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author | James <> | 2015-09-26 12:29:31 +0100 |
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committer | James <> | 2015-09-26 12:29:31 +0100 |
commit | 626d9efa74685720020e816f3a917b7591d3cf7a (patch) | |
tree | d22eef73ae82287b30a1140decb4fc806d39d621 /target/linux/ramips/patches-3.18/0048-GPIO-ralink-add-mt7621-gpio-controller.patch | |
download | trunk-47048-626d9efa74685720020e816f3a917b7591d3cf7a.tar.gz trunk-47048-626d9efa74685720020e816f3a917b7591d3cf7a.tar.bz2 trunk-47048-626d9efa74685720020e816f3a917b7591d3cf7a.zip |
trunk-47048
Diffstat (limited to 'target/linux/ramips/patches-3.18/0048-GPIO-ralink-add-mt7621-gpio-controller.patch')
-rw-r--r-- | target/linux/ramips/patches-3.18/0048-GPIO-ralink-add-mt7621-gpio-controller.patch | 406 |
1 files changed, 406 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-3.18/0048-GPIO-ralink-add-mt7621-gpio-controller.patch b/target/linux/ramips/patches-3.18/0048-GPIO-ralink-add-mt7621-gpio-controller.patch new file mode 100644 index 0000000..5d5f99e --- /dev/null +++ b/target/linux/ramips/patches-3.18/0048-GPIO-ralink-add-mt7621-gpio-controller.patch @@ -0,0 +1,406 @@ +From 8481cdf6f96dc16cbcc129d046c021d17a891274 Mon Sep 17 00:00:00 2001 +From: John Crispin <blogic@openwrt.org> +Date: Sun, 27 Jul 2014 11:00:32 +0100 +Subject: [PATCH 48/57] GPIO: ralink: add mt7621 gpio controller + +Signed-off-by: John Crispin <blogic@openwrt.org> +--- + arch/mips/Kconfig | 3 + + drivers/gpio/Kconfig | 6 ++ + drivers/gpio/Makefile | 1 + + drivers/gpio/gpio-mt7621.c | 177 ++++++++++++++++++++++++++++++++++++++++++++ + 4 files changed, 187 insertions(+) + create mode 100644 drivers/gpio/gpio-mt7621.c + +--- a/arch/mips/Kconfig ++++ b/arch/mips/Kconfig +@@ -455,6 +455,9 @@ + select RESET_CONTROLLER + select PINCTRL + select PINCTRL_RT2880 ++ select ARCH_HAS_RESET_CONTROLLER ++ select RESET_CONTROLLER ++ select ARCH_REQUIRE_GPIOLIB + + config SGI_IP22 + bool "SGI IP22 (Indy/Indigo2)" +--- a/drivers/gpio/Kconfig ++++ b/drivers/gpio/Kconfig +@@ -898,6 +898,12 @@ + help + Turn on GPIO support for Broadcom "Kona" chips. + ++config GPIO_MT7621 ++ bool "Mediatek GPIO Support" ++ depends on SOC_MT7620 || SOC_MT7621 ++ help ++ Say yes here to support the Mediatek SoC GPIO device ++ + comment "USB GPIO expanders:" + + config GPIO_VIPERBOARD +--- a/drivers/gpio/Makefile ++++ b/drivers/gpio/Makefile +@@ -107,3 +107,5 @@ + obj-$(CONFIG_GPIO_XTENSA) += gpio-xtensa.o + obj-$(CONFIG_GPIO_ZEVIO) += gpio-zevio.o + obj-$(CONFIG_GPIO_ZYNQ) += gpio-zynq.o ++obj-$(CONFIG_GPIO_MT7621) += gpio-mt7621.o ++ +--- /dev/null ++++ b/drivers/gpio/gpio-mt7621.c +@@ -0,0 +1,354 @@ ++/* ++ * 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/io.h> ++#include <linux/err.h> ++#include <linux/gpio.h> ++#include <linux/module.h> ++#include <linux/of_irq.h> ++#include <linux/spinlock.h> ++#include <linux/irqdomain.h> ++#include <linux/interrupt.h> ++#include <linux/platform_device.h> ++ ++#define MTK_MAX_BANK 3 ++#define MTK_BANK_WIDTH 32 ++ ++enum mediatek_gpio_reg { ++ GPIO_REG_CTRL = 0, ++ GPIO_REG_POL, ++ GPIO_REG_DATA, ++ GPIO_REG_DSET, ++ GPIO_REG_DCLR, ++ GPIO_REG_REDGE, ++ GPIO_REG_FEDGE, ++ GPIO_REG_HLVL, ++ GPIO_REG_LLVL, ++ GPIO_REG_STAT, ++ GPIO_REG_EDGE, ++}; ++ ++static void __iomem *mediatek_gpio_membase; ++static int mediatek_gpio_irq; ++static struct irq_domain *mediatek_gpio_irq_domain; ++static atomic_t irq_refcount = ATOMIC_INIT(0); ++ ++struct mtk_gc { ++ struct gpio_chip chip; ++ spinlock_t lock; ++ int bank; ++ u32 rising; ++ u32 falling; ++} *gc_map[MTK_MAX_BANK]; ++ ++static inline struct mtk_gc ++*to_mediatek_gpio(struct gpio_chip *chip) ++{ ++ struct mtk_gc *mgc; ++ ++ mgc = container_of(chip, struct mtk_gc, chip); ++ ++ return mgc; ++} ++ ++static inline void ++mtk_gpio_w32(struct mtk_gc *rg, u8 reg, u32 val) ++{ ++ iowrite32(val, mediatek_gpio_membase + (reg * 0x10) + (rg->bank * 0x4)); ++} ++ ++static inline u32 ++mtk_gpio_r32(struct mtk_gc *rg, u8 reg) ++{ ++ return ioread32(mediatek_gpio_membase + (reg * 0x10) + (rg->bank * 0x4)); ++} ++ ++static void ++mediatek_gpio_set(struct gpio_chip *chip, unsigned offset, int value) ++{ ++ struct mtk_gc *rg = to_mediatek_gpio(chip); ++ ++ mtk_gpio_w32(rg, (value) ? GPIO_REG_DSET : GPIO_REG_DCLR, BIT(offset)); ++} ++ ++static int ++mediatek_gpio_get(struct gpio_chip *chip, unsigned offset) ++{ ++ struct mtk_gc *rg = to_mediatek_gpio(chip); ++ ++ return !!(mtk_gpio_r32(rg, GPIO_REG_DATA) & BIT(offset)); ++} ++ ++static int ++mediatek_gpio_direction_input(struct gpio_chip *chip, unsigned offset) ++{ ++ struct mtk_gc *rg = to_mediatek_gpio(chip); ++ unsigned long flags; ++ u32 t; ++ ++ spin_lock_irqsave(&rg->lock, flags); ++ t = mtk_gpio_r32(rg, GPIO_REG_CTRL); ++ t &= ~BIT(offset); ++ mtk_gpio_w32(rg, GPIO_REG_CTRL, t); ++ spin_unlock_irqrestore(&rg->lock, flags); ++ ++ return 0; ++} ++ ++static int ++mediatek_gpio_direction_output(struct gpio_chip *chip, ++ unsigned offset, int value) ++{ ++ struct mtk_gc *rg = to_mediatek_gpio(chip); ++ unsigned long flags; ++ u32 t; ++ ++ spin_lock_irqsave(&rg->lock, flags); ++ t = mtk_gpio_r32(rg, GPIO_REG_CTRL); ++ t |= BIT(offset); ++ mtk_gpio_w32(rg, GPIO_REG_CTRL, t); ++ mediatek_gpio_set(chip, offset, value); ++ spin_unlock_irqrestore(&rg->lock, flags); ++ ++ return 0; ++} ++ ++static int ++mediatek_gpio_get_direction(struct gpio_chip *chip, unsigned offset) ++{ ++ struct mtk_gc *rg = to_mediatek_gpio(chip); ++ unsigned long flags; ++ u32 t; ++ ++ spin_lock_irqsave(&rg->lock, flags); ++ t = mtk_gpio_r32(rg, GPIO_REG_CTRL); ++ spin_unlock_irqrestore(&rg->lock, flags); ++ ++ if (t & BIT(offset)) ++ return 0; ++ ++ return 1; ++} ++ ++static int ++mediatek_gpio_to_irq(struct gpio_chip *chip, unsigned pin) ++{ ++ struct mtk_gc *rg = to_mediatek_gpio(chip); ++ ++ return irq_create_mapping(mediatek_gpio_irq_domain, pin + (rg->bank * MTK_BANK_WIDTH)); ++} ++ ++static int ++mediatek_gpio_bank_probe(struct platform_device *pdev, struct device_node *bank) ++{ ++ const __be32 *id = of_get_property(bank, "reg", NULL); ++ struct mtk_gc *rg = devm_kzalloc(&pdev->dev, ++ sizeof(struct mtk_gc), GFP_KERNEL); ++ ++ if (!rg || !id || be32_to_cpu(*id) > MTK_MAX_BANK) ++ return -ENOMEM; ++ ++ gc_map[be32_to_cpu(*id)] = rg; ++ ++ memset(rg, 0, sizeof(struct mtk_gc)); ++ ++ spin_lock_init(&rg->lock); ++ ++ rg->chip.dev = &pdev->dev; ++ rg->chip.label = dev_name(&pdev->dev); ++ rg->chip.of_node = bank; ++ rg->chip.base = MTK_BANK_WIDTH * be32_to_cpu(*id); ++ rg->chip.ngpio = MTK_BANK_WIDTH; ++ rg->chip.direction_input = mediatek_gpio_direction_input; ++ rg->chip.direction_output = mediatek_gpio_direction_output; ++ rg->chip.get_direction = mediatek_gpio_get_direction; ++ rg->chip.get = mediatek_gpio_get; ++ rg->chip.set = mediatek_gpio_set; ++ if (mediatek_gpio_irq_domain) ++ rg->chip.to_irq = mediatek_gpio_to_irq; ++ rg->bank = be32_to_cpu(*id); ++ ++ /* set polarity to low for all gpios */ ++ mtk_gpio_w32(rg, GPIO_REG_POL, 0); ++ ++ dev_info(&pdev->dev, "registering %d gpios\n", rg->chip.ngpio); ++ ++ return gpiochip_add(&rg->chip); ++} ++ ++static void ++mediatek_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) ++{ ++ int i; ++ ++ for (i = 0; i < MTK_MAX_BANK; i++) { ++ struct mtk_gc *rg = gc_map[i]; ++ unsigned long pending; ++ int bit; ++ ++ if (!rg) ++ continue; ++ ++ pending = mtk_gpio_r32(rg, GPIO_REG_STAT); ++ ++ for_each_set_bit(bit, &pending, MTK_BANK_WIDTH) { ++ u32 map = irq_find_mapping(mediatek_gpio_irq_domain, bit); ++ ++ generic_handle_irq(map); ++ mtk_gpio_w32(rg, GPIO_REG_STAT, BIT(bit)); ++ } ++ } ++} ++ ++static void ++mediatek_gpio_irq_unmask(struct irq_data *d) ++{ ++ int pin = d->hwirq; ++ int bank = pin / 32; ++ struct mtk_gc *rg = gc_map[bank]; ++ unsigned long flags; ++ u32 rise, fall; ++ ++ if (!rg) ++ return; ++ ++ rise = mtk_gpio_r32(rg, GPIO_REG_REDGE); ++ fall = mtk_gpio_r32(rg, GPIO_REG_FEDGE); ++ ++ spin_lock_irqsave(&rg->lock, flags); ++ mtk_gpio_w32(rg, GPIO_REG_REDGE, rise | (BIT(d->hwirq) & rg->rising)); ++ mtk_gpio_w32(rg, GPIO_REG_FEDGE, fall | (BIT(d->hwirq) & rg->falling)); ++ spin_unlock_irqrestore(&rg->lock, flags); ++} ++ ++static void ++mediatek_gpio_irq_mask(struct irq_data *d) ++{ ++ int pin = d->hwirq; ++ int bank = pin / 32; ++ struct mtk_gc *rg = gc_map[bank]; ++ unsigned long flags; ++ u32 rise, fall; ++ ++ if (!rg) ++ return; ++ ++ rise = mtk_gpio_r32(rg, GPIO_REG_REDGE); ++ fall = mtk_gpio_r32(rg, GPIO_REG_FEDGE); ++ ++ spin_lock_irqsave(&rg->lock, flags); ++ mtk_gpio_w32(rg, GPIO_REG_FEDGE, fall & ~BIT(d->hwirq)); ++ mtk_gpio_w32(rg, GPIO_REG_REDGE, rise & ~BIT(d->hwirq)); ++ spin_unlock_irqrestore(&rg->lock, flags); ++} ++ ++static int ++mediatek_gpio_irq_type(struct irq_data *d, unsigned int type) ++{ ++ int pin = d->hwirq; ++ int bank = pin / 32; ++ struct mtk_gc *rg = gc_map[bank]; ++ u32 mask = BIT(d->hwirq); ++ ++ if (!rg) ++ return -1; ++ ++ 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 mediatek_gpio_irq_chip = { ++ .name = "GPIO", ++ .irq_unmask = mediatek_gpio_irq_unmask, ++ .irq_mask = mediatek_gpio_irq_mask, ++ .irq_mask_ack = mediatek_gpio_irq_mask, ++ .irq_set_type = mediatek_gpio_irq_type, ++}; ++ ++static int ++mediatek_gpio_gpio_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw) ++{ ++ irq_set_chip_and_handler(irq, &mediatek_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 = mediatek_gpio_gpio_map, ++}; ++ ++static int ++mediatek_gpio_probe(struct platform_device *pdev) ++{ ++ struct device_node *bank, *np = pdev->dev.of_node; ++ struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ ++ mediatek_gpio_membase = devm_ioremap_resource(&pdev->dev, res); ++ if (IS_ERR(mediatek_gpio_membase)) ++ return PTR_ERR(mediatek_gpio_membase); ++ ++ mediatek_gpio_irq = irq_of_parse_and_map(np, 0); ++ if (mediatek_gpio_irq) { ++ mediatek_gpio_irq_domain = irq_domain_add_linear(np, ++ MTK_MAX_BANK * MTK_BANK_WIDTH, ++ &irq_domain_ops, NULL); ++ if (!mediatek_gpio_irq_domain) ++ dev_err(&pdev->dev, "irq_domain_add_linear failed\n"); ++ } ++ ++ for_each_child_of_node(np, bank) ++ if (of_device_is_compatible(bank, "mtk,mt7621-gpio-bank")) ++ mediatek_gpio_bank_probe(pdev, bank); ++ ++ if (mediatek_gpio_irq_domain) ++ irq_set_chained_handler(mediatek_gpio_irq, mediatek_gpio_irq_handler); ++ ++ return 0; ++} ++ ++static const struct of_device_id mediatek_gpio_match[] = { ++ { .compatible = "mtk,mt7621-gpio" }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, mediatek_gpio_match); ++ ++static struct platform_driver mediatek_gpio_driver = { ++ .probe = mediatek_gpio_probe, ++ .driver = { ++ .name = "mt7621_gpio", ++ .owner = THIS_MODULE, ++ .of_match_table = mediatek_gpio_match, ++ }, ++}; ++ ++static int __init ++mediatek_gpio_init(void) ++{ ++ return platform_driver_register(&mediatek_gpio_driver); ++} ++ ++subsys_initcall(mediatek_gpio_init); |