board_info simone_spi_devices[] __initdata = { static struct gpiod_lookup_table simone_spi_cs_gpio_table = { .dev_id = "spi0", .table = { - GPIO_LOOKUP("A", 1, "cs", GPIO_ACTIVE_LOW), + GPIO_LOOKUP("gpio-ep93xx.0", 1, "cs", GPIO_ACTIVE_LOW), { }, }, }; diff --git a/arch/arm/mach-ep93xx/ts72xx.c b/arch/arm/mach-ep93xx/ts72xx.c index d3de7283ecb3..0bbdf587c685 100644 --- a/arch/arm/mach-ep93xx/ts72xx.c +++ b/arch/arm/mach-ep93xx/ts72xx.c @@ -268,7 +268,7 @@ static struct spi_board_info bk3_spi_board_info[] __initdata = { static struct gpiod_lookup_table bk3_spi_cs_gpio_table = { .dev_id = "spi0", .table = { - GPIO_LOOKUP("F", 3, "cs", GPIO_ACTIVE_LOW), + GPIO_LOOKUP("gpio-ep93xx.5", 3, "cs", GPIO_ACTIVE_LOW), { }, }, }; @@ -318,7 +318,7 @@ static struct gpiod_lookup_table ts72xx_spi_cs_gpio_table = { .dev_id = "spi0", .table = { /* DIO_17 */ - GPIO_LOOKUP("F", 2, "cs", GPIO_ACTIVE_LOW), + GPIO_LOOKUP("gpio-ep93xx.5", 2, "cs", GPIO_ACTIVE_LOW), { }, }, }; diff --git a/arch/arm/mach-ep93xx/vision_ep9307.c b/arch/arm/mach-ep93xx/vision_ep9307.c index 30d9cf3791eb..020223b0be2b 100644 --- a/arch/arm/mach-ep93xx/vision_ep9307.c +++ b/arch/arm/mach-ep93xx/vision_ep9307.c @@ -206,9 +206,9 @@ static struct gpiod_lookup_table vision_spi_mmc_gpio_table = { .dev_id = "mmc_spi.2", /* "mmc_spi @ CS2 */ .table = { /* Card detect */ - GPIO_LOOKUP_IDX("B", 7, NULL, 0, GPIO_ACTIVE_LOW), + GPIO_LOOKUP_IDX("gpio-ep93xx.1", 7, NULL, 0, GPIO_ACTIVE_LOW), /* Write protect */ - GPIO_LOOKUP_IDX("F", 0, NULL, 1, GPIO_ACTIVE_HIGH), + GPIO_LOOKUP_IDX("gpio-ep93xx.5", 0, NULL, 1, GPIO_ACTIVE_HIGH), { }, }, }; @@ -244,9 +244,9 @@ static struct spi_board_info vision_spi_board_info[] __initdata = { static struct gpiod_lookup_table vision_spi_cs_gpio_table = { .dev_id = "spi0", .table = { - GPIO_LOOKUP_IDX("A", 6, "cs", 0, GPIO_ACTIVE_LOW), - GPIO_LOOKUP_IDX("A", 7, "cs", 1, GPIO_ACTIVE_LOW), - GPIO_LOOKUP_IDX("G", 2, "cs", 2, GPIO_ACTIVE_LOW), + GPIO_LOOKUP_IDX("gpio-ep93xx.0", 6, "cs", 0, GPIO_ACTIVE_LOW), + GPIO_LOOKUP_IDX("gpio-ep93xx.0", 7, "cs", 1, GPIO_ACTIVE_LOW), + GPIO_LOOKUP_IDX("gpio-ep93xx.6", 2, "cs", 2, GPIO_ACTIVE_LOW), { }, }, }; diff --git a/drivers/gpio/gpio-ep93xx.c b/drivers/gpio/gpio-ep93xx.c index 2e1779709113..dff2ce050522 100644 --- a/drivers/gpio/gpio-ep93xx.c +++ b/drivers/gpio/gpio-ep93xx.c @@ -8,7 +8,6 @@ * Based on code originally from: * linux/arch/arm/mach-ep93xx/core.c */ - #include #include #include @@ -17,31 +16,11 @@ #include #include #include - -#define EP93XX_GPIO_F_INT_STATUS 0x5c -#define EP93XX_GPIO_A_INT_STATUS 0xa0 -#define EP93XX_GPIO_B_INT_STATUS 0xbc - -/* Maximum value for gpio line identifiers */ -#define EP93XX_GPIO_LINE_MAX 63 - -/* Number of GPIO chips in EP93XX */ -#define EP93XX_GPIO_CHIP_NUM 8 - -/* Maximum value for irq capable line identifiers */ -#define EP93XX_GPIO_LINE_MAX_IRQ 23 - -#define EP93XX_GPIO_A_IRQ_BASE 64 -#define EP93XX_GPIO_B_IRQ_BASE 72 -/* - * Static mapping of GPIO bank F IRQS: - * F0..F7 (16..24) to irq 80..87. - */ -#define EP93XX_GPIO_F_IRQ_BASE 80 +#include struct ep93xx_gpio_irq_chip { struct irq_chip ic; - u8 irq_offset; + void __iomem *base; u8 int_unmasked; u8 int_enabled; u8 int_type1; @@ -50,15 +29,11 @@ struct ep93xx_gpio_irq_chip { }; struct ep93xx_gpio_chip { + void __iomem *base; struct gpio_chip gc; struct ep93xx_gpio_irq_chip *eic; }; -struct ep93xx_gpio { - void __iomem *base; - struct ep93xx_gpio_chip gc[EP93XX_GPIO_CHIP_NUM]; -}; - #define to_ep93xx_gpio_chip(x) container_of(x, struct ep93xx_gpio_chip, gc) static struct ep93xx_gpio_irq_chip *to_ep93xx_gpio_irq_chip(struct gpio_chip *gc) @@ -79,25 +54,23 @@ static struct ep93xx_gpio_irq_chip *to_ep93xx_gpio_irq_chip(struct gpio_chip *gc #define EP93XX_INT_RAW_STATUS_OFFSET 0x14 #define EP93XX_INT_DEBOUNCE_OFFSET 0x18 -static void ep93xx_gpio_update_int_params(struct ep93xx_gpio *epg, - struct ep93xx_gpio_irq_chip *eic) +static void ep93xx_gpio_update_int_params(struct ep93xx_gpio_irq_chip *eic) { - writeb_relaxed(0, epg->base + eic->irq_offset + EP93XX_INT_EN_OFFSET); + writeb_relaxed(0, eic->base + EP93XX_INT_EN_OFFSET); writeb_relaxed(eic->int_type2, - epg->base + eic->irq_offset + EP93XX_INT_TYPE2_OFFSET); + eic->base + EP93XX_INT_TYPE2_OFFSET); writeb_relaxed(eic->int_type1, - epg->base + eic->irq_offset + EP93XX_INT_TYPE1_OFFSET); + eic->base + EP93XX_INT_TYPE1_OFFSET); - writeb_relaxed(eic->int_unmasked & eic->int_enabled, - epg->base + eic->irq_offset + EP93XX_INT_EN_OFFSET); + writeb(eic->int_unmasked & eic->int_enabled, + eic->base + EP93XX_INT_EN_OFFSET); } static void ep93xx_gpio_int_debounce(struct gpio_chip *gc, unsigned int offset, bool enable) { - struct ep93xx_gpio *epg = gpiochip_get_data(gc); struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc); int port_mask = BIT(offset); @@ -107,52 +80,44 @@ static void ep93xx_gpio_int_debounce(struct gpio_chip *gc, eic->int_debounce &= ~port_mask; writeb(eic->int_debounce, - epg->base + eic->irq_offset + EP93XX_INT_DEBOUNCE_OFFSET); + eic->base + EP93XX_INT_DEBOUNCE_OFFSET); } -static void ep93xx_gpio_ab_irq_handler(struct irq_desc *desc) +static u32 ep93xx_gpio_ab_irq_handler(struct gpio_chip *gc) { - struct gpio_chip *gc = irq_desc_get_handler_data(desc); - struct ep93xx_gpio *epg = gpiochip_get_data(gc); - struct irq_chip *irqchip = irq_desc_get_chip(desc); + struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc); unsigned long stat; int offset; - chained_irq_enter(irqchip, desc); + stat = readb(eic->base + EP93XX_INT_STATUS_OFFSET); - /* - * Dispatch the IRQs to the irqdomain of each A and B - * gpiochip irqdomains depending on what has fired. - * The tricky part is that the IRQ line is shared - * between bank A and B and each has their own gpiochip. - */ - stat = readb(epg->base + EP93XX_GPIO_A_INT_STATUS); for_each_set_bit(offset, &stat, 8) - generic_handle_domain_irq(epg->gc[0].gc.irq.domain, - offset); + generic_handle_domain_irq(gc->irq.domain, offset); - stat = readb(epg->base + EP93XX_GPIO_B_INT_STATUS); - for_each_set_bit(offset, &stat, 8) - generic_handle_domain_irq(epg->gc[1].gc.irq.domain, - offset); + return stat; +} - chained_irq_exit(irqchip, desc); +static irqreturn_t ep93xx_ab_irq_handler(int irq, void *dev_id) +{ + return IRQ_RETVAL(ep93xx_gpio_ab_irq_handler(dev_id)); } static void ep93xx_gpio_f_irq_handler(struct irq_desc *desc) { - /* - * map discontiguous hw irq range to continuous sw irq range: - * - * IRQ_EP93XX_GPIO{0..7}MUX -> EP93XX_GPIO_LINE_F{0..7} - */ struct irq_chip *irqchip = irq_desc_get_chip(desc); - unsigned int irq = irq_desc_get_irq(desc); - int port_f_idx = ((irq + 1) & 7) ^ 4; /* {19..22,47..50} -> {0..7} */ - int gpio_irq = EP93XX_GPIO_F_IRQ_BASE + port_f_idx; + struct gpio_chip *gc = irq_desc_get_handler_data(desc); + struct gpio_irq_chip *gic = &gc->irq; + unsigned int parent = irq_desc_get_irq(desc); + unsigned int i; chained_irq_enter(irqchip, desc); - generic_handle_irq(gpio_irq); + for (i = 0; i < gic->num_parents; i++) + if (gic->parents[i] == parent) + break; + + if (i < gic->num_parents) + generic_handle_irq(irq_find_mapping(gc->irq.domain, i)); + chained_irq_exit(irqchip, desc); } @@ -160,51 +125,47 @@ static void ep93xx_gpio_irq_ack(struct irq_data *d) { struct gpio_chip *gc = irq_data_get_irq_chip_data(d); struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc); - struct ep93xx_gpio *epg = gpiochip_get_data(gc); - int port_mask = BIT(d->irq & 7); + int port_mask = BIT(irqd_to_hwirq(d)); if (irqd_get_trigger_type(d) == IRQ_TYPE_EDGE_BOTH) { eic->int_type2 ^= port_mask; /* switch edge direction */ - ep93xx_gpio_update_int_params(epg, eic); + ep93xx_gpio_update_int_params(eic); } - writeb(port_mask, epg->base + eic->irq_offset + EP93XX_INT_EOI_OFFSET); + writeb(port_mask, eic->base + EP93XX_INT_EOI_OFFSET); } static void ep93xx_gpio_irq_mask_ack(struct irq_data *d) { struct gpio_chip *gc = irq_data_get_irq_chip_data(d); struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc); - struct ep93xx_gpio *epg = gpiochip_get_data(gc); - int port_mask = BIT(d->irq & 7); + int port_mask = BIT(irqd_to_hwirq(d)); if (irqd_get_trigger_type(d) == IRQ_TYPE_EDGE_BOTH) eic->int_type2 ^= port_mask; /* switch edge direction */ eic->int_unmasked &= ~port_mask; - ep93xx_gpio_update_int_params(epg, eic); + ep93xx_gpio_update_int_params(eic); - writeb(port_mask, epg->base + eic->irq_offset + EP93XX_INT_EOI_OFFSET); + writeb(port_mask, eic->base + EP93XX_INT_EOI_OFFSET); } static void ep93xx_gpio_irq_mask(struct irq_data *d) { struct gpio_chip *gc = irq_data_get_irq_chip_data(d); struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc); - struct ep93xx_gpio *epg = gpiochip_get_data(gc); - eic->int_unmasked &= ~BIT(d->irq & 7); - ep93xx_gpio_update_int_params(epg, eic); + eic->int_unmasked &= ~BIT(irqd_to_hwirq(d)); + ep93xx_gpio_update_int_params(eic); } static void ep93xx_gpio_irq_unmask(struct irq_data *d) { struct gpio_chip *gc = irq_data_get_irq_chip_data(d); struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc); - struct ep93xx_gpio *epg = gpiochip_get_data(gc); - eic->int_unmasked |= BIT(d->irq & 7); - ep93xx_gpio_update_int_params(epg, eic); + eic->int_unmasked |= BIT(irqd_to_hwirq(d)); + ep93xx_gpio_update_int_params(eic); } /* @@ -216,8 +177,7 @@ static int ep93xx_gpio_irq_type(struct irq_data *d, unsigned int type) { struct gpio_chip *gc = irq_data_get_irq_chip_data(d); struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc); - struct ep93xx_gpio *epg = gpiochip_get_data(gc); - int offset = d->irq & 7; + int offset = irqd_to_hwirq(d); int port_mask = BIT(offset); irq_flow_handler_t handler; @@ -261,51 +221,11 @@ static int ep93xx_gpio_irq_type(struct irq_data *d, unsigned int type) eic->int_enabled |= port_mask; - ep93xx_gpio_update_int_params(epg, eic); + ep93xx_gpio_update_int_params(eic); return 0; } -/************************************************************************* - * gpiolib interface for EP93xx on-chip GPIOs - *************************************************************************/ -struct ep93xx_gpio_bank { - const char *label; - int data; - int dir; - int irq; - int base; - bool has_irq; - bool has_hierarchical_irq; - unsigned int irq_base; -}; - -#define EP93XX_GPIO_BANK(_label, _data, _dir, _irq, _base, _has_irq, _has_hier, _irq_base) \ - { \ - .label = _label, \ - .data = _data, \ - .dir = _dir, \ - .irq = _irq, \ - .base = _base, \ - .has_irq = _has_irq, \ - .has_hierarchical_irq = _has_hier, \ - .irq_base = _irq_base, \ - } - -static struct ep93xx_gpio_bank ep93xx_gpio_banks[] = { - /* Bank A has 8 IRQs */ - EP93XX_GPIO_BANK("A", 0x00, 0x10, 0x90, 0, true, false, EP93XX_GPIO_A_IRQ_BASE), - /* Bank B has 8 IRQs */ - EP93XX_GPIO_BANK("B", 0x04, 0x14, 0xac, 8, true, false, EP93XX_GPIO_B_IRQ_BASE), - EP93XX_GPIO_BANK("C", 0x08, 0x18, 0x00, 40, false, false, 0), - EP93XX_GPIO_BANK("D", 0x0c, 0x1c, 0x00, 24, false, false, 0), - EP93XX_GPIO_BANK("E", 0x20, 0x24, 0x00, 32, false, false, 0), - /* Bank F has 8 IRQs */ - EP93XX_GPIO_BANK("F", 0x30, 0x34, 0x4c, 16, false, true, EP93XX_GPIO_F_IRQ_BASE), - EP93XX_GPIO_BANK("G", 0x38, 0x3c, 0x00, 48, false, false, 0), - EP93XX_GPIO_BANK("H", 0x40, 0x44, 0x00, 56, false, false, 0), -}; - static int ep93xx_gpio_set_config(struct gpio_chip *gc, unsigned offset, unsigned long config) { @@ -329,122 +249,128 @@ static void ep93xx_init_irq_chip(struct device *dev, struct irq_chip *ic) ic->irq_set_type = ep93xx_gpio_irq_type; } -static int ep93xx_gpio_add_bank(struct ep93xx_gpio_chip *egc, - struct platform_device *pdev, - struct ep93xx_gpio *epg, - struct ep93xx_gpio_bank *bank) +static int ep93xx_setup_irqs(struct platform_device *pdev, + struct ep93xx_gpio_chip *egc) { - void __iomem *data = epg->base + bank->data; - void __iomem *dir = epg->base + bank->dir; struct gpio_chip *gc = &egc->gc; struct device *dev = &pdev->dev; - struct gpio_irq_chip *girq; - int err; - - err = bgpio_init(gc, dev, 1, data, NULL, NULL, dir, NULL, 0); - if (err) - return err; - - gc->label = bank->label; - gc->base = bank->base; - - girq = &gc->irq; - if (bank->has_irq || bank->has_hierarchical_irq) { - struct irq_chip *ic; - - gc->set_config = ep93xx_gpio_set_config; - egc->eic = devm_kcalloc(dev, 1, - sizeof(*egc->eic), - GFP_KERNEL); - if (!egc->eic) - return -ENOMEM; - egc->eic->irq_offset = bank->irq; - ic = &egc->eic->ic; - ic->name = devm_kasprintf(dev, GFP_KERNEL, "gpio-irq-%s", bank->label); - if (!ic->name) - return -ENOMEM; - ep93xx_init_irq_chip(dev, ic); - girq->chip = ic; - } + struct gpio_irq_chip *girq = &gc->irq; + struct irq_chip *ic; + int ret, irq, i = 0; + const char *label = 0; + void __iomem *intr = devm_platform_ioremap_resource_byname(pdev, "intr"); + + if (IS_ERR(intr)) + return PTR_ERR(intr); + + gc->set_config = ep93xx_gpio_set_config; + egc->eic = devm_kcalloc(dev, 1, + sizeof(*egc->eic), + GFP_KERNEL); + if (!egc->eic) + return -ENOMEM; - if (bank->has_irq) { - int ab_parent_irq = platform_get_irq(pdev, 0); - - girq->parent_handler = ep93xx_gpio_ab_irq_handler; - girq->num_parents = 1; - girq->parents = devm_kcalloc(dev, girq->num_parents, - sizeof(*girq->parents), - GFP_KERNEL); - if (!girq->parents) - return -ENOMEM; - girq->default_type = IRQ_TYPE_NONE; - girq->handler = handle_level_irq; - girq->parents[0] = ab_parent_irq; - girq->first = bank->irq_base; - } + egc->eic->base = intr; + ic = &egc->eic->ic; + label = dev_name(dev); + ic->name = devm_kasprintf(dev, GFP_KERNEL, "gpio-irq-%s", label); + if (!ic->name) + return -ENOMEM; + + ep93xx_init_irq_chip(dev, ic); + girq->chip = ic; + girq->num_parents = platform_irq_count(pdev); + if (girq->num_parents == 0) + return -EINVAL; + + girq->parents = devm_kcalloc(dev, girq->num_parents, + sizeof(*girq->parents), + GFP_KERNEL); + if (!girq->parents) + return -ENOMEM; - /* Only bank F has especially funky IRQ handling */ - if (bank->has_hierarchical_irq) { - int gpio_irq; - int i; + if (girq->num_parents == 1) { /* A/B irqchips */ + irq = platform_get_irq(pdev, 0); + ret = devm_request_irq(dev, irq, + ep93xx_ab_irq_handler, + IRQF_SHARED, ic->name, gc); + if (ret) { + dev_err(dev, "error requesting IRQ : %d\n", irq); + return ret; + } - /* - * FIXME: convert this to use hierarchical IRQ support! - * this requires fixing the root irqchip to be hierarchical. - */ + girq->parents[0] = irq; + } else { /* F irqchip */ girq->parent_handler = ep93xx_gpio_f_irq_handler; - girq->num_parents = 8; - girq->parents = devm_kcalloc(dev, girq->num_parents, - sizeof(*girq->parents), - GFP_KERNEL); - if (!girq->parents) - return -ENOMEM; - /* Pick resources 1..8 for these IRQs */ + for (i = 0; i < girq->num_parents; i++) { - girq->parents[i] = platform_get_irq(pdev, i + 1); - gpio_irq = bank->irq_base + i; - irq_set_chip_data(gpio_irq, &epg->gc[5]); - irq_set_chip_and_handler(gpio_irq, - girq->chip, - handle_level_irq); - irq_clear_status_flags(gpio_irq, IRQ_NOREQUEST); + irq = platform_get_irq(pdev, i); + if (irq <= 0) + continue; + + girq->parents[i] = irq; } - girq->default_type = IRQ_TYPE_NONE; - girq->handler = handle_level_irq; - girq->first = bank->irq_base; + + girq->map = girq->parents; } - return devm_gpiochip_add_data(dev, gc, epg); + girq->default_type = IRQ_TYPE_NONE; + girq->handler = handle_bad_irq; + + return 0; } static int ep93xx_gpio_probe(struct platform_device *pdev) { - struct ep93xx_gpio *epg; - int i; - - epg = devm_kzalloc(&pdev->dev, sizeof(*epg), GFP_KERNEL); - if (!epg) + struct ep93xx_gpio_chip *egc; + struct gpio_chip *gc; + void __iomem *data; + void __iomem *dir; + const char *name; + int ret; + + egc = devm_kzalloc(&pdev->dev, sizeof(*egc), GFP_KERNEL); + if (!egc) return -ENOMEM; - epg->base = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(epg->base)) - return PTR_ERR(epg->base); + data = devm_platform_ioremap_resource_byname(pdev, "data"); + if (IS_ERR(data)) + return PTR_ERR(data); - for (i = 0; i < ARRAY_SIZE(ep93xx_gpio_banks); i++) { - struct ep93xx_gpio_chip *gc = &epg->gc[i]; - struct ep93xx_gpio_bank *bank = &ep93xx_gpio_banks[i]; + dir = devm_platform_ioremap_resource_byname(pdev, "dir"); + if (IS_ERR(dir)) + return PTR_ERR(dir); - if (ep93xx_gpio_add_bank(gc, pdev, epg, bank)) - dev_warn(&pdev->dev, "Unable to add gpio bank %s\n", - bank->label); + gc = &egc->gc; + ret = bgpio_init(gc, &pdev->dev, 1, data, NULL, NULL, dir, NULL, 0); + if (ret) { + dev_err(&pdev->dev, "unable to init generic GPIO\n"); + return ret; } - return 0; + gc->label = dev_name(&pdev->dev); + if (platform_irq_count(pdev) > 0) { + dev_dbg(&pdev->dev, "setting up irqs for %s\n", dev_name(&pdev->dev)); + ret = ep93xx_setup_irqs(pdev, egc); + if (ret) + dev_err(&pdev->dev, "setup irqs failed for %s\n", dev_name(&pdev->dev)); + } + + return devm_gpiochip_add_data(&pdev->dev, gc, egc); } +#ifdef CONFIG_OF +static const struct of_device_id ep93xx_gpio_match[] = { + { .compatible = "cirrus,ep93xx-gpio" }, + { /* end of table */ }, +}; +MODULE_DEVICE_TABLE(of, ep93xx_gpio_match); +#endif + static struct platform_driver ep93xx_gpio_driver = { .driver = { .name = "gpio-ep93xx", + .of_match_table = ep93xx_gpio_match, }, .probe = ep93xx_gpio_probe, };