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Mon, 15 Apr 2024 09:41:51 +0000 (UTC) Received: from localhost.localdomain (unknown [10.39.195.17]) by smtp.corp.redhat.com (Postfix) with ESMTP id 44C50492BC8; Mon, 15 Apr 2024 09:41:50 +0000 (UTC) From: Hans de Goede To: Sakari Ailus , Rui Miguel Silva Cc: Hans de Goede , Mauro Carvalho Chehab , Kate Hsuan , Kieran Bingham , linux-media@vger.kernel.org Subject: [PATCH resend 4/4] media: hi556: Add support for avdd regulator Date: Mon, 15 Apr 2024 11:41:33 +0200 Message-ID: <20240415094133.210580-5-hdegoede@redhat.com> In-Reply-To: <20240415094133.210580-1-hdegoede@redhat.com> References: <20240415094133.210580-1-hdegoede@redhat.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.9 X-LSpam-Score: -4.3 (----) X-LSpam-Report: No, score=-4.3 required=5.0 tests=ARC_SIGNED=0.001,ARC_VALID=-0.1,BAYES_00=-1.9,DKIMWL_WL_HIGH=-1,DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,DMARC_PASS=-0.001,HEADER_FROM_DIFFERENT_DOMAINS=0.5,MAILING_LIST_MULTI=-1,RCVD_IN_DNSWL_LOW=-0.7,SPF_HELO_NONE=0.001,SPF_PASS=-0.001 autolearn=ham autolearn_force=no On some ACPI platforms, such as Chromebooks the ACPI methods to change the power-state (_PS0 and _PS3) fully take care of powering on/off the sensor. On other ACPI platforms, such as e.g. various HP models with IPU6 + hi556 sensor, the sensor driver must control the avdd regulator itself. Add support for having the driver control the sensor's avdd regulator. Note this relies on the regulator-core providing a dummy regulator (which it does by default) on platforms where Linux is not aware of the avdd regulator. Signed-off-by: Hans de Goede --- drivers/media/i2c/hi556.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/media/i2c/hi556.c b/drivers/media/i2c/hi556.c index b783e0f56687..5641c249d4b1 100644 --- a/drivers/media/i2c/hi556.c +++ b/drivers/media/i2c/hi556.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include #include @@ -638,6 +639,7 @@ struct hi556 { /* GPIOs, clocks, etc. */ struct gpio_desc *reset_gpio; struct clk *clk; + struct regulator *avdd; /* Current mode */ const struct hi556_mode *cur_mode; @@ -1286,8 +1288,17 @@ static int hi556_suspend(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct hi556 *hi556 = to_hi556(sd); + int ret; gpiod_set_value_cansleep(hi556->reset_gpio, 1); + + ret = regulator_disable(hi556->avdd); + if (ret) { + dev_err(dev, "failed to disable avdd: %d\n", ret); + gpiod_set_value_cansleep(hi556->reset_gpio, 0); + return ret; + } + clk_disable_unprepare(hi556->clk); return 0; } @@ -1302,6 +1313,13 @@ static int hi556_resume(struct device *dev) if (ret) return ret; + ret = regulator_enable(hi556->avdd); + if (ret) { + dev_err(dev, "failed to enable avdd: %d\n", ret); + clk_disable_unprepare(hi556->clk); + return ret; + } + gpiod_set_value_cansleep(hi556->reset_gpio, 0); usleep_range(5000, 5500); return 0; @@ -1337,6 +1355,12 @@ static int hi556_probe(struct i2c_client *client) return dev_err_probe(&client->dev, PTR_ERR(hi556->clk), "failed to get clock\n"); + /* The regulator core will provide a "dummy" regulator if necessary */ + hi556->avdd = devm_regulator_get(&client->dev, "avdd"); + if (IS_ERR(hi556->avdd)) + return dev_err_probe(&client->dev, PTR_ERR(hi556->avdd), + "failed to get avdd regulator\n"); + full_power = acpi_dev_state_d0(&client->dev); if (full_power) { /* Ensure non ACPI managed resources are enabled */