mtd: rawnand: marvell: use regmap_update_bits() for syscon access

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The marvell_nfc_init() function fiddles with some bits of a system
controller on Armada 7K/8K. However, it does a read/modify/write
sequence on GENCONF_CLK_GATING_CTRL and GENCONF_ND_CLK_CTRL, which
isn't safe from a concurrency point of view, as the regmap lock isn't
taken accross the read/modify/write sequence. To solve this issue, use
regmap_update_bits().

While at it, since the "reg" variable is no longer needed for the
read/modify/write sequences, get rid of it for the regmap_write() to
GENCONF_SOC_DEVICE_MUX, and directly pass the value to be written as
argument.

Fixes: 02f26ecf8c ("mtd: nand: add reworked Marvell NAND controller driver")
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

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Thomas Petazzoni 2018-08-02 10:56:25 +02:00 • committed by Miquel Raynal

parent 7525c9518e

commit 88aa3bbfc0

1 changed files with 11 additions and 12 deletions

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drivers/mtd/nand/raw/marvell_nand.c

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