| Message ID | 1411128415-20381-1-git-send-email-pramod.gurav@smartplayin.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
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@roeck-us.net> > Cc: Josh Cartwright <joshc@codeaurora.org> > Cc: Sebastian Reichel <sre@kernel.org> > Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> > Cc: David Woodhouse <dwmw2@infradead.org> > Cc: Stephen Boyd <sboyd@codeaurora.org> > Cc: linux-pm@vger.kernel.org > > Signed-off-by: Pramod Gurav <pramod.gurav@smartplayin.com> > > --- > > 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; > } > > -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Guenter, Thanks for you. On 19-09-2014 07:23 PM, Guenter Roeck wrote: > 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@roeck-us.net> >> Cc: Josh Cartwright <joshc@codeaurora.org> >> Cc: Sebastian Reichel <sre@kernel.org> >> Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> >> Cc: David Woodhouse <dwmw2@infradead.org> >> Cc: Stephen Boyd <sboyd@codeaurora.org> >> Cc: linux-pm@vger.kernel.org >> >> Signed-off-by: Pramod Gurav <pramod.gurav@smartplayin.com> >> >> --- >> >> 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. Will address the comments and send v2. > >> + } >> + >> pm_power_off = do_msm_poweroff; >> - arm_pm_restart = do_msm_restart; >> + >> return 0; >> } >> >> > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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; + if (register_restart_handler(&restart_nb)) { + dev_err(&pdev->dev, + "failed to setup restart handler.\n"); + restart_nb.notifier_call = NULL; + } + pm_power_off = do_msm_poweroff; - arm_pm_restart = do_msm_restart; + return 0; }
This change uses replaces use of arm_pm_restart with recently introduced reset mechanism in Linux kernel called restart_notifier. Cc: Guenter Roeck <linux@roeck-us.net> Cc: Josh Cartwright <joshc@codeaurora.org> Cc: Sebastian Reichel <sre@kernel.org> Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: linux-pm@vger.kernel.org Signed-off-by: Pramod Gurav <pramod.gurav@smartplayin.com> --- 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(-)