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arm/imx/iomux-v1: check for invalid modes in mxc_gpio_mode

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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>
This commit is contained in:
Uwe Kleine-König 2010-02-15 09:47:55 +01:00
parent e835d88e71
commit bac3fcfad5
4 changed files with 55 additions and 47 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/plat-mxc/Makefile
View File

@ -8,7 +8,6 @@ obj-y := irq.o clock.o gpio.o time.o devices.o cpu.o system.o
obj-$(CONFIG_ARCH_MX1) += dma-mx1-mx2.o
obj-$(CONFIG_ARCH_MX2) += dma-mx1-mx2.o
obj-$(CONFIG_IMX_HAVE_IOMUX_V1) += iomux-v1.o
CFLAGS_iomux-v1.o = -DIMX_NEEDS_DEPRECATED_SYMBOLS
obj-$(CONFIG_ARCH_MXC_IOMUX_V3) += iomux-v3.o
obj-$(CONFIG_MXC_PWM) += pwm.o
obj-$(CONFIG_USB_EHCI_MXC) += ehci.o

5
arch/arm/plat-mxc/include/mach/iomux-mx3.h
View File

@ -164,11 +164,6 @@ int mxc_iomux_mode(unsigned int pin_mode);
(((iomux_pin & IOMUX_GPIONUM_MASK) >> IOMUX_GPIONUM_SHIFT) + \
MXC_GPIO_IRQ_START)
/*
* The number of gpio devices among the pads
*/
#define GPIO_PORT_MAX 3
/*
* This enumeration is constructed based on the Section
* "sw_pad_ctl & sw_mux_ctl details" of the MX31 IC Spec. Each enumerated

17
arch/arm/plat-mxc/include/mach/iomux-v1.h
View File

@ -41,16 +41,9 @@
#define MXC_SWR(x) (0x3c + ((x) << 8))
#define MXC_PUEN(x) (0x40 + ((x) << 8))
#ifdef CONFIG_ARCH_MX1
# define GPIO_PORT_MAX 3
#endif
#ifdef CONFIG_ARCH_MX2
# define GPIO_PORT_MAX 5
#endif
#ifndef GPIO_PORT_MAX
# error "GPIO config port count unknown!"
#endif
#define MX1_NUM_GPIO_PORT 4
#define MX21_NUM_GPIO_PORT 6
#define MX27_NUM_GPIO_PORT 6
#define GPIO_PIN_MASK 0x1f
@ -102,9 +95,9 @@
#define IRQ_GPIOE(x) (IRQ_GPIOD(32) + x)
#define IRQ_GPIOF(x) (IRQ_GPIOE(32) + x)
extern void mxc_gpio_mode(int gpio_mode);
extern int mxc_gpio_mode(int gpio_mode);
extern int mxc_gpio_setup_multiple_pins(const int *pin_list, unsigned count,
const char *label);
const char *label);
extern void mxc_gpio_release_multiple_pins(const int *pin_list, int count);
#endif /* __MACH_IOMUX_V1_H__ */

79
arch/arm/plat-mxc/iomux-v1.c
View File

@ -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 @@ 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;
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 = 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;