From fca3d4b1074fbc3ca74db040f6abdf9b614df819 Mon Sep 17 00:00:00 2001
From: Liu Ying <victor.liu@nxp.com>
Date: Fri, 13 Oct 2017 11:47:51 +0800
Subject: [PATCH] MLK-16581-2 phy: mixel-lvds-combo: Get PHY clock rate before
setting it's rate
Due to i.MX8 clock issue, we need to get PHY clock rate
before setting it's rate when system resumes back from
PM sleep mode, otherwise, we'll fail to set the clock rate.
So, this is a workaround and it can be removed when
the clock issue is properly fixed.
Signed-off-by: Liu Ying <victor.liu@nxp.com>
---
drivers/phy/phy-mixel-lvds-combo.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/phy/phy-mixel-lvds-combo.c b/drivers/phy/phy-mixel-lvds-combo.c
index 9d3d469872903a..3b888b110e0d10 100644
--- a/drivers/phy/phy-mixel-lvds-combo.c
+++ b/drivers/phy/phy-mixel-lvds-combo.c
@@ -96,6 +96,13 @@ void mixel_phy_combo_lvds_set_phy_speed(struct phy *phy,
{
struct mixel_lvds_phy *lvds_phy = phy_get_drvdata(phy);
+ /*
+ * To workaround setting clock rate failure issue
+ * when the system resumes back from PM sleep mode,
+ * we need to get the clock rate before setting it's
+ * rate, otherwise, setting the clock rate will fail.
+ */
+ clk_get_rate(lvds_phy->phy_clk);
clk_set_rate(lvds_phy->phy_clk, phy_clk_rate);
}
EXPORT_SYMBOL_GPL(mixel_phy_combo_lvds_set_phy_speed);
--
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