From mboxrd@z Thu Jan 1 00:00:00 1970 From: Olivier Moysan Subject: [PATCH 3/7] ASoC: cs42l51: add reset management Date: Wed, 3 Apr 2019 15:23:33 +0200 Message-ID: <1554297817-14154-4-git-send-email-olivier.moysan@st.com> References: <1554297817-14154-1-git-send-email-olivier.moysan@st.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1554297817-14154-1-git-send-email-olivier.moysan@st.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: lgirdwood@gmail.com, broonie@kernel.org, perex@perex.cz, tiwai@suse.com, mcoquelin.stm32@gmail.com, alexandre.torgue@st.com, alsa-devel@alsa-project.org, robh@kernel.org, mark.rutland@arm.com, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com, linux-kernel@vger.kernel.org, olivier.moysan@st.com, arnaud.pouliquen@st.com, benjamin.gaignard@st.com, apatard@mandriva.com List-Id: devicetree@vger.kernel.org Manage cs42l51 audio codec reset pin. Signed-off-by: Olivier Moysan --- sound/soc/codecs/cs42l51.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/sound/soc/codecs/cs42l51.c b/sound/soc/codecs/cs42l51.c index f43eb51d2d8d..9b3ffa16b204 100644 --- a/sound/soc/codecs/cs42l51.c +++ b/sound/soc/codecs/cs42l51.c @@ -30,6 +30,7 @@ #include #include #include +#include #include #include @@ -54,6 +55,7 @@ struct cs42l51_private { unsigned int audio_mode; /* The mode (I2S or left-justified) */ enum master_slave_mode func; struct regulator_bulk_data supplies[ARRAY_SIZE(cs42l51_supply_names)]; + struct gpio_desc *reset_gpio; }; #define CS42L51_FORMATS ( \ @@ -595,6 +597,17 @@ int cs42l51_probe(struct device *dev, struct regmap *regmap) return ret; } + cs42l51->reset_gpio = devm_gpiod_get_optional(dev, "reset", + GPIOD_OUT_LOW); + if (IS_ERR(cs42l51->reset_gpio)) + return PTR_ERR(cs42l51->reset_gpio); + + if (cs42l51->reset_gpio) { + dev_dbg(dev, "Release reset gpio\n"); + gpiod_set_value_cansleep(cs42l51->reset_gpio, 0); + mdelay(2); + } + /* Verify that we have a CS42L51 */ ret = regmap_read(regmap, CS42L51_CHIP_REV_ID, &val); if (ret < 0) { @@ -629,6 +642,8 @@ int cs42l51_remove(struct device *dev) { struct cs42l51_private *cs42l51 = dev_get_drvdata(dev); + gpiod_set_value_cansleep(cs42l51->reset_gpio, 1); + return regulator_bulk_disable(ARRAY_SIZE(cs42l51->supplies), cs42l51->supplies); } -- 2.7.4