diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/cpu/armv7/mx5/clock.c | 36 |
1 files changed, 24 insertions, 12 deletions
diff --git a/arch/arm/cpu/armv7/mx5/clock.c b/arch/arm/cpu/armv7/mx5/clock.c index c5a93a08ac..d7f6971a7e 100644 --- a/arch/arm/cpu/armv7/mx5/clock.c +++ b/arch/arm/cpu/armv7/mx5/clock.c @@ -331,28 +331,40 @@ static u32 get_ipg_per_clk(void) return freq / ((pred1 + 1) * (pred2 + 1) * (podf + 1)); } -/* - * Get the rate of uart clk. - */ -static u32 get_uart_clk(void) +/* Get the output clock rate of a standard PLL MUX for peripherals. */ +static u32 get_standard_pll_sel_clk(u32 clk_sel) { - unsigned int freq, reg, pred, podf; + u32 freq; - reg = readl(&mxc_ccm->cscmr1); - switch (MXC_CCM_CSCMR1_UART_CLK_SEL_RD(reg)) { - case 0x0: + switch (clk_sel & 0x3) { + case 0: freq = decode_pll(mxc_plls[PLL1_CLOCK], MXC_HCLK); break; - case 0x1: + case 1: freq = decode_pll(mxc_plls[PLL2_CLOCK], MXC_HCLK); break; - case 0x2: + case 2: freq = decode_pll(mxc_plls[PLL3_CLOCK], MXC_HCLK); break; - default: - return 66500000; + case 3: + freq = get_lp_apm(); + break; } + return freq; +} + +/* + * Get the rate of uart clk. + */ +static u32 get_uart_clk(void) +{ + unsigned int clk_sel, freq, reg, pred, podf; + + reg = readl(&mxc_ccm->cscmr1); + clk_sel = MXC_CCM_CSCMR1_UART_CLK_SEL_RD(reg); + freq = get_standard_pll_sel_clk(clk_sel); + reg = readl(&mxc_ccm->cscdr1); pred = MXC_CCM_CSCDR1_UART_CLK_PRED_RD(reg); podf = MXC_CCM_CSCDR1_UART_CLK_PODF_RD(reg); |