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[84.115.213.37]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a8d25a258a3sm865945666b.89.2024.09.13.06.19.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Sep 2024 06:19:23 -0700 (PDT) From: Javier Carrasco Date: Fri, 13 Sep 2024 15:19:01 +0200 Subject: [PATCH 6/7] iio: light: veml6030: add set up delay after any power on sequence Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240913-veml6035-v1-6-0b09c0c90418@gmail.com> References: <20240913-veml6035-v1-0-0b09c0c90418@gmail.com> In-Reply-To: <20240913-veml6035-v1-0-0b09c0c90418@gmail.com> To: Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Rishi Gupta Cc: linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Jonathan Cameron , Javier Carrasco X-Mailer: b4 0.14-dev X-Developer-Signature: v=1; a=ed25519-sha256; t=1726233553; l=1500; i=javier.carrasco.cruz@gmail.com; s=20240312; h=from:subject:message-id; bh=c0ILQnyW+ImdjeGc6T+fx6mOz4Ws/4vgy5ONpaMk9/4=; b=6IYpwTsCFf+E/BhF9e8v/iPVGpBPPB7W8gcWpwjOVyGwNfs34nmf7TJ+VhiX+npkS3ph1q1ci jj4F7VF/ahXBgYZ1ugGPDJpJu5l61iQL0xJUchd+1avYEBLTwzdpnmo X-Developer-Key: i=javier.carrasco.cruz@gmail.com; a=ed25519; pk=lzSIvIzMz0JhJrzLXI0HAdPwsNPSSmEn6RbS+PTS9aQ= The veml6030 requires a delay of 4 ms after activating the sensor. That is done correctly during the hw initialization, but it's missing after resuming. Move the delay to the power on function to make sure that it is always observerd. Signed-off-by: Javier Carrasco --- drivers/iio/light/veml6030.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/iio/light/veml6030.c b/drivers/iio/light/veml6030.c index d5add040d0b3..2945cc1db599 100644 --- a/drivers/iio/light/veml6030.c +++ b/drivers/iio/light/veml6030.c @@ -143,8 +143,17 @@ static const struct attribute_group veml6030_event_att= r_group =3D { =20 static int veml6030_als_pwr_on(struct veml6030_data *data) { - return regmap_clear_bits(data->regmap, VEML6030_REG_ALS_CONF, + int ret; + + ret =3D regmap_clear_bits(data->regmap, VEML6030_REG_ALS_CONF, VEML6030_ALS_SD); + if (ret) + return ret; + + /* Wait 4 ms to let processor & oscillator start correctly */ + usleep_range(4000, 4002); + + return 0; } =20 static int veml6030_als_shut_down(struct veml6030_data *data) @@ -766,9 +775,6 @@ static int veml6030_hw_init(struct iio_dev *indio_dev) return ret; } =20 - /* Wait 4 ms to let processor & oscillator start correctly */ - usleep_range(4000, 4002); - /* Clear stale interrupt status bits if any during start */ ret =3D regmap_read(data->regmap, VEML6030_REG_ALS_INT, &val); if (ret < 0) { --=20 2.43.0