diff options
| author | Lokesh Vutla <lokeshvutla@ti.com> | 2013-12-10 15:02:20 +0530 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2013-12-18 21:14:01 -0500 |
| commit | cf04d0326bd1e24909cfe644c0c8676440a915b1 (patch) | |
| tree | b0363c4e98bc6eb2bfe4c5bf5c6ef76f40ccaf36 /arch/arm/cpu | |
| parent | 4892495e368da9462cd5c1c0d6498fe95b45192e (diff) | |
ARM: AM43xx: clocks: Update DPLL details
Updating the Multiplier and Dividers value for all DPLLs.
Safest OPP is read from DEV ATTRIBUTE register. Accoring to the value
returned the MPU DPLL is locked.
At different OPPs follwoing are the MPU locked frequencies.
OPP50 300MHz
OPP100 600MHz
OPP120 720MHz
OPPTB 800MHz
OPPNT 1000MHz
According to the latest DM following is the OPP table dependencies:
VDD_CORE VDD_MPU
OPP50 OPP50
OPP50 OPP100
OPP100 OPP50
OPP100 OPP100
OPP100 OPP120
So at different OPPs of MPU it is safest to lock CORE at OPP_NOM.
Following are the DPLL locking frequencies at OPP NOM:
Core locks at 1000MHz
Per locks at 960MHz
LPDDR2 locks at 266MHz
DDR3 locks at 400MHz
Touching AM33xx files also to get DPLL values specific to board but no
functionality difference.
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Diffstat (limited to 'arch/arm/cpu')
| -rw-r--r-- | arch/arm/cpu/armv7/am33xx/clock.c | 12 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/am33xx/clock_am33xx.c | 15 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/am33xx/clock_am43xx.c | 8 |
3 files changed, 25 insertions, 10 deletions
diff --git a/arch/arm/cpu/armv7/am33xx/clock.c b/arch/arm/cpu/armv7/am33xx/clock.c index 8e5f3c6715..0672798fe0 100644 --- a/arch/arm/cpu/armv7/am33xx/clock.c +++ b/arch/arm/cpu/armv7/am33xx/clock.c @@ -101,9 +101,15 @@ void do_setup_dpll(const struct dpll_regs *dpll_regs, static void setup_dplls(void) { const struct dpll_params *params; - do_setup_dpll(&dpll_core_regs, &dpll_core); - do_setup_dpll(&dpll_mpu_regs, &dpll_mpu); - do_setup_dpll(&dpll_per_regs, &dpll_per); + + params = get_dpll_core_params(); + do_setup_dpll(&dpll_core_regs, params); + + params = get_dpll_mpu_params(); + do_setup_dpll(&dpll_mpu_regs, params); + + params = get_dpll_per_params(); + do_setup_dpll(&dpll_per_regs, params); writel(0x300, &cmwkup->clkdcoldodpllper); params = get_dpll_ddr_params(); diff --git a/arch/arm/cpu/armv7/am33xx/clock_am33xx.c b/arch/arm/cpu/armv7/am33xx/clock_am33xx.c index fabe2595a3..92142c8934 100644 --- a/arch/arm/cpu/armv7/am33xx/clock_am33xx.c +++ b/arch/arm/cpu/armv7/am33xx/clock_am33xx.c @@ -62,6 +62,21 @@ const struct dpll_params dpll_core = { const struct dpll_params dpll_per = { 960, OSC-1, 5, -1, -1, -1, -1}; +const struct dpll_params *get_dpll_mpu_params(void) +{ + return &dpll_mpu; +} + +const struct dpll_params *get_dpll_core_params(void) +{ + return &dpll_core; +} + +const struct dpll_params *get_dpll_per_params(void) +{ + return &dpll_per; +} + void setup_clocks_for_console(void) { clrsetbits_le32(&cmwkup->wkclkstctrl, CD_CLKCTRL_CLKTRCTRL_MASK, diff --git a/arch/arm/cpu/armv7/am33xx/clock_am43xx.c b/arch/arm/cpu/armv7/am33xx/clock_am43xx.c index 22963b7f85..97c00b4925 100644 --- a/arch/arm/cpu/armv7/am33xx/clock_am43xx.c +++ b/arch/arm/cpu/armv7/am33xx/clock_am43xx.c @@ -48,15 +48,9 @@ const struct dpll_regs dpll_ddr_regs = { .cm_idlest_dpll = CM_WKUP + 0x5A4, .cm_clksel_dpll = CM_WKUP + 0x5AC, .cm_div_m2_dpll = CM_WKUP + 0x5B0, + .cm_div_m4_dpll = CM_WKUP + 0x5B8, }; -const struct dpll_params dpll_mpu = { - -1, -1, -1, -1, -1, -1, -1}; -const struct dpll_params dpll_core = { - -1, -1, -1, -1, -1, -1, -1}; -const struct dpll_params dpll_per = { - -1, -1, -1, -1, -1, -1, -1}; - void setup_clocks_for_console(void) { /* Do not add any spl_debug prints in this function */ |