Currently, both SDHC clock source is PLL3. We can raise clock for SDHC driver by change source from PLL3 to PLL2. Below, is debug ouputs with old and new settings.
Detection (PLL3): set clock: wanted: 400000 got: 375000 Operation (PLL3): set clock: wanted: 25000000 got: 18000000 Operation SD4.0 (PLL3): set clock: wanted: 52000000 got: 27000000 Detection (PLL2): set clock: wanted: 400000 got: 399639 Operation (PLL2): set clock: wanted: 25000000 got: 23750000 Operation SD4.0 (PLL2): set clock: wanted: 52000000 got: 41562500 Signed-off-by: Alexander Shiyan <[email protected]> --- arch/arm/mach-imx/imx51.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/arm/mach-imx/imx51.c b/arch/arm/mach-imx/imx51.c index 25cc6da..53205a9 100644 --- a/arch/arm/mach-imx/imx51.c +++ b/arch/arm/mach-imx/imx51.c @@ -269,7 +269,7 @@ void imx51_init_lowlevel(unsigned int cpufreq_mhz) writel(0xffffffff, ccm + MX5_CCM_CCGR6); /* Use PLL 2 for UART's, get 66.5MHz from it */ - writel(0xA5A2A020, ccm + MX5_CCM_CSCMR1); + writel(0xA591A020, ccm + MX5_CCM_CSCMR1); writel(0x00C30321, ccm + MX5_CCM_CSCDR1); /* make sure divider effective */ -- 1.7.3.4 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
