SOC_LED_CTRL
led_ctrl = readl(hc_mmio + SOC_LED_CTRL);
writel(led_ctrl | SOC_LED_CTRL_BLINK, hc_mmio + SOC_LED_CTRL);
led_ctrl = readl(hc_mmio + SOC_LED_CTRL);
writel(led_ctrl & ~SOC_LED_CTRL_BLINK, hc_mmio + SOC_LED_CTRL);