From 3f8c50c9b110dad4136ea7226cd87b0c4cdb70c8 Mon Sep 17 00:00:00 2001 From: John Crispin Date: Tue, 28 Aug 2012 12:44:59 +0200 Subject: OF: pinctrl: MIPS: lantiq: implement lantiq/xway pinctrl support Implement support for pinctrl on lantiq/xway socs. The IO core found on these socs has the registers for pinctrl, pinconf and gpio mixed up in the same register range. As the gpio_chip handling is only a few lines, the driver also implements the gpio functionality. This obseletes the old gpio driver that was located in the arch/ folder. Signed-off-by: John Crispin Acked-by: Linus Walleij Cc: devicetree-discuss@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org --- arch/mips/lantiq/Kconfig | 1 + arch/mips/lantiq/xway/Makefile | 2 +- arch/mips/lantiq/xway/gpio.c | 183 ----------------------------------------- 3 files changed, 2 insertions(+), 184 deletions(-) delete mode 100644 arch/mips/lantiq/xway/gpio.c (limited to 'arch/mips/lantiq') diff --git a/arch/mips/lantiq/Kconfig b/arch/mips/lantiq/Kconfig index 20bdf40b3efa..080c01349f9f 100644 --- a/arch/mips/lantiq/Kconfig +++ b/arch/mips/lantiq/Kconfig @@ -2,6 +2,7 @@ if LANTIQ config SOC_TYPE_XWAY bool + select PINCTRL_XWAY default n choice diff --git a/arch/mips/lantiq/xway/Makefile b/arch/mips/lantiq/xway/Makefile index f7053b89ad11..70a58c747bd0 100644 --- a/arch/mips/lantiq/xway/Makefile +++ b/arch/mips/lantiq/xway/Makefile @@ -1 +1 @@ -obj-y := prom.o sysctrl.o clk.o reset.o gpio.o dma.o gptu.o +obj-y := prom.o sysctrl.o clk.o reset.o dma.o gptu.o diff --git a/arch/mips/lantiq/xway/gpio.c b/arch/mips/lantiq/xway/gpio.c deleted file mode 100644 index 2ab39e93d9be..000000000000 --- a/arch/mips/lantiq/xway/gpio.c +++ /dev/null @@ -1,183 +0,0 @@ -/* - * 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) 2010 John Crispin - */ - -#include -#include -#include -#include -#include -#include - -#include - -#define LTQ_GPIO_OUT 0x00 -#define LTQ_GPIO_IN 0x04 -#define LTQ_GPIO_DIR 0x08 -#define LTQ_GPIO_ALTSEL0 0x0C -#define LTQ_GPIO_ALTSEL1 0x10 -#define LTQ_GPIO_OD 0x14 - -#define PINS_PER_PORT 16 -#define MAX_PORTS 3 - -#define ltq_gpio_getbit(m, r, p) (!!(ltq_r32(m + r) & (1 << p))) -#define ltq_gpio_setbit(m, r, p) ltq_w32_mask(0, (1 << p), m + r) -#define ltq_gpio_clearbit(m, r, p) ltq_w32_mask((1 << p), 0, m + r) - -struct ltq_gpio { - void __iomem *membase; - struct gpio_chip chip; -}; - -static struct ltq_gpio ltq_gpio_port[MAX_PORTS]; - -int ltq_gpio_request(unsigned int pin, unsigned int alt0, - unsigned int alt1, unsigned int dir, const char *name) -{ - int id = 0; - - if (pin >= (MAX_PORTS * PINS_PER_PORT)) - return -EINVAL; - if (gpio_request(pin, name)) { - pr_err("failed to setup lantiq gpio: %s\n", name); - return -EBUSY; - } - if (dir) - gpio_direction_output(pin, 1); - else - gpio_direction_input(pin); - while (pin >= PINS_PER_PORT) { - pin -= PINS_PER_PORT; - id++; - } - if (alt0) - ltq_gpio_setbit(ltq_gpio_port[id].membase, - LTQ_GPIO_ALTSEL0, pin); - else - ltq_gpio_clearbit(ltq_gpio_port[id].membase, - LTQ_GPIO_ALTSEL0, pin); - if (alt1) - ltq_gpio_setbit(ltq_gpio_port[id].membase, - LTQ_GPIO_ALTSEL1, pin); - else - ltq_gpio_clearbit(ltq_gpio_port[id].membase, - LTQ_GPIO_ALTSEL1, pin); - return 0; -} -EXPORT_SYMBOL(ltq_gpio_request); - -static void ltq_gpio_set(struct gpio_chip *chip, unsigned int offset, int value) -{ - struct ltq_gpio *ltq_gpio = container_of(chip, struct ltq_gpio, chip); - - if (value) - ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_OUT, offset); - else - ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_OUT, offset); -} - -static int ltq_gpio_get(struct gpio_chip *chip, unsigned int offset) -{ - struct ltq_gpio *ltq_gpio = container_of(chip, struct ltq_gpio, chip); - - return ltq_gpio_getbit(ltq_gpio->membase, LTQ_GPIO_IN, offset); -} - -static int ltq_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) -{ - struct ltq_gpio *ltq_gpio = container_of(chip, struct ltq_gpio, chip); - - ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_OD, offset); - ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_DIR, offset); - - return 0; -} - -static int ltq_gpio_direction_output(struct gpio_chip *chip, - unsigned int offset, int value) -{ - struct ltq_gpio *ltq_gpio = container_of(chip, struct ltq_gpio, chip); - - ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_OD, offset); - ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_DIR, offset); - ltq_gpio_set(chip, offset, value); - - return 0; -} - -static int ltq_gpio_req(struct gpio_chip *chip, unsigned offset) -{ - struct ltq_gpio *ltq_gpio = container_of(chip, struct ltq_gpio, chip); - - ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_ALTSEL0, offset); - ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_ALTSEL1, offset); - return 0; -} - -static int ltq_gpio_probe(struct platform_device *pdev) -{ - struct resource *res; - - if (pdev->id >= MAX_PORTS) { - dev_err(&pdev->dev, "invalid gpio port %d\n", - pdev->id); - return -EINVAL; - } - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(&pdev->dev, "failed to get memory for gpio port %d\n", - pdev->id); - return -ENOENT; - } - res = devm_request_mem_region(&pdev->dev, res->start, - resource_size(res), dev_name(&pdev->dev)); - if (!res) { - dev_err(&pdev->dev, - "failed to request memory for gpio port %d\n", - pdev->id); - return -EBUSY; - } - ltq_gpio_port[pdev->id].membase = devm_ioremap_nocache(&pdev->dev, - res->start, resource_size(res)); - if (!ltq_gpio_port[pdev->id].membase) { - dev_err(&pdev->dev, "failed to remap memory for gpio port %d\n", - pdev->id); - return -ENOMEM; - } - ltq_gpio_port[pdev->id].chip.label = "ltq_gpio"; - ltq_gpio_port[pdev->id].chip.direction_input = ltq_gpio_direction_input; - ltq_gpio_port[pdev->id].chip.direction_output = - ltq_gpio_direction_output; - ltq_gpio_port[pdev->id].chip.get = ltq_gpio_get; - ltq_gpio_port[pdev->id].chip.set = ltq_gpio_set; - ltq_gpio_port[pdev->id].chip.request = ltq_gpio_req; - ltq_gpio_port[pdev->id].chip.base = PINS_PER_PORT * pdev->id; - ltq_gpio_port[pdev->id].chip.ngpio = PINS_PER_PORT; - platform_set_drvdata(pdev, <q_gpio_port[pdev->id]); - return gpiochip_add(<q_gpio_port[pdev->id].chip); -} - -static struct platform_driver -ltq_gpio_driver = { - .probe = ltq_gpio_probe, - .driver = { - .name = "ltq_gpio", - .owner = THIS_MODULE, - }, -}; - -int __init ltq_gpio_init(void) -{ - int ret = platform_driver_register(<q_gpio_driver); - - if (ret) - pr_info("ltq_gpio : Error registering platform driver!"); - return ret; -} - -postcore_initcall(ltq_gpio_init); -- cgit v1.2.3