linux-kernel - [PATCH RFC/RFT] regulator: palmas: Clear PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK bits in palmas_set_mode

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Date:	Thu, 07 Jun 2012 17:08:21 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Graeme Gregory <gg@...mlogic.co.uk>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Liam Girdwood <lrg@...com>
Subject: [PATCH RFC/RFT] regulator: palmas: Clear
 PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK bits in palmas_set_mode_smps

Current code actually clears more bits than PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK bits.

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
Hi Graeme,

I'm wandering if we need to clear the status bits.
Current code actually clears bit[7:4] and bit[1:0] and set bit[7:6] to bit[3:2].
Looks like we only need to clear PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK bit[1:0] bits here.
and this change makes the intent more clear.

I don't have this hardware,
I'd appreciate if you can test this patch if you think this change ok.

Regards,
Axel
 drivers/regulator/palmas-regulator.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/regulator/palmas-regulator.c b/drivers/regulator/palmas-regulator.c
index 92f475c..ae0951a 100644
--- a/drivers/regulator/palmas-regulator.c
+++ b/drivers/regulator/palmas-regulator.c
@@ -257,8 +257,7 @@ static int palmas_set_mode_smps(struct regulator_dev *dev, unsigned int mode)
 	unsigned int reg;
 
 	palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
-	reg &= ~PALMAS_SMPS12_CTRL_STATUS_MASK;
-	reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;
+	reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 
 	switch (mode) {
 	case REGULATOR_MODE_NORMAL:
-- 
1.7.9.5



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