diff options
Diffstat (limited to 'target/linux/ath25/patches-4.9/107-ar5312_gpio.patch')
| -rw-r--r-- | target/linux/ath25/patches-4.9/107-ar5312_gpio.patch | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/target/linux/ath25/patches-4.9/107-ar5312_gpio.patch b/target/linux/ath25/patches-4.9/107-ar5312_gpio.patch new file mode 100644 index 0000000000..f4426b52c5 --- /dev/null +++ b/target/linux/ath25/patches-4.9/107-ar5312_gpio.patch @@ -0,0 +1,212 @@ +--- a/arch/mips/ath25/Kconfig ++++ b/arch/mips/ath25/Kconfig +@@ -1,6 +1,7 @@ + config SOC_AR5312 + bool "Atheros AR5312/AR2312+ SoC support" + depends on ATH25 ++ select GPIO_AR5312 + default y + + config SOC_AR2315 +--- a/arch/mips/ath25/ar5312.c ++++ b/arch/mips/ath25/ar5312.c +@@ -22,6 +22,7 @@ + #include <linux/platform_device.h> + #include <linux/mtd/physmap.h> + #include <linux/reboot.h> ++#include <linux/gpio.h> + #include <asm/bootinfo.h> + #include <asm/reboot.h> + #include <asm/time.h> +@@ -180,6 +181,22 @@ static struct platform_device ar5312_phy + .num_resources = 1, + }; + ++static struct resource ar5312_gpio_res[] = { ++ { ++ .name = "ar5312-gpio", ++ .flags = IORESOURCE_MEM, ++ .start = AR5312_GPIO_BASE, ++ .end = AR5312_GPIO_BASE + AR5312_GPIO_SIZE - 1, ++ }, ++}; ++ ++static struct platform_device ar5312_gpio = { ++ .name = "ar5312-gpio", ++ .id = -1, ++ .resource = ar5312_gpio_res, ++ .num_resources = ARRAY_SIZE(ar5312_gpio_res), ++}; ++ + static void __init ar5312_flash_init(void) + { + void __iomem *flashctl_base; +@@ -247,6 +264,8 @@ void __init ar5312_init_devices(void) + + platform_device_register(&ar5312_physmap_flash); + ++ platform_device_register(&ar5312_gpio); ++ + switch (ath25_soc) { + case ATH25_SOC_AR5312: + if (!ath25_board.radio) +--- a/drivers/gpio/Kconfig ++++ b/drivers/gpio/Kconfig +@@ -105,6 +105,13 @@ config GPIO_AMDPT + driver for GPIO functionality on Promontory IOHub + Require ACPI ASL code to enumerate as a platform device. + ++config GPIO_AR5312 ++ bool "AR5312 SoC GPIO support" ++ default y if SOC_AR5312 ++ depends on SOC_AR5312 ++ help ++ Say yes here to enable GPIO support for Atheros AR5312/AR2312+ SoCs. ++ + config GPIO_ASPEED + tristate "Aspeed GPIO support" + depends on (ARCH_ASPEED || COMPILE_TEST) && OF_GPIO +--- a/drivers/gpio/Makefile ++++ b/drivers/gpio/Makefile +@@ -26,6 +26,7 @@ obj-$(CONFIG_GPIO_ADP5588) += gpio-adp55 + obj-$(CONFIG_GPIO_ALTERA) += gpio-altera.o + obj-$(CONFIG_GPIO_AMD8111) += gpio-amd8111.o + obj-$(CONFIG_GPIO_AMDPT) += gpio-amdpt.o ++obj-$(CONFIG_GPIO_AR5312) += gpio-ar5312.o + obj-$(CONFIG_GPIO_ARIZONA) += gpio-arizona.o + obj-$(CONFIG_GPIO_ATH79) += gpio-ath79.o + obj-$(CONFIG_GPIO_ASPEED) += gpio-aspeed.o +--- /dev/null ++++ b/drivers/gpio/gpio-ar5312.c +@@ -0,0 +1,121 @@ ++/* ++ * This file is subject to the terms and conditions of the GNU General Public ++ * License. See the file "COPYING" in the main directory of this archive ++ * for more details. ++ * ++ * Copyright (C) 2003 Atheros Communications, Inc., All Rights Reserved. ++ * Copyright (C) 2006 FON Technology, SL. ++ * Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org> ++ * Copyright (C) 2006-2009 Felix Fietkau <nbd@nbd.name> ++ * Copyright (C) 2012 Alexandros C. Couloumbis <alex@ozo.com> ++ */ ++ ++#include <linux/kernel.h> ++#include <linux/init.h> ++#include <linux/platform_device.h> ++#include <linux/gpio.h> ++ ++#define DRIVER_NAME "ar5312-gpio" ++ ++#define AR5312_GPIO_DO 0x00 /* output register */ ++#define AR5312_GPIO_DI 0x04 /* intput register */ ++#define AR5312_GPIO_CR 0x08 /* control register */ ++ ++#define AR5312_GPIO_CR_M(x) (1 << (x)) /* mask for i/o */ ++#define AR5312_GPIO_CR_O(x) (0 << (x)) /* mask for output */ ++#define AR5312_GPIO_CR_I(x) (1 << (x)) /* mask for input */ ++#define AR5312_GPIO_CR_INT(x) (1 << ((x)+8)) /* mask for interrupt */ ++#define AR5312_GPIO_CR_UART(x) (1 << ((x)+16)) /* uart multiplex */ ++ ++#define AR5312_GPIO_NUM 8 ++ ++static void __iomem *ar5312_mem; ++ ++static inline u32 ar5312_gpio_reg_read(unsigned reg) ++{ ++ return __raw_readl(ar5312_mem + reg); ++} ++ ++static inline void ar5312_gpio_reg_write(unsigned reg, u32 val) ++{ ++ __raw_writel(val, ar5312_mem + reg); ++} ++ ++static inline void ar5312_gpio_reg_mask(unsigned reg, u32 mask, u32 val) ++{ ++ ar5312_gpio_reg_write(reg, (ar5312_gpio_reg_read(reg) & ~mask) | val); ++} ++ ++static int ar5312_gpio_get_val(struct gpio_chip *chip, unsigned gpio) ++{ ++ return (ar5312_gpio_reg_read(AR5312_GPIO_DI) >> gpio) & 1; ++} ++ ++static void ar5312_gpio_set_val(struct gpio_chip *chip, unsigned gpio, int val) ++{ ++ u32 reg = ar5312_gpio_reg_read(AR5312_GPIO_DO); ++ ++ reg = val ? reg | (1 << gpio) : reg & ~(1 << gpio); ++ ar5312_gpio_reg_write(AR5312_GPIO_DO, reg); ++} ++ ++static int ar5312_gpio_dir_in(struct gpio_chip *chip, unsigned gpio) ++{ ++ ar5312_gpio_reg_mask(AR5312_GPIO_CR, 0, 1 << gpio); ++ return 0; ++} ++ ++static int ar5312_gpio_dir_out(struct gpio_chip *chip, unsigned gpio, int val) ++{ ++ ar5312_gpio_reg_mask(AR5312_GPIO_CR, 1 << gpio, 0); ++ ar5312_gpio_set_val(chip, gpio, val); ++ return 0; ++} ++ ++static struct gpio_chip ar5312_gpio_chip = { ++ .label = DRIVER_NAME, ++ .direction_input = ar5312_gpio_dir_in, ++ .direction_output = ar5312_gpio_dir_out, ++ .set = ar5312_gpio_set_val, ++ .get = ar5312_gpio_get_val, ++ .base = 0, ++ .ngpio = AR5312_GPIO_NUM, ++}; ++ ++static int ar5312_gpio_probe(struct platform_device *pdev) ++{ ++ struct device *dev = &pdev->dev; ++ struct resource *res; ++ int ret; ++ ++ if (ar5312_mem) ++ return -EBUSY; ++ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ ar5312_mem = devm_ioremap_resource(dev, res); ++ if (IS_ERR(ar5312_mem)) ++ return PTR_ERR(ar5312_mem); ++ ++ ar5312_gpio_chip.dev = dev; ++ ret = gpiochip_add(&ar5312_gpio_chip); ++ if (ret) { ++ dev_err(dev, "failed to add gpiochip\n"); ++ return ret; ++ } ++ ++ return 0; ++} ++ ++static struct platform_driver ar5312_gpio_driver = { ++ .probe = ar5312_gpio_probe, ++ .driver = { ++ .name = DRIVER_NAME, ++ .owner = THIS_MODULE, ++ } ++}; ++ ++static int __init ar5312_gpio_init(void) ++{ ++ return platform_driver_register(&ar5312_gpio_driver); ++} ++subsys_initcall(ar5312_gpio_init); +--- a/arch/mips/Kconfig ++++ b/arch/mips/Kconfig +@@ -167,6 +167,7 @@ config ATH25 + select CEVT_R4K + select CSRC_R4K + select DMA_NONCOHERENT ++ select GPIOLIB + select IRQ_MIPS_CPU + select IRQ_DOMAIN + select SYS_HAS_CPU_MIPS32_R1 |