imx-common: add i2c.c for bus recovery support

[u-boot] / arch / arm / cpu / armv7 / mx6 / clock.c

diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c
index 52d5dc4d90b9614a3156dd822a28b4c15c05cdb2..fddb3733ae28aeba30ea8c953c29153dcca7a4a9 100644 (file)
--- a/arch/arm/cpu/armv7/mx6/clock.c
+++ b/arch/arm/cpu/armv7/mx6/clock.c
@@ -50,6 +50,26 @@ void enable_usboh3_clk(unsigned char enable)
 
 }
 
+#ifdef CONFIG_I2C_MXC
+/* i2c_num can be from 0 - 2 */
+int enable_i2c_clk(unsigned char enable, unsigned i2c_num)
+{
+       u32 reg;
+       u32 mask;
+
+       if (i2c_num > 2)
+               return -EINVAL;
+       mask = MXC_CCM_CCGR_CG_MASK << ((i2c_num + 3) << 1);
+       reg = __raw_readl(&imx_ccm->CCGR2);
+       if (enable)
+               reg |= mask;
+       else
+               reg &= ~mask;
+       __raw_writel(reg, &imx_ccm->CCGR2);
+       return 0;
+}
+#endif
+
 static u32 decode_pll(enum pll_clocks pll, u32 infreq)
 {
        u32 div;