From: Rick Bronson rick@efn.org
Allow higher UART baud rates for communications to ACHC at 13.5 MBaud Done in u-boot since it changes a divider common to all UARTs, including the console. If it were done in Linux we would get garbled characters during the handoff from u-boot to the kernel.
Signed-off-by: Sebastian Reichel sebastian.reichel@collabora.co.uk --- arch/arm/mach-imx/mx5/lowlevel_init.S | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/arch/arm/mach-imx/mx5/lowlevel_init.S b/arch/arm/mach-imx/mx5/lowlevel_init.S index f5bc6728b7c2..ee4c3afd2fed 100644 --- a/arch/arm/mach-imx/mx5/lowlevel_init.S +++ b/arch/arm/mach-imx/mx5/lowlevel_init.S @@ -319,11 +319,13 @@ setup_pll_func: ldr r1, =0x00016154 str r1, [r0, #CLKCTL_CBCMR]
+#if !defined(CONFIG_TARGET_MX53PPD) /*change uart clk parent to pll2*/ ldr r1, [r0, #CLKCTL_CSCMR1] and r1, r1, #0xfcffffff orr r1, r1, #0x01000000 str r1, [r0, #CLKCTL_CSCMR1] +#endif
/* make sure change is effective */ 1: ldr r1, [r0, #CLKCTL_CDHIPR] @@ -350,7 +352,9 @@ setup_pll_func: /* make uart div=6 */ ldr r1, [r0, #CLKCTL_CSCDR1] and r1, r1, #0xffffffc0 +#if !defined(CONFIG_TARGET_MX53PPD) orr r1, r1, #0x0a +#endif str r1, [r0, #CLKCTL_CSCDR1]
/* Restore the default values in the Gate registers */