You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
178 lines
4.9 KiB
178 lines
4.9 KiB
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");
|
|
|