MXC_SRPG_EMPGC0_SRPGCR
empgc0 = imx_readl(gpc_base + MXC_SRPG_EMPGC0_SRPGCR) &
imx_writel(empgc0, gpc_base + MXC_SRPG_EMPGC0_SRPGCR);
imx_writel(0, gpc_base + MXC_SRPG_EMPGC0_SRPGCR);