HOST_EM_CTL
em_ctl = readl(mmio + HOST_EM_CTL);
writel(em_ctl | EM_CTL_RST, mmio + HOST_EM_CTL);
em_ctl = readl(mmio + HOST_EM_CTL);
writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL);
u32 em_ctl = readl(mmio + HOST_EM_CTL);
em_ctl = readl(mmio + HOST_EM_CTL);
em_ctl = readl(mmio + HOST_EM_CTL);
writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL);
em_ctl = readl(mmio + HOST_EM_CTL);