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| author | Ben Gardiner <bengardiner@nanometrics.ca> | 2012-01-16 07:43:15 +0000 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2012-02-12 10:11:22 +0100 |
| commit | d652a344a009854b72d7df97c11d2582b9e11c9a (patch) | |
| tree | 41263d71b1480d01b453bde62b749650909c3a6d | |
| parent | bd29cb05f2bd655a15ba32d96a0b4028b83be320 (diff) | |
| download | u-boot-d652a344a009854b72d7df97c11d2582b9e11c9a.tar.gz u-boot-d652a344a009854b72d7df97c11d2582b9e11c9a.tar.xz u-boot-d652a344a009854b72d7df97c11d2582b9e11c9a.zip | |
arm, davinci: add PLL0 prediv to da850 lowlevel setup
The OMAP-L138 has a pre-divider available on PLL0.
Add support to da850_lowlevel.c for configuring PLL0's pre-divider. This is
to achieve certain OPP's -- e.g. the 372MHz OPP used also by Linux.
Signed-off-by: Ben Gardiner <bengardiner@nanometrics.ca>
Cc: Christian Riesch <christian.riesch@omicron.at>
CC: Heiko Schocher <hs@denx.de>
Cc: Sandeep Paulraj <s-paulraj@ti.com>
Cc: Tom Rini <tom.rini@gmail.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Acked-by: Heiko Schocher <hs@denx.de>
Acked-by: Christian Riesch <christian.riesch@omicron.at>
| -rw-r--r-- | arch/arm/cpu/arm926ejs/davinci/da850_lowlevel.c | 7 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-davinci/pll_defs.h | 3 |
2 files changed, 9 insertions, 1 deletions
diff --git a/arch/arm/cpu/arm926ejs/davinci/da850_lowlevel.c b/arch/arm/cpu/arm926ejs/davinci/da850_lowlevel.c index a532f8ab60..eec06bc54d 100644 --- a/arch/arm/cpu/arm926ejs/davinci/da850_lowlevel.c +++ b/arch/arm/cpu/arm926ejs/davinci/da850_lowlevel.c @@ -85,6 +85,13 @@ int da850_pll_init(struct davinci_pllc_regs *reg, unsigned long pllmult) /* Enable the PLL from Disable Mode PLLDIS bit to 0 */ clrbits_le32(®->pllctl, PLLCTL_PLLDIS); +#if defined(CONFIG_SYS_DA850_PLL0_PREDIV) + /* program the prediv */ + if (reg == davinci_pllc0_regs && CONFIG_SYS_DA850_PLL0_PREDIV) + writel((PLL_DIVEN | CONFIG_SYS_DA850_PLL0_PREDIV), + ®->prediv); +#endif + /* Program the required multiplier value in PLLM */ writel(pllmult, ®->pllm); diff --git a/arch/arm/include/asm/arch-davinci/pll_defs.h b/arch/arm/include/asm/arch-davinci/pll_defs.h index f1396e3194..1c8d83fb5b 100644 --- a/arch/arm/include/asm/arch-davinci/pll_defs.h +++ b/arch/arm/include/asm/arch-davinci/pll_defs.h @@ -68,7 +68,8 @@ struct dv_pll_regs { #define PLLCTL_RES_9 (1 << 8) #define PLLCTL_EXTCLKSRC (1 << 9) -#define PLL_POSTDEN (1 << 15) +#define PLL_DIVEN (1 << 15) +#define PLL_POSTDEN PLL_DIVEN #define PLL_SCSCFG3_DIV45PENA (1 << 2) #define PLL_SCSCFG3_EMA_CLKSRC (1 << 1) |