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author | Mark Brown <broonie@linaro.org> | 2013-08-09 11:41:58 +0100 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-12 12:20:27 -0700 |
commit | 3f0d1c67fa20d524fdcb4a7dcda19ed76c59be44 (patch) | |
tree | f0d9cefc79b8c7033b39194332cfac68e4709358 /drivers/usb/misc/usb3503.c | |
parent | e5162d40b90e3e2e01aadcac9d4f151ecb9ee051 (diff) | |
download | linux-stable-3f0d1c67fa20d524fdcb4a7dcda19ed76c59be44.tar.gz linux-stable-3f0d1c67fa20d524fdcb4a7dcda19ed76c59be44.tar.bz2 linux-stable-3f0d1c67fa20d524fdcb4a7dcda19ed76c59be44.zip |
usb: misc: usb3503: Support operation with no I2C control
Refactor so that register writes for configuration are only performed if
the device has a regmap provided and also register as a platform driver.
This allows the driver to be used to manage GPIO based control of the
device.
Signed-off-by: Mark Brown <broonie@linaro.org>
Cc: devicetree@vger.kernel.org
Reviewed-by: Dongjin Kim <tobetter@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/misc/usb3503.c')
-rw-r--r-- | drivers/usb/misc/usb3503.c | 93 |
1 files changed, 76 insertions, 17 deletions
diff --git a/drivers/usb/misc/usb3503.c b/drivers/usb/misc/usb3503.c index da45ed971332..a31641e18d19 100644 --- a/drivers/usb/misc/usb3503.c +++ b/drivers/usb/misc/usb3503.c @@ -78,22 +78,21 @@ static int usb3503_reset(struct usb3503 *hub, int state) return 0; } -static int usb3503_switch_mode(struct usb3503 *hub, enum usb3503_mode mode) +static int usb3503_connect(struct usb3503 *hub) { struct device *dev = hub->dev; - int err = 0; + int err; - switch (mode) { - case USB3503_MODE_HUB: - usb3503_reset(hub, 1); + usb3503_reset(hub, 1); + if (hub->regmap) { /* SP_ILOCK: set connect_n, config_n for config */ err = regmap_write(hub->regmap, USB3503_SP_ILOCK, - (USB3503_SPILOCK_CONNECT + (USB3503_SPILOCK_CONNECT | USB3503_SPILOCK_CONFIG)); if (err < 0) { dev_err(dev, "SP_ILOCK failed (%d)\n", err); - goto err_hubmode; + return err; } /* PDS : Disable For Self Powered Operation */ @@ -103,7 +102,7 @@ static int usb3503_switch_mode(struct usb3503 *hub, enum usb3503_mode mode) hub->port_off_mask); if (err < 0) { dev_err(dev, "PDS failed (%d)\n", err); - goto err_hubmode; + return err; } } @@ -113,7 +112,7 @@ static int usb3503_switch_mode(struct usb3503 *hub, enum usb3503_mode mode) USB3503_SELF_BUS_PWR); if (err < 0) { dev_err(dev, "CFG1 failed (%d)\n", err); - goto err_hubmode; + return err; } /* SP_LOCK: clear connect_n, config_n for hub connect */ @@ -122,14 +121,27 @@ static int usb3503_switch_mode(struct usb3503 *hub, enum usb3503_mode mode) | USB3503_SPILOCK_CONFIG), 0); if (err < 0) { dev_err(dev, "SP_ILOCK failed (%d)\n", err); - goto err_hubmode; + return err; } + } - if (gpio_is_valid(hub->gpio_connect)) - gpio_set_value_cansleep(hub->gpio_connect, 1); + if (gpio_is_valid(hub->gpio_connect)) + gpio_set_value_cansleep(hub->gpio_connect, 1); - hub->mode = mode; - dev_info(dev, "switched to HUB mode\n"); + hub->mode = USB3503_MODE_HUB; + dev_info(dev, "switched to HUB mode\n"); + + return 0; +} + +static int usb3503_switch_mode(struct usb3503 *hub, enum usb3503_mode mode) +{ + struct device *dev = hub->dev; + int err = 0; + + switch (mode) { + case USB3503_MODE_HUB: + err = usb3503_connect(hub); break; case USB3503_MODE_STANDBY: @@ -145,7 +157,6 @@ static int usb3503_switch_mode(struct usb3503 *hub, enum usb3503_mode mode) break; } -err_hubmode: return err; } @@ -198,6 +209,9 @@ static int usb3503_probe(struct usb3503 *hub) hub->mode = mode; } + if (hub->port_off_mask && !hub->regmap) + dev_err(dev, "Ports disabled with no control interface\n"); + if (gpio_is_valid(hub->gpio_intn)) { err = devm_gpio_request_one(dev, hub->gpio_intn, GPIOF_OUT_INIT_HIGH, "usb3503 intn"); @@ -263,6 +277,20 @@ static int usb3503_i2c_probe(struct i2c_client *i2c, return usb3503_probe(hub); } +static int usb3503_platform_probe(struct platform_device *pdev) +{ + struct usb3503 *hub; + + hub = devm_kzalloc(&pdev->dev, sizeof(struct usb3503), GFP_KERNEL); + if (!hub) { + dev_err(&pdev->dev, "private data alloc fail\n"); + return -ENOMEM; + } + hub->dev = &pdev->dev; + + return usb3503_probe(hub); +} + static const struct i2c_device_id usb3503_id[] = { { USB3503_I2C_NAME, 0 }, { } @@ -278,7 +306,7 @@ static const struct of_device_id usb3503_of_match[] = { MODULE_DEVICE_TABLE(of, usb3503_of_match); #endif -static struct i2c_driver usb3503_driver = { +static struct i2c_driver usb3503_i2c_driver = { .driver = { .name = USB3503_I2C_NAME, .of_match_table = of_match_ptr(usb3503_of_match), @@ -287,7 +315,38 @@ static struct i2c_driver usb3503_driver = { .id_table = usb3503_id, }; -module_i2c_driver(usb3503_driver); +static struct platform_driver usb3503_platform_driver = { + .driver = { + .name = USB3503_I2C_NAME, + .of_match_table = of_match_ptr(usb3503_of_match), + .owner = THIS_MODULE, + }, + .probe = usb3503_platform_probe, +}; + +static int __init usb3503_init(void) +{ + int err; + + err = i2c_register_driver(THIS_MODULE, &usb3503_i2c_driver); + if (err != 0) + pr_err("usb3503: Failed to register I2C driver: %d\n", err); + + err = platform_driver_register(&usb3503_platform_driver); + if (err != 0) + pr_err("usb3503: Failed to register platform driver: %d\n", + err); + + return 0; +} +module_init(usb3503_init); + +static void __exit usb3503_exit(void) +{ + platform_driver_unregister(&usb3503_platform_driver); + i2c_del_driver(&usb3503_i2c_driver); +} +module_exit(usb3503_exit); MODULE_AUTHOR("Dongjin Kim <tobetter@gmail.com>"); MODULE_DESCRIPTION("USB3503 USB HUB driver"); |