| Message ID | 1515484746-10656-6-git-send-email-cw00.choi@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, Jan 9, 2018 at 8:59 AM, Chanwoo Choi <cw00.choi@samsung.com> wrote: > This patch adds the specific exynos_pm_data instance for Exynos5433 > in order to support the suspend-to-ram. Exynos5433 SoC need to write > the 'cpu_resume' poiter address and the specific magic number > for suspend mode. > > Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com> > Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> > --- > drivers/soc/samsung/exynos-pm.c | 38 ++++++++++++++++++++++++++++++++++++++ > 1 file changed, 38 insertions(+) > > diff --git a/drivers/soc/samsung/exynos-pm.c b/drivers/soc/samsung/exynos-pm.c > index 45d84bbe5e61..70d949ba5cab 100644 > --- a/drivers/soc/samsung/exynos-pm.c > +++ b/drivers/soc/samsung/exynos-pm.c > @@ -12,6 +12,7 @@ > #include <linux/regulator/machine.h> > #include <linux/syscore_ops.h> > #include <linux/suspend.h> > +#include <linux/psci.h> > > #include <asm/cpuidle.h> > #include <asm/io.h> > @@ -123,7 +124,44 @@ static void exynos_pm_finish(void) > #define exynos_pm_data_arm_ptr(data) NULL > #endif > > +static int exynos5433_pm_suspend(unsigned long unused) > +{ > + /* > + * Exynos5433 uses PSCI v0.1 which provides the only one > + * entry point (psci_ops.cpu_suspend) for both cpuidle and > + * suspend-to-RAM. Also, PSCI v0.1 needs the specific 'power_state' > + * parameter for the suspend mode. In order to enter suspend mode, > + * Exynos5433 calls the 'psci_ops.cpu_suspend' with '0x3010000' > + * power_state parameter. > + * > + * '0x3010000' means that both cluster and system are going to enter > + * the power-down state as following: > + * - [25:24] 0x3 : Indicate the cluster and system. > + * - [16] 0x1 : Indicate power-down state. Define them, it will be more readable (name of define given just as an example): EXYNOS5433_PCSI_SUSPEND_SYSTEM (0x3 << 24) (or even split per system and cluser and use BIT() if this is real meaning) and probably reuse existing S5P_CENTRAL_LOWPWR_CFG > + */ > + return psci_ops.cpu_suspend(0x3010000, __pa_symbol(cpu_resume)); > +} > + > +static int exynos5433_pm_suspend_enter(suspend_state_t state) > +{ > + if (!sysram_ns_base_addr) > + return -EINVAL; > + > + __raw_writel(virt_to_phys(cpu_resume), sysram_ns_base_addr + 0x8); > + __raw_writel(EXYNOS_SLEEP_MAGIC, sysram_ns_base_addr + 0xc); Document them in Documentation/arm/Samsung/Bootloader-interface.txt. Best regards, Krzysztof > + > + return cpu_suspend(0, exynos5433_pm_suspend); > +} > + > +const struct exynos_pm_data exynos5433_pm_data = { > + .enter = exynos5433_pm_suspend_enter, > +}; > + > static const struct of_device_id exynos_pm_of_device_ids[] = { > + { > + .compatible = "samsung,exynos5433-pmu", > + .data = exynos_pm_data_arm_ptr(exynos5433_pm_data), > + }, > { /*sentinel*/ }, > }; > > -- > 1.9.1 >
On 2018년 01월 09일 21:45, Krzysztof Kozlowski wrote: > On Tue, Jan 9, 2018 at 8:59 AM, Chanwoo Choi <cw00.choi@samsung.com> wrote: >> This patch adds the specific exynos_pm_data instance for Exynos5433 >> in order to support the suspend-to-ram. Exynos5433 SoC need to write >> the 'cpu_resume' poiter address and the specific magic number >> for suspend mode. >> >> Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com> >> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> >> --- >> drivers/soc/samsung/exynos-pm.c | 38 ++++++++++++++++++++++++++++++++++++++ >> 1 file changed, 38 insertions(+) >> >> diff --git a/drivers/soc/samsung/exynos-pm.c b/drivers/soc/samsung/exynos-pm.c >> index 45d84bbe5e61..70d949ba5cab 100644 >> --- a/drivers/soc/samsung/exynos-pm.c >> +++ b/drivers/soc/samsung/exynos-pm.c >> @@ -12,6 +12,7 @@ >> #include <linux/regulator/machine.h> >> #include <linux/syscore_ops.h> >> #include <linux/suspend.h> >> +#include <linux/psci.h> >> >> #include <asm/cpuidle.h> >> #include <asm/io.h> >> @@ -123,7 +124,44 @@ static void exynos_pm_finish(void) >> #define exynos_pm_data_arm_ptr(data) NULL >> #endif >> >> +static int exynos5433_pm_suspend(unsigned long unused) >> +{ >> + /* >> + * Exynos5433 uses PSCI v0.1 which provides the only one >> + * entry point (psci_ops.cpu_suspend) for both cpuidle and >> + * suspend-to-RAM. Also, PSCI v0.1 needs the specific 'power_state' >> + * parameter for the suspend mode. In order to enter suspend mode, >> + * Exynos5433 calls the 'psci_ops.cpu_suspend' with '0x3010000' >> + * power_state parameter. >> + * >> + * '0x3010000' means that both cluster and system are going to enter >> + * the power-down state as following: >> + * - [25:24] 0x3 : Indicate the cluster and system. >> + * - [16] 0x1 : Indicate power-down state. > > Define them, it will be more readable (name of define given just as an example): > > EXYNOS5433_PCSI_SUSPEND_SYSTEM (0x3 << 24) > (or even split per system and cluser and use BIT() if this is real meaning) > and probably reuse existing S5P_CENTRAL_LOWPWR_CFG OK. I'll define it as the constant. > >> + */ >> + return psci_ops.cpu_suspend(0x3010000, __pa_symbol(cpu_resume)); >> +} >> + >> +static int exynos5433_pm_suspend_enter(suspend_state_t state) >> +{ >> + if (!sysram_ns_base_addr) >> + return -EINVAL; >> + >> + __raw_writel(virt_to_phys(cpu_resume), sysram_ns_base_addr + 0x8); >> + __raw_writel(EXYNOS_SLEEP_MAGIC, sysram_ns_base_addr + 0xc); > > Document them in Documentation/arm/Samsung/Bootloader-interface.txt. OK. > > Best regards, > Krzysztof > >> + >> + return cpu_suspend(0, exynos5433_pm_suspend); >> +} >> + >> +const struct exynos_pm_data exynos5433_pm_data = { >> + .enter = exynos5433_pm_suspend_enter, >> +}; >> + >> static const struct of_device_id exynos_pm_of_device_ids[] = { >> + { >> + .compatible = "samsung,exynos5433-pmu", >> + .data = exynos_pm_data_arm_ptr(exynos5433_pm_data), >> + }, >> { /*sentinel*/ }, >> }; >> >> -- >> 1.9.1 >> > -- > To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" 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/soc/samsung/exynos-pm.c b/drivers/soc/samsung/exynos-pm.c index 45d84bbe5e61..70d949ba5cab 100644 --- a/drivers/soc/samsung/exynos-pm.c +++ b/drivers/soc/samsung/exynos-pm.c @@ -12,6 +12,7 @@ #include <linux/regulator/machine.h> #include <linux/syscore_ops.h> #include <linux/suspend.h> +#include <linux/psci.h> #include <asm/cpuidle.h> #include <asm/io.h> @@ -123,7 +124,44 @@ static void exynos_pm_finish(void) #define exynos_pm_data_arm_ptr(data) NULL #endif +static int exynos5433_pm_suspend(unsigned long unused) +{ + /* + * Exynos5433 uses PSCI v0.1 which provides the only one + * entry point (psci_ops.cpu_suspend) for both cpuidle and + * suspend-to-RAM. Also, PSCI v0.1 needs the specific 'power_state' + * parameter for the suspend mode. In order to enter suspend mode, + * Exynos5433 calls the 'psci_ops.cpu_suspend' with '0x3010000' + * power_state parameter. + * + * '0x3010000' means that both cluster and system are going to enter + * the power-down state as following: + * - [25:24] 0x3 : Indicate the cluster and system. + * - [16] 0x1 : Indicate power-down state. + */ + return psci_ops.cpu_suspend(0x3010000, __pa_symbol(cpu_resume)); +} + +static int exynos5433_pm_suspend_enter(suspend_state_t state) +{ + if (!sysram_ns_base_addr) + return -EINVAL; + + __raw_writel(virt_to_phys(cpu_resume), sysram_ns_base_addr + 0x8); + __raw_writel(EXYNOS_SLEEP_MAGIC, sysram_ns_base_addr + 0xc); + + return cpu_suspend(0, exynos5433_pm_suspend); +} + +const struct exynos_pm_data exynos5433_pm_data = { + .enter = exynos5433_pm_suspend_enter, +}; + static const struct of_device_id exynos_pm_of_device_ids[] = { + { + .compatible = "samsung,exynos5433-pmu", + .data = exynos_pm_data_arm_ptr(exynos5433_pm_data), + }, { /*sentinel*/ }, };