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lib: utils/reset: Register separate GPIO system reset devices

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Now that sbi_system support multiple system reset devices, we should
register separate devices for GPIO restart and GPIO poweroff because
DT describes these as separate devices with different compatible
strings.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Dong Du <Dd_nirvana@sjtu.edu.cn>
This commit is contained in:
Anup Patel
2021-10-21 11:11:34 +05:30
committed by Anup Patel
parent 78c2b19218
commit 309e8bdf85
1 changed files with 41 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

60
lib/utils/reset/fdt_reset_gpio.c
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@@ -35,20 +35,20 @@ static struct gpio_reset restart = {
.inactive_delay = 100 .inactive_delay = 100
}; };
static struct gpio_reset *gpio_get_reset_settings(u32 type) static struct gpio_reset *gpio_reset_get(bool is_restart, u32 type)
{ {
struct gpio_reset *reset; struct gpio_reset *reset = NULL;
switch (type) { switch (type) {
case SBI_SRST_RESET_TYPE_SHUTDOWN: case SBI_SRST_RESET_TYPE_SHUTDOWN:
reset = &poweroff; if (!is_restart)
reset = &poweroff;
break; break;
case SBI_SRST_RESET_TYPE_COLD_REBOOT: case SBI_SRST_RESET_TYPE_COLD_REBOOT:
case SBI_SRST_RESET_TYPE_WARM_REBOOT: case SBI_SRST_RESET_TYPE_WARM_REBOOT:
reset = &restart; if (is_restart)
reset = &restart;
break; break;
default:
reset = NULL;
} }
if (reset && !reset->pin.chip) if (reset && !reset->pin.chip)
@@ -57,15 +57,8 @@ static struct gpio_reset *gpio_get_reset_settings(u32 type)
return reset; return reset;
} }
static int gpio_system_reset_check(u32 type, u32 reason) static void gpio_reset_exec(struct gpio_reset *reset)
{ {
return !!gpio_get_reset_settings(type);
}
static void gpio_system_reset(u32 type, u32 reason)
{
struct gpio_reset *reset = gpio_get_reset_settings(type);
if (reset) { if (reset) {
/* drive it active, also inactive->active edge */ /* drive it active, also inactive->active edge */
gpio_direction_output(&reset->pin, 1); gpio_direction_output(&reset->pin, 1);
@@ -82,10 +75,36 @@ static void gpio_system_reset(u32 type, u32 reason)
sbi_hart_hang(); sbi_hart_hang();
} }
static struct sbi_system_reset_device gpio_reset = { static int gpio_system_poweroff_check(u32 type, u32 reason)
.name = "gpio-reset", {
.system_reset_check = gpio_system_reset_check, return !!gpio_reset_get(FALSE, type);
.system_reset = gpio_system_reset }
static void gpio_system_poweroff(u32 type, u32 reason)
{
gpio_reset_exec(gpio_reset_get(FALSE, type));
}
static struct sbi_system_reset_device gpio_poweroff = {
.name = "gpio-poweroff",
.system_reset_check = gpio_system_poweroff_check,
.system_reset = gpio_system_poweroff
};
static int gpio_system_restart_check(u32 type, u32 reason)
{
return !!gpio_reset_get(TRUE, type);
}
static void gpio_system_restart(u32 type, u32 reason)
{
gpio_reset_exec(gpio_reset_get(TRUE, type));
}
static struct sbi_system_reset_device gpio_restart = {
.name = "gpio-restart",
.system_reset_check = gpio_system_restart_check,
.system_reset = gpio_system_restart
}; };
static int gpio_reset_init(void *fdt, int nodeoff, static int gpio_reset_init(void *fdt, int nodeoff,
@@ -115,7 +134,10 @@ static int gpio_reset_init(void *fdt, int nodeoff,
if (len > 0) if (len > 0)
reset->inactive_delay = fdt32_to_cpu(*val); reset->inactive_delay = fdt32_to_cpu(*val);
sbi_system_reset_add_device(&gpio_reset); if (is_restart)
sbi_system_reset_add_device(&gpio_restart);
else
sbi_system_reset_add_device(&gpio_poweroff);
return 0; return 0;
} }