diff options
| author | Lokesh Vutla <lokeshvutla@ti.com> | 2013-02-12 21:29:05 (GMT) |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2013-03-11 15:06:11 (GMT) |
| commit | ea8eff1fe080bef7c5cdfea734d8ac4cdd957c4c (patch) | |
| tree | cd8c94874ac1a497b86528f009434e7dd80a206f /arch/arm/cpu/armv7/omap-common | |
| parent | d4e4129c31cf571824a1b34aa0b9210c876be718 (diff) | |
| download | u-boot-ea8eff1fe080bef7c5cdfea734d8ac4cdd957c4c.tar.xz | |
arm: dra7xx: clock: Add the dplls data
A new DPLL DDR is added in DRA7XX socs. Now clocks to
EMIF CD is from DPLL DDR. So DPLL DDR should be locked
before initializing RAM.
Also adding other dpll data which are different from OMAP5 ES2.0.
SYS_CLK running at 20MHz is introduced in DRA7xx socs.
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: R Sricharan <r.sricharan@ti.com>
Reviewed-by: Tom Rini <trini@ti.com>
Diffstat (limited to 'arch/arm/cpu/armv7/omap-common')
| -rw-r--r-- | arch/arm/cpu/armv7/omap-common/clocks-common.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/arch/arm/cpu/armv7/omap-common/clocks-common.c b/arch/arm/cpu/armv7/omap-common/clocks-common.c index 818a963..9ed1899 100644 --- a/arch/arm/cpu/armv7/omap-common/clocks-common.c +++ b/arch/arm/cpu/armv7/omap-common/clocks-common.c @@ -55,11 +55,12 @@ const u32 sys_clk_array[8] = { 26000000, /* 26 MHz */ 27000000, /* 27 MHz */ 38400000, /* 38.4 MHz */ + 20000000, /* 20 MHz */ }; static inline u32 __get_sys_clk_index(void) { - u32 ind; + s8 ind; /* * For ES1 the ROM code calibration of sys clock is not reliable * due to hw issue. So, use hard-coded value. If this value is not @@ -73,6 +74,13 @@ static inline u32 __get_sys_clk_index(void) /* SYS_CLKSEL - 1 to match the dpll param array indices */ ind = (readl((*prcm)->cm_sys_clksel) & CM_SYS_CLKSEL_SYS_CLKSEL_MASK) - 1; + /* + * SYS_CLKSEL value for 20MHz is 0. This is introduced newly + * in DRA7XX socs. SYS_CLKSEL -1 will be greater than + * NUM_SYS_CLK. So considering the last 3 bits as the index + * for the dpll param array. + */ + ind &= CM_SYS_CLKSEL_SYS_CLKSEL_MASK; } return ind; } @@ -201,12 +209,25 @@ const struct dpll_params *get_abe_dpll_params(struct dplls const *dpll_data) #endif } +static const struct dpll_params *get_ddr_dpll_params + (struct dplls const *dpll_data) +{ + u32 sysclk_ind = get_sys_clk_index(); + + if (!dpll_data->ddr) + return NULL; + return &dpll_data->ddr[sysclk_ind]; +} + static void do_setup_dpll(u32 const base, const struct dpll_params *params, u8 lock, char *dpll) { u32 temp, M, N; struct dpll_regs *const dpll_regs = (struct dpll_regs *)base; + if (!params) + return; + temp = readl(&dpll_regs->cm_clksel_dpll); if (check_for_lock(base)) { @@ -397,6 +418,9 @@ static void setup_dplls(void) #ifdef CONFIG_USB_EHCI_OMAP setup_usb_dpll(); #endif + params = get_ddr_dpll_params(*dplls_data); + do_setup_dpll((*prcm)->cm_clkmode_dpll_ddrphy, + params, DPLL_LOCK, "ddr"); } #ifdef CONFIG_SYS_CLOCKS_ENABLE_ALL |