From 77bb01d1919bcb6787d5cde9056936420288ab34 Mon Sep 17 00:00:00 2001 From: Gabor Juhos Date: Wed, 14 Mar 2012 10:45:23 +0100 Subject: [PATCH 28/47] MIPS: ath79: add GPIO support code for AR934X Signed-off-by: Gabor Juhos Acked-by: Luis R. Rodriguez Cc: linux-mips@linux-mips.org Cc: mcgrof@infradead.org Patchwork: https://patchwork.linux-mips.org/patch/3508/ Signed-off-by: Ralf Baechle --- arch/mips/ath79/gpio.c | 47 +++++++++++++++++++++++- arch/mips/include/asm/mach-ath79/ar71xx_regs.h | 1 + 2 files changed, 47 insertions(+), 1 deletions(-) --- a/arch/mips/ath79/gpio.c +++ b/arch/mips/ath79/gpio.c @@ -1,9 +1,12 @@ /* * Atheros AR71XX/AR724X/AR913X GPIO API support * - * Copyright (C) 2008-2010 Gabor Juhos + * Copyright (C) 2010-2011 Jaiganesh Narayanan + * Copyright (C) 2008-2011 Gabor Juhos * Copyright (C) 2008 Imre Kaloz * + * Parts of this file are based on Atheros' 2.6.15/2.6.31 BSP + * * 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. @@ -89,6 +92,42 @@ static int ath79_gpio_direction_output(s return 0; } +static int ar934x_gpio_direction_input(struct gpio_chip *chip, unsigned offset) +{ + void __iomem *base = ath79_gpio_base; + unsigned long flags; + + spin_lock_irqsave(&ath79_gpio_lock, flags); + + __raw_writel(__raw_readl(base + AR71XX_GPIO_REG_OE) | (1 << offset), + base + AR71XX_GPIO_REG_OE); + + spin_unlock_irqrestore(&ath79_gpio_lock, flags); + + return 0; +} + +static int ar934x_gpio_direction_output(struct gpio_chip *chip, unsigned offset, + int value) +{ + void __iomem *base = ath79_gpio_base; + unsigned long flags; + + spin_lock_irqsave(&ath79_gpio_lock, flags); + + if (value) + __raw_writel(1 << offset, base + AR71XX_GPIO_REG_SET); + else + __raw_writel(1 << offset, base + AR71XX_GPIO_REG_CLEAR); + + __raw_writel(__raw_readl(base + AR71XX_GPIO_REG_OE) & ~(1 << offset), + base + AR71XX_GPIO_REG_OE); + + spin_unlock_irqrestore(&ath79_gpio_lock, flags); + + return 0; +} + static struct gpio_chip ath79_gpio_chip = { .label = "ath79", .get = ath79_gpio_get_value, @@ -155,11 +194,17 @@ void __init ath79_gpio_init(void) ath79_gpio_count = AR913X_GPIO_COUNT; else if (soc_is_ar933x()) ath79_gpio_count = AR933X_GPIO_COUNT; + else if (soc_is_ar934x()) + ath79_gpio_count = AR934X_GPIO_COUNT; else BUG(); ath79_gpio_base = ioremap_nocache(AR71XX_GPIO_BASE, AR71XX_GPIO_SIZE); ath79_gpio_chip.ngpio = ath79_gpio_count; + if (soc_is_ar934x()) { + ath79_gpio_chip.direction_input = ar934x_gpio_direction_input; + ath79_gpio_chip.direction_output = ar934x_gpio_direction_output; + } err = gpiochip_add(&ath79_gpio_chip); if (err) --- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h +++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h @@ -367,5 +367,6 @@ #define AR724X_GPIO_COUNT 18 #define AR913X_GPIO_COUNT 22 #define AR933X_GPIO_COUNT 30 +#define AR934X_GPIO_COUNT 23 #endif /* __ASM_MACH_AR71XX_REGS_H */