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| author | Alexey Romanov <avromanov@sberdevices.ru> | 2023-05-31 12:31:54 +0300 |
|---|---|---|
| committer | Neil Armstrong <neil.armstrong@linaro.org> | 2023-06-28 10:05:34 +0200 |
| commit | eb0a01e603ea40d36d14fac2b6381923b4c42bf2 (patch) | |
| tree | 44bf6847574d6d822af0dd11c2cca1778b6251c7 /arch/arm | |
| parent | 1444acbd030edc515e4b521d0eb517de7562baa7 (diff) | |
| download | u-boot-eb0a01e603ea40d36d14fac2b6381923b4c42bf2.zip u-boot-eb0a01e603ea40d36d14fac2b6381923b4c42bf2.tar.gz u-boot-eb0a01e603ea40d36d14fac2b6381923b4c42bf2.tar.bz2 | |
arch/arm: meson: sm: introduce power domain functions
This commit adds functions to manage secure power domain for
Amlogic SoC's using smc functionality.
Signed-off-by: Alexey Romanov <avromanov@sberdevices.ru>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230531093156.29240-2-avromanov@sberdevices.ru
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/include/asm/arch-meson/sm.h | 30 | ||||
| -rw-r--r-- | arch/arm/mach-meson/sm.c | 14 |
2 files changed, 44 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-meson/sm.h b/arch/arm/include/asm/arch-meson/sm.h index 53b7517..4b1d564 100644 --- a/arch/arm/include/asm/arch-meson/sm.h +++ b/arch/arm/include/asm/arch-meson/sm.h @@ -58,4 +58,34 @@ enum { */ int meson_sm_get_reboot_reason(void); +#define PWRDM_OFF 0 +#define PWRDM_ON 1 + +/** + * meson_sm_pwrdm_set - do command at specified power domain. + * + * @index: power domain index. + * @cmd: command index. + * @return: zero on success or error code on failure. + */ +int meson_sm_pwrdm_set(size_t index, int cmd); + +/** + * meson_sm_pwrdm_off - disable specified power domain. + * + * @index: power domain index. + * @return: zero on success or error code on failure. + */ +#define meson_sm_pwrdm_off(index) \ + meson_sm_pwrdm_set(index, PWRDM_OFF) + +/** + * meson_sm_pwrdm_on - enable specified power domain. + * + * @index: power domain index. + * @return: zero on success or error code on failure. + */ +#define meson_sm_pwrdm_on(index) \ + meson_sm_pwrdm_set(index, PWRDM_ON) + #endif /* __MESON_SM_H__ */ diff --git a/arch/arm/mach-meson/sm.c b/arch/arm/mach-meson/sm.c index f2ca7e7..d600c64d 100644 --- a/arch/arm/mach-meson/sm.c +++ b/arch/arm/mach-meson/sm.c @@ -24,6 +24,7 @@ #define FN_EFUSE_READ 0x82000030 #define FN_EFUSE_WRITE 0x82000031 #define FN_CHIP_ID 0x82000044 +#define FN_PWRDM_SET 0x82000093 static void *shmem_input; static void *shmem_output; @@ -137,3 +138,16 @@ int meson_sm_get_reboot_reason(void) /* The SMC call is not used, we directly use AO_SEC_SD_CFG15 */ return FIELD_GET(REBOOT_REASON_MASK, reason); } + +int meson_sm_pwrdm_set(size_t index, int cmd) +{ + struct pt_regs regs; + + regs.regs[0] = FN_PWRDM_SET; + regs.regs[1] = index; + regs.regs[2] = cmd; + + smc_call(®s); + + return regs.regs[0]; +} |