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mx25: Fix imx_get_perclk()

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imx_get_perclk() used the AHB clock as the clock source for all PER
clocks, but the USB PLL output can also be a PER clock source if the
corresponding PER CLK MUX bit is set in CCM.MCR.

Signed-off-by: Benoît Thébaudeau <benoit@wsystem.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
This commit is contained in:
Benoît Thébaudeau 2017-05-03 11:59:04 +02:00 committed by Stefano Babic
parent 4f425280fa
commit f7c13e6a79
1 changed files with 10 additions and 1 deletions
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11
arch/arm/cpu/arm926ejs/mx25/generic.c
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@ -58,6 +58,14 @@ static ulong imx_get_mpllclk(void)
return imx_decode_pll(readl(&ccm->mpctl), fref);
}
static ulong imx_get_upllclk(void)
{
struct ccm_regs *ccm = (struct ccm_regs *)IMX_CCM_BASE;
ulong fref = MXC_HCLK;
return imx_decode_pll(readl(&ccm->upctl), fref);
}
static ulong imx_get_armclk(void)
{
struct ccm_regs *ccm = (struct ccm_regs *)IMX_CCM_BASE;
@ -95,7 +103,8 @@ static ulong imx_get_ipgclk(void)
static ulong imx_get_perclk(int clk)
{
struct ccm_regs *ccm = (struct ccm_regs *)IMX_CCM_BASE;
ulong fref = imx_get_ahbclk();
ulong fref = readl(&ccm->mcr) & (1 << clk) ? imx_get_upllclk() :
imx_get_ahbclk();
ulong div;
div = readl(&ccm->pcdr[CCM_PERCLK_REG(clk)]);