diff options
| author | Feng Kan <fkan@apm.com> | 2014-10-02 11:24:15 -0700 |
|---|---|---|
| committer | Sebastian Reichel <sre@kernel.org> | 2014-10-03 04:32:08 +0200 |
| commit | afaebbdbd48ada5ead707d6a90ce4b604e1d77d4 (patch) | |
| tree | fc11ce4144991227bac55c4c100061f109f60df2 /drivers/power | |
| parent | a7ba749e01461a3802d22157fc0e6c4ecbe0dd32 (diff) | |
| download | lwn-afaebbdbd48ada5ead707d6a90ce4b604e1d77d4.tar.gz lwn-afaebbdbd48ada5ead707d6a90ce4b604e1d77d4.zip | |
power: reset: corrections for simple syscon reboot driver
This patch is to fix some bugs in reboot driver. Which includes auto selection
of the MFD_SYSCON for the driver, use of container to locate restart handler,
correction of the count down failure timer and ordering of the header file.
Signed-off-by: Feng Kan <fkan@apm.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
[ sre: return err instead of 0 in syscon_reboot_probe() ]
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/reset/Kconfig | 3 | ||||
| -rw-r--r-- | drivers/power/reset/syscon-reboot.c | 27 |
2 files changed, 13 insertions, 17 deletions
diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index addb26afae5a..3b451e162a98 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig @@ -120,6 +120,7 @@ config POWER_RESET_KEYSTONE config POWER_RESET_SYSCON bool "Generic SYSCON regmap reset driver" - depends on POWER_RESET && MFD_SYSCON && OF + depends on POWER_RESET && OF + select MFD_SYSCON help Reboot support for generic SYSCON mapped register reset. diff --git a/drivers/power/reset/syscon-reboot.c b/drivers/power/reset/syscon-reboot.c index 948e0ee32a4d..815b901822cf 100644 --- a/drivers/power/reset/syscon-reboot.c +++ b/drivers/power/reset/syscon-reboot.c @@ -14,14 +14,15 @@ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ +#include <linux/delay.h> #include <linux/io.h> -#include <linux/of_device.h> -#include <linux/of_address.h> -#include <linux/platform_device.h> #include <linux/notifier.h> #include <linux/mfd/syscon.h> -#include <linux/regmap.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> #include <linux/reboot.h> +#include <linux/regmap.h> struct syscon_reboot_context { struct regmap *map; @@ -30,21 +31,17 @@ struct syscon_reboot_context { struct notifier_block restart_handler; }; -static struct syscon_reboot_context *syscon_reboot_ctx; - static int syscon_restart_handle(struct notifier_block *this, unsigned long mode, void *cmd) { - struct syscon_reboot_context *ctx = syscon_reboot_ctx; - unsigned long timeout; + struct syscon_reboot_context *ctx = + container_of(this, struct syscon_reboot_context, + restart_handler); /* Issue the reboot */ - if (ctx->map) - regmap_write(ctx->map, ctx->offset, ctx->mask); + regmap_write(ctx->map, ctx->offset, ctx->mask); - timeout = jiffies + HZ; - while (time_before(jiffies, timeout)) - cpu_relax(); + mdelay(1000); pr_emerg("Unable to restart system\n"); return NOTIFY_DONE; @@ -76,9 +73,7 @@ static int syscon_reboot_probe(struct platform_device *pdev) if (err) dev_err(dev, "can't register restart notifier (err=%d)\n", err); - syscon_reboot_ctx = ctx; - - return 0; + return err; } static struct of_device_id syscon_reboot_of_match[] = { |