diff options
Diffstat (limited to 'target/linux/brcm63xx/patches-2.6.33/211-nxp-74hc164-gpio-chip-driver.patch')
| -rw-r--r-- | target/linux/brcm63xx/patches-2.6.33/211-nxp-74hc164-gpio-chip-driver.patch | 279 |
1 files changed, 0 insertions, 279 deletions
diff --git a/target/linux/brcm63xx/patches-2.6.33/211-nxp-74hc164-gpio-chip-driver.patch b/target/linux/brcm63xx/patches-2.6.33/211-nxp-74hc164-gpio-chip-driver.patch deleted file mode 100644 index 3c4fe72fe..000000000 --- a/target/linux/brcm63xx/patches-2.6.33/211-nxp-74hc164-gpio-chip-driver.patch +++ /dev/null @@ -1,279 +0,0 @@ ---- a/drivers/gpio/Kconfig -+++ b/drivers/gpio/Kconfig -@@ -255,4 +255,12 @@ config GPIO_UCB1400 - To compile this driver as a module, choose M here: the - module will be called ucb1400_gpio. - -+comment "Other GPIO expanders" -+ -+config GPIO_NXP_74HC164 -+ tristate "NXP 74HC164 Output expanders" -+ help -+ Platform driver for NXP 74HC164 8-output Expanders. This -+ provides a GPIO interface supporting outputs. -+ - endif ---- a/drivers/gpio/Makefile -+++ b/drivers/gpio/Makefile -@@ -11,6 +11,7 @@ obj-$(CONFIG_GPIO_MAX7301) += max7301.o - obj-$(CONFIG_GPIO_MAX732X) += max732x.o - obj-$(CONFIG_GPIO_MC33880) += mc33880.o - obj-$(CONFIG_GPIO_MCP23S08) += mcp23s08.o -+obj-$(CONFIG_GPIO_NXP_74HC164) += nxp_74hc164.o - obj-$(CONFIG_GPIO_PCA953X) += pca953x.o - obj-$(CONFIG_GPIO_PCF857X) += pcf857x.o - obj-$(CONFIG_GPIO_PL061) += pl061.o ---- /dev/null -+++ b/drivers/gpio/nxp_74hc164.c -@@ -0,0 +1,226 @@ -+/* -+ * NXP 74HC164 - output expander GPIO driver -+ * -+ * Copyright (C) 2010 Gabor Juhos <juhosg@openwrt.org> -+ * Copyright (C) 2010 Miguel Gaio <miguel.gaio@efixo.com> -+ * -+ * 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. -+ * -+ * Copy from nxp_74hc153.c code -+ */ -+ -+#include <linux/module.h> -+#include <linux/init.h> -+#include <linux/gpio.h> -+#include <linux/bitops.h> -+#include <linux/platform_device.h> -+#include <linux/nxp_74hc164.h> -+ -+#define NXP_74HC164_NUM_GPIOS 8 -+ -+struct nxp_74hc164_chip { -+ struct device *parent; -+ struct gpio_chip gpio_chip; -+ struct mutex lock; -+ long mask; -+}; -+ -+static void nxp_74hc164_set_value(struct gpio_chip *, unsigned, int); -+ -+static struct nxp_74hc164_chip *gpio_to_nxp(struct gpio_chip *gc) -+{ -+ return container_of(gc, struct nxp_74hc164_chip, gpio_chip); -+} -+ -+static int nxp_74hc164_direction_input(struct gpio_chip *gc, unsigned offset) -+{ -+ WARN_ON(1); -+ return -EINVAL; -+} -+ -+static int nxp_74hc164_direction_output(struct gpio_chip *gc, -+ unsigned offset, int val) -+{ -+ nxp_74hc164_set_value(gc, offset, val); -+ return 0; -+} -+ -+static int nxp_74hc164_get_value(struct gpio_chip *gc, unsigned offset) -+{ -+ struct nxp_74hc164_chip *nxp = gpio_to_nxp(gc); -+ int ret; -+ -+ mutex_lock(&nxp->lock); -+ ret = test_bit(offset, &nxp->mask); -+ mutex_unlock(&nxp->lock); -+ -+ return ret; -+} -+ -+static void nxp_74hc164_set_value(struct gpio_chip *gc, -+ unsigned offset, int val) -+{ -+ struct nxp_74hc164_chip *nxp; -+ struct nxp_74hc164_platform_data *pdata; -+ long mask; -+ int refresh; -+ int i; -+ -+ nxp = gpio_to_nxp(gc); -+ pdata = nxp->parent->platform_data; -+ -+ mutex_lock(&nxp->lock); -+ if (val) -+ refresh = (test_and_set_bit(offset, &nxp->mask) != val); -+ else -+ refresh = (test_and_clear_bit(offset, &nxp->mask) != val); -+ -+ if (refresh) { -+ mask = nxp->mask; -+ for (i = 8; i > 0; --i, mask <<= 1) { -+ gpio_set_value(pdata->gpio_pin_data, mask & 0x80); -+ gpio_set_value(pdata->gpio_pin_clk, 1); -+ gpio_set_value(pdata->gpio_pin_clk, 0); -+ } -+ } -+ mutex_unlock(&nxp->lock); -+} -+ -+static int __devinit nxp_74hc164_probe(struct platform_device *pdev) -+{ -+ struct nxp_74hc164_platform_data *pdata; -+ struct nxp_74hc164_chip *nxp; -+ struct gpio_chip *gc; -+ int err; -+ -+ pdata = pdev->dev.platform_data; -+ if (pdata == NULL) { -+ dev_dbg(&pdev->dev, "no platform data specified\n"); -+ return -EINVAL; -+ } -+ -+ nxp = kzalloc(sizeof(struct nxp_74hc164_chip), GFP_KERNEL); -+ if (nxp == NULL) { -+ dev_err(&pdev->dev, "no memory for private data\n"); -+ return -ENOMEM; -+ } -+ -+ err = gpio_request(pdata->gpio_pin_clk, dev_name(&pdev->dev)); -+ if (err) { -+ dev_err(&pdev->dev, "unable to claim gpio %u, err=%d\n", -+ pdata->gpio_pin_clk, err); -+ goto err_free_nxp; -+ } -+ -+ err = gpio_request(pdata->gpio_pin_data, dev_name(&pdev->dev)); -+ if (err) { -+ dev_err(&pdev->dev, "unable to claim gpio %u, err=%d\n", -+ pdata->gpio_pin_data, err); -+ goto err_free_clk; -+ } -+ -+ err = gpio_direction_output(pdata->gpio_pin_clk, 0); -+ if (err) { -+ dev_err(&pdev->dev, -+ "unable to set direction of gpio %u, err=%d\n", -+ pdata->gpio_pin_clk, err); -+ goto err_free_data; -+ } -+ -+ err = gpio_direction_output(pdata->gpio_pin_data, 0); -+ if (err) { -+ dev_err(&pdev->dev, -+ "unable to set direction of gpio %u, err=%d\n", -+ pdata->gpio_pin_data, err); -+ goto err_free_data; -+ } -+ -+ nxp->parent = &pdev->dev; -+ mutex_init(&nxp->lock); -+ -+ gc = &nxp->gpio_chip; -+ -+ gc->direction_input = nxp_74hc164_direction_input; -+ gc->direction_output = nxp_74hc164_direction_output; -+ gc->get = nxp_74hc164_get_value; -+ gc->set = nxp_74hc164_set_value; -+ gc->can_sleep = 1; -+ -+ gc->base = pdata->gpio_base; -+ gc->ngpio = NXP_74HC164_NUM_GPIOS; -+ gc->label = dev_name(nxp->parent); -+ gc->dev = nxp->parent; -+ gc->owner = THIS_MODULE; -+ -+ err = gpiochip_add(&nxp->gpio_chip); -+ if (err) { -+ dev_err(&pdev->dev, "unable to add gpio chip, err=%d\n", err); -+ goto err_free_data; -+ } -+ -+ platform_set_drvdata(pdev, nxp); -+ return 0; -+ -+ err_free_data: -+ gpio_free(pdata->gpio_pin_data); -+ err_free_clk: -+ gpio_free(pdata->gpio_pin_clk); -+ err_free_nxp: -+ kfree(nxp); -+ return err; -+} -+ -+static int nxp_74hc164_remove(struct platform_device *pdev) -+{ -+ struct nxp_74hc164_chip *nxp = platform_get_drvdata(pdev); -+ struct nxp_74hc164_platform_data *pdata = pdev->dev.platform_data; -+ -+ if (nxp) { -+ int err; -+ -+ err = gpiochip_remove(&nxp->gpio_chip); -+ if (err) { -+ dev_err(&pdev->dev, -+ "unable to remove gpio chip, err=%d\n", -+ err); -+ return err; -+ } -+ -+ gpio_free(pdata->gpio_pin_clk); -+ gpio_free(pdata->gpio_pin_data); -+ -+ kfree(nxp); -+ platform_set_drvdata(pdev, NULL); -+ } -+ -+ return 0; -+} -+ -+static struct platform_driver nxp_74hc164_driver = { -+ .probe = nxp_74hc164_probe, -+ .remove = __devexit_p(nxp_74hc164_remove), -+ .driver = { -+ .name = NXP_74HC164_DRIVER_NAME, -+ .owner = THIS_MODULE, -+ }, -+}; -+ -+static int __init nxp_74hc164_init(void) -+{ -+ return platform_driver_register(&nxp_74hc164_driver); -+} -+subsys_initcall(nxp_74hc164_init); -+ -+static void __exit nxp_74hc164_exit(void) -+{ -+ platform_driver_unregister(&nxp_74hc164_driver); -+} -+module_exit(nxp_74hc164_exit); -+ -+MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>"); -+MODULE_AUTHOR("Miguel Gaio <miguel.gaio@efixo.com>"); -+MODULE_DESCRIPTION("GPIO expander driver for NXP 74HC164"); -+MODULE_LICENSE("GPL v2"); -+MODULE_ALIAS("platform:" NXP_74HC164_DRIVER_NAME); ---- /dev/null -+++ b/include/linux/nxp_74hc164.h -@@ -0,0 +1,22 @@ -+/* -+ * NXP 74HC164 - Dual 4-input multiplexer defines -+ * -+ * Copyright (C) 2010 Gabor Juhos <juhosg@openwrt.org> -+ * -+ * 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. -+ */ -+ -+#ifndef _NXP_74HC164_H -+#define _NXP_74HC164_H -+ -+#define NXP_74HC164_DRIVER_NAME "nxp-74hc164" -+ -+struct nxp_74hc164_platform_data { -+ unsigned gpio_base; -+ unsigned gpio_pin_data; -+ unsigned gpio_pin_clk; -+}; -+ -+#endif /* _NXP_74HC164_H */ |