linux-kernel - [PATCH v1] clk: rockchip: add pll_wait_lock for pll

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Date:   Wed, 22 Feb 2017 10:59:55 +0800
From:   Elaine Zhang <zhangqing@...k-chips.com>
To:     heiko@...ech.de, mturquette@...libre.com, sboyd@...eaurora.org,
        xf@...k-chips.com
Cc:     linux-clk@...r.kernel.org, huangtao@...k-chips.com,
        xxx@...k-chips.com, linux-rockchip@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Elaine Zhang <zhangqing@...k-chips.com>
Subject: [PATCH v1] clk: rockchip: add pll_wait_lock for pll_enable

If pll is power down,when power up pll need wait pll lock.
The reference documents section:
	PLL frequency change and lock check

Signed-off-by: Elaine Zhang <zhangqing@...k-chips.com>
---
 drivers/clk/rockchip/clk-pll.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/clk/rockchip/clk-pll.c b/drivers/clk/rockchip/clk-pll.c
index 6ed605776abd..c4dfd26f37ae 100644
--- a/drivers/clk/rockchip/clk-pll.c
+++ b/drivers/clk/rockchip/clk-pll.c
@@ -268,6 +268,7 @@ static int rockchip_rk3036_pll_enable(struct clk_hw *hw)
 
 	writel(HIWORD_UPDATE(0, RK3036_PLLCON1_PWRDOWN, 0),
 	       pll->reg_base + RK3036_PLLCON(1));
+	rockchip_pll_wait_lock(pll);
 
 	return 0;
 }
@@ -500,6 +501,7 @@ static int rockchip_rk3066_pll_enable(struct clk_hw *hw)
 
 	writel(HIWORD_UPDATE(0, RK3066_PLLCON3_PWRDOWN, 0),
 	       pll->reg_base + RK3066_PLLCON(3));
+	rockchip_pll_wait_lock(pll);
 
 	return 0;
 }
@@ -745,6 +747,7 @@ static int rockchip_rk3399_pll_enable(struct clk_hw *hw)
 
 	writel(HIWORD_UPDATE(0, RK3399_PLLCON3_PWRDOWN, 0),
 	       pll->reg_base + RK3399_PLLCON(3));
+	rockchip_rk3399_pll_wait_lock(pll);
 
 	return 0;
 }
-- 
1.9.1