[U-Boot] [PATCH] sunxi: Fix sun5i mbus speed when booting old kernels

[Hans de Goede]

Older linux-sunxi-3.4 kernels override our PLL6 setting with 300 MHz,
halving the mbus frequency, so set it to 300 MHz ourselves and base the
mbus divider on that.

Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
 arch/arm/include/asm/arch-sunxi/clock_sun4i.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm/include/asm/arch-sunxi/clock_sun4i.h b/arch/arm/include/asm/arch-sunxi/clock_sun4i.h
index d297ed0..c28ee05 100644
--- a/arch/arm/include/asm/arch-sunxi/clock_sun4i.h
+++ b/arch/arm/include/asm/arch-sunxi/clock_sun4i.h
@@ -144,7 +144,16 @@ struct sunxi_ccm_reg {
 
 #define PLL1_CFG_DEFAULT	0xa1005000
 
+#if defined CONFIG_OLD_SUNXI_KERNEL_COMPAT && defined CONFIG_MACH_SUN5I
+/*
+ * Older linux-sunxi-3.4 kernels override our PLL6 setting with 300 MHz,
+ * halving the mbus frequency, so set it to 300 MHz ourselves and base the
+ * mbus divider on that.
+ */
+#define PLL6_CFG_DEFAULT	0xa1009900
+#else
 #define PLL6_CFG_DEFAULT	0xa1009911
+#endif
 
 /* nand clock */
 #define NAND_CLK_SRC_OSC24		0
-- 
2.1.0