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gpio: loongson: Add Loongson-3A/3B GPIO driver support
Improve Loongson-2's GPIO driver to support Loongson-3A/3B, and update Loongson-3's default config file. Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Huacai Chen <chenhc@lemote.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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@ -1245,6 +1245,7 @@ config CPU_LOONGSON3
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select CPU_SUPPORTS_HUGEPAGES
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select CPU_SUPPORTS_HUGEPAGES
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select WEAK_ORDERING
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select WEAK_ORDERING
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select WEAK_REORDERING_BEYOND_LLSC
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select WEAK_REORDERING_BEYOND_LLSC
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select ARCH_REQUIRE_GPIOLIB
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help
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help
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The Loongson 3 processor implements the MIPS64R2 instruction
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The Loongson 3 processor implements the MIPS64R2 instruction
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set with many extensions.
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set with many extensions.
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@ -243,6 +243,7 @@ CONFIG_HW_RANDOM=y
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CONFIG_RAW_DRIVER=m
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CONFIG_RAW_DRIVER=m
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CONFIG_I2C_CHARDEV=y
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CONFIG_I2C_CHARDEV=y
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CONFIG_I2C_PIIX4=y
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CONFIG_I2C_PIIX4=y
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CONFIG_GPIO_LOONGSON=y
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CONFIG_SENSORS_LM75=m
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CONFIG_SENSORS_LM75=m
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CONFIG_SENSORS_LM93=m
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CONFIG_SENSORS_LM93=m
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CONFIG_SENSORS_W83627HF=m
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CONFIG_SENSORS_W83627HF=m
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@ -509,10 +509,10 @@ config GPIO_GRGPIO
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VHDL IP core library.
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VHDL IP core library.
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config GPIO_LOONGSON
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config GPIO_LOONGSON
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bool "Loongson-2 GPIO support"
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bool "Loongson-2/3 GPIO support"
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depends on CPU_LOONGSON2
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depends on CPU_LOONGSON2 || CPU_LOONGSON3
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help
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help
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driver for GPIO functionality on Loongson-2F processors.
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driver for GPIO functionality on Loongson-2F/3A/3B processors.
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config GPIO_TB10X
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config GPIO_TB10X
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bool
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bool
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@ -1,8 +1,10 @@
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/*
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/*
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* STLS2F GPIO Support
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* Loongson-2F/3A/3B GPIO Support
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*
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*
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* Copyright (c) 2008 Richard Liu, STMicroelectronics <richard.liu@st.com>
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* Copyright (c) 2008 Richard Liu, STMicroelectronics <richard.liu@st.com>
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* Copyright (c) 2008-2010 Arnaud Patard <apatard@mandriva.com>
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* Copyright (c) 2008-2010 Arnaud Patard <apatard@mandriva.com>
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* Copyright (c) 2013 Hongbing Hu <huhb@lemote.com>
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* Copyright (c) 2014 Huacai Chen <chenhc@lemote.com>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* it under the terms of the GNU General Public License as published by
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@ -20,11 +22,19 @@
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#include <linux/gpio.h>
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#include <linux/gpio.h>
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#define STLS2F_N_GPIO 4
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#define STLS2F_N_GPIO 4
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#define STLS2F_GPIO_IN_OFFSET 16
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#define STLS3A_N_GPIO 16
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#ifdef CONFIG_CPU_LOONGSON3
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#define LOONGSON_N_GPIO STLS3A_N_GPIO
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#else
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#define LOONGSON_N_GPIO STLS2F_N_GPIO
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#endif
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#define LOONGSON_GPIO_IN_OFFSET 16
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static DEFINE_SPINLOCK(gpio_lock);
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static DEFINE_SPINLOCK(gpio_lock);
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static int ls2f_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
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static int loongson_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
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{
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{
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u32 temp;
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u32 temp;
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u32 mask;
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u32 mask;
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@ -39,7 +49,7 @@ static int ls2f_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
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return 0;
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return 0;
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}
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}
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static int ls2f_gpio_direction_output(struct gpio_chip *chip,
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static int loongson_gpio_direction_output(struct gpio_chip *chip,
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unsigned gpio, int level)
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unsigned gpio, int level)
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{
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{
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u32 temp;
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u32 temp;
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@ -56,12 +66,12 @@ static int ls2f_gpio_direction_output(struct gpio_chip *chip,
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return 0;
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return 0;
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}
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}
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static int ls2f_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
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static int loongson_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
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{
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{
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u32 val;
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u32 val;
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u32 mask;
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u32 mask;
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mask = 1 << (gpio + STLS2F_GPIO_IN_OFFSET);
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mask = 1 << (gpio + LOONGSON_GPIO_IN_OFFSET);
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spin_lock(&gpio_lock);
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spin_lock(&gpio_lock);
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val = LOONGSON_GPIODATA;
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val = LOONGSON_GPIODATA;
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spin_unlock(&gpio_lock);
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spin_unlock(&gpio_lock);
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@ -69,7 +79,7 @@ static int ls2f_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
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return (val & mask) != 0;
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return (val & mask) != 0;
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}
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}
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static void ls2f_gpio_set_value(struct gpio_chip *chip,
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static void loongson_gpio_set_value(struct gpio_chip *chip,
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unsigned gpio, int value)
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unsigned gpio, int value)
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{
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{
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u32 val;
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u32 val;
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@ -87,19 +97,19 @@ static void ls2f_gpio_set_value(struct gpio_chip *chip,
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spin_unlock(&gpio_lock);
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spin_unlock(&gpio_lock);
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}
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}
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static struct gpio_chip ls2f_chip = {
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static struct gpio_chip loongson_chip = {
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.label = "ls2f",
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.label = "Loongson-gpio-chip",
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.direction_input = ls2f_gpio_direction_input,
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.direction_input = loongson_gpio_direction_input,
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.get = ls2f_gpio_get_value,
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.get = loongson_gpio_get_value,
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.direction_output = ls2f_gpio_direction_output,
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.direction_output = loongson_gpio_direction_output,
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.set = ls2f_gpio_set_value,
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.set = loongson_gpio_set_value,
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.base = 0,
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.base = 0,
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.ngpio = STLS2F_N_GPIO,
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.ngpio = LOONGSON_N_GPIO,
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.can_sleep = false,
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.can_sleep = false,
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};
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};
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static int __init ls2f_gpio_setup(void)
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static int __init loongson_gpio_setup(void)
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{
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{
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return gpiochip_add(&ls2f_chip);
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return gpiochip_add(&loongson_chip);
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}
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}
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arch_initcall(ls2f_gpio_setup);
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postcore_initcall(loongson_gpio_setup);
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