[U-Boot] [PATCH V3 3/9] arm: exynos: Add get_lcd_clk and set_lcd_clk callbacks for Exynos5420

[Minkyu Kang]

Dear Ajay Kumar,


On 4 July 2014 22:19, Ajay Kumar <ajaykumar.rs at samsung.com> wrote:

> Add get_lcd_clk and set_lcd_clk callbacks for Exynos5420 needed by
> exynos video driver.
> Also, configure ACLK_400_DISP1 as the parent for
> MUX_ACLK_400_DISP1_SUB_SEL.
>
> Signed-off-by: Ajay Kumar <ajaykumar.rs at samsung.com>
> Acked-by: Simon Glass <sjg at chromium.org>
> Tested-by: Simon Glass <sjg at chromium.org>
> ---
>  arch/arm/cpu/armv7/exynos/clock.c         |   83
> +++++++++++++++++++++++++++--
>  arch/arm/cpu/armv7/exynos/exynos5_setup.h |    2 +-
>  arch/arm/include/asm/arch-exynos/clk.h    |    1 +
>  3 files changed, 80 insertions(+), 6 deletions(-)
>
> diff --git a/arch/arm/cpu/armv7/exynos/clock.c
> b/arch/arm/cpu/armv7/exynos/clock.c
> index 400d134..c8be39b 100644
> --- a/arch/arm/cpu/armv7/exynos/clock.c
> +++ b/arch/arm/cpu/armv7/exynos/clock.c
> @@ -82,7 +82,8 @@ static int exynos_get_pll_clk(int pllreg, unsigned int
> r, unsigned int k)
>          * VPLL_CON: MIDV [24:16]
>          * BPLL_CON: MIDV [25:16]: Exynos5
>          */
> -       if (pllreg == APLL || pllreg == MPLL || pllreg == BPLL)
> +       if (pllreg == APLL || pllreg == MPLL || pllreg == BPLL ||
> +           pllreg == SPLL)
>                 mask = 0x3ff;
>         else
>                 mask = 0x1ff;
> @@ -391,6 +392,9 @@ static unsigned long exynos5420_get_pll_clk(int pllreg)
>                 r = readl(&clk->rpll_con0);
>                 k = readl(&clk->rpll_con1);
>                 break;
> +       case SPLL:
> +               r = readl(&clk->spll_con0);
> +               break;
>         default:
>                 printf("Unsupported PLL (%d)\n", pllreg);
>                 return 0;
> @@ -1027,6 +1031,40 @@ static unsigned long exynos5_get_lcd_clk(void)
>         return pclk;
>  }
>
> +static unsigned long exynos5420_get_lcd_clk(void)
> +{
> +       struct exynos5420_clock *clk =
> +               (struct exynos5420_clock *)samsung_get_base_clock();
> +       unsigned long pclk, sclk;
> +       unsigned int sel;
> +       unsigned int ratio;
> +
> +       /*
> +        * CLK_SRC_DISP10
> +        * FIMD1_SEL [4]
> +        * 0: SCLK_RPLL
> +        * 1: SCLK_SPLL
> +        */
> +       sel = readl(&clk->src_disp10);
> +       sel &= (1 << 4);
> +
> +       if (sel)
> +               sclk = get_pll_clk(SPLL);
> +       else
> +               sclk = get_pll_clk(RPLL);
> +
> +       /*
> +        * CLK_DIV_DISP10
> +        * FIMD1_RATIO [3:0]
> +        */
> +       ratio = readl(&clk->div_disp10);
> +       ratio = ratio & 0xf;
> +
> +       pclk = sclk / (ratio + 1);
> +
> +       return pclk;
> +}
> +
>  void exynos4_set_lcd_clk(void)
>  {
>         struct exynos4_clock *clk =
> @@ -1131,6 +1169,33 @@ void exynos5_set_lcd_clk(void)
>         clrsetbits_le32(&clk->div_disp1_0, 0xf, 0x0);
>  }
>
> +void exynos5420_set_lcd_clk(void)
> +{
> +       struct exynos5420_clock *clk =
> +               (struct exynos5420_clock *)samsung_get_base_clock();
> +       unsigned int cfg;
> +
> +       /*
> +        * CLK_SRC_DISP10
> +        * FIMD1_SEL [4]
> +        * 0: SCLK_RPLL
> +        * 1: SCLK_SPLL
> +        */
> +       cfg = readl(&clk->src_disp10);
> +       cfg &= ~(0x1 << 4);
> +       cfg |= (0 << 4);
> +       writel(cfg, &clk->src_disp10);
> +
> +       /*
> +        * CLK_DIV_DISP10
> +        * FIMD1_RATIO          [3:0]
> +        */
> +       cfg = readl(&clk->div_disp10);
> +       cfg &= ~(0xf << 0);
> +       cfg |= (0 << 0);
> +       writel(cfg, &clk->div_disp10);
> +}
> +
>  void exynos4_set_mipi_clk(void)
>  {
>         struct exynos4_clock *clk =
> @@ -1602,16 +1667,24 @@ unsigned long get_lcd_clk(void)
>  {
>         if (cpu_is_exynos4())
>                 return exynos4_get_lcd_clk();
> -       else
> -               return exynos5_get_lcd_clk();
> +       else {
> +               if (proid_is_exynos5420())
> +                       return exynos5420_get_lcd_clk();
> +               else
> +                       return exynos5_get_lcd_clk();
> +       }
>  }
>
>  void set_lcd_clk(void)
>  {
>         if (cpu_is_exynos4())
>                 exynos4_set_lcd_clk();
> -       else
> -               exynos5_set_lcd_clk();
> +       else {
> +               if (proid_is_exynos5250())
> +                       exynos5_set_lcd_clk();
> +               if (proid_is_exynos5420())
>

else if


> +                       exynos5420_set_lcd_clk();
> +       }
>  }
>
>
Thanks,
Minkyu Kang

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