linux-kernel - [PATCH 1/2] ARM: rockchip: decrease the wait time for resume

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Message-Id: <1423487543-10593-1-git-send-email-zyw@rock-chips.com>
Date:	Mon,  9 Feb 2015 21:12:22 +0800
From:	Chris Zhong <zyw@...k-chips.com>
To:	heiko@...ech.de, dianders@...omium.org, djkurtz@...omium.org,
	sonnyrao@...omium.org
Cc:	linux-rockchip@...ts.infradead.org,
	Chris Zhong <zyw@...k-chips.com>,
	Russell King <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] ARM: rockchip: decrease the wait time for resume

The delay time for wait the 24MHz OSC stabilization is 750ms, and the
delay time for wait the external PMU stabilization is 750ms too, let's
decrease them to 30ms.

Signed-off-by: Chris Zhong <zyw@...k-chips.com>
---

 arch/arm/mach-rockchip/pm.c | 3 +++
 arch/arm/mach-rockchip/pm.h | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/arch/arm/mach-rockchip/pm.c b/arch/arm/mach-rockchip/pm.c
index 50cb781..a3ab397 100644
--- a/arch/arm/mach-rockchip/pm.c
+++ b/arch/arm/mach-rockchip/pm.c
@@ -209,6 +209,9 @@ static int rk3288_suspend_init(struct device_node *np)
 	memcpy(rk3288_bootram_base, rockchip_slp_cpu_resume,
 	       rk3288_bootram_sz);
 
+	regmap_write(pmu_regmap, RK3288_PMU_OSC_CNT, OSC_STABL_CNT_THRESH);
+	regmap_write(pmu_regmap, RK3288_PMU_STABL_CNT, PMU_STABL_CNT_THRESH);
+
 	return 0;
 }
 
diff --git a/arch/arm/mach-rockchip/pm.h b/arch/arm/mach-rockchip/pm.h
index 7d752ff..96beaa0 100644
--- a/arch/arm/mach-rockchip/pm.h
+++ b/arch/arm/mach-rockchip/pm.h
@@ -57,6 +57,10 @@ void __init rockchip_suspend_init(void);
 /* PMU_WAKEUP_CFG1 bits */
 #define PMU_ARMINT_WAKEUP_EN		BIT(0)
 
+/* wait 30ms for OSC stable and 30ms for pmic stable */
+#define OSC_STABL_CNT_THRESH	(32 * 30)
+#define PMU_STABL_CNT_THRESH	(32 * 30)
+
 enum rk3288_pwr_mode_con {
 	PMU_PWR_MODE_EN = 0,
 	PMU_CLK_CORE_SRC_GATE_EN,
-- 
1.9.1

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