On 09/19/2014 05:06 AM, Pramod Gurav wrote:
This change uses replaces use of arm_pm_restart with recently introduced
reset mechanism in Linux kernel called restart_notifier.
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Cc: Josh Cartwright <joshc@xxxxxxxxxxxxxx>
Cc: Sebastian Reichel <sre@xxxxxxxxxx>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@xxxxxxxxx>
Cc: David Woodhouse <dwmw2@xxxxxxxxxxxxx>
Cc: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
Cc: linux-pm@xxxxxxxxxxxxxxx
Signed-off-by: Pramod Gurav <pramod.gurav@xxxxxxxxxxxxxxx>
---
This patch is tested on DB8074 Target and are based on patchset [1]
by Guenter Roeck.
[1]: https://patchwork.kernel.org/patch/4746721/
drivers/power/reset/msm-poweroff.c | 18 +++++++++++++++---
1 file changed, 15 insertions(+), 3 deletions(-)
diff --git a/drivers/power/reset/msm-poweroff.c b/drivers/power/reset/msm-poweroff.c
index 774f9a3..59b368c 100644
--- a/drivers/power/reset/msm-poweroff.c
+++ b/drivers/power/reset/msm-poweroff.c
@@ -24,17 +24,21 @@
#include <asm/system_misc.h>
static void __iomem *msm_ps_hold;
+static struct notifier_block restart_nb;
-static void do_msm_restart(enum reboot_mode reboot_mode, const char *cmd)
+static int do_msm_restart(struct notifier_block *nb, unsigned long action,
+ void *data)
{
writel(0, msm_ps_hold);
mdelay(10000);
+
+ return NOTIFY_DONE;
}
static void do_msm_poweroff(void)
{
/* TODO: Add poweroff capability */
- do_msm_restart(REBOOT_HARD, NULL);
+ do_msm_restart(&restart_nb, 0, NULL);
}
static int msm_restart_probe(struct platform_device *pdev)
@@ -47,8 +51,16 @@ static int msm_restart_probe(struct platform_device *pdev)
if (IS_ERR(msm_ps_hold))
return PTR_ERR(msm_ps_hold);
+ restart_nb.notifier_call = do_msm_restart;
+ restart_nb.priority = 128;
Since the structure is static, you might as well initialize it there
and save a few bytes of code.
+ if (register_restart_handler(&restart_nb)) {
+ dev_err(&pdev->dev,
+ "failed to setup restart handler.\n");
'failed to register ...' might be a bit better wording.
+ restart_nb.notifier_call = NULL;
No need to set notifier_call to NULL.
+ }
+
pm_power_off = do_msm_poweroff;
- arm_pm_restart = do_msm_restart;
+
return 0;
}
--
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