From bac3fcfad565c9bbceeed8b607f140c29df97355 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Mon, 15 Feb 2010 09:47:55 +0100 Subject: arm/imx/iomux-v1: check for invalid modes in mxc_gpio_mode MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit mxc_gpio_mode checks for invalid pins and so it returns zero for success, -EINVAL for invalid pins. While at it, remove definitions of GPIO_PORT_MAX removed as they are unused now. Signed-off-by: Uwe Kleine-König --- arch/arm/plat-mxc/iomux-v1.c | 77 ++++++++++++++++++++++++++++---------------- 1 file changed, 49 insertions(+), 28 deletions(-) (limited to 'arch/arm/plat-mxc/iomux-v1.c') diff --git a/arch/arm/plat-mxc/iomux-v1.c b/arch/arm/plat-mxc/iomux-v1.c index 5798b35b6cb9..960a02cbcbaf 100644 --- a/arch/arm/plat-mxc/iomux-v1.c +++ b/arch/arm/plat-mxc/iomux-v1.c @@ -33,6 +33,7 @@ #include static void __iomem *imx_iomuxv1_baseaddr; +static unsigned imx_iomuxv1_numports; static inline unsigned long imx_iomuxv1_readl(unsigned offset) { @@ -120,7 +121,7 @@ static inline void imx_iomuxv1_set_iconfb( imx_iomuxv1_rmwl(offset, mask, value); } -void mxc_gpio_mode(int gpio_mode) +int mxc_gpio_mode(int gpio_mode) { unsigned int pin = gpio_mode & GPIO_PIN_MASK; unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT; @@ -128,6 +129,9 @@ void mxc_gpio_mode(int gpio_mode) unsigned int aout = (gpio_mode >> GPIO_AOUT_SHIFT) & 3; unsigned int bout = (gpio_mode >> GPIO_BOUT_SHIFT) & 3; + if (port >= imx_iomuxv1_numports) + return -EINVAL; + /* Pullup enable */ imx_iomuxv1_set_puen(port, pin, gpio_mode & GPIO_PUEN); @@ -145,50 +149,64 @@ void mxc_gpio_mode(int gpio_mode) imx_iomuxv1_set_iconfa(port, pin, aout); imx_iomuxv1_set_iconfb(port, pin, bout); + + return 0; } EXPORT_SYMBOL(mxc_gpio_mode); +static int imx_iomuxv1_setup_multiple(const int *list, unsigned count) +{ + size_t i; + int ret; + + for (i = 0; i < count; ++i) { + ret = mxc_gpio_mode(list[i]); + + if (ret) + return ret; + } + + return ret; +} + int mxc_gpio_setup_multiple_pins(const int *pin_list, unsigned count, const char *label) { - const int *p = pin_list; - int i; - unsigned gpio; - unsigned mode; - int ret = -EINVAL; + size_t i; + int ret; - for (i = 0; i < count; i++) { - gpio = *p & (GPIO_PIN_MASK | GPIO_PORT_MASK); - mode = *p & ~(GPIO_PIN_MASK | GPIO_PORT_MASK); - - if (gpio >= (GPIO_PORT_MAX + 1) * 32) - goto setup_error; + for (i = 0; i < count; ++i) { + unsigned gpio = pin_list[i] & (GPIO_PIN_MASK | GPIO_PORT_MASK); ret = gpio_request(gpio, label); if (ret) - goto setup_error; + goto err_gpio_request; + } - mxc_gpio_mode(gpio | mode); + ret = imx_iomuxv1_setup_multiple(pin_list, count); + if (ret) + goto err_setup; - p++; - } return 0; -setup_error: +err_setup: + BUG_ON(i != count); + +err_gpio_request: mxc_gpio_release_multiple_pins(pin_list, i); + return ret; } EXPORT_SYMBOL(mxc_gpio_setup_multiple_pins); void mxc_gpio_release_multiple_pins(const int *pin_list, int count) { - const int *p = pin_list; - int i; + size_t i; + + for (i = 0; i < count; ++i) { + unsigned gpio = pin_list[i] & (GPIO_PIN_MASK | GPIO_PORT_MASK); - for (i = 0; i < count; i++) { - unsigned gpio = *p & (GPIO_PIN_MASK | GPIO_PORT_MASK); gpio_free(gpio); - p++; } } EXPORT_SYMBOL(mxc_gpio_release_multiple_pins); @@ -196,19 +214,22 @@ EXPORT_SYMBOL(mxc_gpio_release_multiple_pins); static int imx_iomuxv1_init(void) { #ifdef CONFIG_ARCH_MX1 - if (cpu_is_mx1()) + if (cpu_is_mx1()) { imx_iomuxv1_baseaddr = MX1_IO_ADDRESS(MX1_GPIO_BASE_ADDR); - else + imx_iomuxv1_numports = MX1_NUM_GPIO_PORT; + } else #endif #ifdef CONFIG_MACH_MX21 - if (cpu_is_mx21()) + if (cpu_is_mx21()) { imx_iomuxv1_baseaddr = MX21_IO_ADDRESS(MX21_GPIO_BASE_ADDR); - else + imx_iomuxv1_numports = MX21_NUM_GPIO_PORT; + } else #endif #ifdef CONFIG_MACH_MX27 - if (cpu_is_mx27()) + if (cpu_is_mx27()) { imx_iomuxv1_baseaddr = MX27_IO_ADDRESS(MX27_GPIO_BASE_ADDR); - else + imx_iomuxv1_numports = MX27_NUM_GPIO_PORT; + } else #endif return -ENODEV; -- cgit v1.2.1