arm/imx/iomux-v1: check for invalid modes in mxc_gpio_mode
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 <u.kleine-koenig@pengutronix.de>
diff --git a/arch/arm/plat-mxc/iomux-v1.c b/arch/arm/plat-mxc/iomux-v1.c
index 5798b35..960a02c 100644
--- a/arch/arm/plat-mxc/iomux-v1.c
+++ b/arch/arm/plat-mxc/iomux-v1.c
@@ -33,6 +33,7 @@
#include <mach/iomux-v1.h>
static void __iomem *imx_iomuxv1_baseaddr;
+static unsigned imx_iomuxv1_numports;
static inline unsigned long imx_iomuxv1_readl(unsigned offset)
{
@@ -120,7 +121,7 @@
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 @@
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 @@
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;
-
- mxc_gpio_mode(gpio | mode);
-
- p++;
+ goto err_gpio_request;
}
+
+ ret = imx_iomuxv1_setup_multiple(pin_list, count);
+ if (ret)
+ goto err_setup;
+
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 = *p & (GPIO_PIN_MASK | GPIO_PORT_MASK);
+ for (i = 0; i < count; ++i) {
+ unsigned gpio = pin_list[i] & (GPIO_PIN_MASK | GPIO_PORT_MASK);
+
gpio_free(gpio);
- p++;
}
}
EXPORT_SYMBOL(mxc_gpio_release_multiple_pins);
@@ -196,19 +214,22 @@
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;