brain-hackers_pepepper-mirror/u-boot-brain
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Merge git://git.denx.de/u-boot-dm

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This commit is contained in:
Tom Rini 2014-09-02 08:22:26 -04:00
commit 141e1faec2
3 changed files with 96 additions and 37 deletions
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8
arch/sandbox/dts/sandbox.dts
View File

@ -113,4 +113,12 @@
0x070b0067 0x070c0069>; 0x070b0067 0x070c0069>;
}; };
gpio_a: gpios {
gpio-controller;
compatible = "sandbox,gpio";
#gpio-cells = <1>;
gpio-bank-name = "a";
num-gpios = <20>;
};
}; };

110
common/cmd_gpio.c
View File

@ -8,6 +8,7 @@
#include <common.h> #include <common.h>
#include <command.h> #include <command.h>
#include <errno.h>
#include <dm.h> #include <dm.h>
#include <asm/gpio.h> #include <asm/gpio.h>
@ -24,18 +25,46 @@ enum gpio_cmd {
}; };
#if defined(CONFIG_DM_GPIO) && !defined(gpio_status) #if defined(CONFIG_DM_GPIO) && !defined(gpio_status)
static const char * const gpio_function[] = { static const char * const gpio_function[GPIOF_COUNT] = {
"input", "input",
"output", "output",
"unused",
"unknown", "unknown",
"func",
}; };
static void show_gpio(struct udevice *dev, const char *bank_name, int offset) /* A few flags used by show_gpio() */
enum {
FLAG_SHOW_ALL = 1 << 0,
FLAG_SHOW_BANK = 1 << 1,
FLAG_SHOW_NEWLINE = 1 << 2,
};
static void show_gpio(struct udevice *dev, const char *bank_name, int offset,
int *flagsp)
{ {
struct dm_gpio_ops *ops = gpio_get_ops(dev); struct dm_gpio_ops *ops = gpio_get_ops(dev);
int func = GPIOF_UNKNOWN;
char buf[80]; char buf[80];
int ret; int ret;
BUILD_BUG_ON(GPIOF_COUNT != ARRAY_SIZE(gpio_function));
if (ops->get_function) {
ret = ops->get_function(dev, offset);
if (ret >= 0 && ret < ARRAY_SIZE(gpio_function))
func = ret;
}
if (!(*flagsp & FLAG_SHOW_ALL) && func == GPIOF_UNUSED)
return;
if ((*flagsp & FLAG_SHOW_BANK) && bank_name) {
if (*flagsp & FLAG_SHOW_NEWLINE) {
putc('\n');
*flagsp &= ~FLAG_SHOW_NEWLINE;
}
printf("Bank %s:\n", bank_name);
*flagsp &= ~FLAG_SHOW_BANK;
}
*buf = '\0'; *buf = '\0';
if (ops->get_state) { if (ops->get_state) {
ret = ops->get_state(dev, offset, buf, sizeof(buf)); ret = ops->get_state(dev, offset, buf, sizeof(buf));
@ -44,14 +73,6 @@ static void show_gpio(struct udevice *dev, const char *bank_name, int offset)
return; return;
} }
} else { } else {
int func = GPIOF_UNKNOWN;
int ret;
if (ops->get_function) {
ret = ops->get_function(dev, offset);
if (ret >= 0 && ret < ARRAY_SIZE(gpio_function))
func = ret;
}
sprintf(buf, "%s%u: %8s %d", bank_name, offset, sprintf(buf, "%s%u: %8s %d", bank_name, offset,
gpio_function[func], ops->get_value(dev, offset)); gpio_function[func], ops->get_value(dev, offset));
} }
@ -60,12 +81,14 @@ static void show_gpio(struct udevice *dev, const char *bank_name, int offset)
puts("\n"); puts("\n");
} }
static int do_gpio_status(const char *gpio_name) static int do_gpio_status(bool all, const char *gpio_name)
{ {
struct udevice *dev; struct udevice *dev;
int newline = 0; int banklen;
int flags;
int ret; int ret;
flags = 0;
if (gpio_name && !*gpio_name) if (gpio_name && !*gpio_name)
gpio_name = NULL; gpio_name = NULL;
for (ret = uclass_first_device(UCLASS_GPIO, &dev); for (ret = uclass_first_device(UCLASS_GPIO, &dev);
@ -74,28 +97,33 @@ static int do_gpio_status(const char *gpio_name)
const char *bank_name; const char *bank_name;
int num_bits; int num_bits;
flags |= FLAG_SHOW_BANK;
if (all)
flags |= FLAG_SHOW_ALL;
bank_name = gpio_get_bank_info(dev, &num_bits); bank_name = gpio_get_bank_info(dev, &num_bits);
if (!num_bits)
continue;
banklen = bank_name ? strlen(bank_name) : 0;
if (!gpio_name || !bank_name || if (!gpio_name || !bank_name ||
!strncmp(gpio_name, bank_name, strlen(bank_name))) { !strncmp(gpio_name, bank_name, banklen)) {
const char *p = NULL; const char *p = NULL;
int offset; int offset;
if (bank_name) { p = gpio_name + banklen;
if (newline) if (gpio_name && *p) {
putc('\n');
printf("Bank %s:\n", bank_name);
}
newline = 1;
if (gpio_name && bank_name) {
p = gpio_name + strlen(bank_name);
offset = simple_strtoul(p, NULL, 10); offset = simple_strtoul(p, NULL, 10);
show_gpio(dev, bank_name, offset); show_gpio(dev, bank_name, offset, &flags);
} else { } else {
for (offset = 0; offset < num_bits; offset++) for (offset = 0; offset < num_bits; offset++) {
show_gpio(dev, bank_name, offset); show_gpio(dev, bank_name, offset,
&flags);
}
} }
} }
/* Add a newline between bank names */
if (!(flags & FLAG_SHOW_BANK))
flags |= FLAG_SHOW_NEWLINE;
} }
return ret; return ret;
@ -108,23 +136,33 @@ static int do_gpio(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
enum gpio_cmd sub_cmd; enum gpio_cmd sub_cmd;
ulong value; ulong value;
const char *str_cmd, *str_gpio = NULL; const char *str_cmd, *str_gpio = NULL;
#ifdef CONFIG_DM_GPIO
int ret; int ret;
#ifdef CONFIG_DM_GPIO
bool all = false;
#endif #endif
if (argc < 2) if (argc < 2)
show_usage: show_usage:
return CMD_RET_USAGE; return CMD_RET_USAGE;
str_cmd = argv[1]; str_cmd = argv[1];
if (argc > 2) argc -= 2;
str_gpio = argv[2]; argv += 2;
#ifdef CONFIG_DM_GPIO
if (argc > 0 && !strcmp(*argv, "-a")) {
all = true;
argc--;
argv++;
}
#endif
if (argc > 0)
str_gpio = *argv;
if (!strcmp(str_cmd, "status")) { if (!strcmp(str_cmd, "status")) {
/* Support deprecated gpio_status() */ /* Support deprecated gpio_status() */
#ifdef gpio_status #ifdef gpio_status
gpio_status(); gpio_status();
return 0; return 0;
#elif defined(CONFIG_DM_GPIO) #elif defined(CONFIG_DM_GPIO)
return cmd_process_error(cmdtp, do_gpio_status(str_gpio)); return cmd_process_error(cmdtp, do_gpio_status(all, str_gpio));
#else #else
goto show_usage; goto show_usage;
#endif #endif
@ -160,7 +198,8 @@ static int do_gpio(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
goto show_usage; goto show_usage;
#endif #endif
/* grab the pin before we tweak it */ /* grab the pin before we tweak it */
if (gpio_request(gpio, "cmd_gpio")) { ret = gpio_request(gpio, "cmd_gpio");
if (ret && ret != -EBUSY) {
printf("gpio: requesting pin %u failed\n", gpio); printf("gpio: requesting pin %u failed\n", gpio);
return -1; return -1;
} }
@ -181,13 +220,14 @@ static int do_gpio(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
printf("gpio: pin %s (gpio %i) value is %lu\n", printf("gpio: pin %s (gpio %i) value is %lu\n",
str_gpio, gpio, value); str_gpio, gpio, value);
gpio_free(gpio); if (ret != -EBUSY)
gpio_free(gpio);
return value; return value;
} }
U_BOOT_CMD(gpio, 3, 0, do_gpio, U_BOOT_CMD(gpio, 4, 0, do_gpio,
"query and control gpio pins", "query and control gpio pins",
"<input|set|clear|toggle> <pin>\n" "<input|set|clear|toggle> <pin>\n"
" - input/set/clear/toggle the specified pin\n" " - input/set/clear/toggle the specified pin\n"
"gpio status [<bank> | <pin>]"); "gpio status [-a] [<bank> | <pin>] - show [all/claimed] GPIOs");

15
include/asm-generic/gpio.h
View File

@ -79,11 +79,15 @@ int gpio_get_value(unsigned gpio);
*/ */
int gpio_set_value(unsigned gpio, int value); int gpio_set_value(unsigned gpio, int value);
/* State of a GPIO, as reported by get_state() */ /* State of a GPIO, as reported by get_function() */
enum { enum {
GPIOF_INPUT = 0, GPIOF_INPUT = 0,
GPIOF_OUTPUT, GPIOF_OUTPUT,
GPIOF_UNKNOWN, GPIOF_UNUSED, /* Not claimed */
GPIOF_UNKNOWN, /* Not known */
GPIOF_FUNC, /* Not used as a GPIO */
GPIOF_COUNT,
}; };
struct udevice; struct udevice;
@ -123,6 +127,13 @@ struct dm_gpio_ops {
int value); int value);
int (*get_value)(struct udevice *dev, unsigned offset); int (*get_value)(struct udevice *dev, unsigned offset);
int (*set_value)(struct udevice *dev, unsigned offset, int value); int (*set_value)(struct udevice *dev, unsigned offset, int value);
/**
* get_function() Get the GPIO function
*
* @dev: Device to check
* @offset: GPIO offset within that device
* @return current function - GPIOF_...
*/
int (*get_function)(struct udevice *dev, unsigned offset); int (*get_function)(struct udevice *dev, unsigned offset);
int (*get_state)(struct udevice *dev, unsigned offset, char *state, int (*get_state)(struct udevice *dev, unsigned offset, char *state,
int maxlen); int maxlen);