diff options
Diffstat (limited to 'arch/arm/mach-mxs/clock-mx28.c')
| -rw-r--r-- | arch/arm/mach-mxs/clock-mx28.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/arm/mach-mxs/clock-mx28.c b/arch/arm/mach-mxs/clock-mx28.c index 5e489a2b2023..1ad97fed1e94 100644 --- a/arch/arm/mach-mxs/clock-mx28.c +++ b/arch/arm/mach-mxs/clock-mx28.c @@ -618,6 +618,8 @@ static struct clk_lookup lookups[] = { _REGISTER_CLOCK("pll2", NULL, pll2_clk) _REGISTER_CLOCK("mxs-dma-apbh", NULL, hbus_clk) _REGISTER_CLOCK("mxs-dma-apbx", NULL, xbus_clk) + _REGISTER_CLOCK("mxs-mmc.0", NULL, ssp0_clk) + _REGISTER_CLOCK("mxs-mmc.1", NULL, ssp1_clk) _REGISTER_CLOCK("flexcan.0", NULL, can0_clk) _REGISTER_CLOCK("flexcan.1", NULL, can1_clk) _REGISTER_CLOCK(NULL, "usb0", usb0_clk) @@ -737,6 +739,15 @@ static int clk_misc_init(void) reg |= BM_CLKCTRL_ENET_CLK_OUT_EN; __raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_ENET); + /* + * 480 MHz seems too high to be ssp clock source directly, + * so set frac0 to get a 288 MHz ref_io0. + */ + reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_FRAC0); + reg &= ~BM_CLKCTRL_FRAC0_IO0FRAC; + reg |= 30 << BP_CLKCTRL_FRAC0_IO0FRAC; + __raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_FRAC0); + return 0; } @@ -744,6 +755,13 @@ int __init mx28_clocks_init(void) { clk_misc_init(); + /* + * source ssp clock from ref_io0 than ref_xtal, + * as ref_xtal only provides 24 MHz as maximum. + */ + clk_set_parent(&ssp0_clk, &ref_io0_clk); + clk_set_parent(&ssp1_clk, &ref_io0_clk); + clk_enable(&cpu_clk); clk_enable(&hbus_clk); clk_enable(&xbus_clk); |
