diff options
author | Ezequiel Garcia <ezequiel@collabora.com> | 2019-08-15 13:48:03 -0300 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-08-26 10:50:48 -0300 |
commit | 02283b98b1ac47659b17d575ea24e2b92ead7ede (patch) | |
tree | f8a7a2128a3ba83f66bd442cafc1ec2ca0c74c0b /drivers/media/v4l2-core/v4l2-common.c | |
parent | 7c795df5f344482c2ab8c52ebc1d94302d2b9082 (diff) | |
download | linux-02283b98b1ac47659b17d575ea24e2b92ead7ede.tar.bz2 |
media: v4l2-core: move i2c helpers out of v4l2-common.c
Separate the i2c helpers to v4l2-i2c.c, in order to get rid
of the ifdefery. No functional changes intended, this is
just a cosmetic change to organize the code better.
Given I2C is a tristate symbol, a hidden boolean symbol
is introduced, to make the conditional build easier.
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers/media/v4l2-core/v4l2-common.c')
-rw-r--r-- | drivers/media/v4l2-core/v4l2-common.c | 145 |
1 files changed, 0 insertions, 145 deletions
diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c index 8ffa758d9342..62f7aa92ac29 100644 --- a/drivers/media/v4l2-core/v4l2-common.c +++ b/drivers/media/v4l2-core/v4l2-common.c @@ -40,7 +40,6 @@ #include <linux/mm.h> #include <linux/string.h> #include <linux/errno.h> -#include <linux/i2c.h> #include <linux/uaccess.h> #include <asm/pgtable.h> #include <asm/io.h> @@ -88,150 +87,6 @@ int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 _min, s32 _max, s32 _ } EXPORT_SYMBOL(v4l2_ctrl_query_fill); -/* I2C Helper functions */ - -#if IS_ENABLED(CONFIG_I2C) - -void v4l2_i2c_subdev_set_name(struct v4l2_subdev *sd, struct i2c_client *client, - const char *devname, const char *postfix) -{ - if (!devname) - devname = client->dev.driver->name; - if (!postfix) - postfix = ""; - - snprintf(sd->name, sizeof(sd->name), "%s%s %d-%04x", devname, postfix, - i2c_adapter_id(client->adapter), client->addr); -} -EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_set_name); - -void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client, - const struct v4l2_subdev_ops *ops) -{ - v4l2_subdev_init(sd, ops); - sd->flags |= V4L2_SUBDEV_FL_IS_I2C; - /* the owner is the same as the i2c_client's driver owner */ - sd->owner = client->dev.driver->owner; - sd->dev = &client->dev; - /* i2c_client and v4l2_subdev point to one another */ - v4l2_set_subdevdata(sd, client); - i2c_set_clientdata(client, sd); - v4l2_i2c_subdev_set_name(sd, client, NULL, NULL); -} -EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_init); - -/* Load an i2c sub-device. */ -struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev, - struct i2c_adapter *adapter, struct i2c_board_info *info, - const unsigned short *probe_addrs) -{ - struct v4l2_subdev *sd = NULL; - struct i2c_client *client; - - BUG_ON(!v4l2_dev); - - request_module(I2C_MODULE_PREFIX "%s", info->type); - - /* Create the i2c client */ - if (info->addr == 0 && probe_addrs) - client = i2c_new_probed_device(adapter, info, probe_addrs, - NULL); - else - client = i2c_new_device(adapter, info); - - /* Note: by loading the module first we are certain that c->driver - will be set if the driver was found. If the module was not loaded - first, then the i2c core tries to delay-load the module for us, - and then c->driver is still NULL until the module is finally - loaded. This delay-load mechanism doesn't work if other drivers - want to use the i2c device, so explicitly loading the module - is the best alternative. */ - if (client == NULL || client->dev.driver == NULL) - goto error; - - /* Lock the module so we can safely get the v4l2_subdev pointer */ - if (!try_module_get(client->dev.driver->owner)) - goto error; - sd = i2c_get_clientdata(client); - - /* Register with the v4l2_device which increases the module's - use count as well. */ - if (v4l2_device_register_subdev(v4l2_dev, sd)) - sd = NULL; - /* Decrease the module use count to match the first try_module_get. */ - module_put(client->dev.driver->owner); - -error: - /* If we have a client but no subdev, then something went wrong and - we must unregister the client. */ - if (client && sd == NULL) - i2c_unregister_device(client); - return sd; -} -EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev_board); - -struct v4l2_subdev *v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev, - struct i2c_adapter *adapter, const char *client_type, - u8 addr, const unsigned short *probe_addrs) -{ - struct i2c_board_info info; - - /* Setup the i2c board info with the device type and - the device address. */ - memset(&info, 0, sizeof(info)); - strscpy(info.type, client_type, sizeof(info.type)); - info.addr = addr; - - return v4l2_i2c_new_subdev_board(v4l2_dev, adapter, &info, probe_addrs); -} -EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev); - -/* Return i2c client address of v4l2_subdev. */ -unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd) -{ - struct i2c_client *client = v4l2_get_subdevdata(sd); - - return client ? client->addr : I2C_CLIENT_END; -} -EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_addr); - -/* Return a list of I2C tuner addresses to probe. Use only if the tuner - addresses are unknown. */ -const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type) -{ - static const unsigned short radio_addrs[] = { -#if IS_ENABLED(CONFIG_MEDIA_TUNER_TEA5761) - 0x10, -#endif - 0x60, - I2C_CLIENT_END - }; - static const unsigned short demod_addrs[] = { - 0x42, 0x43, 0x4a, 0x4b, - I2C_CLIENT_END - }; - static const unsigned short tv_addrs[] = { - 0x42, 0x43, 0x4a, 0x4b, /* tda8290 */ - 0x60, 0x61, 0x62, 0x63, 0x64, - I2C_CLIENT_END - }; - - switch (type) { - case ADDRS_RADIO: - return radio_addrs; - case ADDRS_DEMOD: - return demod_addrs; - case ADDRS_TV: - return tv_addrs; - case ADDRS_TV_WITH_DEMOD: - return tv_addrs + 4; - } - return NULL; -} -EXPORT_SYMBOL_GPL(v4l2_i2c_tuner_addrs); - -#endif /* defined(CONFIG_I2C) */ - /* Clamp x to be between min and max, aligned to a multiple of 2^align. min * and max don't have to be aligned, but there must be at least one valid * value. E.g., min=17,max=31,align=4 is not allowed as there are no multiples |