diff options
| author | Aparna Patra <a-patra@ti.com> | 2025-01-08 10:19:38 +0530 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2025-01-14 15:50:07 -0600 |
| commit | 8d05cbef73ae014cd91d620dd4b5b40056933027 (patch) | |
| tree | 725299a79a8d3d3908e93686b55d476a86e9f929 | |
| parent | a226a6422c9a8b02929c0f768dbce1c5311ccdc4 (diff) | |
arm: mach-k3: am62p: Fixup a53 max cpu frequency by speed-grade
AM62P SoC has multiple speed grades. Add function to delete
non-relevant CPU frequency nodes, based on the information
retrieved from hardware registers. Fastest grade's maximum
frequency also depends on PMIC voltage, hence to simplify
implementation use the smaller value.
Signed-off-by: Aparna Patra <a-patra@ti.com>
Reviewed-by: Bryan Brattlof <bb@ti.com>
| -rw-r--r-- | arch/arm/mach-k3/am62px/am62p5_fdt.c | 12 | ||||
| -rw-r--r-- | arch/arm/mach-k3/include/mach/am62p_hardware.h | 19 |
2 files changed, 31 insertions, 0 deletions
diff --git a/arch/arm/mach-k3/am62px/am62p5_fdt.c b/arch/arm/mach-k3/am62px/am62p5_fdt.c index 96194cebcd7..2c40fa5a594 100644 --- a/arch/arm/mach-k3/am62px/am62p5_fdt.c +++ b/arch/arm/mach-k3/am62px/am62p5_fdt.c @@ -74,12 +74,24 @@ static void fdt_fixup_thermal_zone_nodes_am62p(void *blob, int maxc) } } +static void fdt_fixup_cpu_freq_nodes_am62p(void *blob, int max_freq) +{ + if (max_freq >= 1250000000) + return; + + if (max_freq <= 1000000000) { + fdt_del_node_path(blob, "/opp-table/opp-1250000000"); + fdt_del_node_path(blob, "/opp-table/opp-1400000000"); + } +} + int ft_system_setup(void *blob, struct bd_info *bd) { fdt_fixup_cores_wdt_nodes_am62p(blob, k3_get_core_nr()); fdt_fixup_video_codec_nodes_am62p(blob, k3_has_video_codec()); fdt_fixup_canfd_nodes_am62p(blob, k3_has_canfd()); fdt_fixup_thermal_zone_nodes_am62p(blob, k3_get_max_temp()); + fdt_fixup_cpu_freq_nodes_am62p(blob, k3_get_a53_max_frequency()); fdt_fixup_reserved(blob, "tfa", CONFIG_K3_ATF_LOAD_ADDR, 0x80000); fdt_fixup_reserved(blob, "optee", CONFIG_K3_OPTEE_LOAD_ADDR, 0x1800000); diff --git a/arch/arm/mach-k3/include/mach/am62p_hardware.h b/arch/arm/mach-k3/include/mach/am62p_hardware.h index 2f1c8517e64..95af5c5c547 100644 --- a/arch/arm/mach-k3/include/mach/am62p_hardware.h +++ b/arch/arm/mach-k3/include/mach/am62p_hardware.h @@ -26,6 +26,8 @@ #define JTAG_DEV_CANFD_SHIFT 15 #define JTAG_DEV_VIDEO_CODEC_MASK BIT(14) #define JTAG_DEV_VIDEO_CODEC_SHIFT 14 +#define JTAG_DEV_SPEED_MASK GENMASK(10, 6) +#define JTAG_DEV_SPEED_SHIFT 6 #define JTAG_DEV_TEMP_MASK GENMASK(5, 3) #define JTAG_DEV_TEMP_SHIFT 3 @@ -118,6 +120,23 @@ static inline int k3_get_max_temp(void) return JTAG_DEV_TEMP_EXTENDED_VALUE; } +static inline char k3_get_speed_grade(void) +{ + u32 dev_id = readl(CTRLMMR_WKUP_JTAG_DEVICE_ID); + u32 speed_grade = (dev_id & JTAG_DEV_SPEED_MASK) >> + JTAG_DEV_SPEED_SHIFT; + + return 'A' - 1 + speed_grade; +} + +static inline int k3_get_a53_max_frequency(void) +{ + if (k3_get_speed_grade() == 'O') + return 1000000000; + else + return 1250000000; +} + #if defined(CONFIG_SYS_K3_SPL_ATF) && !defined(__ASSEMBLY__) static const u32 put_device_ids[] = {}; |