diff options
Diffstat (limited to 'arch/arm/cpu/armv7/sunxi/dram.c')
| -rw-r--r-- | arch/arm/cpu/armv7/sunxi/dram.c | 36 |
1 files changed, 18 insertions, 18 deletions
diff --git a/arch/arm/cpu/armv7/sunxi/dram.c b/arch/arm/cpu/armv7/sunxi/dram.c index 584f7420d7..3cf3cbf19a 100644 --- a/arch/arm/cpu/armv7/sunxi/dram.c +++ b/arch/arm/cpu/armv7/sunxi/dram.c @@ -252,15 +252,9 @@ static void mctl_setup_dram_clock(u32 clk, u32 mbus_clk) { u32 reg_val; struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; - - /* PLL5P and PLL6 are the potential clock sources for MBUS */ - u32 pll6x_div, pll5p_div; - u32 pll6x_clk = clock_get_pll6() / 1000000; - u32 pll5p_clk = clk / 24 * 48; + u32 pll5p_clk, pll6x_clk; + u32 pll5p_div, pll6x_div; u32 pll5p_rate, pll6x_rate; -#ifdef CONFIG_SUN7I - pll6x_clk *= 2; /* sun7i uses PLL6*2, sun5i uses just PLL6 */ -#endif /* setup DRAM PLL */ reg_val = readl(&ccm->pll5_cfg); @@ -268,33 +262,32 @@ static void mctl_setup_dram_clock(u32 clk, u32 mbus_clk) reg_val &= ~CCM_PLL5_CTRL_K_MASK; /* set K to 0 (x1) */ reg_val &= ~CCM_PLL5_CTRL_N_MASK; /* set N to 0 (x0) */ reg_val &= ~CCM_PLL5_CTRL_P_MASK; /* set P to 0 (x1) */ +#ifdef CONFIG_OLD_SUNXI_KERNEL_COMPAT + /* Old kernels are hardcoded to P=1 (divide by 2) */ + reg_val |= CCM_PLL5_CTRL_P(1); +#endif if (clk >= 540 && clk < 552) { - /* dram = 540MHz, pll5p = 1080MHz */ - pll5p_clk = 1080; + /* dram = 540MHz */ reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(2)); reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(3)); reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(15)); } else if (clk >= 512 && clk < 528) { - /* dram = 512MHz, pll5p = 1536MHz */ - pll5p_clk = 1536; + /* dram = 512MHz */ reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(3)); reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(4)); reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(16)); } else if (clk >= 496 && clk < 504) { - /* dram = 496MHz, pll5p = 1488MHz */ - pll5p_clk = 1488; + /* dram = 496MHz */ reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(3)); reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(2)); reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(31)); } else if (clk >= 468 && clk < 480) { - /* dram = 468MHz, pll5p = 936MHz */ - pll5p_clk = 936; + /* dram = 468MHz */ reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(2)); reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(3)); reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(13)); } else if (clk >= 396 && clk < 408) { - /* dram = 396MHz, pll5p = 792MHz */ - pll5p_clk = 792; + /* dram = 396MHz */ reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(2)); reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(3)); reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(11)); @@ -322,6 +315,13 @@ static void mctl_setup_dram_clock(u32 clk, u32 mbus_clk) /* setup MBUS clock */ if (!mbus_clk) mbus_clk = 300; + + /* PLL5P and PLL6 are the potential clock sources for MBUS */ + pll6x_clk = clock_get_pll6() / 1000000; +#ifdef CONFIG_SUN7I + pll6x_clk *= 2; /* sun7i uses PLL6*2, sun5i uses just PLL6 */ +#endif + pll5p_clk = clock_get_pll5p() / 1000000; pll6x_div = DIV_ROUND_UP(pll6x_clk, mbus_clk); pll5p_div = DIV_ROUND_UP(pll5p_clk, mbus_clk); pll6x_rate = pll6x_clk / pll6x_div; |