MXC_SRPG_EMPGC1_SRPGCR
empgc1 = imx_readl(gpc_base + MXC_SRPG_EMPGC1_SRPGCR) &
imx_writel(empgc1, gpc_base + MXC_SRPG_EMPGC1_SRPGCR);
imx_writel(0, gpc_base + MXC_SRPG_EMPGC1_SRPGCR);