diff options
Diffstat (limited to 'drivers/extcon')
| -rw-r--r-- | drivers/extcon/extcon-ptn5150.c | 92 |
1 files changed, 49 insertions, 43 deletions
diff --git a/drivers/extcon/extcon-ptn5150.c b/drivers/extcon/extcon-ptn5150.c index a57fef384a29..342973726565 100644 --- a/drivers/extcon/extcon-ptn5150.c +++ b/drivers/extcon/extcon-ptn5150.c @@ -5,6 +5,7 @@ // Based on extcon-sm5502.c driver // Copyright (c) 2018-2019 by Vijai Kumar K // Author: Vijai Kumar K <vijaikumar.kanagarajan@gmail.com> +// Copyright (c) 2020 Krzysztof Kozlowski <krzk@kernel.org> #include <linux/err.h> #include <linux/i2c.h> @@ -83,12 +84,49 @@ static const struct regmap_config ptn5150_regmap_config = { .max_register = PTN5150_REG_END, }; +static void ptn5150_check_state(struct ptn5150_info *info) +{ + unsigned int port_status, reg_data, vbus; + int ret; + + ret = regmap_read(info->regmap, PTN5150_REG_CC_STATUS, ®_data); + if (ret) { + dev_err(info->dev, "failed to read CC STATUS %d\n", ret); + return; + } + + port_status = ((reg_data & + PTN5150_REG_CC_PORT_ATTACHMENT_MASK) >> + PTN5150_REG_CC_PORT_ATTACHMENT_SHIFT); + + switch (port_status) { + case PTN5150_DFP_ATTACHED: + extcon_set_state_sync(info->edev, EXTCON_USB_HOST, false); + gpiod_set_value_cansleep(info->vbus_gpiod, 0); + extcon_set_state_sync(info->edev, EXTCON_USB, true); + break; + case PTN5150_UFP_ATTACHED: + extcon_set_state_sync(info->edev, EXTCON_USB, false); + vbus = ((reg_data & PTN5150_REG_CC_VBUS_DETECTION_MASK) >> + PTN5150_REG_CC_VBUS_DETECTION_SHIFT); + if (vbus) + gpiod_set_value_cansleep(info->vbus_gpiod, 0); + else + gpiod_set_value_cansleep(info->vbus_gpiod, 1); + + extcon_set_state_sync(info->edev, EXTCON_USB_HOST, true); + break; + default: + dev_err(info->dev, "Unknown Port status : %x\n", port_status); + break; + } +} + static void ptn5150_irq_work(struct work_struct *work) { struct ptn5150_info *info = container_of(work, struct ptn5150_info, irq_work); int ret = 0; - unsigned int reg_data; unsigned int int_status; if (!info->edev) @@ -96,13 +134,6 @@ static void ptn5150_irq_work(struct work_struct *work) mutex_lock(&info->mutex); - ret = regmap_read(info->regmap, PTN5150_REG_CC_STATUS, ®_data); - if (ret) { - dev_err(info->dev, "failed to read CC STATUS %d\n", ret); - mutex_unlock(&info->mutex); - return; - } - /* Clear interrupt. Read would clear the register */ ret = regmap_read(info->regmap, PTN5150_REG_INT_STATUS, &int_status); if (ret) { @@ -116,41 +147,7 @@ static void ptn5150_irq_work(struct work_struct *work) cable_attach = int_status & PTN5150_REG_INT_CABLE_ATTACH_MASK; if (cable_attach) { - unsigned int port_status; - unsigned int vbus; - - port_status = ((reg_data & - PTN5150_REG_CC_PORT_ATTACHMENT_MASK) >> - PTN5150_REG_CC_PORT_ATTACHMENT_SHIFT); - - switch (port_status) { - case PTN5150_DFP_ATTACHED: - extcon_set_state_sync(info->edev, - EXTCON_USB_HOST, false); - gpiod_set_value_cansleep(info->vbus_gpiod, 0); - extcon_set_state_sync(info->edev, EXTCON_USB, - true); - break; - case PTN5150_UFP_ATTACHED: - extcon_set_state_sync(info->edev, EXTCON_USB, - false); - vbus = ((reg_data & - PTN5150_REG_CC_VBUS_DETECTION_MASK) >> - PTN5150_REG_CC_VBUS_DETECTION_SHIFT); - if (vbus) - gpiod_set_value_cansleep(info->vbus_gpiod, 0); - else - gpiod_set_value_cansleep(info->vbus_gpiod, 1); - - extcon_set_state_sync(info->edev, - EXTCON_USB_HOST, true); - break; - default: - dev_err(info->dev, - "Unknown Port status : %x\n", - port_status); - break; - } + ptn5150_check_state(info); } else { extcon_set_state_sync(info->edev, EXTCON_USB_HOST, false); @@ -302,6 +299,14 @@ static int ptn5150_i2c_probe(struct i2c_client *i2c, if (ret) return -EINVAL; + /* + * Update current extcon state if for example OTG connection was there + * before the probe + */ + mutex_lock(&info->mutex); + ptn5150_check_state(info); + mutex_unlock(&info->mutex); + return 0; } @@ -334,4 +339,5 @@ subsys_initcall(ptn5150_i2c_init); MODULE_DESCRIPTION("NXP PTN5150 CC logic Extcon driver"); MODULE_AUTHOR("Vijai Kumar K <vijaikumar.kanagarajan@gmail.com>"); +MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>"); MODULE_LICENSE("GPL v2"); |