diff options
Diffstat (limited to 'target/linux/ramips/patches-3.10/0506-GPIO-ralink-add-mt7621-gpio-controller.patch')
| -rw-r--r-- | target/linux/ramips/patches-3.10/0506-GPIO-ralink-add-mt7621-gpio-controller.patch | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-3.10/0506-GPIO-ralink-add-mt7621-gpio-controller.patch b/target/linux/ramips/patches-3.10/0506-GPIO-ralink-add-mt7621-gpio-controller.patch new file mode 100644 index 0000000000..72048c57cc --- /dev/null +++ b/target/linux/ramips/patches-3.10/0506-GPIO-ralink-add-mt7621-gpio-controller.patch @@ -0,0 +1,228 @@ +From e19957560170d63c6a5f0b1d7ba63695e4d1f033 Mon Sep 17 00:00:00 2001 +From: John Crispin <blogic@openwrt.org> +Date: Mon, 2 Dec 2013 16:14:28 +0100 +Subject: [PATCH 506/507] GPIO: ralink: add mt7621 gpio controller + +Signed-off-by: John Crispin <blogic@openwrt.org> +--- + arch/mips/Kconfig | 1 + + drivers/gpio/Kconfig | 6 ++ + drivers/gpio/Makefile | 1 + + drivers/gpio/gpio-mt7621.c | 183 ++++++++++++++++++++++++++++++++++++++++++++ + 4 files changed, 191 insertions(+) + create mode 100644 drivers/gpio/gpio-mt7621.c + +Index: linux-3.10.21/drivers/gpio/Kconfig +=================================================================== +--- linux-3.10.21.orig/drivers/gpio/Kconfig 2013-12-09 19:56:09.376682007 +0100 ++++ linux-3.10.21/drivers/gpio/Kconfig 2013-12-09 19:58:35.372685422 +0100 +@@ -710,6 +710,12 @@ + Enable support for GPIO on intel MSIC controllers found in + intel MID devices + ++config GPIO_MT7621 ++ bool "Mediatek GPIO Support" ++ depends on RALINK && SOC_MT7621 ++ help ++ Say yes here to support the Mediatek SoC GPIO device ++ + comment "USB GPIO expanders:" + + config GPIO_VIPERBOARD +Index: linux-3.10.21/drivers/gpio/Makefile +=================================================================== +--- linux-3.10.21.orig/drivers/gpio/Makefile 2013-12-09 19:56:09.376682007 +0100 ++++ linux-3.10.21/drivers/gpio/Makefile 2013-12-09 19:56:09.760682017 +0100 +@@ -88,3 +88,4 @@ + obj-$(CONFIG_GPIO_WM8350) += gpio-wm8350.o + obj-$(CONFIG_GPIO_WM8994) += gpio-wm8994.o + obj-$(CONFIG_GPIO_XILINX) += gpio-xilinx.o ++obj-$(CONFIG_GPIO_MT7621) += gpio-mt7621.o +Index: linux-3.10.21/drivers/gpio/gpio-mt7621.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-3.10.21/drivers/gpio/gpio-mt7621.c 2013-12-09 19:56:09.760682017 +0100 +@@ -0,0 +1,183 @@ ++/* ++ * 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_BANK_WIDTH 32 ++ ++enum mediatek_gpio_reg { ++ GPIO_REG_CTRL = 0, ++ GPIO_REG_POL, ++ GPIO_REG_DATA, ++ GPIO_REG_DSET, ++ GPIO_REG_DCLR, ++}; ++ ++static void __iomem *mtk_gc_membase; ++ ++struct mtk_gc { ++ struct gpio_chip chip; ++ spinlock_t lock; ++ int bank; ++}; ++ ++int ++gpio_to_irq(unsigned gpio) ++{ ++ return -1; ++} ++ ++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, mtk_gc_membase + (reg * 0x10) + (rg->bank * 0x4)); ++} ++ ++static inline u32 ++mtk_gpio_r32(struct mtk_gc *rg, u8 reg) ++{ ++ return ioread32(mtk_gc_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_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) ++ return -ENOMEM; ++ ++ 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 = mediatek_gpio_get; ++ rg->chip.set = mediatek_gpio_set; ++ ++ /* 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 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); ++ ++ mtk_gc_membase = devm_request_and_ioremap(&pdev->dev, res); ++ if (IS_ERR(mtk_gc_membase)) ++ return PTR_ERR(mtk_gc_membase); ++ ++ for_each_child_of_node(np, bank) ++ if (of_device_is_compatible(bank, "mtk,mt7621-gpio-bank")) ++ mediatek_gpio_bank_probe(pdev, bank); ++ ++ 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); |