From: wlf <wulf@rock-chips.com>
Date: Tue, 5 Mar 2013 07:11:59 +0000 (+0800)
Subject: RK3188 USB: disable usb bypass uart function in standby, reduce power consumption
X-Git-Tag: firefly_0821_release~7478
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4ebbf925a386f2f72d870ce79b5821f17f3be381;p=firefly-linux-kernel-4.4.55.git

RK3188 USB: disable usb bypass uart function in standby, reduce power consumption
---

diff --git a/arch/arm/mach-rk30/pm.c b/arch/arm/mach-rk30/pm.c
index 2ad5e41c0a48..d27b1c67c6da 100755
--- a/arch/arm/mach-rk30/pm.c
+++ b/arch/arm/mach-rk30/pm.c
@@ -457,6 +457,7 @@ static void __sramfunc rk30_sram_suspend(void)
 	u32 cru_clksel0_con, cru_clksel10_con;
 	u32 clkgt_regs[CRU_CLKGATES_CON_CNT];
 	u32 cru_mode_con;
+	u32 grf_uoc0_con0_status;
 	int i;
 	
 	sram_printch('5');
@@ -469,6 +470,13 @@ static void __sramfunc rk30_sram_suspend(void)
 	board_act8846_set_suspend_vol();
 	#endif
 
+#if defined(CONFIG_ARCH_RK3188) && (CONFIG_RK_DEBUG_UART == 2)
+#ifdef CONFIG_RK_USB_UART
+	grf_uoc0_con0_status = grf_readl(GRF_UOC0_CON0);
+	grf_writel(0x03000000, GRF_UOC0_CON0);
+#endif
+#endif
+
 	for (i = 0; i < CRU_CLKGATES_CON_CNT; i++) {
 		clkgt_regs[i] = cru_readl(CRU_CLKGATES_CON(i));
 	}
@@ -555,6 +563,13 @@ static void __sramfunc rk30_sram_suspend(void)
 	#ifdef CONFIG_ACT8846_SUPPORT_RESET
 	board_act8846_set_resume_vol();
 	#endif
+
+#if defined(CONFIG_ARCH_RK3188) && (CONFIG_RK_DEBUG_UART == 2)
+#ifdef CONFIG_RK_USB_UART
+	grf_writel(0x03000000 | grf_uoc0_con0_status, GRF_UOC0_CON0);
+#endif
+#endif
+
 	sram_printch('7');
 	rk30_pwm_logic_resume_voltage();
 	rk30_suspend_voltage_resume(1100000);