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@@ -247,6 +247,39 @@ static void mxs_power_setup_5v_detect(void)
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POWER_5VCTRL_PWRUP_VBUS_CMPS);
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}
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+/**
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+ * mxs_power_switch_dcdc_clocksource() - Switch PLL clock for DC-DC converters
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+ * @freqsel: One of the POWER_MISC_FREQSEL_xxx defines to select the clock
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+ *
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+ * This function configures and then enables an alternative PLL clock source
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+ * for the DC-DC converters.
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+ */
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+void mxs_power_switch_dcdc_clocksource(uint32_t freqsel)
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+{
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+ struct mxs_power_regs *power_regs =
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+ (struct mxs_power_regs *)MXS_POWER_BASE;
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+
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+ /* Select clocksource for DC-DC converters */
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+ clrsetbits_le32(&power_regs->hw_power_misc,
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+ POWER_MISC_FREQSEL_MASK,
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+ freqsel);
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+ setbits_le32(&power_regs->hw_power_misc,
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+ POWER_MISC_SEL_PLLCLK);
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+}
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+
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+/**
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+ * mxs_power_setup_dcdc_clocksource() - Setup PLL clock source for DC-DC converters
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+ *
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+ * Normally, there is no need to switch DC-DC clocksource. This is the reason,
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+ * why this function is a stub and does nothing. However, boards can implement
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+ * this function when required and call mxs_power_switch_dcdc_clocksource() to
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+ * switch to an alternative clock source.
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+ */
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+__weak void mxs_power_setup_dcdc_clocksource(void)
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+{
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+ debug("SPL: Using default DC-DC clocksource\n");
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+}
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+
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/**
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* mxs_src_power_init() - Preconfigure the power block
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*
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@@ -872,6 +905,7 @@ static void mxs_power_configure_power_source(void)
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debug("SPL: Configuring power source\n");
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+ mxs_power_setup_dcdc_clocksource();
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mxs_src_power_init();
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if (readl(&power_regs->hw_power_sts) & POWER_STS_VDD5V_GT_VDDIO) {
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