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author | John Crispin <blogic@openwrt.org> | 2015-12-10 19:06:32 +0000 |
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committer | John Crispin <blogic@openwrt.org> | 2015-12-10 19:06:32 +0000 |
commit | 930035f9fa98f438a71337f707fc43316318a1be (patch) | |
tree | a0bd281424429737ec1fd7597733e138780f09ac /target/linux/ramips/patches-3.18/0047-GPIO-MIPS-ralink-add-gpio-driver-for-ralink-SoC.patch | |
parent | 61721e21887ea266acd057e4343f5977c29e209b (diff) | |
download | master-187ad058-930035f9fa98f438a71337f707fc43316318a1be.tar.gz master-187ad058-930035f9fa98f438a71337f707fc43316318a1be.tar.bz2 master-187ad058-930035f9fa98f438a71337f707fc43316318a1be.zip |
ralink: bump to the target to v4.3
Signed-off-by: John Crispin <blogic@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@47831 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/ramips/patches-3.18/0047-GPIO-MIPS-ralink-add-gpio-driver-for-ralink-SoC.patch')
-rw-r--r-- | target/linux/ramips/patches-3.18/0047-GPIO-MIPS-ralink-add-gpio-driver-for-ralink-SoC.patch | 430 |
1 files changed, 0 insertions, 430 deletions
diff --git a/target/linux/ramips/patches-3.18/0047-GPIO-MIPS-ralink-add-gpio-driver-for-ralink-SoC.patch b/target/linux/ramips/patches-3.18/0047-GPIO-MIPS-ralink-add-gpio-driver-for-ralink-SoC.patch deleted file mode 100644 index a742e0b10d..0000000000 --- a/target/linux/ramips/patches-3.18/0047-GPIO-MIPS-ralink-add-gpio-driver-for-ralink-SoC.patch +++ /dev/null @@ -1,430 +0,0 @@ -From 4b23ed96930650076caa524ffdde898cb937bdaa Mon Sep 17 00:00:00 2001 -From: John Crispin <blogic@openwrt.org> -Date: Mon, 4 Aug 2014 20:36:29 +0200 -Subject: [PATCH 47/57] GPIO: MIPS: ralink: add gpio driver for ralink SoC - -Add gpio driver for Ralink SoC. This driver makes the gpio core on -RT2880, RT305x, rt3352, rt3662, rt3883, rt5350 and mt7620 work. - -Signed-off-by: John Crispin <blogic@openwrt.org> -Cc: linux-mips@linux-mips.org -Cc: linux-gpio@vger.kernel.org ---- - arch/mips/include/asm/mach-ralink/gpio.h | 24 +++ - drivers/gpio/Kconfig | 6 + - drivers/gpio/Makefile | 1 + - drivers/gpio/gpio-ralink.c | 345 ++++++++++++++++++++++++++++++ - 4 files changed, 376 insertions(+) - create mode 100644 arch/mips/include/asm/mach-ralink/gpio.h - create mode 100644 drivers/gpio/gpio-ralink.c - ---- /dev/null -+++ b/arch/mips/include/asm/mach-ralink/gpio.h -@@ -0,0 +1,24 @@ -+/* -+ * Ralink SoC GPIO API support -+ * -+ * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org> -+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> -+ * -+ * 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. -+ * -+ */ -+ -+#ifndef __ASM_MACH_RALINK_GPIO_H -+#define __ASM_MACH_RALINK_GPIO_H -+ -+#define ARCH_NR_GPIOS 128 -+#include <asm-generic/gpio.h> -+ -+#define gpio_get_value __gpio_get_value -+#define gpio_set_value __gpio_set_value -+#define gpio_cansleep __gpio_cansleep -+#define gpio_to_irq __gpio_to_irq -+ -+#endif /* __ASM_MACH_RALINK_GPIO_H */ ---- a/drivers/gpio/Kconfig -+++ b/drivers/gpio/Kconfig -@@ -288,6 +288,12 @@ config GPIO_SCH311X - To compile this driver as a module, choose M here: the module will - be called gpio-sch311x. - -+config GPIO_RALINK -+ bool "Ralink GPIO Support" -+ depends on RALINK -+ help -+ Say yes here to support the Ralink SoC GPIO device -+ - config GPIO_SPEAR_SPICS - bool "ST SPEAr13xx SPI Chip Select as GPIO support" - depends on PLAT_SPEAR ---- a/drivers/gpio/Makefile -+++ b/drivers/gpio/Makefile -@@ -67,6 +67,7 @@ obj-$(CONFIG_GPIO_PCF857X) += gpio-pcf85 - obj-$(CONFIG_GPIO_PCH) += gpio-pch.o - obj-$(CONFIG_GPIO_PL061) += gpio-pl061.o - obj-$(CONFIG_GPIO_PXA) += gpio-pxa.o -+obj-$(CONFIG_GPIO_RALINK) += gpio-ralink.o - obj-$(CONFIG_GPIO_RC5T583) += gpio-rc5t583.o - obj-$(CONFIG_GPIO_RDC321X) += gpio-rdc321x.o - obj-$(CONFIG_GPIO_RCAR) += gpio-rcar.o ---- /dev/null -+++ b/drivers/gpio/gpio-ralink.c -@@ -0,0 +1,355 @@ -+/* -+ * 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. -+ * -+ * Copyright (C) 2009-2011 Gabor Juhos <juhosg@openwrt.org> -+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org> -+ */ -+ -+#include <linux/module.h> -+#include <linux/io.h> -+#include <linux/gpio.h> -+#include <linux/spinlock.h> -+#include <linux/platform_device.h> -+#include <linux/of_irq.h> -+#include <linux/irqdomain.h> -+#include <linux/interrupt.h> -+ -+enum ralink_gpio_reg { -+ GPIO_REG_INT = 0, -+ GPIO_REG_EDGE, -+ GPIO_REG_RENA, -+ GPIO_REG_FENA, -+ GPIO_REG_DATA, -+ GPIO_REG_DIR, -+ GPIO_REG_POL, -+ GPIO_REG_SET, -+ GPIO_REG_RESET, -+ GPIO_REG_TOGGLE, -+ GPIO_REG_MAX -+}; -+ -+struct ralink_gpio_chip { -+ struct gpio_chip chip; -+ u8 regs[GPIO_REG_MAX]; -+ -+ spinlock_t lock; -+ void __iomem *membase; -+ struct irq_domain *domain; -+ int irq; -+ -+ u32 rising; -+ u32 falling; -+}; -+ -+#define MAP_MAX 4 -+static struct irq_domain *irq_map[MAP_MAX]; -+static int irq_map_count; -+static atomic_t irq_refcount = ATOMIC_INIT(0); -+ -+static inline struct ralink_gpio_chip *to_ralink_gpio(struct gpio_chip *chip) -+{ -+ struct ralink_gpio_chip *rg; -+ -+ rg = container_of(chip, struct ralink_gpio_chip, chip); -+ -+ return rg; -+} -+ -+static inline void rt_gpio_w32(struct ralink_gpio_chip *rg, u8 reg, u32 val) -+{ -+ iowrite32(val, rg->membase + rg->regs[reg]); -+} -+ -+static inline u32 rt_gpio_r32(struct ralink_gpio_chip *rg, u8 reg) -+{ -+ return ioread32(rg->membase + rg->regs[reg]); -+} -+ -+static void ralink_gpio_set(struct gpio_chip *chip, unsigned offset, int value) -+{ -+ struct ralink_gpio_chip *rg = to_ralink_gpio(chip); -+ -+ rt_gpio_w32(rg, (value) ? GPIO_REG_SET : GPIO_REG_RESET, BIT(offset)); -+} -+ -+static int ralink_gpio_get(struct gpio_chip *chip, unsigned offset) -+{ -+ struct ralink_gpio_chip *rg = to_ralink_gpio(chip); -+ -+ return !!(rt_gpio_r32(rg, GPIO_REG_DATA) & BIT(offset)); -+} -+ -+static int ralink_gpio_direction_input(struct gpio_chip *chip, unsigned offset) -+{ -+ struct ralink_gpio_chip *rg = to_ralink_gpio(chip); -+ unsigned long flags; -+ u32 t; -+ -+ spin_lock_irqsave(&rg->lock, flags); -+ t = rt_gpio_r32(rg, GPIO_REG_DIR); -+ t &= ~BIT(offset); -+ rt_gpio_w32(rg, GPIO_REG_DIR, t); -+ spin_unlock_irqrestore(&rg->lock, flags); -+ -+ return 0; -+} -+ -+static int ralink_gpio_direction_output(struct gpio_chip *chip, -+ unsigned offset, int value) -+{ -+ struct ralink_gpio_chip *rg = to_ralink_gpio(chip); -+ unsigned long flags; -+ u32 t; -+ -+ spin_lock_irqsave(&rg->lock, flags); -+ ralink_gpio_set(chip, offset, value); -+ t = rt_gpio_r32(rg, GPIO_REG_DIR); -+ t |= BIT(offset); -+ rt_gpio_w32(rg, GPIO_REG_DIR, t); -+ spin_unlock_irqrestore(&rg->lock, flags); -+ -+ return 0; -+} -+ -+static int ralink_gpio_to_irq(struct gpio_chip *chip, unsigned pin) -+{ -+ struct ralink_gpio_chip *rg = to_ralink_gpio(chip); -+ -+ if (rg->irq < 1) -+ return -1; -+ -+ return irq_create_mapping(rg->domain, pin); -+} -+ -+static void ralink_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) -+{ -+ int i; -+ -+ for (i = 0; i < irq_map_count; i++) { -+ struct irq_domain *domain = irq_map[i]; -+ struct ralink_gpio_chip *rg; -+ unsigned long pending; -+ int bit; -+ -+ rg = (struct ralink_gpio_chip *) domain->host_data; -+ pending = rt_gpio_r32(rg, GPIO_REG_INT); -+ -+ for_each_set_bit(bit, &pending, rg->chip.ngpio) { -+ u32 map = irq_find_mapping(domain, bit); -+ generic_handle_irq(map); -+ rt_gpio_w32(rg, GPIO_REG_INT, BIT(bit)); -+ } -+ } -+} -+ -+static void ralink_gpio_irq_unmask(struct irq_data *d) -+{ -+ struct ralink_gpio_chip *rg; -+ unsigned long flags; -+ u32 rise, fall; -+ -+ rg = (struct ralink_gpio_chip *) d->domain->host_data; -+ rise = rt_gpio_r32(rg, GPIO_REG_RENA); -+ fall = rt_gpio_r32(rg, GPIO_REG_FENA); -+ -+ spin_lock_irqsave(&rg->lock, flags); -+ rt_gpio_w32(rg, GPIO_REG_RENA, rise | (BIT(d->hwirq) & rg->rising)); -+ rt_gpio_w32(rg, GPIO_REG_FENA, fall | (BIT(d->hwirq) & rg->falling)); -+ spin_unlock_irqrestore(&rg->lock, flags); -+} -+ -+static void ralink_gpio_irq_mask(struct irq_data *d) -+{ -+ struct ralink_gpio_chip *rg; -+ unsigned long flags; -+ u32 rise, fall; -+ -+ rg = (struct ralink_gpio_chip *) d->domain->host_data; -+ rise = rt_gpio_r32(rg, GPIO_REG_RENA); -+ fall = rt_gpio_r32(rg, GPIO_REG_FENA); -+ -+ spin_lock_irqsave(&rg->lock, flags); -+ rt_gpio_w32(rg, GPIO_REG_FENA, fall & ~BIT(d->hwirq)); -+ rt_gpio_w32(rg, GPIO_REG_RENA, rise & ~BIT(d->hwirq)); -+ spin_unlock_irqrestore(&rg->lock, flags); -+} -+ -+static int ralink_gpio_irq_type(struct irq_data *d, unsigned int type) -+{ -+ struct ralink_gpio_chip *rg; -+ u32 mask = BIT(d->hwirq); -+ -+ rg = (struct ralink_gpio_chip *) d->domain->host_data; -+ -+ if (type == IRQ_TYPE_PROBE) { -+ if ((rg->rising | rg->falling) & mask) -+ return 0; -+ -+ type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING; -+ } -+ -+ if (type & IRQ_TYPE_EDGE_RISING) -+ rg->rising |= mask; -+ else -+ rg->rising &= ~mask; -+ -+ if (type & IRQ_TYPE_EDGE_FALLING) -+ rg->falling |= mask; -+ else -+ rg->falling &= ~mask; -+ -+ return 0; -+} -+ -+static struct irq_chip ralink_gpio_irq_chip = { -+ .name = "GPIO", -+ .irq_unmask = ralink_gpio_irq_unmask, -+ .irq_mask = ralink_gpio_irq_mask, -+ .irq_mask_ack = ralink_gpio_irq_mask, -+ .irq_set_type = ralink_gpio_irq_type, -+}; -+ -+static int gpio_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw) -+{ -+ irq_set_chip_and_handler(irq, &ralink_gpio_irq_chip, handle_level_irq); -+ irq_set_handler_data(irq, d); -+ -+ return 0; -+} -+ -+static const struct irq_domain_ops irq_domain_ops = { -+ .xlate = irq_domain_xlate_onecell, -+ .map = gpio_map, -+}; -+ -+static void ralink_gpio_irq_init(struct device_node *np, -+ struct ralink_gpio_chip *rg) -+{ -+ if (irq_map_count >= MAP_MAX) -+ return; -+ -+ rg->irq = irq_of_parse_and_map(np, 0); -+ if (!rg->irq) -+ return; -+ -+ rg->domain = irq_domain_add_linear(np, rg->chip.ngpio, -+ &irq_domain_ops, rg); -+ if (!rg->domain) { -+ dev_err(rg->chip.dev, "irq_domain_add_linear failed\n"); -+ return; -+ } -+ -+ irq_map[irq_map_count++] = rg->domain; -+ -+ rt_gpio_w32(rg, GPIO_REG_RENA, 0x0); -+ rt_gpio_w32(rg, GPIO_REG_FENA, 0x0); -+ -+ if (!atomic_read(&irq_refcount)) -+ irq_set_chained_handler(rg->irq, ralink_gpio_irq_handler); -+ atomic_inc(&irq_refcount); -+ -+ dev_info(rg->chip.dev, "registering %d irq handlers\n", rg->chip.ngpio); -+} -+ -+static int ralink_gpio_request(struct gpio_chip *chip, unsigned offset) -+{ -+ int gpio = chip->base + offset; -+ -+ return pinctrl_request_gpio(gpio); -+} -+ -+static void ralink_gpio_free(struct gpio_chip *chip, unsigned offset) -+{ -+ int gpio = chip->base + offset; -+ -+ pinctrl_free_gpio(gpio); -+} -+ -+static int ralink_gpio_probe(struct platform_device *pdev) -+{ -+ struct device_node *np = pdev->dev.of_node; -+ struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); -+ struct ralink_gpio_chip *rg; -+ const __be32 *ngpio, *gpiobase; -+ -+ if (!res) { -+ dev_err(&pdev->dev, "failed to find resource\n"); -+ return -ENOMEM; -+ } -+ -+ rg = devm_kzalloc(&pdev->dev, -+ sizeof(struct ralink_gpio_chip), GFP_KERNEL); -+ if (!rg) -+ return -ENOMEM; -+ -+ rg->membase = devm_ioremap_resource(&pdev->dev, res); -+ if (!rg->membase) { -+ dev_err(&pdev->dev, "cannot remap I/O memory region\n"); -+ return -ENOMEM; -+ } -+ -+ if (of_property_read_u8_array(np, "ralink,register-map", -+ rg->regs, GPIO_REG_MAX)) { -+ dev_err(&pdev->dev, "failed to read register definition\n"); -+ return -EINVAL; -+ } -+ -+ ngpio = of_get_property(np, "ralink,num-gpios", NULL); -+ if (!ngpio) { -+ dev_err(&pdev->dev, "failed to read number of pins\n"); -+ return -EINVAL; -+ } -+ -+ gpiobase = of_get_property(np, "ralink,gpio-base", NULL); -+ if (gpiobase) -+ rg->chip.base = be32_to_cpu(*gpiobase); -+ else -+ rg->chip.base = -1; -+ -+ spin_lock_init(&rg->lock); -+ -+ rg->chip.dev = &pdev->dev; -+ rg->chip.label = dev_name(&pdev->dev); -+ rg->chip.of_node = np; -+ rg->chip.ngpio = be32_to_cpu(*ngpio); -+ rg->chip.direction_input = ralink_gpio_direction_input; -+ rg->chip.direction_output = ralink_gpio_direction_output; -+ rg->chip.get = ralink_gpio_get; -+ rg->chip.set = ralink_gpio_set; -+ rg->chip.request = ralink_gpio_request; -+ rg->chip.to_irq = ralink_gpio_to_irq; -+ rg->chip.free = ralink_gpio_free; -+ -+ /* set polarity to low for all lines */ -+ rt_gpio_w32(rg, GPIO_REG_POL, 0); -+ -+ dev_info(&pdev->dev, "registering %d gpios\n", rg->chip.ngpio); -+ -+ ralink_gpio_irq_init(np, rg); -+ -+ return gpiochip_add(&rg->chip); -+} -+ -+static const struct of_device_id ralink_gpio_match[] = { -+ { .compatible = "ralink,rt2880-gpio" }, -+ {}, -+}; -+MODULE_DEVICE_TABLE(of, ralink_gpio_match); -+ -+static struct platform_driver ralink_gpio_driver = { -+ .probe = ralink_gpio_probe, -+ .driver = { -+ .name = "rt2880_gpio", -+ .owner = THIS_MODULE, -+ .of_match_table = ralink_gpio_match, -+ }, -+}; -+ -+static int __init ralink_gpio_init(void) -+{ -+ return platform_driver_register(&ralink_gpio_driver); -+} -+ -+subsys_initcall(ralink_gpio_init); |