writel(0, &mxc_ccm->ccdr);
}
+static void init_bandgap(void)
+{
+ struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
+ /*
+ * Ensure the bandgap has stabilized.
+ */
+ while (!(readl(&anatop->ana_misc0) & 0x80))
+ ;
+ /*
+ * For best noise performance of the analog blocks using the
+ * outputs of the bandgap, the reftop_selfbiasoff bit should
+ * be set.
+ */
+ writel(BM_ANADIG_ANA_MISC0_REFTOP_SELBIASOFF, &anatop->ana_misc0_set);
+}
+
+
#ifdef CONFIG_MX6SL
static void set_preclk_from_osc(void)
{
clear_mmdc_ch_mask();
/*
+ * Disable self-bias circuit in the analog bandap.
+ * The self-bias circuit is used by the bandgap during startup.
+ * This bit should be set after the bandgap has initialized.
+ */
+ init_bandgap();
+
+ /*
* When low freq boot is enabled, ROM will not set AHB
* freq, so we need to ensure AHB freq is 132MHz in such
* scenario.
#define BF_ANADIG_PFD_528_PFD0_FRAC(v) \
(((v) << 0) & BM_ANADIG_PFD_528_PFD0_FRAC)
+#define BM_ANADIG_ANA_MISC0_REFTOP_SELBIASOFF 0x00000008
+
#endif /*__ARCH_ARM_MACH_MX6_CCM_REGS_H__ */