From 4163851f7b997e24602cad8e0eae96d31a252548 Mon Sep 17 00:00:00 2001 From: Sylwester Nawrocki Date: Fri, 8 Mar 2013 10:41:47 -0300 Subject: [PATCH] [media] s5p-fimc: Use pinctrl API for camera ports configuration Before the camera ports can be used the pinmux needs to be configured properly. This patch adds a function to set the camera ports pinctrl to a default state within the media driver's probe(). The camera port(s) are then configured for the video bus operation. Signed-off-by: Sylwester Nawrocki Signed-off-by: Kyungmin Park Signed-off-by: Mauro Carvalho Chehab --- .../bindings/media/samsung-fimc.txt | 12 +++++++++ .../media/platform/s5p-fimc/fimc-mdevice.c | 26 +++++++++++++++++++ .../media/platform/s5p-fimc/fimc-mdevice.h | 11 ++++++++ 3 files changed, 49 insertions(+) diff --git a/Documentation/devicetree/bindings/media/samsung-fimc.txt b/Documentation/devicetree/bindings/media/samsung-fimc.txt index bcb0de7462a2..2a63ddd23d16 100644 --- a/Documentation/devicetree/bindings/media/samsung-fimc.txt +++ b/Documentation/devicetree/bindings/media/samsung-fimc.txt @@ -21,6 +21,15 @@ Required properties: - clock-names : must contain "fimc", "sclk_fimc" entries, matching entries in the clocks property. +The pinctrl bindings defined in ../pinctrl/pinctrl-bindings.txt must be used +to define a required pinctrl state named "default" and optional pinctrl states: +"idle", "active-a", active-b". These optional states can be used to switch the +camera port pinmux at runtime. The "idle" state should configure both the camera +ports A and B into high impedance state, especially the CAMCLK clock output +should be inactive. For the "active-a" state the camera port A must be activated +and the port B deactivated and for the state "active-b" it should be the other +way around. + The 'camera' node must include at least one 'fimc' child node. @@ -146,6 +155,9 @@ Example: #size-cells = <1>; status = "okay"; + pinctrl-names = "default"; + pinctrl-0 = <&cam_port_a_clk_active>; + /* parallel camera ports */ parallel-ports { /* camera A input */ diff --git a/drivers/media/platform/s5p-fimc/fimc-mdevice.c b/drivers/media/platform/s5p-fimc/fimc-mdevice.c index bfa02abd94c8..5e96775fca8d 100644 --- a/drivers/media/platform/s5p-fimc/fimc-mdevice.c +++ b/drivers/media/platform/s5p-fimc/fimc-mdevice.c @@ -1174,6 +1174,25 @@ static ssize_t fimc_md_sysfs_store(struct device *dev, static DEVICE_ATTR(subdev_conf_mode, S_IWUSR | S_IRUGO, fimc_md_sysfs_show, fimc_md_sysfs_store); +static int fimc_md_get_pinctrl(struct fimc_md *fmd) +{ + struct device *dev = &fmd->pdev->dev; + struct fimc_pinctrl *pctl = &fmd->pinctl; + + pctl->pinctrl = devm_pinctrl_get(dev); + if (IS_ERR(pctl->pinctrl)) + return PTR_ERR(pctl->pinctrl); + + pctl->state_default = pinctrl_lookup_state(pctl->pinctrl, + PINCTRL_STATE_DEFAULT); + if (IS_ERR(pctl->state_default)) + return PTR_ERR(pctl->state_default); + + pctl->state_idle = pinctrl_lookup_state(pctl->pinctrl, + PINCTRL_STATE_IDLE); + return 0; +} + static int fimc_md_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -1217,6 +1236,13 @@ static int fimc_md_probe(struct platform_device *pdev) /* Protect the media graph while we're registering entities */ mutex_lock(&fmd->media_dev.graph_mutex); + ret = fimc_md_get_pinctrl(fmd); + if (ret < 0) { + if (ret != EPROBE_DEFER) + dev_err(dev, "Failed to get pinctrl: %d\n", ret); + goto err_unlock; + } + if (dev->of_node) ret = fimc_md_register_of_platform_entities(fmd, dev->of_node); else diff --git a/drivers/media/platform/s5p-fimc/fimc-mdevice.h b/drivers/media/platform/s5p-fimc/fimc-mdevice.h index b6ceb5984664..5d6146e76802 100644 --- a/drivers/media/platform/s5p-fimc/fimc-mdevice.h +++ b/drivers/media/platform/s5p-fimc/fimc-mdevice.h @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -26,6 +27,8 @@ #define FIMC_IS_OF_NODE_NAME "fimc-is" #define CSIS_OF_NODE_NAME "csis" +#define PINCTRL_STATE_IDLE "idle" + /* Group IDs of sensor, MIPI-CSIS, FIMC-LITE and the writeback subdevs. */ #define GRP_ID_SENSOR (1 << 8) #define GRP_ID_FIMC_IS_SENSOR (1 << 9) @@ -73,6 +76,9 @@ struct fimc_sensor_info { * @media_dev: top level media device * @v4l2_dev: top level v4l2_device holding up the subdevs * @pdev: platform device this media device is hooked up into + * @pinctrl: camera port pinctrl handle + * @state_default: pinctrl default state handle + * @state_idle: pinctrl idle state handle * @user_subdev_api: true if subdevs are not configured by the host driver * @slock: spinlock protecting @sensor array */ @@ -86,6 +92,11 @@ struct fimc_md { struct media_device media_dev; struct v4l2_device v4l2_dev; struct platform_device *pdev; + struct fimc_pinctrl { + struct pinctrl *pinctrl; + struct pinctrl_state *state_default; + struct pinctrl_state *state_idle; + } pinctl; bool user_subdev_api; spinlock_t slock; }; -- 2.20.1