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sunxi: Fix sun5i mbus speed when booting old kernels

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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@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
This commit is contained in:
Hans de Goede 2015-02-19 14:46:44 +01:00
parent 52defe8f65
commit f388a26d11
1 changed files with 9 additions and 0 deletions
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9
arch/arm/include/asm/arch-sunxi/clock_sun4i.h
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@ -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