[U-Boot] [PATCH v7 2/4] gpio: Modify common gpio.h to more closely match Linux
Joe Hershberger
joe.hershberger at ni.com
Wed Oct 12 05:50:13 CEST 2011
Change "int gp" to "unsigned gpio"
Update the 2 existing arm implementations to match the new API
Remove the gpio_toggle() implementation (never used)
Signed-off-by: Joe Hershberger <joe.hershberger at ni.com>
Cc: Joe Hershberger <joe.hershberger at gmail.com>
Cc: Kim Phillips <kim.phillips at freescale.com>
---
Changes for v6:
- Linuxize gpio API
Changes for v7:
- checkpatch compliance
drivers/gpio/da8xx_gpio.c | 62 +++++++++---------
drivers/gpio/tegra2_gpio.c | 157 +++++++++++++++++++++----------------------
include/asm-generic/gpio.h | 13 ++--
3 files changed, 114 insertions(+), 118 deletions(-)
diff --git a/drivers/gpio/da8xx_gpio.c b/drivers/gpio/da8xx_gpio.c
index 7a15614..31a213b 100644
--- a/drivers/gpio/da8xx_gpio.c
+++ b/drivers/gpio/da8xx_gpio.c
@@ -181,26 +181,26 @@ static const struct pinmux_config gpio_pinmux[] = {
{ pinmux(18), 8, 2 },
};
-int gpio_request(int gp, const char *label)
+int gpio_request(unsigned gpio, const char *label)
{
- if (gp >= MAX_NUM_GPIOS)
+ if (gpio >= MAX_NUM_GPIOS)
return -1;
- if (gpio_registry[gp].is_registered)
+ if (gpio_registry[gpio].is_registered)
return -1;
- gpio_registry[gp].is_registered = 1;
- strncpy(gpio_registry[gp].name, label, GPIO_NAME_SIZE);
- gpio_registry[gp].name[GPIO_NAME_SIZE - 1] = 0;
+ gpio_registry[gpio].is_registered = 1;
+ strncpy(gpio_registry[gpio].name, label, GPIO_NAME_SIZE);
+ gpio_registry[gpio].name[GPIO_NAME_SIZE - 1] = 0;
- davinci_configure_pin_mux(&gpio_pinmux[gp], 1);
+ davinci_configure_pin_mux(&gpio_pinmux[gpio], 1);
return 0;
}
-void gpio_free(int gp)
+void gpio_free(unsigned gpio)
{
- gpio_registry[gp].is_registered = 0;
+ gpio_registry[gpio].is_registered = 0;
}
void gpio_toggle_value(int gp)
@@ -211,60 +211,60 @@ void gpio_toggle_value(int gp)
gpio_set_value(gp, !gpio_get_value(gp));
}
-int gpio_direction_input(int gp)
+int gpio_direction_input(unsigned gpio)
{
struct davinci_gpio *bank;
- bank = GPIO_BANK(gp);
- setbits_le32(&bank->dir, 1U << GPIO_BIT(gp));
+ bank = GPIO_BANK(gpio);
+ setbits_le32(&bank->dir, 1U << GPIO_BIT(gpio));
return 0;
}
-int gpio_direction_output(int gp, int value)
+int gpio_direction_output(unsigned gpio, int value)
{
struct davinci_gpio *bank;
- bank = GPIO_BANK(gp);
- clrbits_le32(&bank->dir, 1U << GPIO_BIT(gp));
- gpio_set_value(gp, value);
+ bank = GPIO_BANK(gpio);
+ clrbits_le32(&bank->dir, 1U << GPIO_BIT(gpio));
+ gpio_set_value(gpio, value);
return 0;
}
-int gpio_get_value(int gp)
+int gpio_get_value(unsigned gpio)
{
struct davinci_gpio *bank;
unsigned int ip;
- bank = GPIO_BANK(gp);
- ip = in_le32(&bank->in_data) & (1U << GPIO_BIT(gp));
+ bank = GPIO_BANK(gpio);
+ ip = in_le32(&bank->in_data) & (1U << GPIO_BIT(gpio));
return ip ? 1 : 0;
}
-void gpio_set_value(int gp, int value)
+void gpio_set_value(unsigned gpio, int value)
{
struct davinci_gpio *bank;
- bank = GPIO_BANK(gp);
+ bank = GPIO_BANK(gpio);
if (value)
- bank->set_data = 1U << GPIO_BIT(gp);
+ bank->set_data = 1U << GPIO_BIT(gpio);
else
- bank->clr_data = 1U << GPIO_BIT(gp);
+ bank->clr_data = 1U << GPIO_BIT(gpio);
}
void gpio_info(void)
{
- int gp, dir, val;
+ unsigned gpio, dir, val;
struct davinci_gpio *bank;
- for (gp = 0; gp < MAX_NUM_GPIOS; ++gp) {
- bank = GPIO_BANK(gp);
- dir = in_le32(&bank->dir) & (1U << GPIO_BIT(gp));
- val = gpio_get_value(gp);
+ for (gpio = 0; gpio < MAX_NUM_GPIOS; ++gpio) {
+ bank = GPIO_BANK(gpio);
+ dir = in_le32(&bank->dir) & (1U << GPIO_BIT(gpio));
+ val = gpio_get_value(gpio);
printf("% 4d: %s: %d [%c] %s\n",
- gp, dir ? " in" : "out", val,
- gpio_registry[gp].is_registered ? 'x' : ' ',
- gpio_registry[gp].name);
+ gpio, dir ? " in" : "out", val,
+ gpio_registry[gpio].is_registered ? 'x' : ' ',
+ gpio_registry[gpio].name);
}
}
diff --git a/drivers/gpio/tegra2_gpio.c b/drivers/gpio/tegra2_gpio.c
index f686e80..187714e 100644
--- a/drivers/gpio/tegra2_gpio.c
+++ b/drivers/gpio/tegra2_gpio.c
@@ -49,186 +49,182 @@ static char *get_name(int i)
return *gpio_names[i].name ? gpio_names[i].name : "UNKNOWN";
}
-/* Return config of pin 'gp' as GPIO (1) or SFPIO (0) */
-static int get_config(int gp)
+/* Return config of pin 'gpio' as GPIO (1) or SFPIO (0) */
+static int get_config(unsigned gpio)
{
- struct gpio_ctlr *gpio = (struct gpio_ctlr *)NV_PA_GPIO_BASE;
- struct gpio_ctlr_bank *bank = &gpio->gpio_bank[GPIO_BANK(gp)];
+ struct gpio_ctlr *ctlr = (struct gpio_ctlr *)NV_PA_GPIO_BASE;
+ struct gpio_ctlr_bank *bank = &ctlr->gpio_bank[GPIO_BANK(gpio)];
u32 u;
int type;
- u = readl(&bank->gpio_config[GPIO_PORT(gp)]);
- type = (u >> GPIO_BIT(gp)) & 1;
+ u = readl(&bank->gpio_config[GPIO_PORT(gpio)]);
+ type = (u >> GPIO_BIT(gpio)) & 1;
debug("get_config: port = %d, bit = %d is %s\n",
- GPIO_FULLPORT(gp), GPIO_BIT(gp), type ? "GPIO" : "SFPIO");
+ GPIO_FULLPORT(gpio), GPIO_BIT(gpio), type ? "GPIO" : "SFPIO");
return type;
}
-/* Config pin 'gp' as GPIO or SFPIO, based on 'type' */
-static void set_config(int gp, int type)
+/* Config pin 'gpio' as GPIO or SFPIO, based on 'type' */
+static void set_config(unsigned gpio, int type)
{
- struct gpio_ctlr *gpio = (struct gpio_ctlr *)NV_PA_GPIO_BASE;
- struct gpio_ctlr_bank *bank = &gpio->gpio_bank[GPIO_BANK(gp)];
+ struct gpio_ctlr *ctlr = (struct gpio_ctlr *)NV_PA_GPIO_BASE;
+ struct gpio_ctlr_bank *bank = &ctlr->gpio_bank[GPIO_BANK(gpio)];
u32 u;
debug("set_config: port = %d, bit = %d, %s\n",
- GPIO_FULLPORT(gp), GPIO_BIT(gp), type ? "GPIO" : "SFPIO");
+ GPIO_FULLPORT(gpio), GPIO_BIT(gpio), type ? "GPIO" : "SFPIO");
- u = readl(&bank->gpio_config[GPIO_PORT(gp)]);
+ u = readl(&bank->gpio_config[GPIO_PORT(gpio)]);
if (type) /* GPIO */
- u |= 1 << GPIO_BIT(gp);
+ u |= 1 << GPIO_BIT(gpio);
else
- u &= ~(1 << GPIO_BIT(gp));
- writel(u, &bank->gpio_config[GPIO_PORT(gp)]);
+ u &= ~(1 << GPIO_BIT(gpio));
+ writel(u, &bank->gpio_config[GPIO_PORT(gpio)]);
}
-/* Return GPIO pin 'gp' direction - 0 = input or 1 = output */
-static int get_direction(int gp)
+/* Return GPIO pin 'gpio' direction - 0 = input or 1 = output */
+static int get_direction(unsigned gpio)
{
- struct gpio_ctlr *gpio = (struct gpio_ctlr *)NV_PA_GPIO_BASE;
- struct gpio_ctlr_bank *bank = &gpio->gpio_bank[GPIO_BANK(gp)];
+ struct gpio_ctlr *ctlr = (struct gpio_ctlr *)NV_PA_GPIO_BASE;
+ struct gpio_ctlr_bank *bank = &ctlr->gpio_bank[GPIO_BANK(gpio)];
u32 u;
int dir;
- u = readl(&bank->gpio_dir_out[GPIO_PORT(gp)]);
- dir = (u >> GPIO_BIT(gp)) & 1;
+ u = readl(&bank->gpio_dir_out[GPIO_PORT(gpio)]);
+ dir = (u >> GPIO_BIT(gpio)) & 1;
debug("get_direction: port = %d, bit = %d, %s\n",
- GPIO_FULLPORT(gp), GPIO_BIT(gp), dir ? "OUT" : "IN");
+ GPIO_FULLPORT(gpio), GPIO_BIT(gpio), dir ? "OUT" : "IN");
return dir;
}
-/* Config GPIO pin 'gp' as input or output (OE) as per 'output' */
-static void set_direction(int gp, int output)
+/* Config GPIO pin 'gpio' as input or output (OE) as per 'output' */
+static void set_direction(unsigned gpio, int output)
{
- struct gpio_ctlr *gpio = (struct gpio_ctlr *)NV_PA_GPIO_BASE;
- struct gpio_ctlr_bank *bank = &gpio->gpio_bank[GPIO_BANK(gp)];
+ struct gpio_ctlr *ctlr = (struct gpio_ctlr *)NV_PA_GPIO_BASE;
+ struct gpio_ctlr_bank *bank = &ctlr->gpio_bank[GPIO_BANK(gpio)];
u32 u;
debug("set_direction: port = %d, bit = %d, %s\n",
- GPIO_FULLPORT(gp), GPIO_BIT(gp), output ? "OUT" : "IN");
+ GPIO_FULLPORT(gpio), GPIO_BIT(gpio), output ? "OUT" : "IN");
- u = readl(&bank->gpio_dir_out[GPIO_PORT(gp)]);
+ u = readl(&bank->gpio_dir_out[GPIO_PORT(gpio)]);
if (output)
- u |= 1 << GPIO_BIT(gp);
+ u |= 1 << GPIO_BIT(gpio);
else
- u &= ~(1 << GPIO_BIT(gp));
- writel(u, &bank->gpio_dir_out[GPIO_PORT(gp)]);
+ u &= ~(1 << GPIO_BIT(gpio));
+ writel(u, &bank->gpio_dir_out[GPIO_PORT(gpio)]);
}
-/* set GPIO pin 'gp' output bit as 0 or 1 as per 'high' */
-static void set_level(int gp, int high)
+/* set GPIO pin 'gpio' output bit as 0 or 1 as per 'high' */
+static void set_level(unsigned gpio, int high)
{
- struct gpio_ctlr *gpio = (struct gpio_ctlr *)NV_PA_GPIO_BASE;
- struct gpio_ctlr_bank *bank = &gpio->gpio_bank[GPIO_BANK(gp)];
+ struct gpio_ctlr *ctlr = (struct gpio_ctlr *)NV_PA_GPIO_BASE;
+ struct gpio_ctlr_bank *bank = &ctlr->gpio_bank[GPIO_BANK(gpio)];
u32 u;
debug("set_level: port = %d, bit %d == %d\n",
- GPIO_FULLPORT(gp), GPIO_BIT(gp), high);
+ GPIO_FULLPORT(gpio), GPIO_BIT(gpio), high);
- u = readl(&bank->gpio_out[GPIO_PORT(gp)]);
+ u = readl(&bank->gpio_out[GPIO_PORT(gpio)]);
if (high)
- u |= 1 << GPIO_BIT(gp);
+ u |= 1 << GPIO_BIT(gpio);
else
- u &= ~(1 << GPIO_BIT(gp));
- writel(u, &bank->gpio_out[GPIO_PORT(gp)]);
+ u &= ~(1 << GPIO_BIT(gpio));
+ writel(u, &bank->gpio_out[GPIO_PORT(gpio)]);
}
/*
* Generic_GPIO primitives.
*/
-int gpio_request(int gp, const char *label)
+int gpio_request(unsigned gpio, const char *label)
{
- if (gp >= MAX_NUM_GPIOS)
+ if (gpio >= MAX_NUM_GPIOS)
return -1;
- strncpy(gpio_names[gp].name, label, GPIO_NAME_SIZE);
- gpio_names[gp].name[GPIO_NAME_SIZE - 1] = '\0';
+ strncpy(gpio_names[gpio].name, label, GPIO_NAME_SIZE);
+ gpio_names[gpio].name[GPIO_NAME_SIZE - 1] = '\0';
/* Configure as a GPIO */
- set_config(gp, 1);
+ set_config(gpio, 1);
return 0;
}
-void gpio_free(int gp)
+void gpio_free(unsigned gpio)
{
}
-/* read GPIO OUT value of pin 'gp' */
-static int gpio_get_output_value(int gp)
+/* read GPIO OUT value of pin 'gpio' */
+static int gpio_get_output_value(unsigned gpio)
{
- struct gpio_ctlr *gpio = (struct gpio_ctlr *)NV_PA_GPIO_BASE;
- struct gpio_ctlr_bank *bank = &gpio->gpio_bank[GPIO_BANK(gp)];
+ struct gpio_ctlr *ctlr = (struct gpio_ctlr *)NV_PA_GPIO_BASE;
+ struct gpio_ctlr_bank *bank = &ctlr->gpio_bank[GPIO_BANK(gpio)];
int val;
debug("gpio_get_output_value: pin = %d (port %d:bit %d)\n",
- gp, GPIO_FULLPORT(gp), GPIO_BIT(gp));
+ gpio, GPIO_FULLPORT(gpio), GPIO_BIT(gpio));
- val = readl(&bank->gpio_out[GPIO_PORT(gp)]);
+ val = readl(&bank->gpio_out[GPIO_PORT(gpio)]);
- return (val >> GPIO_BIT(gp)) & 1;
+ return (val >> GPIO_BIT(gpio)) & 1;
}
-void gpio_toggle_value(int gp)
-{
- gpio_set_value(gp, !gpio_get_output_value(gp));
-}
-
-/* set GPIO pin 'gp' as an input */
-int gpio_direction_input(int gp)
+/* set GPIO pin 'gpio' as an input */
+int gpio_direction_input(unsigned gpio)
{
debug("gpio_direction_input: pin = %d (port %d:bit %d)\n",
- gp, GPIO_FULLPORT(gp), GPIO_BIT(gp));
+ gpio, GPIO_FULLPORT(gpio), GPIO_BIT(gpio));
/* Configure GPIO direction as input. */
- set_direction(gp, 0);
+ set_direction(gpio, 0);
return 0;
}
-/* set GPIO pin 'gp' as an output, with polarity 'value' */
-int gpio_direction_output(int gp, int value)
+/* set GPIO pin 'gpio' as an output, with polarity 'value' */
+int gpio_direction_output(unsigned gpio, int value)
{
debug("gpio_direction_output: pin = %d (port %d:bit %d) = %s\n",
- gp, GPIO_FULLPORT(gp), GPIO_BIT(gp), value ? "HIGH" : "LOW");
+ gpio, GPIO_FULLPORT(gpio), GPIO_BIT(gpio),
+ value ? "HIGH" : "LOW");
/* Configure GPIO output value. */
- set_level(gp, value);
+ set_level(gpio, value);
/* Configure GPIO direction as output. */
- set_direction(gp, 1);
+ set_direction(gpio, 1);
return 0;
}
-/* read GPIO IN value of pin 'gp' */
-int gpio_get_value(int gp)
+/* read GPIO IN value of pin 'gpio' */
+int gpio_get_value(unsigned gpio)
{
- struct gpio_ctlr *gpio = (struct gpio_ctlr *)NV_PA_GPIO_BASE;
- struct gpio_ctlr_bank *bank = &gpio->gpio_bank[GPIO_BANK(gp)];
+ struct gpio_ctlr *ctlr = (struct gpio_ctlr *)NV_PA_GPIO_BASE;
+ struct gpio_ctlr_bank *bank = &ctlr->gpio_bank[GPIO_BANK(gpio)];
int val;
debug("gpio_get_value: pin = %d (port %d:bit %d)\n",
- gp, GPIO_FULLPORT(gp), GPIO_BIT(gp));
+ gpio, GPIO_FULLPORT(gpio), GPIO_BIT(gpio));
- val = readl(&bank->gpio_in[GPIO_PORT(gp)]);
+ val = readl(&bank->gpio_in[GPIO_PORT(gpio)]);
- return (val >> GPIO_BIT(gp)) & 1;
+ return (val >> GPIO_BIT(gpio)) & 1;
}
-/* write GPIO OUT value to pin 'gp' */
-void gpio_set_value(int gp, int value)
+/* write GPIO OUT value to pin 'gpio' */
+void gpio_set_value(unsigned gpio, int value)
{
debug("gpio_set_value: pin = %d (port %d:bit %d), value = %d\n",
- gp, GPIO_FULLPORT(gp), GPIO_BIT(gp), value);
+ gpio, GPIO_FULLPORT(gpio), GPIO_BIT(gpio), value);
/* Configure GPIO output value. */
- set_level(gp, value);
+ set_level(gpio, value);
}
/*
@@ -236,7 +232,8 @@ void gpio_set_value(int gp, int value)
*/
void gpio_info(void)
{
- int c, type;
+ unsigned c;
+ int type;
for (c = 0; c < MAX_NUM_GPIOS; c++) {
type = get_config(c); /* GPIO, not SFPIO */
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
index 57542ad..55a030d 100644
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -26,12 +26,11 @@
* Generic GPIO API
*/
-int gpio_request(int gp, const char *label);
-void gpio_free(int gp);
-void gpio_toggle_value(int gp);
-int gpio_direction_input(int gp);
-int gpio_direction_output(int gp, int value);
-int gpio_get_value(int gp);
-void gpio_set_value(int gp, int value);
+int gpio_request(unsigned gpio, const char *label);
+void gpio_free(unsigned gpio);
+int gpio_direction_input(unsigned gpio);
+int gpio_get_value(unsigned gpio);
+int gpio_direction_output(unsigned gpio, int value);
+void gpio_set_value(unsigned gpio, int value);
#endif /* _GPIO_H_ */
--
1.6.0.2
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