Add a new driver for the ON Semiconductor LC824206XA microUSB switch and
accessory detector chip.
ON Semiconductor has an "Advance Information" datasheet available
(ENA2222-D.PDF), but no full datasheet. So there is no documentation
available for the registers.
This driver is based on the register info from the extcon-fsa9285.c driver,
from the Lollipop Android sources for the Lenovo Yoga Tablet 2 (Pro)
830 / 1050 / 1380 models. Note despite the name this is actually a driver
for the LC824206XA not the FSA9285.
This has only been tested on a Lenovo Yoga Tablet 2 Pro 1380 and
using the driver on other setups may require additional work.
So far this driver is only used on x86/ACPI (non devicetree) devs.
Therefor there is no devicetree bindings documentation for this driver's
"onnn,enable-miclr-for-dcp" property since this is not used in actual
devicetree files and the dt bindings maintainers have requested properties
with no actual dt users to _not_ be added to the dt bindings.
Signed-off-by: Hans de Goede <[email protected]>
---
drivers/extcon/Kconfig | 11 +
drivers/extcon/Makefile | 1 +
drivers/extcon/extcon-lc824206xa.c | 500 +++++++++++++++++++++++++++++
3 files changed, 512 insertions(+)
create mode 100644 drivers/extcon/extcon-lc824206xa.c
diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
index 5f869eacd19a..10212a585142 100644
--- a/drivers/extcon/Kconfig
+++ b/drivers/extcon/Kconfig
@@ -75,6 +75,17 @@ config EXTCON_INTEL_MRFLD
Say Y here to enable extcon support for charger detection / control
on the Intel Merrifield Basin Cove PMIC.
+config EXTCON_LC824206XA
+ tristate "LC824206XA extcon Support"
+ depends on I2C
+ depends on POWER_SUPPLY
+ help
+ Say Y here to enable support for the ON Semiconductor LC824206XA
+ microUSB switch and accessory detector chip. The LC824206XA is a USB
+ port accessory detector and switch. The LC824206XA is fully controlled
+ using I2C and enables USB data, stereo and mono audio, video,
+ microphone and UART data to use a common connector port.
+
config EXTCON_MAX14577
tristate "Maxim MAX14577/77836 EXTCON Support"
depends on MFD_MAX14577
diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile
index f779adb5e4c7..0d6d23faf748 100644
--- a/drivers/extcon/Makefile
+++ b/drivers/extcon/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_EXTCON_GPIO) += extcon-gpio.o
obj-$(CONFIG_EXTCON_INTEL_INT3496) += extcon-intel-int3496.o
obj-$(CONFIG_EXTCON_INTEL_CHT_WC) += extcon-intel-cht-wc.o
obj-$(CONFIG_EXTCON_INTEL_MRFLD) += extcon-intel-mrfld.o
+obj-$(CONFIG_EXTCON_LC824206XA) += extcon-lc824206xa.o
obj-$(CONFIG_EXTCON_MAX14577) += extcon-max14577.o
obj-$(CONFIG_EXTCON_MAX3355) += extcon-max3355.o
obj-$(CONFIG_EXTCON_MAX77693) += extcon-max77693.o
diff --git a/drivers/extcon/extcon-lc824206xa.c b/drivers/extcon/extcon-lc824206xa.c
new file mode 100644
index 000000000000..fdf4da50ff46
--- /dev/null
+++ b/drivers/extcon/extcon-lc824206xa.c
@@ -0,0 +1,500 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * ON Semiconductor LC824206XA Micro USB Switch driver
+ *
+ * Copyright (c) 2024 Hans de Goede <[email protected]>
+ *
+ * ON Semiconductor has an "Advance Information" datasheet available
+ * (ENA2222-D.PDF), but no full datasheet. So there is no documentation
+ * available for the registers.
+ *
+ * This driver is based on the register info from the extcon-fsa9285.c driver,
+ * from the Lollipop Android sources for the Lenovo Yoga Tablet 2 (Pro)
+ * 830 / 1050 / 1380 models. Note despite the name this is actually a driver
+ * for the LC824206XA not the FSA9285. The Android sources can be downloaded
+ * from Lenovo's support page for these tablets, filename:
+ * yoga_tab_2_osc_android_to_lollipop_201505.rar.
+ */
+
+#include <linux/bits.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/extcon-provider.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/power_supply.h>
+#include <linux/property.h>
+#include <linux/regulator/consumer.h>
+#include <linux/workqueue.h>
+
+/*
+ * Register defines as mentioned above there is no datasheet with register
+ * info, so this may not be 100% accurate.
+ */
+#define REG00 0x00
+#define REG00_INIT_VALUE 0x01
+
+#define REG_STATUS 0x01
+#define STATUS_OVP BIT(0)
+#define STATUS_DATA_SHORT BIT(1)
+#define STATUS_VBUS_PRESENT BIT(2)
+#define STATUS_USB_ID GENMASK(7, 3)
+#define STATUS_USB_ID_GND 0x80
+#define STATUS_USB_ID_ACA 0xf0
+#define STATUS_USB_ID_FLOAT 0xf8
+
+/*
+ * This controls the DP/DM muxes + other switches,
+ * meaning of individual bits is unknown.
+ */
+#define REG_SWITCH_CONTROL 0x02
+#define SWITCH_STEREO_MIC 0xc8
+#define SWITCH_USB_HOST 0xec
+#define SWITCH_DISCONNECTED 0xf8
+#define SWITCH_USB_DEVICE 0xfc
+
+/* 5 bits? ADC 0x10 GND, 0x1a-0x1f ACA, 0x1f float */
+#define REG_ID_PIN_ADC_VALUE 0x03
+
+/* Masks for all 3 interrupt registers */
+#define INTR_ID_PIN_CHANGE BIT(0)
+#define INTR_VBUS_CHANGE BIT(1)
+/* Both of these get set after a continuous mode ADC conversion */
+#define INTR_ID_PIN_ADC_INT1 BIT(2)
+#define INTR_ID_PIN_ADC_INT2 BIT(3)
+/* Charger type available in reg 0x09 */
+#define INTR_CHARGER_DET_DONE BIT(4)
+#define INTR_OVP BIT(5)
+
+/* There are 7 interrupt sources, bit 6 use is unknown (OCP?) */
+#define INTR_ALL GENMASK(6, 0)
+
+/* Unmask interrupts this driver cares about */
+#define INTR_MASK \
+ (INTR_ALL & ~(INTR_ID_PIN_CHANGE | INTR_VBUS_CHANGE | INTR_CHARGER_DET_DONE))
+
+/* Active (event happened and not cleared yet) interrupts */
+#define REG_INTR_STATUS 0x04
+
+/*
+ * Writing a 1 to a bit here clears it in INTR_STATUS. These bits do NOT
+ * auto-reset to 0, so these must be set to 0 manually after clearing.
+ */
+#define REG_INTR_CLEAR 0x05
+
+/* Interrupts which bit is set to 1 here will not raise the HW IRQ */
+#define REG_INTR_MASK 0x06
+
+/* ID pin ADC control, meaning of individual bits is unknown */
+#define REG_ID_PIN_ADC_CTRL 0x07
+#define ID_PIN_ADC_AUTO 0x40
+#define ID_PIN_ADC_CONTINUOUS 0x44
+
+#define REG_CHARGER_DET 0x08
+#define CHARGER_DET_ON BIT(0)
+#define CHARGER_DET_CDP_ON BIT(1)
+#define CHARGER_DET_CDP_VAL BIT(2)
+
+#define REG_CHARGER_TYPE 0x09
+#define CHARGER_TYPE_UNKNOWN 0x00
+#define CHARGER_TYPE_DCP 0x01
+#define CHARGER_TYPE_SDP_OR_CDP 0x04
+#define CHARGER_TYPE_QC 0x06
+
+#define REG10 0x10
+#define REG10_INIT_VALUE 0x00
+
+struct lc824206xa_data {
+ struct work_struct work;
+ struct i2c_client *client;
+ struct extcon_dev *edev;
+ struct power_supply *psy;
+ struct regulator *vbus_boost;
+ unsigned int usb_type;
+ unsigned int cable;
+ unsigned int previous_cable;
+ u8 switch_control;
+ u8 previous_switch_control;
+ bool vbus_ok;
+ bool vbus_boost_enabled;
+ bool fastcharge_over_miclr;
+};
+
+static const unsigned int lc824206xa_cables[] = {
+ EXTCON_USB_HOST,
+ EXTCON_CHG_USB_SDP,
+ EXTCON_CHG_USB_CDP,
+ EXTCON_CHG_USB_DCP,
+ EXTCON_CHG_USB_ACA,
+ EXTCON_CHG_USB_FAST,
+ EXTCON_NONE,
+};
+
+/* read/write reg helpers to add error logging to smbus byte functions */
+static int lc824206xa_read_reg(struct lc824206xa_data *data, u8 reg)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, reg);
+ if (ret < 0)
+ dev_err(&data->client->dev, "Error %d reading reg 0x%02x\n", ret, reg);
+
+ return ret;
+}
+
+static int lc824206xa_write_reg(struct lc824206xa_data *data, u8 reg, u8 val)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, reg, val);
+ if (ret < 0)
+ dev_err(&data->client->dev, "Error %d writing reg 0x%02x\n", ret, reg);
+
+ return ret;
+}
+
+static int lc824206xa_get_id(struct lc824206xa_data *data)
+{
+ int ret;
+
+ ret = lc824206xa_write_reg(data, REG_ID_PIN_ADC_CTRL, ID_PIN_ADC_CONTINUOUS);
+ if (ret)
+ return ret;
+
+ ret = lc824206xa_read_reg(data, REG_ID_PIN_ADC_VALUE);
+
+ lc824206xa_write_reg(data, REG_ID_PIN_ADC_CTRL, ID_PIN_ADC_AUTO);
+
+ return ret;
+}
+
+static void lc824206xa_set_vbus_boost(struct lc824206xa_data *data, bool enable)
+{
+ int ret;
+
+ if (data->vbus_boost_enabled == enable)
+ return;
+
+ if (enable)
+ ret = regulator_enable(data->vbus_boost);
+ else
+ ret = regulator_disable(data->vbus_boost);
+
+ if (ret == 0)
+ data->vbus_boost_enabled = enable;
+ else
+ dev_err(&data->client->dev, "Error updating Vbus boost regulator: %d\n", ret);
+}
+
+static void lc824206xa_charger_detect(struct lc824206xa_data *data)
+{
+ int charger_type, ret;
+
+ charger_type = lc824206xa_read_reg(data, REG_CHARGER_TYPE);
+ if (charger_type < 0)
+ return;
+
+ dev_dbg(&data->client->dev, "charger type 0x%02x\n", charger_type);
+
+ switch (charger_type) {
+ case CHARGER_TYPE_UNKNOWN:
+ data->usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
+ /* Treat as SDP */
+ data->cable = EXTCON_CHG_USB_SDP;
+ data->switch_control = SWITCH_USB_DEVICE;
+ break;
+ case CHARGER_TYPE_SDP_OR_CDP:
+ data->usb_type = POWER_SUPPLY_USB_TYPE_SDP;
+ data->cable = EXTCON_CHG_USB_SDP;
+ data->switch_control = SWITCH_USB_DEVICE;
+
+ ret = lc824206xa_write_reg(data, REG_CHARGER_DET,
+ CHARGER_DET_CDP_ON | CHARGER_DET_ON);
+ if (ret < 0)
+ break;
+
+ msleep(100);
+ ret = lc824206xa_read_reg(data, REG_CHARGER_DET);
+ if (ret >= 0 && (ret & CHARGER_DET_CDP_VAL)) {
+ data->usb_type = POWER_SUPPLY_USB_TYPE_CDP;
+ data->cable = EXTCON_CHG_USB_CDP;
+ }
+
+ lc824206xa_write_reg(data, REG_CHARGER_DET, CHARGER_DET_ON);
+ break;
+ case CHARGER_TYPE_DCP:
+ data->usb_type = POWER_SUPPLY_USB_TYPE_DCP;
+ data->cable = EXTCON_CHG_USB_DCP;
+ if (data->fastcharge_over_miclr)
+ data->switch_control = SWITCH_STEREO_MIC;
+ else
+ data->switch_control = SWITCH_DISCONNECTED;
+ break;
+ case CHARGER_TYPE_QC:
+ data->usb_type = POWER_SUPPLY_USB_TYPE_DCP;
+ data->cable = EXTCON_CHG_USB_DCP;
+ data->switch_control = SWITCH_DISCONNECTED;
+ break;
+ default:
+ dev_warn(&data->client->dev, "Unknown charger type: 0x%02x\n", charger_type);
+ break;
+ }
+}
+
+static void lc824206xa_work(struct work_struct *work)
+{
+ struct lc824206xa_data *data = container_of(work, struct lc824206xa_data, work);
+ bool vbus_boost_enable = false;
+ int status, id;
+
+ status = lc824206xa_read_reg(data, REG_STATUS);
+ if (status < 0)
+ return;
+
+ dev_dbg(&data->client->dev, "status 0x%02x\n", status);
+
+ data->vbus_ok = (status & (STATUS_VBUS_PRESENT | STATUS_OVP)) == STATUS_VBUS_PRESENT;
+
+ /* Read id pin ADC if necessary */
+ switch (status & STATUS_USB_ID) {
+ case STATUS_USB_ID_GND:
+ case STATUS_USB_ID_FLOAT:
+ break;
+ default:
+ /* Happens when the connector is inserted slowly, log at dbg level */
+ dev_dbg(&data->client->dev, "Unknown status 0x%02x\n", status);
+ fallthrough;
+ case STATUS_USB_ID_ACA:
+ id = lc824206xa_get_id(data);
+ dev_dbg(&data->client->dev, "RID 0x%02x\n", id);
+ switch (id) {
+ case 0x10:
+ status = STATUS_USB_ID_GND;
+ break;
+ case 0x18 ... 0x1e:
+ status = STATUS_USB_ID_ACA;
+ break;
+ case 0x1f:
+ status = STATUS_USB_ID_FLOAT;
+ break;
+ default:
+ dev_warn(&data->client->dev, "Unknown RID 0x%02x\n", id);
+ return;
+ }
+ }
+
+ /* Check for out of spec OTG charging hubs, treat as ACA */
+ if ((status & STATUS_USB_ID) == STATUS_USB_ID_GND &&
+ data->vbus_ok && !data->vbus_boost_enabled) {
+ dev_info(&data->client->dev, "Out of spec USB host adapter with Vbus present, not enabling 5V output\n");
+ status = STATUS_USB_ID_ACA;
+ }
+
+ switch (status & STATUS_USB_ID) {
+ case STATUS_USB_ID_ACA:
+ data->usb_type = POWER_SUPPLY_USB_TYPE_ACA;
+ data->cable = EXTCON_CHG_USB_ACA;
+ data->switch_control = SWITCH_USB_HOST;
+ break;
+ case STATUS_USB_ID_GND:
+ data->usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
+ data->cable = EXTCON_USB_HOST;
+ data->switch_control = SWITCH_USB_HOST;
+ vbus_boost_enable = true;
+ break;
+ case STATUS_USB_ID_FLOAT:
+ /* When fast charging with Vbus > 5V, OVP will be set */
+ if (data->fastcharge_over_miclr &&
+ data->switch_control == SWITCH_STEREO_MIC &&
+ (status & STATUS_OVP)) {
+ data->cable = EXTCON_CHG_USB_FAST;
+ break;
+ }
+
+ if (data->vbus_ok) {
+ lc824206xa_charger_detect(data);
+ } else {
+ data->usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
+ data->cable = EXTCON_NONE;
+ data->switch_control = SWITCH_DISCONNECTED;
+ }
+ break;
+ }
+
+ lc824206xa_set_vbus_boost(data, vbus_boost_enable);
+
+ if (data->switch_control != data->previous_switch_control) {
+ lc824206xa_write_reg(data, REG_SWITCH_CONTROL, data->switch_control);
+ data->previous_switch_control = data->switch_control;
+ }
+
+ if (data->cable != data->previous_cable) {
+ extcon_set_state_sync(data->edev, data->previous_cable, false);
+ extcon_set_state_sync(data->edev, data->cable, true);
+ data->previous_cable = data->cable;
+ }
+
+ power_supply_changed(data->psy);
+}
+
+static irqreturn_t lc824206xa_irq(int irq, void *_data)
+{
+ struct lc824206xa_data *data = _data;
+ int intr_status;
+
+ intr_status = lc824206xa_read_reg(data, REG_INTR_STATUS);
+ if (intr_status < 0)
+ intr_status = INTR_ALL; /* Should never happen, clear all */
+
+ dev_dbg(&data->client->dev, "interrupt 0x%02x\n", intr_status);
+
+ lc824206xa_write_reg(data, REG_INTR_CLEAR, intr_status);
+ lc824206xa_write_reg(data, REG_INTR_CLEAR, 0);
+
+ schedule_work(&data->work);
+ return IRQ_HANDLED;
+}
+
+/*
+ * Newer charger (power_supply) drivers expect the max input current to be
+ * provided by a parent power_supply device for the charger chip.
+ */
+static int lc824206xa_psy_get_prop(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct lc824206xa_data *data = power_supply_get_drvdata(psy);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ val->intval = data->vbus_ok && !data->vbus_boost_enabled;
+ break;
+ case POWER_SUPPLY_PROP_USB_TYPE:
+ val->intval = data->usb_type;
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_MAX:
+ switch (data->usb_type) {
+ case POWER_SUPPLY_USB_TYPE_DCP:
+ case POWER_SUPPLY_USB_TYPE_ACA:
+ val->intval = 2000000;
+ break;
+ case POWER_SUPPLY_USB_TYPE_CDP:
+ val->intval = 1500000;
+ break;
+ default:
+ val->intval = 500000;
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const enum power_supply_usb_type lc824206xa_psy_usb_types[] = {
+ POWER_SUPPLY_USB_TYPE_SDP,
+ POWER_SUPPLY_USB_TYPE_CDP,
+ POWER_SUPPLY_USB_TYPE_DCP,
+ POWER_SUPPLY_USB_TYPE_ACA,
+ POWER_SUPPLY_USB_TYPE_UNKNOWN,
+};
+
+static const enum power_supply_property lc824206xa_psy_props[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_USB_TYPE,
+ POWER_SUPPLY_PROP_CURRENT_MAX,
+};
+
+static const struct power_supply_desc lc824206xa_psy_desc = {
+ .name = "lc824206xa-charger-detect",
+ .type = POWER_SUPPLY_TYPE_USB,
+ .usb_types = lc824206xa_psy_usb_types,
+ .num_usb_types = ARRAY_SIZE(lc824206xa_psy_usb_types),
+ .properties = lc824206xa_psy_props,
+ .num_properties = ARRAY_SIZE(lc824206xa_psy_props),
+ .get_property = lc824206xa_psy_get_prop,
+};
+
+static int lc824206xa_probe(struct i2c_client *client)
+{
+ struct power_supply_config psy_cfg = { };
+ struct device *dev = &client->dev;
+ struct lc824206xa_data *data;
+ int ret;
+
+ data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->client = client;
+ INIT_WORK(&data->work, lc824206xa_work);
+ data->cable = EXTCON_NONE;
+ data->previous_cable = EXTCON_NONE;
+ data->usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
+ /* Some designs use a custom fast-charge protocol over the mic L/R inputs */
+ data->fastcharge_over_miclr =
+ device_property_read_bool(dev, "onnn,enable-miclr-for-dcp");
+
+ data->vbus_boost = devm_regulator_get(dev, "vbus");
+ if (IS_ERR(data->vbus_boost))
+ return dev_err_probe(dev, PTR_ERR(data->vbus_boost),
+ "getting regulator\n");
+
+ /* Init */
+ ret = lc824206xa_write_reg(data, REG00, REG00_INIT_VALUE);
+ ret |= lc824206xa_write_reg(data, REG10, REG10_INIT_VALUE);
+ msleep(100);
+ ret |= lc824206xa_write_reg(data, REG_INTR_CLEAR, INTR_ALL);
+ ret |= lc824206xa_write_reg(data, REG_INTR_CLEAR, 0);
+ ret |= lc824206xa_write_reg(data, REG_INTR_MASK, INTR_MASK);
+ ret |= lc824206xa_write_reg(data, REG_ID_PIN_ADC_CTRL, ID_PIN_ADC_AUTO);
+ ret |= lc824206xa_write_reg(data, REG_CHARGER_DET, CHARGER_DET_ON);
+ if (ret)
+ return -EIO;
+
+ /* Initialize extcon device */
+ data->edev = devm_extcon_dev_allocate(dev, lc824206xa_cables);
+ if (IS_ERR(data->edev))
+ return PTR_ERR(data->edev);
+
+ ret = devm_extcon_dev_register(dev, data->edev);
+ if (ret)
+ return dev_err_probe(dev, ret, "registering extcon device\n");
+
+ psy_cfg.drv_data = data;
+ data->psy = devm_power_supply_register(dev, &lc824206xa_psy_desc, &psy_cfg);
+ if (IS_ERR(data->psy))
+ return dev_err_probe(dev, PTR_ERR(data->psy), "registering power supply\n");
+
+ ret = devm_request_threaded_irq(dev, client->irq, NULL, lc824206xa_irq,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ KBUILD_MODNAME, data);
+ if (ret)
+ return dev_err_probe(dev, ret, "requesting IRQ\n");
+
+ /* Sync initial state */
+ schedule_work(&data->work);
+ return 0;
+}
+
+static const struct i2c_device_id lc824206xa_i2c_ids[] = {
+ { "lc824206xa" },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lc824206xa_i2c_ids);
+
+static struct i2c_driver lc824206xa_driver = {
+ .driver = {
+ .name = KBUILD_MODNAME,
+ },
+ .probe = lc824206xa_probe,
+ .id_table = lc824206xa_i2c_ids,
+};
+
+module_i2c_driver(lc824206xa_driver);
+
+MODULE_AUTHOR("Hans de Goede <[email protected]>");
+MODULE_DESCRIPTION("LC824206XA Micro USB Switch driver");
+MODULE_LICENSE("GPL");
--
2.44.0
On Sat, Apr 6, 2024 at 11:07 PM Hans de Goede <[email protected]> wrote:
>
> Add a new driver for the ON Semiconductor LC824206XA microUSB switch and
> accessory detector chip.
>
> ON Semiconductor has an "Advance Information" datasheet available
> (ENA2222-D.PDF), but no full datasheet. So there is no documentation
> available for the registers.
>
> This driver is based on the register info from the extcon-fsa9285.c driver,
> from the Lollipop Android sources for the Lenovo Yoga Tablet 2 (Pro)
> 830 / 1050 / 1380 models. Note despite the name this is actually a driver
> for the LC824206XA not the FSA9285.
>
> This has only been tested on a Lenovo Yoga Tablet 2 Pro 1380 and
> using the driver on other setups may require additional work.
>
> So far this driver is only used on x86/ACPI (non devicetree) devs.
> Therefor there is no devicetree bindings documentation for this driver's
> "onnn,enable-miclr-for-dcp" property since this is not used in actual
> devicetree files and the dt bindings maintainers have requested properties
> with no actual dt users to _not_ be added to the dt bindings.
>
> Signed-off-by: Hans de Goede <[email protected]>
> ---
> drivers/extcon/Kconfig | 11 +
> drivers/extcon/Makefile | 1 +
> drivers/extcon/extcon-lc824206xa.c | 500 +++++++++++++++++++++++++++++
> 3 files changed, 512 insertions(+)
> create mode 100644 drivers/extcon/extcon-lc824206xa.c
>
> diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
> index 5f869eacd19a..10212a585142 100644
> --- a/drivers/extcon/Kconfig
> +++ b/drivers/extcon/Kconfig
> @@ -75,6 +75,17 @@ config EXTCON_INTEL_MRFLD
> Say Y here to enable extcon support for charger detection / control
> on the Intel Merrifield Basin Cove PMIC.
>
> +config EXTCON_LC824206XA
> + tristate "LC824206XA extcon Support"
> + depends on I2C
> + depends on POWER_SUPPLY
> + help
> + Say Y here to enable support for the ON Semiconductor LC824206XA
> + microUSB switch and accessory detector chip. The LC824206XA is a USB
> + port accessory detector and switch. The LC824206XA is fully controlled
> + using I2C and enables USB data, stereo and mono audio, video,
> + microphone and UART data to use a common connector port.
> +
> config EXTCON_MAX14577
> tristate "Maxim MAX14577/77836 EXTCON Support"
> depends on MFD_MAX14577
> diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile
> index f779adb5e4c7..0d6d23faf748 100644
> --- a/drivers/extcon/Makefile
> +++ b/drivers/extcon/Makefile
> @@ -12,6 +12,7 @@ obj-$(CONFIG_EXTCON_GPIO) += extcon-gpio.o
> obj-$(CONFIG_EXTCON_INTEL_INT3496) += extcon-intel-int3496.o
> obj-$(CONFIG_EXTCON_INTEL_CHT_WC) += extcon-intel-cht-wc.o
> obj-$(CONFIG_EXTCON_INTEL_MRFLD) += extcon-intel-mrfld.o
> +obj-$(CONFIG_EXTCON_LC824206XA) += extcon-lc824206xa.o
> obj-$(CONFIG_EXTCON_MAX14577) += extcon-max14577.o
> obj-$(CONFIG_EXTCON_MAX3355) += extcon-max3355.o
> obj-$(CONFIG_EXTCON_MAX77693) += extcon-max77693.o
> diff --git a/drivers/extcon/extcon-lc824206xa.c b/drivers/extcon/extcon-lc824206xa.c
> new file mode 100644
> index 000000000000..fdf4da50ff46
> --- /dev/null
> +++ b/drivers/extcon/extcon-lc824206xa.c
> @@ -0,0 +1,500 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * ON Semiconductor LC824206XA Micro USB Switch driver
> + *
> + * Copyright (c) 2024 Hans de Goede <[email protected]>
> + *
> + * ON Semiconductor has an "Advance Information" datasheet available
> + * (ENA2222-D.PDF), but no full datasheet. So there is no documentation
> + * available for the registers.
> + *
> + * This driver is based on the register info from the extcon-fsa9285.c driver,
> + * from the Lollipop Android sources for the Lenovo Yoga Tablet 2 (Pro)
> + * 830 / 1050 / 1380 models. Note despite the name this is actually a driver
> + * for the LC824206XA not the FSA9285. The Android sources can be downloaded
> + * from Lenovo's support page for these tablets, filename:
> + * yoga_tab_2_osc_android_to_lollipop_201505.rar.
> + */
> +
> +#include <linux/bits.h>
> +#include <linux/delay.h>
> +#include <linux/device.h>
> +#include <linux/extcon-provider.h>
> +#include <linux/i2c.h>
> +#include <linux/interrupt.h>
> +#include <linux/module.h>
> +#include <linux/power_supply.h>
> +#include <linux/property.h>
> +#include <linux/regulator/consumer.h>
> +#include <linux/workqueue.h>
> +
> +/*
> + * Register defines as mentioned above there is no datasheet with register
> + * info, so this may not be 100% accurate.
> + */
> +#define REG00 0x00
> +#define REG00_INIT_VALUE 0x01
> +
> +#define REG_STATUS 0x01
> +#define STATUS_OVP BIT(0)
> +#define STATUS_DATA_SHORT BIT(1)
> +#define STATUS_VBUS_PRESENT BIT(2)
> +#define STATUS_USB_ID GENMASK(7, 3)
> +#define STATUS_USB_ID_GND 0x80
> +#define STATUS_USB_ID_ACA 0xf0
> +#define STATUS_USB_ID_FLOAT 0xf8
> +
> +/*
> + * This controls the DP/DM muxes + other switches,
> + * meaning of individual bits is unknown.
> + */
> +#define REG_SWITCH_CONTROL 0x02
> +#define SWITCH_STEREO_MIC 0xc8
> +#define SWITCH_USB_HOST 0xec
> +#define SWITCH_DISCONNECTED 0xf8
> +#define SWITCH_USB_DEVICE 0xfc
> +
> +/* 5 bits? ADC 0x10 GND, 0x1a-0x1f ACA, 0x1f float */
> +#define REG_ID_PIN_ADC_VALUE 0x03
> +
> +/* Masks for all 3 interrupt registers */
> +#define INTR_ID_PIN_CHANGE BIT(0)
> +#define INTR_VBUS_CHANGE BIT(1)
> +/* Both of these get set after a continuous mode ADC conversion */
> +#define INTR_ID_PIN_ADC_INT1 BIT(2)
> +#define INTR_ID_PIN_ADC_INT2 BIT(3)
> +/* Charger type available in reg 0x09 */
> +#define INTR_CHARGER_DET_DONE BIT(4)
> +#define INTR_OVP BIT(5)
> +
> +/* There are 7 interrupt sources, bit 6 use is unknown (OCP?) */
> +#define INTR_ALL GENMASK(6, 0)
> +
> +/* Unmask interrupts this driver cares about */
> +#define INTR_MASK \
> + (INTR_ALL & ~(INTR_ID_PIN_CHANGE | INTR_VBUS_CHANGE | INTR_CHARGER_DET_DONE))
> +
> +/* Active (event happened and not cleared yet) interrupts */
> +#define REG_INTR_STATUS 0x04
> +
> +/*
> + * Writing a 1 to a bit here clears it in INTR_STATUS. These bits do NOT
> + * auto-reset to 0, so these must be set to 0 manually after clearing.
> + */
> +#define REG_INTR_CLEAR 0x05
> +
> +/* Interrupts which bit is set to 1 here will not raise the HW IRQ */
> +#define REG_INTR_MASK 0x06
> +
> +/* ID pin ADC control, meaning of individual bits is unknown */
> +#define REG_ID_PIN_ADC_CTRL 0x07
> +#define ID_PIN_ADC_AUTO 0x40
> +#define ID_PIN_ADC_CONTINUOUS 0x44
> +
> +#define REG_CHARGER_DET 0x08
> +#define CHARGER_DET_ON BIT(0)
> +#define CHARGER_DET_CDP_ON BIT(1)
> +#define CHARGER_DET_CDP_VAL BIT(2)
> +
> +#define REG_CHARGER_TYPE 0x09
> +#define CHARGER_TYPE_UNKNOWN 0x00
> +#define CHARGER_TYPE_DCP 0x01
> +#define CHARGER_TYPE_SDP_OR_CDP 0x04
> +#define CHARGER_TYPE_QC 0x06
> +
> +#define REG10 0x10
> +#define REG10_INIT_VALUE 0x00
> +
> +struct lc824206xa_data {
> + struct work_struct work;
> + struct i2c_client *client;
> + struct extcon_dev *edev;
> + struct power_supply *psy;
> + struct regulator *vbus_boost;
> + unsigned int usb_type;
> + unsigned int cable;
> + unsigned int previous_cable;
> + u8 switch_control;
> + u8 previous_switch_control;
> + bool vbus_ok;
> + bool vbus_boost_enabled;
> + bool fastcharge_over_miclr;
> +};
> +
> +static const unsigned int lc824206xa_cables[] = {
> + EXTCON_USB_HOST,
> + EXTCON_CHG_USB_SDP,
> + EXTCON_CHG_USB_CDP,
> + EXTCON_CHG_USB_DCP,
> + EXTCON_CHG_USB_ACA,
> + EXTCON_CHG_USB_FAST,
> + EXTCON_NONE,
> +};
> +
> +/* read/write reg helpers to add error logging to smbus byte functions */
> +static int lc824206xa_read_reg(struct lc824206xa_data *data, u8 reg)
> +{
> + int ret;
> +
> + ret = i2c_smbus_read_byte_data(data->client, reg);
> + if (ret < 0)
> + dev_err(&data->client->dev, "Error %d reading reg 0x%02x\n", ret, reg);
> +
> + return ret;
> +}
> +
> +static int lc824206xa_write_reg(struct lc824206xa_data *data, u8 reg, u8 val)
> +{
> + int ret;
> +
> + ret = i2c_smbus_write_byte_data(data->client, reg, val);
> + if (ret < 0)
> + dev_err(&data->client->dev, "Error %d writing reg 0x%02x\n", ret, reg);
> +
> + return ret;
> +}
> +
> +static int lc824206xa_get_id(struct lc824206xa_data *data)
> +{
> + int ret;
> +
> + ret = lc824206xa_write_reg(data, REG_ID_PIN_ADC_CTRL, ID_PIN_ADC_CONTINUOUS);
> + if (ret)
> + return ret;
> +
> + ret = lc824206xa_read_reg(data, REG_ID_PIN_ADC_VALUE);
> +
> + lc824206xa_write_reg(data, REG_ID_PIN_ADC_CTRL, ID_PIN_ADC_AUTO);
> +
> + return ret;
> +}
> +
> +static void lc824206xa_set_vbus_boost(struct lc824206xa_data *data, bool enable)
> +{
> + int ret;
> +
> + if (data->vbus_boost_enabled == enable)
> + return;
> +
> + if (enable)
> + ret = regulator_enable(data->vbus_boost);
> + else
> + ret = regulator_disable(data->vbus_boost);
> +
> + if (ret == 0)
> + data->vbus_boost_enabled = enable;
> + else
> + dev_err(&data->client->dev, "Error updating Vbus boost regulator: %d\n", ret);
> +}
> +
> +static void lc824206xa_charger_detect(struct lc824206xa_data *data)
> +{
> + int charger_type, ret;
> +
> + charger_type = lc824206xa_read_reg(data, REG_CHARGER_TYPE);
> + if (charger_type < 0)
> + return;
> +
> + dev_dbg(&data->client->dev, "charger type 0x%02x\n", charger_type);
> +
> + switch (charger_type) {
> + case CHARGER_TYPE_UNKNOWN:
> + data->usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
> + /* Treat as SDP */
> + data->cable = EXTCON_CHG_USB_SDP;
> + data->switch_control = SWITCH_USB_DEVICE;
> + break;
> + case CHARGER_TYPE_SDP_OR_CDP:
> + data->usb_type = POWER_SUPPLY_USB_TYPE_SDP;
> + data->cable = EXTCON_CHG_USB_SDP;
> + data->switch_control = SWITCH_USB_DEVICE;
> +
> + ret = lc824206xa_write_reg(data, REG_CHARGER_DET,
> + CHARGER_DET_CDP_ON | CHARGER_DET_ON);
> + if (ret < 0)
> + break;
> +
> + msleep(100);
> + ret = lc824206xa_read_reg(data, REG_CHARGER_DET);
> + if (ret >= 0 && (ret & CHARGER_DET_CDP_VAL)) {
> + data->usb_type = POWER_SUPPLY_USB_TYPE_CDP;
> + data->cable = EXTCON_CHG_USB_CDP;
> + }
> +
> + lc824206xa_write_reg(data, REG_CHARGER_DET, CHARGER_DET_ON);
> + break;
> + case CHARGER_TYPE_DCP:
> + data->usb_type = POWER_SUPPLY_USB_TYPE_DCP;
> + data->cable = EXTCON_CHG_USB_DCP;
> + if (data->fastcharge_over_miclr)
> + data->switch_control = SWITCH_STEREO_MIC;
> + else
> + data->switch_control = SWITCH_DISCONNECTED;
> + break;
> + case CHARGER_TYPE_QC:
> + data->usb_type = POWER_SUPPLY_USB_TYPE_DCP;
> + data->cable = EXTCON_CHG_USB_DCP;
> + data->switch_control = SWITCH_DISCONNECTED;
> + break;
> + default:
> + dev_warn(&data->client->dev, "Unknown charger type: 0x%02x\n", charger_type);
> + break;
> + }
> +}
> +
> +static void lc824206xa_work(struct work_struct *work)
> +{
> + struct lc824206xa_data *data = container_of(work, struct lc824206xa_data, work);
> + bool vbus_boost_enable = false;
> + int status, id;
> +
> + status = lc824206xa_read_reg(data, REG_STATUS);
> + if (status < 0)
> + return;
> +
> + dev_dbg(&data->client->dev, "status 0x%02x\n", status);
> +
> + data->vbus_ok = (status & (STATUS_VBUS_PRESENT | STATUS_OVP)) == STATUS_VBUS_PRESENT;
> +
> + /* Read id pin ADC if necessary */
> + switch (status & STATUS_USB_ID) {
> + case STATUS_USB_ID_GND:
> + case STATUS_USB_ID_FLOAT:
> + break;
> + default:
> + /* Happens when the connector is inserted slowly, log at dbg level */
> + dev_dbg(&data->client->dev, "Unknown status 0x%02x\n", status);
> + fallthrough;
> + case STATUS_USB_ID_ACA:
> + id = lc824206xa_get_id(data);
> + dev_dbg(&data->client->dev, "RID 0x%02x\n", id);
> + switch (id) {
> + case 0x10:
> + status = STATUS_USB_ID_GND;
> + break;
> + case 0x18 ... 0x1e:
> + status = STATUS_USB_ID_ACA;
> + break;
> + case 0x1f:
> + status = STATUS_USB_ID_FLOAT;
> + break;
> + default:
> + dev_warn(&data->client->dev, "Unknown RID 0x%02x\n", id);
> + return;
> + }
> + }
> +
> + /* Check for out of spec OTG charging hubs, treat as ACA */
> + if ((status & STATUS_USB_ID) == STATUS_USB_ID_GND &&
> + data->vbus_ok && !data->vbus_boost_enabled) {
> + dev_info(&data->client->dev, "Out of spec USB host adapter with Vbus present, not enabling 5V output\n");
> + status = STATUS_USB_ID_ACA;
> + }
> +
> + switch (status & STATUS_USB_ID) {
> + case STATUS_USB_ID_ACA:
> + data->usb_type = POWER_SUPPLY_USB_TYPE_ACA;
> + data->cable = EXTCON_CHG_USB_ACA;
> + data->switch_control = SWITCH_USB_HOST;
> + break;
> + case STATUS_USB_ID_GND:
> + data->usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
> + data->cable = EXTCON_USB_HOST;
> + data->switch_control = SWITCH_USB_HOST;
> + vbus_boost_enable = true;
> + break;
> + case STATUS_USB_ID_FLOAT:
> + /* When fast charging with Vbus > 5V, OVP will be set */
> + if (data->fastcharge_over_miclr &&
> + data->switch_control == SWITCH_STEREO_MIC &&
> + (status & STATUS_OVP)) {
> + data->cable = EXTCON_CHG_USB_FAST;
> + break;
> + }
> +
> + if (data->vbus_ok) {
> + lc824206xa_charger_detect(data);
> + } else {
> + data->usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
> + data->cable = EXTCON_NONE;
> + data->switch_control = SWITCH_DISCONNECTED;
> + }
> + break;
> + }
> +
> + lc824206xa_set_vbus_boost(data, vbus_boost_enable);
> +
> + if (data->switch_control != data->previous_switch_control) {
> + lc824206xa_write_reg(data, REG_SWITCH_CONTROL, data->switch_control);
> + data->previous_switch_control = data->switch_control;
> + }
> +
> + if (data->cable != data->previous_cable) {
> + extcon_set_state_sync(data->edev, data->previous_cable, false);
> + extcon_set_state_sync(data->edev, data->cable, true);
> + data->previous_cable = data->cable;
> + }
> +
> + power_supply_changed(data->psy);
> +}
> +
> +static irqreturn_t lc824206xa_irq(int irq, void *_data)
> +{
> + struct lc824206xa_data *data = _data;
> + int intr_status;
> +
> + intr_status = lc824206xa_read_reg(data, REG_INTR_STATUS);
> + if (intr_status < 0)
> + intr_status = INTR_ALL; /* Should never happen, clear all */
> +
> + dev_dbg(&data->client->dev, "interrupt 0x%02x\n", intr_status);
> +
> + lc824206xa_write_reg(data, REG_INTR_CLEAR, intr_status);
> + lc824206xa_write_reg(data, REG_INTR_CLEAR, 0);
> +
> + schedule_work(&data->work);
> + return IRQ_HANDLED;
> +}
> +
> +/*
> + * Newer charger (power_supply) drivers expect the max input current to be
> + * provided by a parent power_supply device for the charger chip.
> + */
> +static int lc824206xa_psy_get_prop(struct power_supply *psy,
> + enum power_supply_property psp,
> + union power_supply_propval *val)
> +{
> + struct lc824206xa_data *data = power_supply_get_drvdata(psy);
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_ONLINE:
> + val->intval = data->vbus_ok && !data->vbus_boost_enabled;
> + break;
> + case POWER_SUPPLY_PROP_USB_TYPE:
> + val->intval = data->usb_type;
> + break;
> + case POWER_SUPPLY_PROP_CURRENT_MAX:
> + switch (data->usb_type) {
> + case POWER_SUPPLY_USB_TYPE_DCP:
> + case POWER_SUPPLY_USB_TYPE_ACA:
> + val->intval = 2000000;
> + break;
> + case POWER_SUPPLY_USB_TYPE_CDP:
> + val->intval = 1500000;
> + break;
> + default:
> + val->intval = 500000;
> + }
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static const enum power_supply_usb_type lc824206xa_psy_usb_types[] = {
> + POWER_SUPPLY_USB_TYPE_SDP,
> + POWER_SUPPLY_USB_TYPE_CDP,
> + POWER_SUPPLY_USB_TYPE_DCP,
> + POWER_SUPPLY_USB_TYPE_ACA,
> + POWER_SUPPLY_USB_TYPE_UNKNOWN,
> +};
> +
> +static const enum power_supply_property lc824206xa_psy_props[] = {
> + POWER_SUPPLY_PROP_ONLINE,
> + POWER_SUPPLY_PROP_USB_TYPE,
> + POWER_SUPPLY_PROP_CURRENT_MAX,
> +};
> +
> +static const struct power_supply_desc lc824206xa_psy_desc = {
> + .name = "lc824206xa-charger-detect",
> + .type = POWER_SUPPLY_TYPE_USB,
> + .usb_types = lc824206xa_psy_usb_types,
> + .num_usb_types = ARRAY_SIZE(lc824206xa_psy_usb_types),
> + .properties = lc824206xa_psy_props,
> + .num_properties = ARRAY_SIZE(lc824206xa_psy_props),
> + .get_property = lc824206xa_psy_get_prop,
> +};
> +
> +static int lc824206xa_probe(struct i2c_client *client)
> +{
> + struct power_supply_config psy_cfg = { };
> + struct device *dev = &client->dev;
> + struct lc824206xa_data *data;
> + int ret;
> +
> + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
> + if (!data)
> + return -ENOMEM;
> +
> + data->client = client;
> + INIT_WORK(&data->work, lc824206xa_work);
> + data->cable = EXTCON_NONE;
> + data->previous_cable = EXTCON_NONE;
> + data->usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
> + /* Some designs use a custom fast-charge protocol over the mic L/R inputs */
> + data->fastcharge_over_miclr =
> + device_property_read_bool(dev, "onnn,enable-miclr-for-dcp");
> +
> + data->vbus_boost = devm_regulator_get(dev, "vbus");
> + if (IS_ERR(data->vbus_boost))
> + return dev_err_probe(dev, PTR_ERR(data->vbus_boost),
> + "getting regulator\n");
> +
> + /* Init */
> + ret = lc824206xa_write_reg(data, REG00, REG00_INIT_VALUE);
> + ret |= lc824206xa_write_reg(data, REG10, REG10_INIT_VALUE);
> + msleep(100);
> + ret |= lc824206xa_write_reg(data, REG_INTR_CLEAR, INTR_ALL);
> + ret |= lc824206xa_write_reg(data, REG_INTR_CLEAR, 0);
> + ret |= lc824206xa_write_reg(data, REG_INTR_MASK, INTR_MASK);
> + ret |= lc824206xa_write_reg(data, REG_ID_PIN_ADC_CTRL, ID_PIN_ADC_AUTO);
> + ret |= lc824206xa_write_reg(data, REG_CHARGER_DET, CHARGER_DET_ON);
> + if (ret)
> + return -EIO;
> +
> + /* Initialize extcon device */
> + data->edev = devm_extcon_dev_allocate(dev, lc824206xa_cables);
> + if (IS_ERR(data->edev))
> + return PTR_ERR(data->edev);
> +
> + ret = devm_extcon_dev_register(dev, data->edev);
> + if (ret)
> + return dev_err_probe(dev, ret, "registering extcon device\n");
> +
> + psy_cfg.drv_data = data;
> + data->psy = devm_power_supply_register(dev, &lc824206xa_psy_desc, &psy_cfg);
> + if (IS_ERR(data->psy))
> + return dev_err_probe(dev, PTR_ERR(data->psy), "registering power supply\n");
> +
> + ret = devm_request_threaded_irq(dev, client->irq, NULL, lc824206xa_irq,
> + IRQF_TRIGGER_LOW | IRQF_ONESHOT,
> + KBUILD_MODNAME, data);
> + if (ret)
> + return dev_err_probe(dev, ret, "requesting IRQ\n");
> +
> + /* Sync initial state */
> + schedule_work(&data->work);
> + return 0;
> +}
> +
> +static const struct i2c_device_id lc824206xa_i2c_ids[] = {
> + { "lc824206xa" },
> + { }
> +};
> +MODULE_DEVICE_TABLE(i2c, lc824206xa_i2c_ids);
> +
> +static struct i2c_driver lc824206xa_driver = {
> + .driver = {
> + .name = KBUILD_MODNAME,
> + },
> + .probe = lc824206xa_probe,
> + .id_table = lc824206xa_i2c_ids,
> +};
> +
> +module_i2c_driver(lc824206xa_driver);
> +
> +MODULE_AUTHOR("Hans de Goede <[email protected]>");
> +MODULE_DESCRIPTION("LC824206XA Micro USB Switch driver");
> +MODULE_LICENSE("GPL");
> --
> 2.44.0
>
>
Firstly, I'm sorry for late reply.
When I check the patch with checkpatch script, there are following warnings.
Could you please fix it?
Traceback (most recent call last):
File "scripts/spdxcheck.py", line 11, in <module>
import git
ModuleNotFoundError: No module named 'git'
WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#71:
new file mode 100644
ERROR: trailing whitespace
#241: FILE: drivers/extcon/extcon-lc824206xa.c:166:
+^I$
ERROR: code indent should use tabs where possible
#322: FILE: drivers/extcon/extcon-lc824206xa.c:247:
+ struct lc824206xa_data *data = container_of(work, struct
lc824206xa_data, work);$
WARNING: please, no spaces at the start of a line
#322: FILE: drivers/extcon/extcon-lc824206xa.c:247:
+ struct lc824206xa_data *data = container_of(work, struct
lc824206xa_data, work);$
ERROR: code indent should use tabs where possible
#323: FILE: drivers/extcon/extcon-lc824206xa.c:248:
+ bool vbus_boost_enable = false;$
WARNING: please, no spaces at the start of a line
#323: FILE: drivers/extcon/extcon-lc824206xa.c:248:
+ bool vbus_boost_enable = false;$
ERROR: code indent should use tabs where possible
#324: FILE: drivers/extcon/extcon-lc824206xa.c:249:
+ int status, id;$
WARNING: please, no spaces at the start of a line
#324: FILE: drivers/extcon/extcon-lc824206xa.c:249:
+ int status, id;$
ERROR: code indent should use tabs where possible
#326: FILE: drivers/extcon/extcon-lc824206xa.c:251:
+ status = lc824206xa_read_reg(data, REG_STATUS);$
WARNING: please, no spaces at the start of a line
#326: FILE: drivers/extcon/extcon-lc824206xa.c:251:
+ status = lc824206xa_read_reg(data, REG_STATUS);$
ERROR: code indent should use tabs where possible
#327: FILE: drivers/extcon/extcon-lc824206xa.c:252:
+ if (status < 0)$
WARNING: please, no spaces at the start of a line
#327: FILE: drivers/extcon/extcon-lc824206xa.c:252:
+ if (status < 0)$
ERROR: code indent should use tabs where possible
#328: FILE: drivers/extcon/extcon-lc824206xa.c:253:
+ ^Ireturn;$
WARNING: please, no space before tabs
#328: FILE: drivers/extcon/extcon-lc824206xa.c:253:
+ ^Ireturn;$
WARNING: please, no spaces at the start of a line
#328: FILE: drivers/extcon/extcon-lc824206xa.c:253:
+ ^Ireturn;$
ERROR: trailing whitespace
#430: FILE: drivers/extcon/extcon-lc824206xa.c:355:
+^Ischedule_work(&data->work);^I^I$
ERROR: trailing whitespace
#553: FILE: drivers/extcon/extcon-lc824206xa.c:478:
+^Ischedule_work(&data->work);^I^I$
total: 9 errors, 8 warnings, 524 lines checked
NOTE: For some of the reported defects, checkpatch may be able to
mechanically convert to the typical style using --fix or --fix-inplace.
NOTE: Whitespace errors detected.
You may wish to use scripts/cleanpatch or scripts/cleanfile
--
Best Regards,
Chanwoo Choi
Samsung Electronics
Hi,
On 5/8/24 5:21 PM, Chanwoo Choi wrote:
> On Sat, Apr 6, 2024 at 11:07 PM Hans de Goede <[email protected]> wrote:
>>
>> Add a new driver for the ON Semiconductor LC824206XA microUSB switch and
>> accessory detector chip.
>>
>> ON Semiconductor has an "Advance Information" datasheet available
>> (ENA2222-D.PDF), but no full datasheet. So there is no documentation
>> available for the registers.
>>
>> This driver is based on the register info from the extcon-fsa9285.c driver,
>> from the Lollipop Android sources for the Lenovo Yoga Tablet 2 (Pro)
>> 830 / 1050 / 1380 models. Note despite the name this is actually a driver
>> for the LC824206XA not the FSA9285.
>>
>> This has only been tested on a Lenovo Yoga Tablet 2 Pro 1380 and
>> using the driver on other setups may require additional work.
>>
>> So far this driver is only used on x86/ACPI (non devicetree) devs.
>> Therefor there is no devicetree bindings documentation for this driver's
>> "onnn,enable-miclr-for-dcp" property since this is not used in actual
>> devicetree files and the dt bindings maintainers have requested properties
>> with no actual dt users to _not_ be added to the dt bindings.
>>
>> Signed-off-by: Hans de Goede <[email protected]>
<snip>
> Firstly, I'm sorry for late reply.
>
> When I check the patch with checkpatch script, there are following warnings.
> Could you please fix it?
Weird, I normally always run checkpatch myself before submitting
I must have forgotten that this time.
I'll submit a new version addressing the checkpatch issues.
Regards,
Hans
>
> Traceback (most recent call last):
> File "scripts/spdxcheck.py", line 11, in <module>
> import git
> ModuleNotFoundError: No module named 'git'
> WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
> #71:
> new file mode 100644
>
> ERROR: trailing whitespace
> #241: FILE: drivers/extcon/extcon-lc824206xa.c:166:
> +^I$
>
> ERROR: code indent should use tabs where possible
> #322: FILE: drivers/extcon/extcon-lc824206xa.c:247:
> + struct lc824206xa_data *data = container_of(work, struct
> lc824206xa_data, work);$
>
> WARNING: please, no spaces at the start of a line
> #322: FILE: drivers/extcon/extcon-lc824206xa.c:247:
> + struct lc824206xa_data *data = container_of(work, struct
> lc824206xa_data, work);$
>
> ERROR: code indent should use tabs where possible
> #323: FILE: drivers/extcon/extcon-lc824206xa.c:248:
> + bool vbus_boost_enable = false;$
>
> WARNING: please, no spaces at the start of a line
> #323: FILE: drivers/extcon/extcon-lc824206xa.c:248:
> + bool vbus_boost_enable = false;$
>
> ERROR: code indent should use tabs where possible
> #324: FILE: drivers/extcon/extcon-lc824206xa.c:249:
> + int status, id;$
>
> WARNING: please, no spaces at the start of a line
> #324: FILE: drivers/extcon/extcon-lc824206xa.c:249:
> + int status, id;$
>
> ERROR: code indent should use tabs where possible
> #326: FILE: drivers/extcon/extcon-lc824206xa.c:251:
> + status = lc824206xa_read_reg(data, REG_STATUS);$
>
> WARNING: please, no spaces at the start of a line
> #326: FILE: drivers/extcon/extcon-lc824206xa.c:251:
> + status = lc824206xa_read_reg(data, REG_STATUS);$
>
> ERROR: code indent should use tabs where possible
> #327: FILE: drivers/extcon/extcon-lc824206xa.c:252:
> + if (status < 0)$
>
> WARNING: please, no spaces at the start of a line
> #327: FILE: drivers/extcon/extcon-lc824206xa.c:252:
> + if (status < 0)$
>
> ERROR: code indent should use tabs where possible
> #328: FILE: drivers/extcon/extcon-lc824206xa.c:253:
> + ^Ireturn;$
>
> WARNING: please, no space before tabs
> #328: FILE: drivers/extcon/extcon-lc824206xa.c:253:
> + ^Ireturn;$
>
> WARNING: please, no spaces at the start of a line
> #328: FILE: drivers/extcon/extcon-lc824206xa.c:253:
> + ^Ireturn;$
>
> ERROR: trailing whitespace
> #430: FILE: drivers/extcon/extcon-lc824206xa.c:355:
> +^Ischedule_work(&data->work);^I^I$
>
> ERROR: trailing whitespace
> #553: FILE: drivers/extcon/extcon-lc824206xa.c:478:
> +^Ischedule_work(&data->work);^I^I$
>
> total: 9 errors, 8 warnings, 524 lines checked
>
> NOTE: For some of the reported defects, checkpatch may be able to
> mechanically convert to the typical style using --fix or --fix-inplace.
>
> NOTE: Whitespace errors detected.
> You may wish to use scripts/cleanpatch or scripts/cleanfile
>
>
>