linux-kernel - [PATCH] mfd: ti_am335x_tscadc: Update reg

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Date:	Tue, 13 Aug 2013 17:40:56 +0100
From:	Zubair Lutfullah <zubair.lutfullah@...il.com>
To:	sameo@...ux.intel.com, lee.jones@...aro.org
Cc:	linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org
Subject: [PATCH] mfd: ti_am335x_tscadc: Update reg_cache variable in clr function

The reg_cache variable should be updated with current
steps in the reg_se register. Then the mask should
apply and clear the register. Previously, the reg_cache
can be an old redundant value that isn't updated.

Signed-off-by: Zubair Lutfullah <zubair.lutfullah@...il.com>
---
 drivers/mfd/ti_am335x_tscadc.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mfd/ti_am335x_tscadc.c b/drivers/mfd/ti_am335x_tscadc.c
index 9f3f07a..baaf5a8 100644
--- a/drivers/mfd/ti_am335x_tscadc.c
+++ b/drivers/mfd/ti_am335x_tscadc.c
@@ -67,10 +67,10 @@ EXPORT_SYMBOL_GPL(am335x_tsc_se_set);
 void am335x_tsc_se_clr(struct ti_tscadc_dev *tsadc, u32 val)
 {
 	spin_lock(&tsadc->reg_lock);
+	tsadc->reg_se_cache = tscadc_readl(tsadc, REG_SE);
 	tsadc->reg_se_cache &= ~val;
-	spin_unlock(&tsadc->reg_lock);
-
 	am335x_tsc_se_update(tsadc);
+	spin_unlock(&tsadc->reg_lock);
 }
 EXPORT_SYMBOL_GPL(am335x_tsc_se_clr);
 
-- 
1.7.9.5

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