/branches/18.06.1/target/linux/brcm63xx/patches-4.14/374-gpio-add-a-simple-GPIO-driver-for-bcm63xx.patch |
@@ -0,0 +1,178 @@ |
From dbe94a8daaa63ef81b7414f2a17bca8e36dd6daa Mon Sep 17 00:00:00 2001 |
From: Jonas Gorski <jogo@openwrt.org> |
Date: Fri, 20 Feb 2015 19:55:32 +0100 |
Subject: [PATCH 1/6] gpio: add a simple GPIO driver for bcm63xx |
|
|
Signed-off-by: Jonas Gorski <jogo@openwrt.org> |
--- |
drivers/gpio/Kconfig | 8 +++ |
drivers/gpio/Makefile | 1 + |
drivers/gpio/gpio-bcm63xx.c | 135 +++++++++++++++++++++++++++++++++++++++++++ |
3 files changed, 131 insertions(+) |
create mode 100644 drivers/gpio/gpio-bcm63xx.c |
|
--- a/drivers/gpio/Kconfig |
+++ b/drivers/gpio/Kconfig |
@@ -134,6 +134,13 @@ config GPIO_BCM_KONA |
help |
Turn on GPIO support for Broadcom "Kona" chips. |
|
+config GPIO_BCM63XX |
+ bool "Broadcom BCM63XX GPIO" |
+ depends on MIPS || COMPILE_TEST |
+ select GPIO_GENERIC |
+ help |
+ Turn on GPIO support for Broadcom BCM63XX xDSL chips. |
+ |
config GPIO_BRCMSTB |
tristate "BRCMSTB GPIO support" |
default y if (ARCH_BRCMSTB || BMIPS_GENERIC) |
--- a/drivers/gpio/Makefile |
+++ b/drivers/gpio/Makefile |
@@ -34,6 +34,7 @@ obj-$(CONFIG_GPIO_ATH79) += gpio-ath79.o |
obj-$(CONFIG_GPIO_ASPEED) += gpio-aspeed.o |
obj-$(CONFIG_GPIO_AXP209) += gpio-axp209.o |
obj-$(CONFIG_GPIO_BCM_KONA) += gpio-bcm-kona.o |
+obj-$(CONFIG_GPIO_BCM63XX) += gpio-bcm63xx.o |
obj-$(CONFIG_GPIO_BD9571MWV) += gpio-bd9571mwv.o |
obj-$(CONFIG_GPIO_BRCMSTB) += gpio-brcmstb.o |
obj-$(CONFIG_GPIO_BT8XX) += gpio-bt8xx.o |
--- /dev/null |
+++ b/drivers/gpio/gpio-bcm63xx.c |
@@ -0,0 +1,135 @@ |
+/* |
+ * Driver for BCM63XX memory-mapped GPIO controllers, based on |
+ * Generic driver for memory-mapped GPIO controllers. |
+ * |
+ * Copyright 2008 MontaVista Software, Inc. |
+ * Copyright 2008,2010 Anton Vorontsov <cbouatmailru@gmail.com> |
+ * Copyright 2015 Jonas Gorski <jogo@openwrt.org> |
+ * |
+ * This program is free software; you can redistribute it and/or modify it |
+ * under the terms of the GNU General Public License as published by the |
+ * Free Software Foundation; either version 2 of the License, or (at your |
+ * option) any later version. |
+ */ |
+ |
+#include <linux/init.h> |
+#include <linux/err.h> |
+#include <linux/bug.h> |
+#include <linux/kernel.h> |
+#include <linux/module.h> |
+#include <linux/spinlock.h> |
+#include <linux/compiler.h> |
+#include <linux/types.h> |
+#include <linux/errno.h> |
+#include <linux/log2.h> |
+#include <linux/ioport.h> |
+#include <linux/io.h> |
+#include <linux/gpio.h> |
+#include <linux/gpio/driver.h> |
+#include <linux/slab.h> |
+#include <linux/platform_device.h> |
+#include <linux/mod_devicetable.h> |
+#include <linux/of.h> |
+#include <linux/of_irq.h> |
+#include <linux/of_gpio.h> |
+ |
+static int bcm63xx_gpio_to_irq(struct gpio_chip *chip, unsigned gpio) |
+{ |
+ char irq_name[7]; /* "gpioXX" */ |
+ |
+ sprintf(irq_name, "gpio%d", gpio); |
+ return of_irq_get_byname(chip->of_node, irq_name); |
+} |
+ |
+static int bcm63xx_gpio_probe(struct platform_device *pdev) |
+{ |
+ struct device *dev = &pdev->dev; |
+ struct resource *dat_r, *dirout_r; |
+ void __iomem *dat; |
+ void __iomem *dirout; |
+ unsigned long sz; |
+ int err; |
+ struct gpio_chip *gc; |
+ struct bgpio_pdata *pdata = dev_get_platdata(dev); |
+ |
+ dirout_r = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
+ dat_r = platform_get_resource(pdev, IORESOURCE_MEM, 1); |
+ if (!dat_r || !dirout_r) |
+ return -EINVAL; |
+ |
+ if (resource_size(dat_r) != resource_size(dirout_r)) |
+ return -EINVAL; |
+ |
+ sz = resource_size(dat_r); |
+ |
+ dat = devm_ioremap_resource(dev, dat_r); |
+ if (IS_ERR(dat)) |
+ return PTR_ERR(dat); |
+ |
+ dirout = devm_ioremap_resource(dev, dirout_r); |
+ if (IS_ERR(dirout)) |
+ return PTR_ERR(dirout); |
+ |
+ gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL); |
+ if (!gc) |
+ return -ENOMEM; |
+ |
+ err = bgpio_init(gc, dev, sz, dat, NULL, NULL, dirout, NULL, |
+ BGPIOF_BIG_ENDIAN_BYTE_ORDER); |
+ if (err) |
+ return err; |
+ |
+ platform_set_drvdata(pdev, gc); |
+ |
+ if (dev->of_node) { |
+ int id = of_alias_get_id(dev->of_node, "gpio"); |
+ u32 ngpios; |
+ |
+ if (id >= 0) |
+ gc->label = devm_kasprintf(dev, GFP_KERNEL, |
+ "bcm63xx-gpio.%d", id); |
+ |
+ if (!of_property_read_u32(dev->of_node, "ngpios", &ngpios)) |
+ gc->ngpio = ngpios; |
+ |
+ if (of_get_property(dev->of_node, "interrupt-names", NULL)) |
+ gc->to_irq = bcm63xx_gpio_to_irq; |
+ |
+ } else if (pdata) { |
+ gc->base = pdata->base; |
+ if (pdata->ngpio > 0) |
+ gc->ngpio = pdata->ngpio; |
+ } |
+ |
+ return gpiochip_add(gc); |
+} |
+ |
+static int bcm63xx_gpio_remove(struct platform_device *pdev) |
+{ |
+ struct gpio_chip *gc = platform_get_drvdata(pdev); |
+ |
+ gpiochip_remove(gc); |
+ return 0; |
+} |
+ |
+#ifdef CONFIG_OF |
+static struct of_device_id bcm63xx_gpio_of_match[] = { |
+ { .compatible = "brcm,bcm6345-gpio" }, |
+ { }, |
+}; |
+#endif |
+ |
+static struct platform_driver bcm63xx_gpio_driver = { |
+ .probe = bcm63xx_gpio_probe, |
+ .remove = bcm63xx_gpio_remove, |
+ .driver = { |
+ .name = "bcm63xx-gpio", |
+ .of_match_table = of_match_ptr(bcm63xx_gpio_of_match), |
+ }, |
+}; |
+ |
+module_platform_driver(bcm63xx_gpio_driver); |
+ |
+MODULE_DESCRIPTION("Driver for BCM63XX memory-mapped GPIO controllers"); |
+MODULE_AUTHOR("Jonas Gorski <jogo@openwrt.org>"); |
+MODULE_LICENSE("GPL"); |