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-rw-r--r--drivers/gpio/gpio-pxa.c829
1 files changed, 829 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-pxa.c b/drivers/gpio/gpio-pxa.c
new file mode 100644
index 000000000..bcc6be4a5
--- /dev/null
+++ b/drivers/gpio/gpio-pxa.c
@@ -0,0 +1,829 @@
+/*
+ * linux/arch/arm/plat-pxa/gpio.c
+ *
+ * Generic PXA GPIO handling
+ *
+ * Author: Nicolas Pitre
+ * Created: Jun 15, 2001
+ * Copyright: MontaVista Software Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/gpio/driver.h>
+#include <linux/gpio-pxa.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/syscore_ops.h>
+#include <linux/slab.h>
+
+/*
+ * We handle the GPIOs by banks, each bank covers up to 32 GPIOs with
+ * one set of registers. The register offsets are organized below:
+ *
+ * GPLR GPDR GPSR GPCR GRER GFER GEDR
+ * BANK 0 - 0x0000 0x000C 0x0018 0x0024 0x0030 0x003C 0x0048
+ * BANK 1 - 0x0004 0x0010 0x001C 0x0028 0x0034 0x0040 0x004C
+ * BANK 2 - 0x0008 0x0014 0x0020 0x002C 0x0038 0x0044 0x0050
+ *
+ * BANK 3 - 0x0100 0x010C 0x0118 0x0124 0x0130 0x013C 0x0148
+ * BANK 4 - 0x0104 0x0110 0x011C 0x0128 0x0134 0x0140 0x014C
+ * BANK 5 - 0x0108 0x0114 0x0120 0x012C 0x0138 0x0144 0x0150
+ *
+ * BANK 6 - 0x0200 0x020C 0x0218 0x0224 0x0230 0x023C 0x0248
+ *
+ * NOTE:
+ * BANK 3 is only available on PXA27x and later processors.
+ * BANK 4 and 5 are only available on PXA935, PXA1928
+ * BANK 6 is only available on PXA1928
+ */
+
+#define GPLR_OFFSET 0x00
+#define GPDR_OFFSET 0x0C
+#define GPSR_OFFSET 0x18
+#define GPCR_OFFSET 0x24
+#define GRER_OFFSET 0x30
+#define GFER_OFFSET 0x3C
+#define GEDR_OFFSET 0x48
+#define GAFR_OFFSET 0x54
+#define ED_MASK_OFFSET 0x9C /* GPIO edge detection for AP side */
+
+#define BANK_OFF(n) (((n) / 3) << 8) + (((n) % 3) << 2)
+
+int pxa_last_gpio;
+static int irq_base;
+
+struct pxa_gpio_bank {
+ void __iomem *regbase;
+ unsigned long irq_mask;
+ unsigned long irq_edge_rise;
+ unsigned long irq_edge_fall;
+
+#ifdef CONFIG_PM
+ unsigned long saved_gplr;
+ unsigned long saved_gpdr;
+ unsigned long saved_grer;
+ unsigned long saved_gfer;
+#endif
+};
+
+struct pxa_gpio_chip {
+ struct device *dev;
+ struct gpio_chip chip;
+ struct pxa_gpio_bank *banks;
+ struct irq_domain *irqdomain;
+
+ int irq0;
+ int irq1;
+ int (*set_wake)(unsigned int gpio, unsigned int on);
+};
+
+enum pxa_gpio_type {
+ PXA25X_GPIO = 0,
+ PXA26X_GPIO,
+ PXA27X_GPIO,
+ PXA3XX_GPIO,
+ PXA93X_GPIO,
+ MMP_GPIO = 0x10,
+ MMP2_GPIO,
+ PXA1928_GPIO,
+};
+
+struct pxa_gpio_id {
+ enum pxa_gpio_type type;
+ int gpio_nums;
+};
+
+static DEFINE_SPINLOCK(gpio_lock);
+static struct pxa_gpio_chip *pxa_gpio_chip;
+static enum pxa_gpio_type gpio_type;
+
+static struct pxa_gpio_id pxa25x_id = {
+ .type = PXA25X_GPIO,
+ .gpio_nums = 85,
+};
+
+static struct pxa_gpio_id pxa26x_id = {
+ .type = PXA26X_GPIO,
+ .gpio_nums = 90,
+};
+
+static struct pxa_gpio_id pxa27x_id = {
+ .type = PXA27X_GPIO,
+ .gpio_nums = 121,
+};
+
+static struct pxa_gpio_id pxa3xx_id = {
+ .type = PXA3XX_GPIO,
+ .gpio_nums = 128,
+};
+
+static struct pxa_gpio_id pxa93x_id = {
+ .type = PXA93X_GPIO,
+ .gpio_nums = 192,
+};
+
+static struct pxa_gpio_id mmp_id = {
+ .type = MMP_GPIO,
+ .gpio_nums = 128,
+};
+
+static struct pxa_gpio_id mmp2_id = {
+ .type = MMP2_GPIO,
+ .gpio_nums = 192,
+};
+
+static struct pxa_gpio_id pxa1928_id = {
+ .type = PXA1928_GPIO,
+ .gpio_nums = 224,
+};
+
+#define for_each_gpio_bank(i, b, pc) \
+ for (i = 0, b = pc->banks; i <= pxa_last_gpio; i += 32, b++)
+
+static inline struct pxa_gpio_chip *chip_to_pxachip(struct gpio_chip *c)
+{
+ struct pxa_gpio_chip *pxa_chip = gpiochip_get_data(c);
+
+ return pxa_chip;
+}
+
+static inline void __iomem *gpio_bank_base(struct gpio_chip *c, int gpio)
+{
+ struct pxa_gpio_chip *p = gpiochip_get_data(c);
+ struct pxa_gpio_bank *bank = p->banks + (gpio / 32);
+
+ return bank->regbase;
+}
+
+static inline struct pxa_gpio_bank *gpio_to_pxabank(struct gpio_chip *c,
+ unsigned gpio)
+{
+ return chip_to_pxachip(c)->banks + gpio / 32;
+}
+
+static inline int gpio_is_pxa_type(int type)
+{
+ return (type & MMP_GPIO) == 0;
+}
+
+static inline int gpio_is_mmp_type(int type)
+{
+ return (type & MMP_GPIO) != 0;
+}
+
+/* GPIO86/87/88/89 on PXA26x have their direction bits in PXA_GPDR(2 inverted,
+ * as well as their Alternate Function value being '1' for GPIO in GAFRx.
+ */
+static inline int __gpio_is_inverted(int gpio)
+{
+ if ((gpio_type == PXA26X_GPIO) && (gpio > 85))
+ return 1;
+ return 0;
+}
+
+/*
+ * On PXA25x and PXA27x, GAFRx and GPDRx together decide the alternate
+ * function of a GPIO, and GPDRx cannot be altered once configured. It
+ * is attributed as "occupied" here (I know this terminology isn't
+ * accurate, you are welcome to propose a better one :-)
+ */
+static inline int __gpio_is_occupied(struct pxa_gpio_chip *pchip, unsigned gpio)
+{
+ void __iomem *base;
+ unsigned long gafr = 0, gpdr = 0;
+ int ret, af = 0, dir = 0;
+
+ base = gpio_bank_base(&pchip->chip, gpio);
+ gpdr = readl_relaxed(base + GPDR_OFFSET);
+
+ switch (gpio_type) {
+ case PXA25X_GPIO:
+ case PXA26X_GPIO:
+ case PXA27X_GPIO:
+ gafr = readl_relaxed(base + GAFR_OFFSET);
+ af = (gafr >> ((gpio & 0xf) * 2)) & 0x3;
+ dir = gpdr & GPIO_bit(gpio);
+
+ if (__gpio_is_inverted(gpio))
+ ret = (af != 1) || (dir == 0);
+ else
+ ret = (af != 0) || (dir != 0);
+ break;
+ default:
+ ret = gpdr & GPIO_bit(gpio);
+ break;
+ }
+ return ret;
+}
+
+int pxa_irq_to_gpio(int irq)
+{
+ struct pxa_gpio_chip *pchip = pxa_gpio_chip;
+ int irq_gpio0;
+
+ irq_gpio0 = irq_find_mapping(pchip->irqdomain, 0);
+ if (irq_gpio0 > 0)
+ return irq - irq_gpio0;
+
+ return irq_gpio0;
+}
+
+static bool pxa_gpio_has_pinctrl(void)
+{
+ switch (gpio_type) {
+ case PXA3XX_GPIO:
+ case MMP2_GPIO:
+ return false;
+
+ default:
+ return true;
+ }
+}
+
+static int pxa_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+ struct pxa_gpio_chip *pchip = chip_to_pxachip(chip);
+
+ return irq_find_mapping(pchip->irqdomain, offset);
+}
+
+static int pxa_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+ void __iomem *base = gpio_bank_base(chip, offset);
+ uint32_t value, mask = GPIO_bit(offset);
+ unsigned long flags;
+ int ret;
+
+ if (pxa_gpio_has_pinctrl()) {
+ ret = pinctrl_gpio_direction_input(chip->base + offset);
+ if (ret)
+ return ret;
+ }
+
+ spin_lock_irqsave(&gpio_lock, flags);
+
+ value = readl_relaxed(base + GPDR_OFFSET);
+ if (__gpio_is_inverted(chip->base + offset))
+ value |= mask;
+ else
+ value &= ~mask;
+ writel_relaxed(value, base + GPDR_OFFSET);
+
+ spin_unlock_irqrestore(&gpio_lock, flags);
+ return 0;
+}
+
+static int pxa_gpio_direction_output(struct gpio_chip *chip,
+ unsigned offset, int value)
+{
+ void __iomem *base = gpio_bank_base(chip, offset);
+ uint32_t tmp, mask = GPIO_bit(offset);
+ unsigned long flags;
+ int ret;
+
+ writel_relaxed(mask, base + (value ? GPSR_OFFSET : GPCR_OFFSET));
+
+ if (pxa_gpio_has_pinctrl()) {
+ ret = pinctrl_gpio_direction_output(chip->base + offset);
+ if (ret)
+ return ret;
+ }
+
+ spin_lock_irqsave(&gpio_lock, flags);
+
+ tmp = readl_relaxed(base + GPDR_OFFSET);
+ if (__gpio_is_inverted(chip->base + offset))
+ tmp &= ~mask;
+ else
+ tmp |= mask;
+ writel_relaxed(tmp, base + GPDR_OFFSET);
+
+ spin_unlock_irqrestore(&gpio_lock, flags);
+ return 0;
+}
+
+static int pxa_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+ void __iomem *base = gpio_bank_base(chip, offset);
+ u32 gplr = readl_relaxed(base + GPLR_OFFSET);
+
+ return !!(gplr & GPIO_bit(offset));
+}
+
+static void pxa_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+ void __iomem *base = gpio_bank_base(chip, offset);
+
+ writel_relaxed(GPIO_bit(offset),
+ base + (value ? GPSR_OFFSET : GPCR_OFFSET));
+}
+
+#ifdef CONFIG_OF_GPIO
+static int pxa_gpio_of_xlate(struct gpio_chip *gc,
+ const struct of_phandle_args *gpiospec,
+ u32 *flags)
+{
+ if (gpiospec->args[0] > pxa_last_gpio)
+ return -EINVAL;
+
+ if (flags)
+ *flags = gpiospec->args[1];
+
+ return gpiospec->args[0];
+}
+#endif
+
+static int pxa_init_gpio_chip(struct pxa_gpio_chip *pchip, int ngpio,
+ struct device_node *np, void __iomem *regbase)
+{
+ int i, gpio, nbanks = DIV_ROUND_UP(ngpio, 32);
+ struct pxa_gpio_bank *bank;
+
+ pchip->banks = devm_kcalloc(pchip->dev, nbanks, sizeof(*pchip->banks),
+ GFP_KERNEL);
+ if (!pchip->banks)
+ return -ENOMEM;
+
+ pchip->chip.label = "gpio-pxa";
+ pchip->chip.direction_input = pxa_gpio_direction_input;
+ pchip->chip.direction_output = pxa_gpio_direction_output;
+ pchip->chip.get = pxa_gpio_get;
+ pchip->chip.set = pxa_gpio_set;
+ pchip->chip.to_irq = pxa_gpio_to_irq;
+ pchip->chip.ngpio = ngpio;
+
+ if (pxa_gpio_has_pinctrl()) {
+ pchip->chip.request = gpiochip_generic_request;
+ pchip->chip.free = gpiochip_generic_free;
+ }
+
+#ifdef CONFIG_OF_GPIO
+ pchip->chip.of_node = np;
+ pchip->chip.of_xlate = pxa_gpio_of_xlate;
+ pchip->chip.of_gpio_n_cells = 2;
+#endif
+
+ for (i = 0, gpio = 0; i < nbanks; i++, gpio += 32) {
+ bank = pchip->banks + i;
+ bank->regbase = regbase + BANK_OFF(i);
+ }
+
+ return gpiochip_add_data(&pchip->chip, pchip);
+}
+
+/* Update only those GRERx and GFERx edge detection register bits if those
+ * bits are set in c->irq_mask
+ */
+static inline void update_edge_detect(struct pxa_gpio_bank *c)
+{
+ uint32_t grer, gfer;
+
+ grer = readl_relaxed(c->regbase + GRER_OFFSET) & ~c->irq_mask;
+ gfer = readl_relaxed(c->regbase + GFER_OFFSET) & ~c->irq_mask;
+ grer |= c->irq_edge_rise & c->irq_mask;
+ gfer |= c->irq_edge_fall & c->irq_mask;
+ writel_relaxed(grer, c->regbase + GRER_OFFSET);
+ writel_relaxed(gfer, c->regbase + GFER_OFFSET);
+}
+
+static int pxa_gpio_irq_type(struct irq_data *d, unsigned int type)
+{
+ struct pxa_gpio_chip *pchip = irq_data_get_irq_chip_data(d);
+ unsigned int gpio = irqd_to_hwirq(d);
+ struct pxa_gpio_bank *c = gpio_to_pxabank(&pchip->chip, gpio);
+ unsigned long gpdr, mask = GPIO_bit(gpio);
+
+ if (type == IRQ_TYPE_PROBE) {
+ /* Don't mess with enabled GPIOs using preconfigured edges or
+ * GPIOs set to alternate function or to output during probe
+ */
+ if ((c->irq_edge_rise | c->irq_edge_fall) & GPIO_bit(gpio))
+ return 0;
+
+ if (__gpio_is_occupied(pchip, gpio))
+ return 0;
+
+ type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
+ }
+
+ gpdr = readl_relaxed(c->regbase + GPDR_OFFSET);
+
+ if (__gpio_is_inverted(gpio))
+ writel_relaxed(gpdr | mask, c->regbase + GPDR_OFFSET);
+ else
+ writel_relaxed(gpdr & ~mask, c->regbase + GPDR_OFFSET);
+
+ if (type & IRQ_TYPE_EDGE_RISING)
+ c->irq_edge_rise |= mask;
+ else
+ c->irq_edge_rise &= ~mask;
+
+ if (type & IRQ_TYPE_EDGE_FALLING)
+ c->irq_edge_fall |= mask;
+ else
+ c->irq_edge_fall &= ~mask;
+
+ update_edge_detect(c);
+
+ pr_debug("%s: IRQ%d (GPIO%d) - edge%s%s\n", __func__, d->irq, gpio,
+ ((type & IRQ_TYPE_EDGE_RISING) ? " rising" : ""),
+ ((type & IRQ_TYPE_EDGE_FALLING) ? " falling" : ""));
+ return 0;
+}
+
+static irqreturn_t pxa_gpio_demux_handler(int in_irq, void *d)
+{
+ int loop, gpio, n, handled = 0;
+ unsigned long gedr;
+ struct pxa_gpio_chip *pchip = d;
+ struct pxa_gpio_bank *c;
+
+ do {
+ loop = 0;
+ for_each_gpio_bank(gpio, c, pchip) {
+ gedr = readl_relaxed(c->regbase + GEDR_OFFSET);
+ gedr = gedr & c->irq_mask;
+ writel_relaxed(gedr, c->regbase + GEDR_OFFSET);
+
+ for_each_set_bit(n, &gedr, BITS_PER_LONG) {
+ loop = 1;
+
+ generic_handle_irq(
+ irq_find_mapping(pchip->irqdomain,
+ gpio + n));
+ }
+ }
+ handled += loop;
+ } while (loop);
+
+ return handled ? IRQ_HANDLED : IRQ_NONE;
+}
+
+static irqreturn_t pxa_gpio_direct_handler(int in_irq, void *d)
+{
+ struct pxa_gpio_chip *pchip = d;
+
+ if (in_irq == pchip->irq0) {
+ generic_handle_irq(irq_find_mapping(pchip->irqdomain, 0));
+ } else if (in_irq == pchip->irq1) {
+ generic_handle_irq(irq_find_mapping(pchip->irqdomain, 1));
+ } else {
+ pr_err("%s() unknown irq %d\n", __func__, in_irq);
+ return IRQ_NONE;
+ }
+ return IRQ_HANDLED;
+}
+
+static void pxa_ack_muxed_gpio(struct irq_data *d)
+{
+ struct pxa_gpio_chip *pchip = irq_data_get_irq_chip_data(d);
+ unsigned int gpio = irqd_to_hwirq(d);
+ void __iomem *base = gpio_bank_base(&pchip->chip, gpio);
+
+ writel_relaxed(GPIO_bit(gpio), base + GEDR_OFFSET);
+}
+
+static void pxa_mask_muxed_gpio(struct irq_data *d)
+{
+ struct pxa_gpio_chip *pchip = irq_data_get_irq_chip_data(d);
+ unsigned int gpio = irqd_to_hwirq(d);
+ struct pxa_gpio_bank *b = gpio_to_pxabank(&pchip->chip, gpio);
+ void __iomem *base = gpio_bank_base(&pchip->chip, gpio);
+ uint32_t grer, gfer;
+
+ b->irq_mask &= ~GPIO_bit(gpio);
+
+ grer = readl_relaxed(base + GRER_OFFSET) & ~GPIO_bit(gpio);
+ gfer = readl_relaxed(base + GFER_OFFSET) & ~GPIO_bit(gpio);
+ writel_relaxed(grer, base + GRER_OFFSET);
+ writel_relaxed(gfer, base + GFER_OFFSET);
+}
+
+static int pxa_gpio_set_wake(struct irq_data *d, unsigned int on)
+{
+ struct pxa_gpio_chip *pchip = irq_data_get_irq_chip_data(d);
+ unsigned int gpio = irqd_to_hwirq(d);
+
+ if (pchip->set_wake)
+ return pchip->set_wake(gpio, on);
+ else
+ return 0;
+}
+
+static void pxa_unmask_muxed_gpio(struct irq_data *d)
+{
+ struct pxa_gpio_chip *pchip = irq_data_get_irq_chip_data(d);
+ unsigned int gpio = irqd_to_hwirq(d);
+ struct pxa_gpio_bank *c = gpio_to_pxabank(&pchip->chip, gpio);
+
+ c->irq_mask |= GPIO_bit(gpio);
+ update_edge_detect(c);
+}
+
+static struct irq_chip pxa_muxed_gpio_chip = {
+ .name = "GPIO",
+ .irq_ack = pxa_ack_muxed_gpio,
+ .irq_mask = pxa_mask_muxed_gpio,
+ .irq_unmask = pxa_unmask_muxed_gpio,
+ .irq_set_type = pxa_gpio_irq_type,
+ .irq_set_wake = pxa_gpio_set_wake,
+};
+
+static int pxa_gpio_nums(struct platform_device *pdev)
+{
+ const struct platform_device_id *id = platform_get_device_id(pdev);
+ struct pxa_gpio_id *pxa_id = (struct pxa_gpio_id *)id->driver_data;
+ int count = 0;
+
+ switch (pxa_id->type) {
+ case PXA25X_GPIO:
+ case PXA26X_GPIO:
+ case PXA27X_GPIO:
+ case PXA3XX_GPIO:
+ case PXA93X_GPIO:
+ case MMP_GPIO:
+ case MMP2_GPIO:
+ case PXA1928_GPIO:
+ gpio_type = pxa_id->type;
+ count = pxa_id->gpio_nums - 1;
+ break;
+ default:
+ count = -EINVAL;
+ break;
+ }
+ return count;
+}
+
+static int pxa_irq_domain_map(struct irq_domain *d, unsigned int irq,
+ irq_hw_number_t hw)
+{
+ irq_set_chip_and_handler(irq, &pxa_muxed_gpio_chip,
+ handle_edge_irq);
+ irq_set_chip_data(irq, d->host_data);
+ irq_set_noprobe(irq);
+ return 0;
+}
+
+const struct irq_domain_ops pxa_irq_domain_ops = {
+ .map = pxa_irq_domain_map,
+ .xlate = irq_domain_xlate_twocell,
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id pxa_gpio_dt_ids[] = {
+ { .compatible = "intel,pxa25x-gpio", .data = &pxa25x_id, },
+ { .compatible = "intel,pxa26x-gpio", .data = &pxa26x_id, },
+ { .compatible = "intel,pxa27x-gpio", .data = &pxa27x_id, },
+ { .compatible = "intel,pxa3xx-gpio", .data = &pxa3xx_id, },
+ { .compatible = "marvell,pxa93x-gpio", .data = &pxa93x_id, },
+ { .compatible = "marvell,mmp-gpio", .data = &mmp_id, },
+ { .compatible = "marvell,mmp2-gpio", .data = &mmp2_id, },
+ { .compatible = "marvell,pxa1928-gpio", .data = &pxa1928_id, },
+ {}
+};
+
+static int pxa_gpio_probe_dt(struct platform_device *pdev,
+ struct pxa_gpio_chip *pchip)
+{
+ int nr_gpios;
+ const struct pxa_gpio_id *gpio_id;
+
+ gpio_id = of_device_get_match_data(&pdev->dev);
+ gpio_type = gpio_id->type;
+
+ nr_gpios = gpio_id->gpio_nums;
+ pxa_last_gpio = nr_gpios - 1;
+
+ irq_base = devm_irq_alloc_descs(&pdev->dev, -1, 0, nr_gpios, 0);
+ if (irq_base < 0) {
+ dev_err(&pdev->dev, "Failed to allocate IRQ numbers\n");
+ return irq_base;
+ }
+ return irq_base;
+}
+#else
+#define pxa_gpio_probe_dt(pdev, pchip) (-1)
+#endif
+
+static int pxa_gpio_probe(struct platform_device *pdev)
+{
+ struct pxa_gpio_chip *pchip;
+ struct pxa_gpio_bank *c;
+ struct resource *res;
+ struct clk *clk;
+ struct pxa_gpio_platform_data *info;
+ void __iomem *gpio_reg_base;
+ int gpio, ret;
+ int irq0 = 0, irq1 = 0, irq_mux;
+
+ pchip = devm_kzalloc(&pdev->dev, sizeof(*pchip), GFP_KERNEL);
+ if (!pchip)
+ return -ENOMEM;
+ pchip->dev = &pdev->dev;
+
+ info = dev_get_platdata(&pdev->dev);
+ if (info) {
+ irq_base = info->irq_base;
+ if (irq_base <= 0)
+ return -EINVAL;
+ pxa_last_gpio = pxa_gpio_nums(pdev);
+ pchip->set_wake = info->gpio_set_wake;
+ } else {
+ irq_base = pxa_gpio_probe_dt(pdev, pchip);
+ if (irq_base < 0)
+ return -EINVAL;
+ }
+
+ if (!pxa_last_gpio)
+ return -EINVAL;
+
+ pchip->irqdomain = irq_domain_add_legacy(pdev->dev.of_node,
+ pxa_last_gpio + 1, irq_base,
+ 0, &pxa_irq_domain_ops, pchip);
+ if (!pchip->irqdomain)
+ return -ENOMEM;
+
+ irq0 = platform_get_irq_byname(pdev, "gpio0");
+ irq1 = platform_get_irq_byname(pdev, "gpio1");
+ irq_mux = platform_get_irq_byname(pdev, "gpio_mux");
+ if ((irq0 > 0 && irq1 <= 0) || (irq0 <= 0 && irq1 > 0)
+ || (irq_mux <= 0))
+ return -EINVAL;
+
+ pchip->irq0 = irq0;
+ pchip->irq1 = irq1;
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -EINVAL;
+ gpio_reg_base = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
+ if (!gpio_reg_base)
+ return -EINVAL;
+
+ clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(clk)) {
+ dev_err(&pdev->dev, "Error %ld to get gpio clock\n",
+ PTR_ERR(clk));
+ return PTR_ERR(clk);
+ }
+ ret = clk_prepare_enable(clk);
+ if (ret) {
+ clk_put(clk);
+ return ret;
+ }
+
+ /* Initialize GPIO chips */
+ ret = pxa_init_gpio_chip(pchip, pxa_last_gpio + 1, pdev->dev.of_node,
+ gpio_reg_base);
+ if (ret) {
+ clk_put(clk);
+ return ret;
+ }
+
+ /* clear all GPIO edge detects */
+ for_each_gpio_bank(gpio, c, pchip) {
+ writel_relaxed(0, c->regbase + GFER_OFFSET);
+ writel_relaxed(0, c->regbase + GRER_OFFSET);
+ writel_relaxed(~0, c->regbase + GEDR_OFFSET);
+ /* unmask GPIO edge detect for AP side */
+ if (gpio_is_mmp_type(gpio_type))
+ writel_relaxed(~0, c->regbase + ED_MASK_OFFSET);
+ }
+
+ if (irq0 > 0) {
+ ret = devm_request_irq(&pdev->dev,
+ irq0, pxa_gpio_direct_handler, 0,
+ "gpio-0", pchip);
+ if (ret)
+ dev_err(&pdev->dev, "request of gpio0 irq failed: %d\n",
+ ret);
+ }
+ if (irq1 > 0) {
+ ret = devm_request_irq(&pdev->dev,
+ irq1, pxa_gpio_direct_handler, 0,
+ "gpio-1", pchip);
+ if (ret)
+ dev_err(&pdev->dev, "request of gpio1 irq failed: %d\n",
+ ret);
+ }
+ ret = devm_request_irq(&pdev->dev,
+ irq_mux, pxa_gpio_demux_handler, 0,
+ "gpio-mux", pchip);
+ if (ret)
+ dev_err(&pdev->dev, "request of gpio-mux irq failed: %d\n",
+ ret);
+
+ pxa_gpio_chip = pchip;
+
+ return 0;
+}
+
+static const struct platform_device_id gpio_id_table[] = {
+ { "pxa25x-gpio", (unsigned long)&pxa25x_id },
+ { "pxa26x-gpio", (unsigned long)&pxa26x_id },
+ { "pxa27x-gpio", (unsigned long)&pxa27x_id },
+ { "pxa3xx-gpio", (unsigned long)&pxa3xx_id },
+ { "pxa93x-gpio", (unsigned long)&pxa93x_id },
+ { "mmp-gpio", (unsigned long)&mmp_id },
+ { "mmp2-gpio", (unsigned long)&mmp2_id },
+ { "pxa1928-gpio", (unsigned long)&pxa1928_id },
+ { },
+};
+
+static struct platform_driver pxa_gpio_driver = {
+ .probe = pxa_gpio_probe,
+ .driver = {
+ .name = "pxa-gpio",
+ .of_match_table = of_match_ptr(pxa_gpio_dt_ids),
+ },
+ .id_table = gpio_id_table,
+};
+
+static int __init pxa_gpio_legacy_init(void)
+{
+ if (of_have_populated_dt())
+ return 0;
+
+ return platform_driver_register(&pxa_gpio_driver);
+}
+postcore_initcall(pxa_gpio_legacy_init);
+
+static int __init pxa_gpio_dt_init(void)
+{
+ if (of_have_populated_dt())
+ return platform_driver_register(&pxa_gpio_driver);
+
+ return 0;
+}
+device_initcall(pxa_gpio_dt_init);
+
+#ifdef CONFIG_PM
+static int pxa_gpio_suspend(void)
+{
+ struct pxa_gpio_chip *pchip = pxa_gpio_chip;
+ struct pxa_gpio_bank *c;
+ int gpio;
+
+ if (!pchip)
+ return 0;
+
+ for_each_gpio_bank(gpio, c, pchip) {
+ c->saved_gplr = readl_relaxed(c->regbase + GPLR_OFFSET);
+ c->saved_gpdr = readl_relaxed(c->regbase + GPDR_OFFSET);
+ c->saved_grer = readl_relaxed(c->regbase + GRER_OFFSET);
+ c->saved_gfer = readl_relaxed(c->regbase + GFER_OFFSET);
+
+ /* Clear GPIO transition detect bits */
+ writel_relaxed(0xffffffff, c->regbase + GEDR_OFFSET);
+ }
+ return 0;
+}
+
+static void pxa_gpio_resume(void)
+{
+ struct pxa_gpio_chip *pchip = pxa_gpio_chip;
+ struct pxa_gpio_bank *c;
+ int gpio;
+
+ if (!pchip)
+ return;
+
+ for_each_gpio_bank(gpio, c, pchip) {
+ /* restore level with set/clear */
+ writel_relaxed(c->saved_gplr, c->regbase + GPSR_OFFSET);
+ writel_relaxed(~c->saved_gplr, c->regbase + GPCR_OFFSET);
+
+ writel_relaxed(c->saved_grer, c->regbase + GRER_OFFSET);
+ writel_relaxed(c->saved_gfer, c->regbase + GFER_OFFSET);
+ writel_relaxed(c->saved_gpdr, c->regbase + GPDR_OFFSET);
+ }
+}
+#else
+#define pxa_gpio_suspend NULL
+#define pxa_gpio_resume NULL
+#endif
+
+struct syscore_ops pxa_gpio_syscore_ops = {
+ .suspend = pxa_gpio_suspend,
+ .resume = pxa_gpio_resume,
+};
+
+static int __init pxa_gpio_sysinit(void)
+{
+ register_syscore_ops(&pxa_gpio_syscore_ops);
+ return 0;
+}
+postcore_initcall(pxa_gpio_sysinit);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-25 01:46:34 +0000