linux-kernel - [PATCH v3 10/11] ASoC: sun4i-i2s: Update global enable with bitmask

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20170812110059.5115-11-codekipper@gmail.com>
Date:   Sat, 12 Aug 2017 13:00:58 +0200
From:   codekipper@...il.com
To:     maxime.ripard@...e-electrons.com
Cc:     linux-arm-kernel@...ts.infradead.org, linux-sunxi@...glegroups.com,
        lgirdwood@...il.com, broonie@...nel.org,
        linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
        be17068@...rbole.bo.it, Marcus Cooper <codekipper@...il.com>
Subject: [PATCH v3 10/11] ASoC: sun4i-i2s: Update global enable with bitmask

From: Marcus Cooper <codekipper@...il.com>

The default value of the config register is different on newer
SoCs and therefore enabling/disabling with a register write
will clear bits used to set the direction of the clock and frame
pins.

Signed-off-by: Marcus Cooper <codekipper@...il.com>
Reviewed-by: Chen-Yu Tsai <wens@...e.org>
---
 sound/soc/sunxi/sun4i-i2s.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
index 475572e1c586..a6b464c8cc6c 100644
--- a/sound/soc/sunxi/sun4i-i2s.c
+++ b/sound/soc/sunxi/sun4i-i2s.c
@@ -529,8 +529,8 @@ static int sun4i_i2s_startup(struct snd_pcm_substream *substream,
 	struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
 
 	/* Enable the whole hardware block */
-	regmap_write(i2s->regmap, SUN4I_I2S_CTRL_REG,
-		     SUN4I_I2S_CTRL_GL_EN);
+	regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
+			   SUN4I_I2S_CTRL_GL_EN, SUN4I_I2S_CTRL_GL_EN);
 
 	/* Enable the first output line */
 	regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
@@ -553,7 +553,8 @@ static void sun4i_i2s_shutdown(struct snd_pcm_substream *substream,
 			   SUN4I_I2S_CTRL_SDO_EN_MASK, 0);
 
 	/* Disable the whole hardware block */
-	regmap_write(i2s->regmap, SUN4I_I2S_CTRL_REG, 0);
+	regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
+			   SUN4I_I2S_CTRL_GL_EN, 0);
 }
 
 static int sun4i_i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id,
-- 
2.14.1