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imx: mx6sx: select OSC as uart's clk parent

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As M4 is sourcing UART clk from OSC, to make UART work
when M4 is enabled, need to select OSC as clk parent,
24M OSC is enough for debug UART in uboot.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
This commit is contained in:
Peng Fan 2017-08-08 16:21:38 +08:00 • committed by Stefano Babic
parent 79a57b5ae1
commit 7236297aee
1 changed files with 5 additions and 0 deletions
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5
arch/arm/mach-imx/mx6/soc.c
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@ -379,6 +379,8 @@ static void set_preclk_from_osc(void)
int arch_cpu_init(void)
{
struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
init_aips();
/* Need to clear MMDC_CHx_MASK to make warm reset work. */
@ -448,6 +450,9 @@ int arch_cpu_init(void)
imx_set_wdog_powerdown(false); /* Disable PDE bit of WMCR register */
if (is_mx6sx())
setbits_le32(&ccm->cscdr1, MXC_CCM_CSCDR1_UART_CLK_SEL);
init_src();
return 0;