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[ARM] MX1/MX2: simplify mxc_gpio_setup_multiple_pins 

mxc_gpio_setup_multiple_pins used to take several ALLOC_MODE flags. Most
of them are unused, so simplify the function by removing the flags. Also,
instead of using a confusing MXC_GPIO_ALLOC_MODE_RELEASE flag in a function
having alloc in its name, add a mxc_gpio_release_multiple_pins function.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2008-11-04 16:48:46 +01:00
parent d1900d3a18
commit 7bd1822135
4 changed files with 65 additions and 83 deletions
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61
arch/arm/mach-mx2/mx27ads.c
View File

@ -68,15 +68,14 @@ static int mxc_uart0_pins[] = {
static int uart_mxc_port0_init(struct platform_device *pdev)
{
return mxc_gpio_setup_multiple_pins(mxc_uart0_pins,
ARRAY_SIZE(mxc_uart0_pins),
MXC_GPIO_ALLOC_MODE_NORMAL, "UART0");
ARRAY_SIZE(mxc_uart0_pins), "UART0");
}
static int uart_mxc_port0_exit(struct platform_device *pdev)
{
return mxc_gpio_setup_multiple_pins(mxc_uart0_pins,
ARRAY_SIZE(mxc_uart0_pins),
MXC_GPIO_ALLOC_MODE_RELEASE, "UART0");
mxc_gpio_release_multiple_pins(mxc_uart0_pins,
ARRAY_SIZE(mxc_uart0_pins));
return 0;
}
static int mxc_uart1_pins[] = {
@ -89,15 +88,14 @@ static int mxc_uart1_pins[] = {
static int uart_mxc_port1_init(struct platform_device *pdev)
{
return mxc_gpio_setup_multiple_pins(mxc_uart1_pins,
ARRAY_SIZE(mxc_uart1_pins),
MXC_GPIO_ALLOC_MODE_NORMAL, "UART1");
ARRAY_SIZE(mxc_uart1_pins), "UART1");
}
static int uart_mxc_port1_exit(struct platform_device *pdev)
{
return mxc_gpio_setup_multiple_pins(mxc_uart1_pins,
ARRAY_SIZE(mxc_uart1_pins),
MXC_GPIO_ALLOC_MODE_RELEASE, "UART1");
mxc_gpio_setup_release_pins(mxc_uart1_pins,
ARRAY_SIZE(mxc_uart1_pins));
return 0;
}
static int mxc_uart2_pins[] = {
@ -110,15 +108,14 @@ static int mxc_uart2_pins[] = {
static int uart_mxc_port2_init(struct platform_device *pdev)
{
return mxc_gpio_setup_multiple_pins(mxc_uart2_pins,
ARRAY_SIZE(mxc_uart2_pins),
MXC_GPIO_ALLOC_MODE_NORMAL, "UART2");
ARRAY_SIZE(mxc_uart2_pins), "UART2");
}
static int uart_mxc_port2_exit(struct platform_device *pdev)
{
return mxc_gpio_setup_multiple_pins(mxc_uart2_pins,
ARRAY_SIZE(mxc_uart2_pins),
MXC_GPIO_ALLOC_MODE_RELEASE, "UART2");
mxc_gpio_release_multiple_pins(mxc_uart2_pins,
ARRAY_SIZE(mxc_uart2_pins));
return 0;
}
static int mxc_uart3_pins[] = {
@ -131,15 +128,13 @@ static int mxc_uart3_pins[] = {
static int uart_mxc_port3_init(struct platform_device *pdev)
{
return mxc_gpio_setup_multiple_pins(mxc_uart3_pins,
ARRAY_SIZE(mxc_uart3_pins),
MXC_GPIO_ALLOC_MODE_NORMAL, "UART3");
ARRAY_SIZE(mxc_uart3_pins), "UART3");
}
static int uart_mxc_port3_exit(struct platform_device *pdev)
{
return mxc_gpio_setup_multiple_pins(mxc_uart3_pins,
ARRAY_SIZE(mxc_uart3_pins),
MXC_GPIO_ALLOC_MODE_RELEASE, "UART3");
mxc_gpio_release_multiple_pins(mxc_uart3_pins,
ARRAY_SIZE(mxc_uart3_pins));
}
static int mxc_uart4_pins[] = {
@ -152,15 +147,14 @@ static int mxc_uart4_pins[] = {
static int uart_mxc_port4_init(struct platform_device *pdev)
{
return mxc_gpio_setup_multiple_pins(mxc_uart4_pins,
ARRAY_SIZE(mxc_uart4_pins),
MXC_GPIO_ALLOC_MODE_NORMAL, "UART4");
ARRAY_SIZE(mxc_uart4_pins), "UART4");
}
static int uart_mxc_port4_exit(struct platform_device *pdev)
{
return mxc_gpio_setup_multiple_pins(mxc_uart4_pins,
ARRAY_SIZE(mxc_uart4_pins),
MXC_GPIO_ALLOC_MODE_RELEASE, "UART4");
mxc_gpio_release_multiple_pins(mxc_uart4_pins,
ARRAY_SIZE(mxc_uart4_pins));
return 0;
}
static int mxc_uart5_pins[] = {
@ -173,15 +167,14 @@ static int mxc_uart5_pins[] = {
static int uart_mxc_port5_init(struct platform_device *pdev)
{
return mxc_gpio_setup_multiple_pins(mxc_uart5_pins,
ARRAY_SIZE(mxc_uart5_pins),
MXC_GPIO_ALLOC_MODE_NORMAL, "UART5");
ARRAY_SIZE(mxc_uart5_pins), "UART5");
}
static int uart_mxc_port5_exit(struct platform_device *pdev)
{
return mxc_gpio_setup_multiple_pins(mxc_uart5_pins,
ARRAY_SIZE(mxc_uart5_pins),
MXC_GPIO_ALLOC_MODE_RELEASE, "UART5");
mxc_gpio_release_multiple_pins(mxc_uart5_pins,
ARRAY_SIZE(mxc_uart5_pins));
return 0;
}
static struct platform_device *platform_devices[] __initdata = {
@ -212,15 +205,13 @@ static int mxc_fec_pins[] = {
static void gpio_fec_active(void)
{
mxc_gpio_setup_multiple_pins(mxc_fec_pins,
ARRAY_SIZE(mxc_fec_pins),
MXC_GPIO_ALLOC_MODE_NORMAL, "FEC");
ARRAY_SIZE(mxc_fec_pins), "FEC");
}
static void gpio_fec_inactive(void)
{
mxc_gpio_setup_multiple_pins(mxc_fec_pins,
ARRAY_SIZE(mxc_fec_pins),
MXC_GPIO_ALLOC_MODE_RELEASE, "FEC");
mxc_gpio_release_multiple_pins(mxc_fec_pins,
ARRAY_SIZE(mxc_fec_pins));
}
static struct imxuart_platform_data uart_pdata[] = {

35
arch/arm/mach-mx2/pcm038.c
View File

@ -64,15 +64,14 @@ static int mxc_uart0_pins[] = {
static int uart_mxc_port0_init(struct platform_device *pdev)
{
return mxc_gpio_setup_multiple_pins(mxc_uart0_pins,
ARRAY_SIZE(mxc_uart0_pins),
MXC_GPIO_ALLOC_MODE_NORMAL, "UART0");
ARRAY_SIZE(mxc_uart0_pins), "UART0");
}
static int uart_mxc_port0_exit(struct platform_device *pdev)
{
return mxc_gpio_setup_multiple_pins(mxc_uart0_pins,
ARRAY_SIZE(mxc_uart0_pins),
MXC_GPIO_ALLOC_MODE_RELEASE, "UART0");
mxc_gpio_release_multiple_pins(mxc_uart0_pins,
ARRAY_SIZE(mxc_uart0_pins));
return 0;
}
static int mxc_uart1_pins[] = {
@ -85,15 +84,14 @@ static int mxc_uart1_pins[] = {
static int uart_mxc_port1_init(struct platform_device *pdev)
{
return mxc_gpio_setup_multiple_pins(mxc_uart1_pins,
ARRAY_SIZE(mxc_uart1_pins),
MXC_GPIO_ALLOC_MODE_NORMAL, "UART1");
ARRAY_SIZE(mxc_uart1_pins), "UART1");
}
static int uart_mxc_port1_exit(struct platform_device *pdev)
{
return mxc_gpio_setup_multiple_pins(mxc_uart1_pins,
ARRAY_SIZE(mxc_uart1_pins),
MXC_GPIO_ALLOC_MODE_RELEASE, "UART1");
mxc_gpio_release_multiple_pins(mxc_uart1_pins,
ARRAY_SIZE(mxc_uart1_pins));
return 0;
}
static int mxc_uart2_pins[] = { PE10_PF_UART3_CTS,
@ -104,15 +102,14 @@ static int mxc_uart2_pins[] = { PE10_PF_UART3_CTS,
static int uart_mxc_port2_init(struct platform_device *pdev)
{
return mxc_gpio_setup_multiple_pins(mxc_uart2_pins,
ARRAY_SIZE(mxc_uart2_pins),
MXC_GPIO_ALLOC_MODE_NORMAL, "UART2");
ARRAY_SIZE(mxc_uart2_pins), "UART2");
}
static int uart_mxc_port2_exit(struct platform_device *pdev)
{
return mxc_gpio_setup_multiple_pins(mxc_uart2_pins,
ARRAY_SIZE(mxc_uart2_pins),
MXC_GPIO_ALLOC_MODE_RELEASE, "UART2");
mxc_gpio_release_multiple_pins(mxc_uart2_pins,
ARRAY_SIZE(mxc_uart2_pins));
return 0;
}
static struct imxuart_platform_data uart_pdata[] = {
@ -155,15 +152,13 @@ static int mxc_fec_pins[] = {
static void gpio_fec_active(void)
{
mxc_gpio_setup_multiple_pins(mxc_fec_pins,
ARRAY_SIZE(mxc_fec_pins),
MXC_GPIO_ALLOC_MODE_NORMAL, "FEC");
ARRAY_SIZE(mxc_fec_pins), "FEC");
}
static void gpio_fec_inactive(void)
{
mxc_gpio_setup_multiple_pins(mxc_fec_pins,
ARRAY_SIZE(mxc_fec_pins),
MXC_GPIO_ALLOC_MODE_RELEASE, "FEC");
mxc_gpio_release_multiple_pins(mxc_fec_pins,
ARRAY_SIZE(mxc_fec_pins));
}
static struct platform_device *platform_devices[] __initdata = {

9
arch/arm/plat-mxc/include/mach/iomux-mx1-mx2.h
View File

@ -21,12 +21,6 @@
#include <linux/io.h>
#define MXC_GPIO_ALLOC_MODE_NORMAL 0
#define MXC_GPIO_ALLOC_MODE_NO_ALLOC 1
#define MXC_GPIO_ALLOC_MODE_TRY_ALLOC 2
#define MXC_GPIO_ALLOC_MODE_ALLOC_ONLY 4
#define MXC_GPIO_ALLOC_MODE_RELEASE 8
/*
* GPIO Module and I/O Multiplexer
* x = 0..3 for reg_A, reg_B, reg_C, reg_D
@ -103,7 +97,8 @@
extern void mxc_gpio_mode(int gpio_mode);
extern int mxc_gpio_setup_multiple_pins(const int *pin_list, unsigned count,
int alloc_mode, const char *label);
const char *label);
extern void mxc_gpio_release_multiple_pins(const int *pin_list, int count);
/*-------------------------------------------------------------------------*/

43
arch/arm/plat-mxc/iomux-mx1-mx2.c
View File

@ -110,12 +110,13 @@ void mxc_gpio_mode(int gpio_mode)
EXPORT_SYMBOL(mxc_gpio_mode);
int mxc_gpio_setup_multiple_pins(const int *pin_list, unsigned count,
int alloc_mode, const char *label)
const char *label)
{
const int *p = pin_list;
int i;
unsigned gpio;
unsigned mode;
int ret = -EINVAL;
for (i = 0; i < count; i++) {
gpio = *p & (GPIO_PIN_MASK | GPIO_PORT_MASK);
@ -124,33 +125,33 @@ int mxc_gpio_setup_multiple_pins(const int *pin_list, unsigned count,
if (gpio >= (GPIO_PORT_MAX + 1) * 32)
goto setup_error;
if (alloc_mode & MXC_GPIO_ALLOC_MODE_RELEASE)
gpio_free(gpio);
else if (!(alloc_mode & MXC_GPIO_ALLOC_MODE_NO_ALLOC))
if (gpio_request(gpio, label)
&& !(alloc_mode & MXC_GPIO_ALLOC_MODE_TRY_ALLOC))
goto setup_error;
ret = gpio_request(gpio, label);
if (ret)
goto setup_error;
if (!(alloc_mode & (MXC_GPIO_ALLOC_MODE_ALLOC_ONLY |
MXC_GPIO_ALLOC_MODE_RELEASE)))
mxc_gpio_mode(gpio | mode);
mxc_gpio_mode(gpio | mode);
p++;
}
return 0;
setup_error:
if (alloc_mode & (MXC_GPIO_ALLOC_MODE_NO_ALLOC |
MXC_GPIO_ALLOC_MODE_TRY_ALLOC))
return -EINVAL;
while (p != pin_list) {
p--;
gpio = *p & (GPIO_PIN_MASK | GPIO_PORT_MASK);
gpio_free(gpio);
}
return -EINVAL;
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;
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);