[PATCH v2 0/1] intel_cht_int33fe: Split code to USB TypeB and TypeC variants

[PATCH v2 0/1] intel_cht_int33fe: Split code to USB TypeB and TypeC variants

[Yauhen Kharuzhy]

Patch to support INT33FE ACPI pseudo-device on hardware with USB Type B
connector.

v2:
Instead of defining two separated modules with two separated config
options, compile {common,typeb,typec} sources into one .ko module.
Call needed variant-specific probe function based after of hardware type
detection in common code.

Yauhen Kharuzhy (1):
  platform/x86/intel_cht_int33fe: Split code to USB TypeB and TypeC
    variants

 drivers/platform/x86/Kconfig                  |  14 +-
 drivers/platform/x86/Makefile                 |   4 +
 .../platform/x86/intel_cht_int33fe_common.c   | 148 ++++++++++++++++++
 .../platform/x86/intel_cht_int33fe_common.h   |  44 ++++++
 .../platform/x86/intel_cht_int33fe_typeb.c    |  64 ++++++++
 ...ht_int33fe.c => intel_cht_int33fe_typec.c} |  79 +---------
 6 files changed, 278 insertions(+), 75 deletions(-)
 create mode 100644 drivers/platform/x86/intel_cht_int33fe_common.c
 create mode 100644 drivers/platform/x86/intel_cht_int33fe_common.h
 create mode 100644 drivers/platform/x86/intel_cht_int33fe_typeb.c
 rename drivers/platform/x86/{intel_cht_int33fe.c => intel_cht_int33fe_typec.c} (83%)

-- 
2.20.1

[PATCH v2 1/1] platform/x86/intel_cht_int33fe: Split code to USB TypeB and TypeC variants

[Yauhen Kharuzhy]

Existing intel_cht_int33fe ACPI pseudo-device driver assumes that
hardware has TypeC connector and register related devices described as
I2C connections in the _CRS resource.

There is at least one hardware (Lenovo Yoga Book YB1-91L/F) with micro
USB B connector exists. It has INT33FE device in the DSDT table but
there are only two I2C connection described: PMIC and BQ27452 battery
fuel gauge.

Splitting existing INT33FE driver allow to maintain code for USB type B
(AB) connector variant separately and make it simpler.

Split driver to intel_cht_int33fe_common.c and
intel_cht_int33fe_{typeb,typec}.c. Compile all this source to one .ko
module to make user experience easier.

Signed-off-by: Yauhen Kharuzhy <jekhor@gmail.com>
---
 drivers/platform/x86/Kconfig                  |  14 +-
 drivers/platform/x86/Makefile                 |   4 +
 .../platform/x86/intel_cht_int33fe_common.c   | 148 ++++++++++++++++++
 .../platform/x86/intel_cht_int33fe_common.h   |  44 ++++++
 .../platform/x86/intel_cht_int33fe_typeb.c    |  64 ++++++++
 ...ht_int33fe.c => intel_cht_int33fe_typec.c} |  79 +---------
 6 files changed, 278 insertions(+), 75 deletions(-)
 create mode 100644 drivers/platform/x86/intel_cht_int33fe_common.c
 create mode 100644 drivers/platform/x86/intel_cht_int33fe_common.h
 create mode 100644 drivers/platform/x86/intel_cht_int33fe_typeb.c
 rename drivers/platform/x86/{intel_cht_int33fe.c => intel_cht_int33fe_typec.c} (83%)

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 1b67bb578f9f..c7ce3f17ca70 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -926,18 +926,24 @@ config INTEL_CHT_INT33FE
 	depends on CHARGER_BQ24190=y || (CHARGER_BQ24190=m && m)
 	depends on USB_ROLES_INTEL_XHCI=y || (USB_ROLES_INTEL_XHCI=m && m)
 	depends on TYPEC_MUX_PI3USB30532=y || (TYPEC_MUX_PI3USB30532=m && m)
-	---help---
+	help
 	  This driver add support for the INT33FE ACPI device found on
 	  some Intel Cherry Trail devices.
 
+	  There are two kinds of INT33FE ACPI device possible: for hardware
+	  with USB TypeC and TypeB connectors. This driver supports both.
+
 	  The INT33FE ACPI device has a CRS table with I2cSerialBusV2
-	  resources for 3 devices: Maxim MAX17047 Fuel Gauge Controller,
-	  FUSB302 USB Type-C Controller and PI3USB30532 USB switch.
+	  resources for Fuel Gauge Controller and (in TypeC variant) FUSB302
+	  USB Type-C Controller and PI3USB30532 USB switch.
 	  This driver instantiates i2c-clients for these, so that standard
 	  i2c drivers for these chips can bind to the them.
 
 	  If you enable this driver it is advised to also select
-	  CONFIG_TYPEC_FUSB302=m and CONFIG_BATTERY_MAX17042=m.
+	  CONFIG_BATTERY_BQ27XXX=m and CONFIG_BATTERY_BQ27XXX_I2C=m for TypeB
+	  device and CONFIG_TYPEC_FUSB302=m and CONFIG_BATTERY_MAX17042=m
+	  for TypeC device.
+
 
 config INTEL_INT0002_VGPIO
 	tristate "Intel ACPI INT0002 Virtual GPIO driver"
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index 415104033060..f74664515d09 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -61,6 +61,10 @@ obj-$(CONFIG_TOSHIBA_BT_RFKILL)	+= toshiba_bluetooth.o
 obj-$(CONFIG_TOSHIBA_HAPS)	+= toshiba_haps.o
 obj-$(CONFIG_TOSHIBA_WMI)	+= toshiba-wmi.o
 obj-$(CONFIG_INTEL_CHT_INT33FE)	+= intel_cht_int33fe.o
+intel_cht_int33fe-objs		:= intel_cht_int33fe_common.o \
+				   intel_cht_int33fe_typec.o \
+				   intel_cht_int33fe_typeb.o
+
 obj-$(CONFIG_INTEL_INT0002_VGPIO) += intel_int0002_vgpio.o
 obj-$(CONFIG_INTEL_HID_EVENT)	+= intel-hid.o
 obj-$(CONFIG_INTEL_VBTN)	+= intel-vbtn.o
diff --git a/drivers/platform/x86/intel_cht_int33fe_common.c b/drivers/platform/x86/intel_cht_int33fe_common.c
new file mode 100644
index 000000000000..4a3d7ebd37dd
--- /dev/null
+++ b/drivers/platform/x86/intel_cht_int33fe_common.c
@@ -0,0 +1,148 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Common code for Intel Cherry Trail ACPI INT33FE pseudo device drivers
+ * (USB TypeB and TypeC connector variants).
+ *
+ * Copyright (c) 2019 Yauhen Kharuzhy <jekhor@gmail.com>
+ */
+
+#include <linux/acpi.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include "intel_cht_int33fe_common.h"
+
+#define EXPECTED_PTYPE		4
+
+static int cht_int33fe_i2c_res_filter(struct acpi_resource *ares, void *data)
+{
+	struct acpi_resource_i2c_serialbus *sb;
+	int *count = data;
+
+	if (i2c_acpi_get_i2c_resource(ares, &sb))
+		(*count)++;
+
+	return 1;
+}
+
+static int cht_int33fe_count_i2c_clients(struct device *dev)
+{
+	struct acpi_device *adev;
+	LIST_HEAD(resource_list);
+	int count = 0;
+
+	adev = ACPI_COMPANION(dev);
+	if (!adev)
+		return -EINVAL;
+
+	acpi_dev_get_resources(adev, &resource_list,
+			       cht_int33fe_i2c_res_filter, &count);
+
+	acpi_dev_free_resource_list(&resource_list);
+
+	return count;
+}
+
+static int cht_int33fe_check_hw_type(struct device *dev)
+{
+	unsigned long long ptyp;
+	acpi_status status;
+	int ret;
+
+	status = acpi_evaluate_integer(ACPI_HANDLE(dev), "PTYP", NULL, &ptyp);
+	if (ACPI_FAILURE(status)) {
+		dev_err(dev, "Error getting PTYPE\n");
+		return -ENODEV;
+	}
+
+	/*
+	 * The same ACPI HID is used for different configurations check PTYP
+	 * to ensure that we are dealing with the expected config.
+	 */
+	if (ptyp != EXPECTED_PTYPE)
+		return -ENODEV;
+
+	/* Check presence of INT34D3 (hardware-rev 3) expected for ptype == 4 */
+	if (!acpi_dev_present("INT34D3", "1", 3)) {
+		dev_err(dev, "Error PTYPE == %d, but no INT34D3 device\n",
+			EXPECTED_PTYPE);
+		return -ENODEV;
+	}
+
+	ret = cht_int33fe_count_i2c_clients(dev);
+	if (ret < 0)
+		return ret;
+
+	switch (ret) {
+	case 2:
+		return INT33FE_HW_TYPEB;
+	case 4:
+		return INT33FE_HW_TYPEC;
+	default:
+		return -ENODEV;
+	}
+}
+
+static int cht_int33fe_probe(struct platform_device *pdev)
+{
+	struct cht_int33fe_data *data;
+	struct device *dev = &pdev->dev;
+	int ret;
+
+	ret = cht_int33fe_check_hw_type(dev);
+	if (ret < 0)
+		return ret;
+
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	data->hw_type = ret;
+	data->dev = dev;
+
+	switch (data->hw_type) {
+	case INT33FE_HW_TYPEB:
+		data->probe = cht_int33fe_typeb_probe;
+		data->remove = cht_int33fe_typeb_remove;
+		break;
+
+	case INT33FE_HW_TYPEC:
+		data->probe = cht_int33fe_typec_probe;
+		data->remove = cht_int33fe_typec_remove;
+		break;
+	}
+
+	platform_set_drvdata(pdev, data);
+
+	return data->probe(data);
+}
+
+static int cht_int33fe_remove(struct platform_device *pdev)
+{
+	struct cht_int33fe_data *data = platform_get_drvdata(pdev);
+
+	return data->remove(data);
+}
+
+static const struct acpi_device_id cht_int33fe_acpi_ids[] = {
+	{ "INT33FE", },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, cht_int33fe_acpi_ids);
+
+static struct platform_driver cht_int33fe_driver = {
+	.driver	= {
+		.name = "Intel Cherry Trail ACPI INT33FE driver",
+		.acpi_match_table = ACPI_PTR(cht_int33fe_acpi_ids),
+	},
+	.probe = cht_int33fe_probe,
+	.remove = cht_int33fe_remove,
+};
+
+module_platform_driver(cht_int33fe_driver);
+
+MODULE_DESCRIPTION("Intel Cherry Trail ACPI INT33FE pseudo device driver");
+MODULE_AUTHOR("Yauhen Kharuzhy <jekhor@gmail.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/platform/x86/intel_cht_int33fe_common.h b/drivers/platform/x86/intel_cht_int33fe_common.h
new file mode 100644
index 000000000000..cb0cc4552017
--- /dev/null
+++ b/drivers/platform/x86/intel_cht_int33fe_common.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Common code for Intel Cherry Trail ACPI INT33FE pseudo device drivers
+ * (microUSB and TypeC connector variants), header file
+ *
+ * Copyright (c) 2019 Yauhen Kharuzhy <jekhor@gmail.com>
+ */
+
+#ifndef _INTEL_CHT_INT33FE_COMMON_H
+#define _INTEL_CHT_INT33FE_COMMON_H
+
+#include <linux/device.h>
+#include <linux/fwnode.h>
+#include <linux/i2c.h>
+
+enum int33fe_hw_type {
+	INT33FE_HW_TYPEC,
+	INT33FE_HW_TYPEB,
+};
+
+struct cht_int33fe_data {
+	enum int33fe_hw_type hw_type;
+	struct device *dev;
+
+	int (*probe)(struct cht_int33fe_data *data);
+	int (*remove)(struct cht_int33fe_data *data);
+
+	struct i2c_client *battery_fg;
+
+	/* TypeC only */
+	struct i2c_client *fusb302;
+	struct i2c_client *pi3usb30532;
+
+	struct fwnode_handle *dp;
+	struct fwnode_handle *mux;
+};
+
+int cht_int33fe_typeb_probe(struct cht_int33fe_data *data);
+int cht_int33fe_typeb_remove(struct cht_int33fe_data *data);
+int cht_int33fe_typec_probe(struct cht_int33fe_data *data);
+int cht_int33fe_typec_remove(struct cht_int33fe_data *data);
+
+#endif /* _INTEL_CHT_INT33FE_COMMON_H */
+
diff --git a/drivers/platform/x86/intel_cht_int33fe_typeb.c b/drivers/platform/x86/intel_cht_int33fe_typeb.c
new file mode 100644
index 000000000000..905c29f2f714
--- /dev/null
+++ b/drivers/platform/x86/intel_cht_int33fe_typeb.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Intel Cherry Trail ACPI INT33FE pseudo device driver for devices with
+ * microUSB connector (e.g. without of FUSB302 USB Type-C controller)
+ *
+ * Copyright (C) 2019 Yauhen Kharuzhy <jekhor@gmail.com>
+ *
+ * At least one Intel Cherry Trail based device which ship with Windows 10
+ * (Lenovo YogaBook YB1-X91L/F tablet), have this weird INT33FE ACPI device
+ * with a CRS table with 2 I2cSerialBusV2 resources, for 2 different chips
+ * attached to various i2c busses:
+ * 1. The Whiskey Cove pmic, which is also described by the INT34D3 ACPI device
+ * 2. TI BQ27542 Fuel Gauge Controller
+ *
+ * So this driver is a stub / pseudo driver whose only purpose is to
+ * instantiate i2c-client for battery fuel gauge, so that standard i2c driver
+ * for these chip can bind to the it.
+ */
+
+#include <linux/acpi.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/usb/pd.h>
+
+#include "intel_cht_int33fe_common.h"
+
+static const char * const bq27xxx_suppliers[] = { "bq25890-charger" };
+
+static const struct property_entry bq27xxx_props[] = {
+	PROPERTY_ENTRY_STRING_ARRAY("supplied-from", bq27xxx_suppliers),
+	{ }
+};
+
+int cht_int33fe_typeb_probe(struct cht_int33fe_data *data)
+{
+	struct device *dev = data->dev;
+	struct i2c_board_info board_info;
+
+	memset(&board_info, 0, sizeof(board_info));
+	strscpy(board_info.type, "bq27542", ARRAY_SIZE(board_info.type));
+	board_info.dev_name = "bq27542";
+	board_info.properties = bq27xxx_props;
+	data->battery_fg = i2c_acpi_new_device(dev, 1, &board_info);
+
+	if (IS_ERR(data->battery_fg)) {
+		dev_err(dev, "Failed to register battery fuel gauge: %ld\n",
+			PTR_ERR(data->battery_fg));
+		return PTR_ERR(data->battery_fg);
+	}
+
+	return 0;
+}
+
+int cht_int33fe_typeb_remove(struct cht_int33fe_data *data)
+{
+	i2c_unregister_device(data->battery_fg);
+
+	return 0;
+}
+
diff --git a/drivers/platform/x86/intel_cht_int33fe.c b/drivers/platform/x86/intel_cht_int33fe_typec.c
similarity index 83%
rename from drivers/platform/x86/intel_cht_int33fe.c
rename to drivers/platform/x86/intel_cht_int33fe_typec.c
index 4fbdff48a4b5..b59709418d6f 100644
--- a/drivers/platform/x86/intel_cht_int33fe.c
+++ b/drivers/platform/x86/intel_cht_int33fe_typec.c
@@ -17,17 +17,15 @@
  * for these chips can bind to the them.
  */
 
-#include <linux/acpi.h>
 #include <linux/i2c.h>
 #include <linux/interrupt.h>
-#include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
 #include <linux/slab.h>
 #include <linux/usb/pd.h>
 
-#define EXPECTED_PTYPE		4
+#include "intel_cht_int33fe_common.h"
 
 enum {
 	INT33FE_NODE_FUSB302,
@@ -39,15 +37,6 @@ enum {
 	INT33FE_NODE_MAX,
 };
 
-struct cht_int33fe_data {
-	struct i2c_client *max17047;
-	struct i2c_client *fusb302;
-	struct i2c_client *pi3usb30532;
-
-	struct fwnode_handle *dp;
-	struct fwnode_handle *mux;
-};
-
 static const struct software_node nodes[];
 
 static const struct software_node_ref_args pi3usb30532_ref = {
@@ -288,43 +277,20 @@ cht_int33fe_register_max17047(struct device *dev, struct cht_int33fe_data *data)
 	strlcpy(board_info.type, "max17047", I2C_NAME_SIZE);
 	board_info.dev_name = "max17047";
 	board_info.fwnode = fwnode;
-	data->max17047 = i2c_acpi_new_device(dev, 1, &board_info);
+	data->battery_fg = i2c_acpi_new_device(dev, 1, &board_info);
 
-	return PTR_ERR_OR_ZERO(data->max17047);
+	return PTR_ERR_OR_ZERO(data->battery_fg);
 }
 
-static int cht_int33fe_probe(struct platform_device *pdev)
+int cht_int33fe_typec_probe(struct cht_int33fe_data *data)
 {
-	struct device *dev = &pdev->dev;
+	struct device *dev = data->dev;
 	struct i2c_board_info board_info;
-	struct cht_int33fe_data *data;
 	struct fwnode_handle *fwnode;
 	struct regulator *regulator;
-	unsigned long long ptyp;
-	acpi_status status;
 	int fusb302_irq;
 	int ret;
 
-	status = acpi_evaluate_integer(ACPI_HANDLE(dev), "PTYP", NULL, &ptyp);
-	if (ACPI_FAILURE(status)) {
-		dev_err(dev, "Error getting PTYPE\n");
-		return -ENODEV;
-	}
-
-	/*
-	 * The same ACPI HID is used for different configurations check PTYP
-	 * to ensure that we are dealing with the expected config.
-	 */
-	if (ptyp != EXPECTED_PTYPE)
-		return -ENODEV;
-
-	/* Check presence of INT34D3 (hardware-rev 3) expected for ptype == 4 */
-	if (!acpi_dev_present("INT34D3", "1", 3)) {
-		dev_err(dev, "Error PTYPE == %d, but no INT34D3 device\n",
-			EXPECTED_PTYPE);
-		return -ENODEV;
-	}
-
 	/*
 	 * We expect the WC PMIC to be paired with a TI bq24292i charger-IC.
 	 * We check for the bq24292i vbus regulator here, this has 2 purposes:
@@ -354,10 +320,6 @@ static int cht_int33fe_probe(struct platform_device *pdev)
 		return fusb302_irq;
 	}
 
-	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
-	if (!data)
-		return -ENOMEM;
-
 	ret = cht_int33fe_add_nodes(data);
 	if (ret)
 		return ret;
@@ -402,15 +364,13 @@ static int cht_int33fe_probe(struct platform_device *pdev)
 		goto out_unregister_fusb302;
 	}
 
-	platform_set_drvdata(pdev, data);
-
 	return 0;
 
 out_unregister_fusb302:
 	i2c_unregister_device(data->fusb302);
 
 out_unregister_max17047:
-	i2c_unregister_device(data->max17047);
+	i2c_unregister_device(data->battery_fg);
 
 out_remove_nodes:
 	cht_int33fe_remove_nodes(data);
@@ -418,36 +378,13 @@ static int cht_int33fe_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int cht_int33fe_remove(struct platform_device *pdev)
+int cht_int33fe_typec_remove(struct cht_int33fe_data *data)
 {
-	struct cht_int33fe_data *data = platform_get_drvdata(pdev);
-
 	i2c_unregister_device(data->pi3usb30532);
 	i2c_unregister_device(data->fusb302);
-	i2c_unregister_device(data->max17047);
+	i2c_unregister_device(data->battery_fg);
 
 	cht_int33fe_remove_nodes(data);
 
 	return 0;
 }
-
-static const struct acpi_device_id cht_int33fe_acpi_ids[] = {
-	{ "INT33FE", },
-	{ }
-};
-MODULE_DEVICE_TABLE(acpi, cht_int33fe_acpi_ids);
-
-static struct platform_driver cht_int33fe_driver = {
-	.driver	= {
-		.name = "Intel Cherry Trail ACPI INT33FE driver",
-		.acpi_match_table = ACPI_PTR(cht_int33fe_acpi_ids),
-	},
-	.probe = cht_int33fe_probe,
-	.remove = cht_int33fe_remove,
-};
-
-module_platform_driver(cht_int33fe_driver);
-
-MODULE_DESCRIPTION("Intel Cherry Trail ACPI INT33FE pseudo device driver");
-MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
-MODULE_LICENSE("GPL v2");
-- 
2.20.1

Re: [PATCH v2 1/1] platform/x86/intel_cht_int33fe: Split code to USB TypeB and TypeC variants

[Hans de Goede]

Hi,

On 17-09-2019 21:45, Yauhen Kharuzhy wrote:
> Existing intel_cht_int33fe ACPI pseudo-device driver assumes that
> hardware has TypeC connector and register related devices described as
> I2C connections in the _CRS resource.
> 
> There is at least one hardware (Lenovo Yoga Book YB1-91L/F) with micro
> USB B connector exists. It has INT33FE device in the DSDT table but
> there are only two I2C connection described: PMIC and BQ27452 battery
> fuel gauge.
> 
> Splitting existing INT33FE driver allow to maintain code for USB type B
> (AB) connector variant separately and make it simpler.
> 
> Split driver to intel_cht_int33fe_common.c and
> intel_cht_int33fe_{typeb,typec}.c. Compile all this source to one .ko
> module to make user experience easier.
> 
> Signed-off-by: Yauhen Kharuzhy <jekhor@gmail.com>

Thank you for doing this, this version looks much better IMHO.

Note that this does not apply to Linus' current master, please
rebase. Specifically this conflicts with this patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=78cd4bf53635d3aeb73435bc89eb6eb39450f315

Which just got merged. Instead of rebasing on Linus' master
(which is always a bit adventurous to use during the merge window)
you can also cherry-pick that single commit on top of v5.3
and use that as a base.

Note that that patch makes changes to struct cht_int33fe_data
specifically it drops the:

	struct fwnode_handle *mux;

Member, so when rebasing you should drop that in the new
version of the struct on common.h .

Besides that this need a rebase, overall this looks good, I have some
small remarks inline:

<snip>

> diff --git a/drivers/platform/x86/intel_cht_int33fe_common.c b/drivers/platform/x86/intel_cht_int33fe_common.c
> new file mode 100644
> index 000000000000..4a3d7ebd37dd
> --- /dev/null
> +++ b/drivers/platform/x86/intel_cht_int33fe_common.c
> @@ -0,0 +1,148 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Common code for Intel Cherry Trail ACPI INT33FE pseudo device drivers
> + * (USB TypeB and TypeC connector variants).
> + *
> + * Copyright (c) 2019 Yauhen Kharuzhy <jekhor@gmail.com>
> + */
> +
> +#include <linux/acpi.h>
> +#include <linux/i2c.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/slab.h>
> +
> +#include "intel_cht_int33fe_common.h"
> +
> +#define EXPECTED_PTYPE		4
> +
> +static int cht_int33fe_i2c_res_filter(struct acpi_resource *ares, void *data)
> +{
> +	struct acpi_resource_i2c_serialbus *sb;
> +	int *count = data;
> +
> +	if (i2c_acpi_get_i2c_resource(ares, &sb))
> +		(*count)++;
> +
> +	return 1;
> +}
> +
> +static int cht_int33fe_count_i2c_clients(struct device *dev)
> +{
> +	struct acpi_device *adev;
> +	LIST_HEAD(resource_list);
> +	int count = 0;
> +
> +	adev = ACPI_COMPANION(dev);
> +	if (!adev)
> +		return -EINVAL;
> +
> +	acpi_dev_get_resources(adev, &resource_list,
> +			       cht_int33fe_i2c_res_filter, &count);
> +
> +	acpi_dev_free_resource_list(&resource_list);
> +
> +	return count;
> +}
> +
> +static int cht_int33fe_check_hw_type(struct device *dev)
> +{
> +	unsigned long long ptyp;
> +	acpi_status status;
> +	int ret;
> +
> +	status = acpi_evaluate_integer(ACPI_HANDLE(dev), "PTYP", NULL, &ptyp);
> +	if (ACPI_FAILURE(status)) {
> +		dev_err(dev, "Error getting PTYPE\n");
> +		return -ENODEV;
> +	}
> +
> +	/*
> +	 * The same ACPI HID is used for different configurations check PTYP
> +	 * to ensure that we are dealing with the expected config.
> +	 */
> +	if (ptyp != EXPECTED_PTYPE)
> +		return -ENODEV;
> +
> +	/* Check presence of INT34D3 (hardware-rev 3) expected for ptype == 4 */
> +	if (!acpi_dev_present("INT34D3", "1", 3)) {
> +		dev_err(dev, "Error PTYPE == %d, but no INT34D3 device\n",
> +			EXPECTED_PTYPE);
> +		return -ENODEV;
> +	}
> +
> +	ret = cht_int33fe_count_i2c_clients(dev);
> +	if (ret < 0)
> +		return ret;
> +
> +	switch (ret) {
> +	case 2:
> +		return INT33FE_HW_TYPEB;
> +	case 4:
> +		return INT33FE_HW_TYPEC;
> +	default:
> +		return -ENODEV;
> +	}
> +}
> +
> +static int cht_int33fe_probe(struct platform_device *pdev)
> +{
> +	struct cht_int33fe_data *data;
> +	struct device *dev = &pdev->dev;
> +	int ret;
> +
> +	ret = cht_int33fe_check_hw_type(dev);
> +	if (ret < 0)
> +		return ret;
> +
> +	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
> +	if (!data)
> +		return -ENOMEM;
> +
> +	data->hw_type = ret;
> +	data->dev = dev;
> +
> +	switch (data->hw_type) {

I suggested adding hw_type to data so that it could be used to
select the right remove function in cht_int33fe_remove(),
since you are using a remove function pointer in data for this
(which is fine), there is no reason to store hw_type in
cht_int33fe_data anymore, please drop this and change the

	switch (data->hw_type) {

to:

	switch (ret) {


> +	case INT33FE_HW_TYPEB:
> +		data->probe = cht_int33fe_typeb_probe;
> +		data->remove = cht_int33fe_typeb_remove;
> +		break;
> +
> +	case INT33FE_HW_TYPEC:
> +		data->probe = cht_int33fe_typec_probe;
> +		data->remove = cht_int33fe_typec_remove;
> +		break;
> +	}
> +
> +	platform_set_drvdata(pdev, data);
> +
> +	return data->probe(data);
> +}
> +
> +static int cht_int33fe_remove(struct platform_device *pdev)
> +{
> +	struct cht_int33fe_data *data = platform_get_drvdata(pdev);
> +
> +	return data->remove(data);
> +}

<snip>

> diff --git a/drivers/platform/x86/intel_cht_int33fe_common.h b/drivers/platform/x86/intel_cht_int33fe_common.h
> new file mode 100644
> index 000000000000..cb0cc4552017
> --- /dev/null
> +++ b/drivers/platform/x86/intel_cht_int33fe_common.h
> @@ -0,0 +1,44 @@

<snip>

> +int cht_int33fe_typec_remove(struct cht_int33fe_data *data);
> +
> +#endif /* _INTEL_CHT_INT33FE_COMMON_H */
> +

Please drop the empty line at the end of intel_cht_int33fe_common.h .

> diff --git a/drivers/platform/x86/intel_cht_int33fe_typeb.c b/drivers/platform/x86/intel_cht_int33fe_typeb.c
> new file mode 100644
> index 000000000000..905c29f2f714
> --- /dev/null
> +++ b/drivers/platform/x86/intel_cht_int33fe_typeb.c
> @@ -0,0 +1,64 @@

<snip>

> +int cht_int33fe_typeb_remove(struct cht_int33fe_data *data)
> +{
> +	i2c_unregister_device(data->battery_fg);
> +
> +	return 0;
> +}
> +
> diff --git a/drivers/platform/x86/intel_cht_int33fe.c b/drivers/platform/x86/intel_cht_int33fe_typec.c

Please drop the empty line at the end of intel_cht_int33fe_typeb.c .

Regards,

Hans

p.s.

I've done the rebase myself and I'm building a kernel with my re-based version of this
patch to test it on a typec device. I will get back to you with the results
(I expect things will just work, just making sure).

Re: [PATCH v2 1/1] platform/x86/intel_cht_int33fe: Split code to USB TypeB and TypeC variants

[Heikki Krogerus]

On Tue, Sep 17, 2019 at 10:45:07PM +0300, Yauhen Kharuzhy wrote:
> Existing intel_cht_int33fe ACPI pseudo-device driver assumes that
> hardware has TypeC connector and register related devices described as
> I2C connections in the _CRS resource.
> 
> There is at least one hardware (Lenovo Yoga Book YB1-91L/F) with micro
> USB B connector exists. It has INT33FE device in the DSDT table but
> there are only two I2C connection described: PMIC and BQ27452 battery
> fuel gauge.
> 
> Splitting existing INT33FE driver allow to maintain code for USB type B
> (AB) connector variant separately and make it simpler.

Sorry, but "Type B" is even more confusing here. Type B refers to the
Standard-B USB connector, so _not_ the micro connector family. You can
check the connector definitions from the latest USB 3.2 specification.
The standard-b definition goes something like this:

        "The standard _Type-B_ connector defined by the USB x specification."

Note that all the five supported connectors are listed in ch5
"Mechanical":

        Standard-A
        Standard-B
        Micro-B
        Micro-AB
        Type-C

So what was the problem with names that refer to the micro connector
family, for example "micro-ab" or "micro-b"?


thanks,

-- 
heikki

Re: [PATCH v2 1/1] platform/x86/intel_cht_int33fe: Split code to USB TypeB and TypeC variants

[Yauhen Kharuzhy]

On Wed, Sep 18, 2019 at 11:20:21AM +0200, Hans de Goede wrote:
> Hi,
> 
> On 17-09-2019 21:45, Yauhen Kharuzhy wrote:
> > Existing intel_cht_int33fe ACPI pseudo-device driver assumes that
> > hardware has TypeC connector and register related devices described as
> > I2C connections in the _CRS resource.
> > 
> > There is at least one hardware (Lenovo Yoga Book YB1-91L/F) with micro
> > USB B connector exists. It has INT33FE device in the DSDT table but
> > there are only two I2C connection described: PMIC and BQ27452 battery
> > fuel gauge.
> > 
> > Splitting existing INT33FE driver allow to maintain code for USB type B
> > (AB) connector variant separately and make it simpler.
> > 
> > Split driver to intel_cht_int33fe_common.c and
> > intel_cht_int33fe_{typeb,typec}.c. Compile all this source to one .ko
> > module to make user experience easier.
> > 
> > Signed-off-by: Yauhen Kharuzhy <jekhor@gmail.com>
> 
> Thank you for doing this, this version looks much better IMHO.
> 
> Note that this does not apply to Linus' current master, please
> rebase. Specifically this conflicts with this patch:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=78cd4bf53635d3aeb73435bc89eb6eb39450f315
> 
> Which just got merged. Instead of rebasing on Linus' master
> (which is always a bit adventurous to use during the merge window)
> you can also cherry-pick that single commit on top of v5.3
> and use that as a base.
> 
> Note that that patch makes changes to struct cht_int33fe_data
> specifically it drops the:
> 
> 	struct fwnode_handle *mux;
> 
> Member, so when rebasing you should drop that in the new
> version of the struct on common.h .
> 
> Besides that this need a rebase, overall this looks good, I have some
> small remarks inline:

Arghh.. OK, I have rebased the patch but at current torvalds kernel
i2c_acpi_new_device() fails with -EPROBE_DEFER at my hw, so I cannot check if it
is fully working. But I will resend patch anyway soon, this error should
not be related to the patch content.

> > +	data->hw_type = ret;
> > +	data->dev = dev;
> > +
> > +	switch (data->hw_type) {
> 
> I suggested adding hw_type to data so that it could be used to
> select the right remove function in cht_int33fe_remove(),
> since you are using a remove function pointer in data for this
> (which is fine), there is no reason to store hw_type in
> cht_int33fe_data anymore, please drop this and change the
> 
> 	switch (data->hw_type) {
> 
> to:
> 
> 	switch (ret) {

OK, sure

> 
> p.s.
> 
> I've done the rebase myself and I'm building a kernel with my re-based version of this
> patch to test it on a typec device. I will get back to you with the results
> (I expect things will just work, just making sure).
> 

-- 
Yauhen Kharuzhy

Re: [PATCH v2 1/1] platform/x86/intel_cht_int33fe: Split code to USB TypeB and TypeC variants

[Yauhen Kharuzhy]

On Wed, Sep 18, 2019 at 02:38:35PM +0300, Heikki Krogerus wrote:
> On Tue, Sep 17, 2019 at 10:45:07PM +0300, Yauhen Kharuzhy wrote:
> > Existing intel_cht_int33fe ACPI pseudo-device driver assumes that
> > hardware has TypeC connector and register related devices described as
> > I2C connections in the _CRS resource.
> > 
> > There is at least one hardware (Lenovo Yoga Book YB1-91L/F) with micro
> > USB B connector exists. It has INT33FE device in the DSDT table but
> > there are only two I2C connection described: PMIC and BQ27452 battery
> > fuel gauge.
> > 
> > Splitting existing INT33FE driver allow to maintain code for USB type B
> > (AB) connector variant separately and make it simpler.
> 
> Sorry, but "Type B" is even more confusing here. Type B refers to the
> Standard-B USB connector, so _not_ the micro connector family. You can
> check the connector definitions from the latest USB 3.2 specification.
> The standard-b definition goes something like this:
> 
>         "The standard _Type-B_ connector defined by the USB x specification."
> 
> Note that all the five supported connectors are listed in ch5
> "Mechanical":
> 
>         Standard-A
>         Standard-B
>         Micro-B
>         Micro-AB
>         Type-C
> 
> So what was the problem with names that refer to the micro connector
> family, for example "micro-ab" or "micro-b"?

Only one problem: there is no difference between micro B, micro AB, mini
B or Standard-B types of connectors from this driver point of view – all
of them can be used for device charging. Now we have only two kind of
hardware with INT33FE pseudo-device: with Micro-B and Type-C connectors
but other kind may exist. TypeB is not standartized but it seemed to me
a good generalization of "USB connectors to charger connection but not
Type-C". No problem to change it to other suitable name, 'simple', 'dumb',
'non-TypeC' or 'micro-B'. All this names are not ideal.

-- 
Yauhen Kharuzhy

Re: [PATCH v2 1/1] platform/x86/intel_cht_int33fe: Split code to USB TypeB and TypeC variants

[Hans de Goede]

Hi,

On 18-09-2019 13:52, Yauhen Kharuzhy wrote:
> On Wed, Sep 18, 2019 at 02:38:35PM +0300, Heikki Krogerus wrote:
>> On Tue, Sep 17, 2019 at 10:45:07PM +0300, Yauhen Kharuzhy wrote:
>>> Existing intel_cht_int33fe ACPI pseudo-device driver assumes that
>>> hardware has TypeC connector and register related devices described as
>>> I2C connections in the _CRS resource.
>>>
>>> There is at least one hardware (Lenovo Yoga Book YB1-91L/F) with micro
>>> USB B connector exists. It has INT33FE device in the DSDT table but
>>> there are only two I2C connection described: PMIC and BQ27452 battery
>>> fuel gauge.
>>>
>>> Splitting existing INT33FE driver allow to maintain code for USB type B
>>> (AB) connector variant separately and make it simpler.
>>
>> Sorry, but "Type B" is even more confusing here. Type B refers to the
>> Standard-B USB connector, so _not_ the micro connector family. You can
>> check the connector definitions from the latest USB 3.2 specification.
>> The standard-b definition goes something like this:
>>
>>          "The standard _Type-B_ connector defined by the USB x specification."
>>
>> Note that all the five supported connectors are listed in ch5
>> "Mechanical":
>>
>>          Standard-A
>>          Standard-B
>>          Micro-B
>>          Micro-AB
>>          Type-C
>>
>> So what was the problem with names that refer to the micro connector
>> family, for example "micro-ab" or "micro-b"?
> 
> Only one problem: there is no difference between micro B, micro AB, mini
> B or Standard-B types of connectors from this driver point of view – all
> of them can be used for device charging. Now we have only two kind of
> hardware with INT33FE pseudo-device: with Micro-B and Type-C connectors
> but other kind may exist. TypeB is not standartized but it seemed to me
> a good generalization of "USB connectors to charger connection but not
> Type-C". No problem to change it to other suitable name, 'simple', 'dumb',
> 'non-TypeC' or 'micro-B'. All this names are not ideal.

Since the one non Type-C connector device we has has a micro-B I would just
call the file drivers/platform/x86/intel_cht_int33fe_microb.c and be done
with it.

Regards,

Hans

Re: [PATCH v2 1/1] platform/x86/intel_cht_int33fe: Split code to USB TypeB and TypeC variants

[Andy Shevchenko]

On Tue, Sep 17, 2019 at 10:45 PM Yauhen Kharuzhy <jekhor@gmail.com> wrote:
>
> Existing intel_cht_int33fe ACPI pseudo-device driver assumes that
> hardware has TypeC connector and register related devices described as
> I2C connections in the _CRS resource.
>
> There is at least one hardware (Lenovo Yoga Book YB1-91L/F) with micro
> USB B connector exists. It has INT33FE device in the DSDT table but
> there are only two I2C connection described: PMIC and BQ27452 battery
> fuel gauge.
>
> Splitting existing INT33FE driver allow to maintain code for USB type B
> (AB) connector variant separately and make it simpler.
>
> Split driver to intel_cht_int33fe_common.c and
> intel_cht_int33fe_{typeb,typec}.c. Compile all this source to one .ko
> module to make user experience easier.

Before sending new version also check that you spell correctly
"Type-C" everywhere (except variable / function names).


-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v2 1/1] platform/x86/intel_cht_int33fe: Split code to USB TypeB and TypeC variants

[Hans de Goede]

Hi,

On 18-09-2019 13:42, Yauhen Kharuzhy wrote:
> On Wed, Sep 18, 2019 at 11:20:21AM +0200, Hans de Goede wrote:
>> Hi,
>>
>> On 17-09-2019 21:45, Yauhen Kharuzhy wrote:
>>> Existing intel_cht_int33fe ACPI pseudo-device driver assumes that
>>> hardware has TypeC connector and register related devices described as
>>> I2C connections in the _CRS resource.
>>>
>>> There is at least one hardware (Lenovo Yoga Book YB1-91L/F) with micro
>>> USB B connector exists. It has INT33FE device in the DSDT table but
>>> there are only two I2C connection described: PMIC and BQ27452 battery
>>> fuel gauge.
>>>
>>> Splitting existing INT33FE driver allow to maintain code for USB type B
>>> (AB) connector variant separately and make it simpler.
>>>
>>> Split driver to intel_cht_int33fe_common.c and
>>> intel_cht_int33fe_{typeb,typec}.c. Compile all this source to one .ko
>>> module to make user experience easier.
>>>
>>> Signed-off-by: Yauhen Kharuzhy <jekhor@gmail.com>
>>
>> Thank you for doing this, this version looks much better IMHO.
>>
>> Note that this does not apply to Linus' current master, please
>> rebase. Specifically this conflicts with this patch:
>>
>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=78cd4bf53635d3aeb73435bc89eb6eb39450f315
>>
>> Which just got merged. Instead of rebasing on Linus' master
>> (which is always a bit adventurous to use during the merge window)
>> you can also cherry-pick that single commit on top of v5.3
>> and use that as a base.
>>
>> Note that that patch makes changes to struct cht_int33fe_data
>> specifically it drops the:
>>
>> 	struct fwnode_handle *mux;
>>
>> Member, so when rebasing you should drop that in the new
>> version of the struct on common.h .
>>
>> Besides that this need a rebase, overall this looks good, I have some
>> small remarks inline:
> 
> Arghh.. OK, I have rebased the patch but at current torvalds kernel
> i2c_acpi_new_device() fails with -EPROBE_DEFER at my hw, so I cannot check if it
> is fully working. But I will resend patch anyway soon, this error should
> not be related to the patch content.

Are you sure it is not working? -EPROBE_DEFER is normal(ish) it just means
that the i2c-controller driver for the bus has not initialized yet.

If you are building the i2c_designware or acpi_lpss drivers as module, or if
you are building the intel_cht_int33fe code into the kernel, then this
is more or less expected to happen.

You can do "ls /sys/bus/i2c/devices" to check if it did succeed on
later re-probe attempts (the fuel-gauge device should be there if
things succeeded).

And you should probably do one more version, suppressing the dev_err
on -EPROBE_DEFER like e.g. this snippet from the typec code:

         if (fusb302_irq < 0) {
                 if (fusb302_irq != -EPROBE_DEFER)
                         dev_err(dev, "Error getting FUSB302 irq\n");
                 return fusb302_irq;
         }

Regards,

Hans




> 
>>> +	data->hw_type = ret;
>>> +	data->dev = dev;
>>> +
>>> +	switch (data->hw_type) {
>>
>> I suggested adding hw_type to data so that it could be used to
>> select the right remove function in cht_int33fe_remove(),
>> since you are using a remove function pointer in data for this
>> (which is fine), there is no reason to store hw_type in
>> cht_int33fe_data anymore, please drop this and change the
>>
>> 	switch (data->hw_type) {
>>
>> to:
>>
>> 	switch (ret) {
> 
> OK, sure
> 
>>
>> p.s.
>>
>> I've done the rebase myself and I'm building a kernel with my re-based version of this
>> patch to test it on a typec device. I will get back to you with the results
>> (I expect things will just work, just making sure).
>>
> 

Re: [PATCH v2 1/1] platform/x86/intel_cht_int33fe: Split code to USB TypeB and TypeC variants

[Yauhen Kharuzhy]

On Wed, Sep 18, 2019 at 10:12:43PM +0200, Hans de Goede wrote:
> Hi,
> 
> On 18-09-2019 13:42, Yauhen Kharuzhy wrote:
> > On Wed, Sep 18, 2019 at 11:20:21AM +0200, Hans de Goede wrote:
> > > Hi,
> > > 
> > > On 17-09-2019 21:45, Yauhen Kharuzhy wrote:
> > > > Existing intel_cht_int33fe ACPI pseudo-device driver assumes that
> > > > hardware has TypeC connector and register related devices described as
> > > > I2C connections in the _CRS resource.
> > > > 
> > > > There is at least one hardware (Lenovo Yoga Book YB1-91L/F) with micro
> > > > USB B connector exists. It has INT33FE device in the DSDT table but
> > > > there are only two I2C connection described: PMIC and BQ27452 battery
> > > > fuel gauge.
> > > > 
> > > > Splitting existing INT33FE driver allow to maintain code for USB type B
> > > > (AB) connector variant separately and make it simpler.
> > > > 
> > > > Split driver to intel_cht_int33fe_common.c and
> > > > intel_cht_int33fe_{typeb,typec}.c. Compile all this source to one .ko
> > > > module to make user experience easier.
> > > > 
> > > > Signed-off-by: Yauhen Kharuzhy <jekhor@gmail.com>
> > > 
> > > Thank you for doing this, this version looks much better IMHO.
> > > 
> > > Note that this does not apply to Linus' current master, please
> > > rebase. Specifically this conflicts with this patch:
> > > 
> > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=78cd4bf53635d3aeb73435bc89eb6eb39450f315
> > > 
> > > Which just got merged. Instead of rebasing on Linus' master
> > > (which is always a bit adventurous to use during the merge window)
> > > you can also cherry-pick that single commit on top of v5.3
> > > and use that as a base.
> > > 
> > > Note that that patch makes changes to struct cht_int33fe_data
> > > specifically it drops the:
> > > 
> > > 	struct fwnode_handle *mux;
> > > 
> > > Member, so when rebasing you should drop that in the new
> > > version of the struct on common.h .
> > > 
> > > Besides that this need a rebase, overall this looks good, I have some
> > > small remarks inline:
> > 
> > Arghh.. OK, I have rebased the patch but at current torvalds kernel
> > i2c_acpi_new_device() fails with -EPROBE_DEFER at my hw, so I cannot check if it
> > is fully working. But I will resend patch anyway soon, this error should
> > not be related to the patch content.
> 
> Are you sure it is not working? -EPROBE_DEFER is normal(ish) it just means
> that the i2c-controller driver for the bus has not initialized yet.
> 
> If you are building the i2c_designware or acpi_lpss drivers as module, or if
> you are building the intel_cht_int33fe code into the kernel, then this
> is more or less expected to happen.

I would agree but i2cdetect/i2cget works for this bus as expected. I
remember that I met this bug at one of previous iterations, hm... As I remember
it was caused by this commit:
00500147cbd3fc51353d0d003eaa9d31c72c0d50 drivers: Introduce device lookup variants by ACPI_COMPANION device.

This needs to be investigated.

> You can do "ls /sys/bus/i2c/devices" to check if it did succeed on
> later re-probe attempts (the fuel-gauge device should be there if
> things succeeded).
> 
> And you should probably do one more version, suppressing the dev_err
> on -EPROBE_DEFER like e.g. this snippet from the typec code:

OK, -EPROBE_DEFER was unexpected here for me...

 

-- 
Yauhen Kharuzhy

Re: [PATCH v2 1/1] platform/x86/intel_cht_int33fe: Split code to USB TypeB and TypeC variants

[Yauhen Kharuzhy]

On Wed, Sep 18, 2019 at 11:33:32PM +0300, Yauhen Kharuzhy wrote:
> On Wed, Sep 18, 2019 at 10:12:43PM +0200, Hans de Goede wrote:
> > Hi,
> > 
> > On 18-09-2019 13:42, Yauhen Kharuzhy wrote:
> > > On Wed, Sep 18, 2019 at 11:20:21AM +0200, Hans de Goede wrote:
> > > > Hi,
> > > > 
> > > > On 17-09-2019 21:45, Yauhen Kharuzhy wrote:
> > > > > Existing intel_cht_int33fe ACPI pseudo-device driver assumes that
> > > > > hardware has TypeC connector and register related devices described as
> > > > > I2C connections in the _CRS resource.
> > > > > 
> > > > > There is at least one hardware (Lenovo Yoga Book YB1-91L/F) with micro
> > > > > USB B connector exists. It has INT33FE device in the DSDT table but
> > > > > there are only two I2C connection described: PMIC and BQ27452 battery
> > > > > fuel gauge.
> > > > > 
> > > > > Splitting existing INT33FE driver allow to maintain code for USB type B
> > > > > (AB) connector variant separately and make it simpler.
> > > > > 
> > > > > Split driver to intel_cht_int33fe_common.c and
> > > > > intel_cht_int33fe_{typeb,typec}.c. Compile all this source to one .ko
> > > > > module to make user experience easier.
> > > > > 
> > > > > Signed-off-by: Yauhen Kharuzhy <jekhor@gmail.com>
> > > > 
> > > > Thank you for doing this, this version looks much better IMHO.
> > > > 
> > > > Note that this does not apply to Linus' current master, please
> > > > rebase. Specifically this conflicts with this patch:
> > > > 
> > > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=78cd4bf53635d3aeb73435bc89eb6eb39450f315
> > > > 
> > > > Which just got merged. Instead of rebasing on Linus' master
> > > > (which is always a bit adventurous to use during the merge window)
> > > > you can also cherry-pick that single commit on top of v5.3
> > > > and use that as a base.
> > > > 
> > > > Note that that patch makes changes to struct cht_int33fe_data
> > > > specifically it drops the:
> > > > 
> > > > 	struct fwnode_handle *mux;
> > > > 
> > > > Member, so when rebasing you should drop that in the new
> > > > version of the struct on common.h .
> > > > 
> > > > Besides that this need a rebase, overall this looks good, I have some
> > > > small remarks inline:
> > > 
> > > Arghh.. OK, I have rebased the patch but at current torvalds kernel
> > > i2c_acpi_new_device() fails with -EPROBE_DEFER at my hw, so I cannot check if it
> > > is fully working. But I will resend patch anyway soon, this error should
> > > not be related to the patch content.
> > 
> > Are you sure it is not working? -EPROBE_DEFER is normal(ish) it just means
> > that the i2c-controller driver for the bus has not initialized yet.
> > 
> > If you are building the i2c_designware or acpi_lpss drivers as module, or if
> > you are building the intel_cht_int33fe code into the kernel, then this
> > is more or less expected to happen.
> 
> I would agree but i2cdetect/i2cget works for this bus as expected. I
> remember that I met this bug at one of previous iterations, hm... As I remember
> it was caused by this commit:
> 00500147cbd3fc51353d0d003eaa9d31c72c0d50 drivers: Introduce device lookup variants by ACPI_COMPANION device.
> 
> This needs to be investigated.

It was reverted by commit merged today, so it is not an issue anymore:

commit 644bf60088955421051e716ab9c8fe7fb7997fd7
Author: Suzuki K Poulose <suzuki.poulose@arm.com>
Date:   Thu Aug 1 11:20:24 2019 +0100

    i2c: Revert incorrect conversion to use generic helper



> > You can do "ls /sys/bus/i2c/devices" to check if it did succeed on
> > later re-probe attempts (the fuel-gauge device should be there if
> > things succeeded).
> > 
> > And you should probably do one more version, suppressing the dev_err
> > on -EPROBE_DEFER like e.g. this snippet from the typec code:
> 
> OK, -EPROBE_DEFER was unexpected here for me...
> 
>  
> 
> -- 
> Yauhen Kharuzhy

-- 
Yauhen Kharuzhy