From a14e84dbce2eeebde5e9aacd8bb49e85c1e1a067 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 8 Nov 2022 11:06:04 +0100 Subject: [PATCH] media: s5c73m3: Switch to GPIO descriptors The driver has an option to pass in GPIO numbers from platform data but this is not used in the kernel so delete this. Get GPIO descriptors using the standard API and simplify the code, gpiolib will handle any inversions. Cc: Sylwester Nawrocki Cc: Andrzej Hajda Cc: Alim Akhtar Reviewed-by: Andrzej Hajda Acked-by: Krzysztof Kozlowski Signed-off-by: Linus Walleij Signed-off-by: Hans Verkuil --- drivers/media/i2c/s5c73m3/s5c73m3-core.c | 107 ++++++------------------------ drivers/media/i2c/s5c73m3/s5c73m3-ctrls.c | 1 - drivers/media/i2c/s5c73m3/s5c73m3.h | 10 +-- include/media/i2c/s5c73m3.h | 15 ----- 4 files changed, 23 insertions(+), 110 deletions(-) diff --git a/drivers/media/i2c/s5c73m3/s5c73m3-core.c b/drivers/media/i2c/s5c73m3/s5c73m3-core.c index d96ba58..59b03b0 100644 --- a/drivers/media/i2c/s5c73m3/s5c73m3-core.c +++ b/drivers/media/i2c/s5c73m3/s5c73m3-core.c @@ -10,12 +10,11 @@ #include #include #include -#include +#include #include #include #include #include -#include #include #include #include @@ -1347,24 +1346,6 @@ static int s5c73m3_oif_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) return 0; } -static int s5c73m3_gpio_set_value(struct s5c73m3 *priv, int id, u32 val) -{ - if (!gpio_is_valid(priv->gpio[id].gpio)) - return 0; - gpio_set_value(priv->gpio[id].gpio, !!val); - return 1; -} - -static int s5c73m3_gpio_assert(struct s5c73m3 *priv, int id) -{ - return s5c73m3_gpio_set_value(priv, id, priv->gpio[id].level); -} - -static int s5c73m3_gpio_deassert(struct s5c73m3 *priv, int id) -{ - return s5c73m3_gpio_set_value(priv, id, !priv->gpio[id].level); -} - static int __s5c73m3_power_on(struct s5c73m3 *state) { int i, ret; @@ -1386,10 +1367,9 @@ static int __s5c73m3_power_on(struct s5c73m3 *state) v4l2_dbg(1, s5c73m3_dbg, &state->oif_sd, "clock frequency: %ld\n", clk_get_rate(state->clock)); - s5c73m3_gpio_deassert(state, STBY); + gpiod_set_value(state->stby, 0); usleep_range(100, 200); - - s5c73m3_gpio_deassert(state, RSET); + gpiod_set_value(state->reset, 0); usleep_range(50, 100); return 0; @@ -1404,11 +1384,10 @@ static int __s5c73m3_power_off(struct s5c73m3 *state) { int i, ret; - if (s5c73m3_gpio_assert(state, RSET)) - usleep_range(10, 50); - - if (s5c73m3_gpio_assert(state, STBY)) - usleep_range(100, 200); + gpiod_set_value(state->reset, 1); + usleep_range(10, 50); + gpiod_set_value(state->stby, 1); + usleep_range(100, 200); clk_disable_unprepare(state->clock); @@ -1543,58 +1522,10 @@ static const struct v4l2_subdev_ops oif_subdev_ops = { .video = &s5c73m3_oif_video_ops, }; -static int s5c73m3_configure_gpios(struct s5c73m3 *state) -{ - static const char * const gpio_names[] = { - "S5C73M3_STBY", "S5C73M3_RST" - }; - struct i2c_client *c = state->i2c_client; - struct s5c73m3_gpio *g = state->gpio; - int ret, i; - - for (i = 0; i < GPIO_NUM; ++i) { - unsigned int flags = GPIOF_DIR_OUT; - if (g[i].level) - flags |= GPIOF_INIT_HIGH; - ret = devm_gpio_request_one(&c->dev, g[i].gpio, flags, - gpio_names[i]); - if (ret) { - v4l2_err(c, "failed to request gpio %s\n", - gpio_names[i]); - return ret; - } - } - return 0; -} - -static int s5c73m3_parse_gpios(struct s5c73m3 *state) -{ - static const char * const prop_names[] = { - "standby-gpios", "xshutdown-gpios", - }; - struct device *dev = &state->i2c_client->dev; - struct device_node *node = dev->of_node; - int ret, i; - - for (i = 0; i < GPIO_NUM; ++i) { - enum of_gpio_flags of_flags; - - ret = of_get_named_gpio_flags(node, prop_names[i], - 0, &of_flags); - if (ret < 0) { - dev_err(dev, "failed to parse %s DT property\n", - prop_names[i]); - return -EINVAL; - } - state->gpio[i].gpio = ret; - state->gpio[i].level = !(of_flags & OF_GPIO_ACTIVE_LOW); - } - return 0; -} - static int s5c73m3_get_platform_data(struct s5c73m3 *state) { - struct device *dev = &state->i2c_client->dev; + struct i2c_client *c = state->i2c_client; + struct device *dev = &c->dev; const struct s5c73m3_platform_data *pdata = dev->platform_data; struct device_node *node = dev->of_node; struct device_node *node_ep; @@ -1608,8 +1539,6 @@ static int s5c73m3_get_platform_data(struct s5c73m3 *state) } state->mclk_frequency = pdata->mclk_frequency; - state->gpio[STBY] = pdata->gpio_stby; - state->gpio[RSET] = pdata->gpio_reset; return 0; } @@ -1624,9 +1553,17 @@ static int s5c73m3_get_platform_data(struct s5c73m3 *state) state->mclk_frequency); } - ret = s5c73m3_parse_gpios(state); - if (ret < 0) - return -EINVAL; + /* Request GPIO lines asserted */ + state->stby = devm_gpiod_get(dev, "standby", GPIOD_OUT_HIGH); + if (IS_ERR(state->stby)) + return dev_err_probe(dev, PTR_ERR(state->stby), + "failed to request gpio S5C73M3_STBY\n"); + gpiod_set_consumer_name(state->stby, "S5C73M3_STBY"); + state->reset = devm_gpiod_get(dev, "xshutdown", GPIOD_OUT_HIGH); + if (IS_ERR(state->reset)) + return dev_err_probe(dev, PTR_ERR(state->reset), + "failed to request gpio S5C73M3_RST\n"); + gpiod_set_consumer_name(state->reset, "S5C73M3_RST"); node_ep = of_graph_get_next_endpoint(node, NULL); if (!node_ep) { @@ -1708,10 +1645,6 @@ static int s5c73m3_probe(struct i2c_client *client) if (ret < 0) return ret; - ret = s5c73m3_configure_gpios(state); - if (ret) - goto out_err; - for (i = 0; i < S5C73M3_MAX_SUPPLIES; i++) state->supplies[i].supply = s5c73m3_supply_names[i]; diff --git a/drivers/media/i2c/s5c73m3/s5c73m3-ctrls.c b/drivers/media/i2c/s5c73m3/s5c73m3-ctrls.c index 141ad0b..e3543ae 100644 --- a/drivers/media/i2c/s5c73m3/s5c73m3-ctrls.c +++ b/drivers/media/i2c/s5c73m3/s5c73m3-ctrls.c @@ -10,7 +10,6 @@ #include #include #include -#include #include #include #include diff --git a/drivers/media/i2c/s5c73m3/s5c73m3.h b/drivers/media/i2c/s5c73m3/s5c73m3.h index c3fcfdd..1fc7df4 100644 --- a/drivers/media/i2c/s5c73m3/s5c73m3.h +++ b/drivers/media/i2c/s5c73m3/s5c73m3.h @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -351,12 +352,6 @@ struct s5c73m3_ctrls { struct v4l2_ctrl *scene_mode; }; -enum s5c73m3_gpio_id { - STBY, - RSET, - GPIO_NUM, -}; - enum s5c73m3_resolution_types { RES_ISP, RES_JPEG, @@ -383,7 +378,8 @@ struct s5c73m3 { u32 i2c_read_address; struct regulator_bulk_data supplies[S5C73M3_MAX_SUPPLIES]; - struct s5c73m3_gpio gpio[GPIO_NUM]; + struct gpio_desc *stby; + struct gpio_desc *reset; struct clk *clock; diff --git a/include/media/i2c/s5c73m3.h b/include/media/i2c/s5c73m3.h index a51f102..df0769d 100644 --- a/include/media/i2c/s5c73m3.h +++ b/include/media/i2c/s5c73m3.h @@ -21,20 +21,8 @@ #include /** - * struct s5c73m3_gpio - data structure describing a GPIO - * @gpio: GPIO number - * @level: indicates active state of the @gpio - */ -struct s5c73m3_gpio { - int gpio; - int level; -}; - -/** * struct s5c73m3_platform_data - s5c73m3 driver platform data * @mclk_frequency: sensor's master clock frequency in Hz - * @gpio_reset: GPIO driving RESET pin - * @gpio_stby: GPIO driving STBY pin * @bus_type: bus type * @nlanes: maximum number of MIPI-CSI lanes used * @horiz_flip: default horizontal image flip value, non zero to enable @@ -44,9 +32,6 @@ struct s5c73m3_gpio { struct s5c73m3_platform_data { unsigned long mclk_frequency; - struct s5c73m3_gpio gpio_reset; - struct s5c73m3_gpio gpio_stby; - enum v4l2_mbus_type bus_type; u8 nlanes; u8 horiz_flip; -- 2.7.4