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Murphy" , Daniele Alessandrelli , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski Cc: Alexander Stein , linux-media@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH 5/6] media: i2c: ov9282: Add regulator support Date: Mon, 11 Jul 2022 10:16:38 +0200 Message-Id: <20220711081639.150153-6-alexander.stein@ew.tq-group.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220711081639.150153-1-alexander.stein@ew.tq-group.com> References: <20220711081639.150153-1-alexander.stein@ew.tq-group.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Need in case the sensors is supplied by a switchable regulator. Signed-off-by: Alexander Stein --- drivers/media/i2c/ov9282.c | 41 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/drivers/media/i2c/ov9282.c b/drivers/media/i2c/ov9282.c index 04fda8222e07..c3faf11a99b5 100644 --- a/drivers/media/i2c/ov9282.c +++ b/drivers/media/i2c/ov9282.c @@ -11,6 +11,7 @@ #include #include #include +#include #include #include @@ -55,6 +56,14 @@ #define OV9282_REG_MIN 0x00 #define OV9282_REG_MAX 0xfffff +static const char * const ov9282_supply_names[] = { + "avdd", /* Analog power */ + "dovdd", /* Digital I/O power */ + "dvdd", /* Digital core power */ +}; + +#define OV9282_NUM_SUPPLIES ARRAY_SIZE(ov9282_supply_names) + /** * struct ov9282_reg - ov9282 sensor register * @address: Register address @@ -127,6 +136,7 @@ struct ov9282 { struct media_pad pad; struct gpio_desc *reset_gpio; struct clk *inclk; + struct regulator_bulk_data supplies[OV9282_NUM_SUPPLIES]; struct v4l2_ctrl_handler ctrl_handler; struct v4l2_ctrl *link_freq_ctrl; struct v4l2_ctrl *pclk_ctrl; @@ -883,10 +893,18 @@ static int ov9282_power_on(struct device *dev) goto error_reset; } + ret = regulator_bulk_enable(ARRAY_SIZE(ov9282->supplies), ov9282->supplies); + if (ret) { + dev_err(dev, "Failed to enable regulators\n"); + goto disable_clk; + } + usleep_range(400, 600); return 0; +disable_clk: + clk_disable_unprepare(ov9282->inclk); error_reset: gpiod_set_value_cansleep(ov9282->reset_gpio, 0); @@ -903,6 +921,11 @@ static int ov9282_power_off(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct ov9282 *ov9282 = to_ov9282(sd); + int ret; + + ret = regulator_bulk_disable(ARRAY_SIZE(ov9282->supplies), ov9282->supplies); + if (ret) + dev_err(ov9282->dev, "Failed to disable supplies: %d\n", ret); gpiod_set_value_cansleep(ov9282->reset_gpio, 0); @@ -996,6 +1019,18 @@ static int ov9282_init_controls(struct ov9282 *ov9282) return 0; } +static int ov9282_configure_regulators(struct ov9282 *ov9282) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(ov9282->supplies); i++) + ov9282->supplies[i].supply = ov9282_supply_names[i]; + + return devm_regulator_bulk_get(ov9282->dev, + ARRAY_SIZE(ov9282->supplies), + ov9282->supplies); +} + /** * ov9282_probe() - I2C client device binding * @client: pointer to i2c client device @@ -1022,6 +1057,12 @@ static int ov9282_probe(struct i2c_client *client) return ret; } + ret = ov9282_configure_regulators(ov9282); + if (ret) { + dev_err(&client->dev, "Failed to get power regulators\n"); + return ret; + } + mutex_init(&ov9282->mutex); ret = ov9282_power_on(ov9282->dev); -- 2.25.1