[U-Boot] [PATCH 2/6] arm: exynos: Add RPLL for Exynos5420

[Ajay kumar]

ping.


On Mon, Sep 30, 2013 at 4:50 PM, Ajay Kumar <ajaykumar.rs at samsung.com>wrote:

> RPLL is needed to drive the LCD panel on Exynos5420 based boards.
>
> Signed-off-by: Ajay Kumar <ajaykumar.rs at samsung.com>
> ---
>  arch/arm/cpu/armv7/exynos/clock_init.h         |  3 +++
>  arch/arm/cpu/armv7/exynos/clock_init_exynos5.c | 13 +++++++++++++
>  2 files changed, 16 insertions(+)
>
> diff --git a/arch/arm/cpu/armv7/exynos/clock_init.h
> b/arch/arm/cpu/armv7/exynos/clock_init.h
> index a875d0b..fce502f 100644
> --- a/arch/arm/cpu/armv7/exynos/clock_init.h
> +++ b/arch/arm/cpu/armv7/exynos/clock_init.h
> @@ -75,6 +75,9 @@ struct mem_timings {
>         unsigned spll_mdiv;
>         unsigned spll_pdiv;
>         unsigned spll_sdiv;
> +       unsigned rpll_mdiv;
> +       unsigned rpll_pdiv;
> +       unsigned rpll_sdiv;
>         unsigned pclk_cdrex_ratio;
>         unsigned direct_cmd_msr[MEM_TIMINGS_MSR_COUNT];
>
> diff --git a/arch/arm/cpu/armv7/exynos/clock_init_exynos5.c
> b/arch/arm/cpu/armv7/exynos/clock_init_exynos5.c
> index e7f1496..c91c4a1 100644
> --- a/arch/arm/cpu/armv7/exynos/clock_init_exynos5.c
> +++ b/arch/arm/cpu/armv7/exynos/clock_init_exynos5.c
> @@ -179,6 +179,10 @@ struct mem_timings mem_timings[] = {
>                 .spll_mdiv = 0xc8,
>                 .spll_pdiv = 0x3,
>                 .spll_sdiv = 0x2,
> +               /* RPLL @266MHz */
> +               .rpll_mdiv = 0x10A,
> +               .rpll_pdiv = 0x3,
> +               .rpll_sdiv = 0x3,
>
>                 .direct_cmd_msr = {
>                         0x00020018, 0x00030000, 0x00010046, 0x00000d70,
> @@ -800,6 +804,7 @@ static void exynos5420_system_clock_init(void)
>         writel(mem->ipll_pdiv * PLL_LOCK_FACTOR, &clk->ipll_lock);
>         writel(mem->spll_pdiv * PLL_LOCK_FACTOR, &clk->spll_lock);
>         writel(mem->kpll_pdiv * PLL_LOCK_FACTOR, &clk->kpll_lock);
> +       writel(mem->rpll_pdiv * PLL_X_LOCK_FACTOR, &clk->rpll_lock);
>
>         setbits_le32(&clk->src_cpu, MUX_HPM_SEL_MASK);
>
> @@ -898,6 +903,14 @@ static void exynos5420_system_clock_init(void)
>         while ((readl(&clk->spll_con0) & PLL_LOCKED) == 0)
>                 ;
>
> +       /* Set RPLL */
> +       writel(RPLL_CON2_VAL, &clk->rpll_con2);
> +       writel(RPLL_CON1_VAL, &clk->rpll_con1);
> +       val = set_pll(mem->rpll_mdiv, mem->rpll_pdiv, mem->rpll_sdiv);
> +       writel(val, &clk->rpll_con0);
> +       while ((readl(&clk->rpll_con0) & PLL_LOCKED) == 0)
> +               ;
> +
>         writel(CLK_DIV_CDREX0_VAL, &clk->div_cdrex0);
>         writel(CLK_DIV_CDREX1_VAL, &clk->div_cdrex1);
>
> --
> 1.7.12.4
>
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