[PATCH v6 1/3] PSCI: Add initial support for PSCIv0.2 functions

[Anup Patel]

On Tue, Apr 22, 2014 at 11:02 PM, Ashwin Chaugule
<ashwin.chaugule at linaro.org> wrote:
> On 21 April 2014 02:23, Anup Patel <anup.patel at linaro.org> wrote:
>> Hi Ashwin,
>>
>> Please include system reboot & shutdown implementation
>> in this patch using PSCI v0.2 SYSTEM_OFF and
>> SYSTEM_RESET functions.
>
> hm, I had thought these relied on having the (optional) MIGRATE
> function. But thats not the case.
>
> So, how about this..
>
> ---------------------8<---------------------
>
> diff --git a/arch/arm/kernel/psci.c b/arch/arm/kernel/psci.c
> index ead8cdb..5a54f2f 100644
> --- a/arch/arm/kernel/psci.c
> +++ b/arch/arm/kernel/psci.c
> @@ -17,6 +17,8 @@
>
>  #include <linux/init.h>
>  #include <linux/of.h>
> +#include <linux/reboot.h>
> +#include <linux/pm.h>
>  #include <uapi/linux/psci.h>
>
>  #include <asm/compiler.h>
> @@ -24,6 +26,7 @@
>  #include <asm/opcodes-sec.h>
>  #include <asm/opcodes-virt.h>
>  #include <asm/psci.h>
> +#include <asm/system_misc.h>
>
>  struct psci_operations psci_ops;
>
> @@ -196,6 +199,16 @@ static int get_set_conduit_method(struct device_node *np)
>   return 0;
>  }
>
> +static void psci_sys_reset(enum reboot_mode reboot_mode, const char *cmd)
> +{
> + invoke_psci_fn(PSCI_0_2_FN_SYSTEM_RESET, 0, 0, 0);
> +}
> +
> +static void psci_sys_off(void)
> +{
> + invoke_psci_fn(PSCI_0_2_FN_SYSTEM_OFF, 0, 0, 0);
> +}
> +
>  /*
>   * PSCI Function IDs for v0.2+ are well defined so use
>   * standard values.
> @@ -249,6 +262,10 @@ static int psci_0_2_init(struct device_node *np)
>   PSCI_0_2_FN_MIGRATE_INFO_TYPE;
>   psci_ops.migrate_info_type = psci_migrate_info_type;
>
> + arm_pm_restart = psci_sys_reset;
> +
> + pm_power_off = psci_sys_off;
> +

Yes, I think this should work.

Thanks,
Anup

>  out_put_node:
>   of_node_put(np);
>   return err;
> diff --git a/arch/arm64/kernel/psci.c b/arch/arm64/kernel/psci.c
> index 63a7685..583b7c3 100644
> --- a/arch/arm64/kernel/psci.c
> +++ b/arch/arm64/kernel/psci.c
> @@ -18,6 +18,8 @@
>  #include <linux/init.h>
>  #include <linux/of.h>
>  #include <linux/smp.h>
> +#include <linux/reboot.h>
> +#include <linux/pm.h>
>  #include <uapi/linux/psci.h>
>
>  #include <asm/compiler.h>
> @@ -25,6 +27,7 @@
>  #include <asm/errno.h>
>  #include <asm/psci.h>
>  #include <asm/smp_plat.h>
> +#include <asm/system_misc.h>
>
>  #define PSCI_POWER_STATE_TYPE_STANDBY 0
>  #define PSCI_POWER_STATE_TYPE_POWER_DOWN 1
> @@ -217,6 +220,16 @@ static int get_set_conduit_method(struct device_node *np)
>   return 0;
>  }
>
> +static void psci_sys_reset(enum reboot_mode reboot_mode, const char *cmd)
> +{
> + invoke_psci_fn(PSCI_0_2_FN_SYSTEM_RESET, 0, 0, 0);
> +}
> +
> +static void psci_sys_off(void)
> +{
> + invoke_psci_fn(PSCI_0_2_FN_SYSTEM_OFF, 0, 0, 0);
> +}
> +
>  /*
>   * PSCI Function IDs for v0.2+ are well defined so use
>   * standard values.
> @@ -270,6 +283,10 @@ static int psci_0_2_init(struct device_node *np)
>   PSCI_0_2_FN_MIGRATE_INFO_TYPE;
>   psci_ops.migrate_info_type = psci_migrate_info_type;
>
> + arm_pm_restart = psci_sys_reset;
> +
> + pm_power_off = psci_sys_off;
> +
>  out_put_node:
>   of_node_put(np);
>   return err;
>
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