sunxi: Add CONFIG_OLD_SUNXI_KERNEL_COMPAT Kconfig option

[karo-tx-uboot.git] / arch / arm / cpu / armv7 / sunxi / dram.c

diff --git a/arch/arm/cpu/armv7/sunxi/dram.c b/arch/arm/cpu/armv7/sunxi/dram.c
index 0cbcf5767c369f631834fbb4b2267869ecfd6672..3cf3cbf19adb25fce553a4f88a8d35ca6909999a 100644 (file)
--- a/arch/arm/cpu/armv7/sunxi/dram.c
+++ b/arch/arm/cpu/armv7/sunxi/dram.c
@@ -262,6 +262,10 @@ 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 */
                reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(2));