Merge tag 'platform-drivers-x86-v6.10-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86

torvalds · torvalds · commit 96e09b8f8166 · 2024-06-07T14:13:46.000-07:00
Pull x86 platform driver fixes from Hans de Goede:

 -  Default silead touchscreen driver to 10 fingers and drop 10 finger
    setting from all DMI quirks. More of a cleanup then a pure fix, but
    since the DMI quirks always get updated through the fixes branch
    this avoids conflicts.

 -  Kconfig fix for randconfig builds

 -  dell-smbios: Fix wrong token data in sysfs

 -  amd-hsmp: Fix driver poking unsupported hw when loaded manually

* tag 'platform-drivers-x86-v6.10-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86:
  platform/x86/amd/hsmp: Check HSMP support on AMD family of processors
  platform/x86: dell-smbios: Simplify error handling
  platform/x86: dell-smbios: Fix wrong token data in sysfs
  platform/x86: yt2-1380: add CONFIG_EXTCON dependency
  platform/x86: touchscreen_dmi: Use 2-argument strscpy()
  platform/x86: touchscreen_dmi: Drop "silead,max-fingers" property
  Input: silead - Always support 10 fingers
diff --git a/drivers/input/touchscreen/silead.c b/drivers/input/touchscreen/silead.c
@@ -71,7 +71,6 @@ struct silead_ts_data {
 	struct regulator_bulk_data regulators[2];
 	char fw_name[64];
 	struct touchscreen_properties prop;
-	u32 max_fingers;
 	u32 chip_id;
 	struct input_mt_pos pos[SILEAD_MAX_FINGERS];
 	int slots[SILEAD_MAX_FINGERS];
@@ -136,7 +135,7 @@ static int silead_ts_request_input_dev(struct silead_ts_data *data)
 	touchscreen_parse_properties(data->input, true, &data->prop);
 	silead_apply_efi_fw_min_max(data);
 
-	input_mt_init_slots(data->input, data->max_fingers,
+	input_mt_init_slots(data->input, SILEAD_MAX_FINGERS,
 			    INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED |
 			    INPUT_MT_TRACK);
 
@@ -256,10 +255,10 @@ static void silead_ts_read_data(struct i2c_client *client)
 		return;
 	}
 
-	if (buf[0] > data->max_fingers) {
+	if (buf[0] > SILEAD_MAX_FINGERS) {
 		dev_warn(dev, "More touches reported then supported %d > %d\n",
-			 buf[0], data->max_fingers);
-		buf[0] = data->max_fingers;
+			 buf[0], SILEAD_MAX_FINGERS);
+		buf[0] = SILEAD_MAX_FINGERS;
 	}
 
 	if (silead_ts_handle_pen_data(data, buf))
@@ -315,7 +314,6 @@ static void silead_ts_read_data(struct i2c_client *client)
 
 static int silead_ts_init(struct i2c_client *client)
 {
-	struct silead_ts_data *data = i2c_get_clientdata(client);
 	int error;
 
 	error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET,
@@ -325,7 +323,7 @@ static int silead_ts_init(struct i2c_client *client)
 	usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
 
 	error = i2c_smbus_write_byte_data(client, SILEAD_REG_TOUCH_NR,
-					data->max_fingers);
+					  SILEAD_MAX_FINGERS);
 	if (error)
 		goto i2c_write_err;
 	usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
@@ -591,13 +589,6 @@ static void silead_ts_read_props(struct i2c_client *client)
 	const char *str;
 	int error;
 
-	error = device_property_read_u32(dev, "silead,max-fingers",
-					 &data->max_fingers);
-	if (error) {
-		dev_dbg(dev, "Max fingers read error %d\n", error);
-		data->max_fingers = 5; /* Most devices handle up-to 5 fingers */
-	}
-
 	error = device_property_read_string(dev, "firmware-name", &str);
 	if (!error)
 		snprintf(data->fw_name, sizeof(data->fw_name),
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
@@ -136,6 +136,7 @@ config YOGABOOK
 config YT2_1380
 	tristate "Lenovo Yoga Tablet 2 1380 fast charge driver"
 	depends on SERIAL_DEV_BUS
+	depends on EXTCON
 	depends on ACPI
 	help
 	  Say Y here to enable support for the custom fast charging protocol
diff --git a/drivers/platform/x86/amd/hsmp.c b/drivers/platform/x86/amd/hsmp.c
@@ -907,16 +907,44 @@ static int hsmp_plat_dev_register(void)
 	return ret;
 }
 
+/*
+ * This check is only needed for backward compatibility of previous platforms.
+ * All new platforms are expected to support ACPI based probing.
+ */
+static bool legacy_hsmp_support(void)
+{
+	if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
+		return false;
+
+	switch (boot_cpu_data.x86) {
+	case 0x19:
+		switch (boot_cpu_data.x86_model) {
+		case 0x00 ... 0x1F:
+		case 0x30 ... 0x3F:
+		case 0x90 ... 0x9F:
+		case 0xA0 ... 0xAF:
+			return true;
+		default:
+			return false;
+		}
+	case 0x1A:
+		switch (boot_cpu_data.x86_model) {
+		case 0x00 ... 0x1F:
+			return true;
+		default:
+			return false;
+		}
+	default:
+		return false;
+	}
+
+	return false;
+}
+
 static int __init hsmp_plt_init(void)
 {
 	int ret = -ENODEV;
 
-	if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD || boot_cpu_data.x86 < 0x19) {
-		pr_err("HSMP is not supported on Family:%x model:%x\n",
-		       boot_cpu_data.x86, boot_cpu_data.x86_model);
-		return ret;
-	}
-
 	/*
 	 * amd_nb_num() returns number of SMN/DF interfaces present in the system
 	 * if we have N SMN/DF interfaces that ideally means N sockets
@@ -930,7 +958,15 @@ static int __init hsmp_plt_init(void)
 		return ret;
 
 	if (!plat_dev.is_acpi_device) {
-		ret = hsmp_plat_dev_register();
+		if (legacy_hsmp_support()) {
+			/* Not ACPI device, but supports HSMP, register a plat_dev */
+			ret = hsmp_plat_dev_register();
+		} else {
+			/* Not ACPI, Does not support HSMP */
+			pr_info("HSMP is not supported on Family:%x model:%x\n",
+				boot_cpu_data.x86, boot_cpu_data.x86_model);
+			ret = -ENODEV;
+		}
 		if (ret)
 			platform_driver_unregister(&amd_hsmp_driver);
 	}
diff --git a/drivers/platform/x86/dell/dell-smbios-base.c b/drivers/platform/x86/dell/dell-smbios-base.c
@@ -11,6 +11,7 @@
  */
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
+#include <linux/container_of.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/capability.h>
@@ -25,11 +26,16 @@ static u32 da_supported_commands;
 static int da_num_tokens;
 static struct platform_device *platform_device;
 static struct calling_interface_token *da_tokens;
-static struct device_attribute *token_location_attrs;
-static struct device_attribute *token_value_attrs;
+static struct token_sysfs_data *token_entries;
 static struct attribute **token_attrs;
 static DEFINE_MUTEX(smbios_mutex);
 
+struct token_sysfs_data {
+	struct device_attribute location_attr;
+	struct device_attribute value_attr;
+	struct calling_interface_token *token;
+};
+
 struct smbios_device {
 	struct list_head list;
 	struct device *device;
@@ -416,47 +422,26 @@ static void __init find_tokens(const struct dmi_header *dm, void *dummy)
 	}
 }
 
-static int match_attribute(struct device *dev,
-			   struct device_attribute *attr)
-{
-	int i;
-
-	for (i = 0; i < da_num_tokens * 2; i++) {
-		if (!token_attrs[i])
-			continue;
-		if (strcmp(token_attrs[i]->name, attr->attr.name) == 0)
-			return i/2;
-	}
-	dev_dbg(dev, "couldn't match: %s\n", attr->attr.name);
-	return -EINVAL;
-}
-
 static ssize_t location_show(struct device *dev,
 			     struct device_attribute *attr, char *buf)
 {
-	int i;
+	struct token_sysfs_data *data = container_of(attr, struct token_sysfs_data, location_attr);
 
 	if (!capable(CAP_SYS_ADMIN))
 		return -EPERM;
 
-	i = match_attribute(dev, attr);
-	if (i > 0)
-		return sysfs_emit(buf, "%08x", da_tokens[i].location);
-	return 0;
+	return sysfs_emit(buf, "%08x", data->token->location);
 }
 
 static ssize_t value_show(struct device *dev,
 			  struct device_attribute *attr, char *buf)
 {
-	int i;
+	struct token_sysfs_data *data = container_of(attr, struct token_sysfs_data, value_attr);
 
 	if (!capable(CAP_SYS_ADMIN))
 		return -EPERM;
 
-	i = match_attribute(dev, attr);
-	if (i > 0)
-		return sysfs_emit(buf, "%08x", da_tokens[i].value);
-	return 0;
+	return sysfs_emit(buf, "%08x", data->token->value);
 }
 
 static struct attribute_group smbios_attribute_group = {
@@ -473,55 +458,50 @@ static int build_tokens_sysfs(struct platform_device *dev)
 {
 	char *location_name;
 	char *value_name;
-	size_t size;
 	int ret;
 	int i, j;
 
-	/* (number of tokens  + 1 for null terminated */
-	size = sizeof(struct device_attribute) * (da_num_tokens + 1);
-	token_location_attrs = kzalloc(size, GFP_KERNEL);
-	if (!token_location_attrs)
+	token_entries = kcalloc(da_num_tokens, sizeof(*token_entries), GFP_KERNEL);
+	if (!token_entries)
 		return -ENOMEM;
-	token_value_attrs = kzalloc(size, GFP_KERNEL);
-	if (!token_value_attrs)
-		goto out_allocate_value;
 
 	/* need to store both location and value + terminator*/
-	size = sizeof(struct attribute *) * ((2 * da_num_tokens) + 1);
-	token_attrs = kzalloc(size, GFP_KERNEL);
+	token_attrs = kcalloc((2 * da_num_tokens) + 1, sizeof(*token_attrs), GFP_KERNEL);
 	if (!token_attrs)
 		goto out_allocate_attrs;
 
 	for (i = 0, j = 0; i < da_num_tokens; i++) {
 		/* skip empty */
 		if (da_tokens[i].tokenID == 0)
 			continue;
+
+		token_entries[i].token = &da_tokens[i];
+
 		/* add location */
 		location_name = kasprintf(GFP_KERNEL, "%04x_location",
 					  da_tokens[i].tokenID);
 		if (location_name == NULL)
 			goto out_unwind_strings;
-		sysfs_attr_init(&token_location_attrs[i].attr);
-		token_location_attrs[i].attr.name = location_name;
-		token_location_attrs[i].attr.mode = 0444;
-		token_location_attrs[i].show = location_show;
-		token_attrs[j++] = &token_location_attrs[i].attr;
+
+		sysfs_attr_init(&token_entries[i].location_attr.attr);
+		token_entries[i].location_attr.attr.name = location_name;
+		token_entries[i].location_attr.attr.mode = 0444;
+		token_entries[i].location_attr.show = location_show;
+		token_attrs[j++] = &token_entries[i].location_attr.attr;
 
 		/* add value */
 		value_name = kasprintf(GFP_KERNEL, "%04x_value",
 				       da_tokens[i].tokenID);
-		if (value_name == NULL)
-			goto loop_fail_create_value;
-		sysfs_attr_init(&token_value_attrs[i].attr);
-		token_value_attrs[i].attr.name = value_name;
-		token_value_attrs[i].attr.mode = 0444;
-		token_value_attrs[i].show = value_show;
-		token_attrs[j++] = &token_value_attrs[i].attr;
-		continue;
-
-loop_fail_create_value:
-		kfree(location_name);
-		goto out_unwind_strings;
+		if (!value_name) {
+			kfree(location_name);
+			goto out_unwind_strings;
+		}
+
+		sysfs_attr_init(&token_entries[i].value_attr.attr);
+		token_entries[i].value_attr.attr.name = value_name;
+		token_entries[i].value_attr.attr.mode = 0444;
+		token_entries[i].value_attr.show = value_show;
+		token_attrs[j++] = &token_entries[i].value_attr.attr;
 	}
 	smbios_attribute_group.attrs = token_attrs;
 
@@ -532,14 +512,12 @@ static int build_tokens_sysfs(struct platform_device *dev)
 
 out_unwind_strings:
 	while (i--) {
-		kfree(token_location_attrs[i].attr.name);
-		kfree(token_value_attrs[i].attr.name);
+		kfree(token_entries[i].location_attr.attr.name);
+		kfree(token_entries[i].value_attr.attr.name);
 	}
 	kfree(token_attrs);
 out_allocate_attrs:
-	kfree(token_value_attrs);
-out_allocate_value:
-	kfree(token_location_attrs);
+	kfree(token_entries);
 
 	return -ENOMEM;
 }
@@ -551,12 +529,11 @@ static void free_group(struct platform_device *pdev)
 	sysfs_remove_group(&pdev->dev.kobj,
 				&smbios_attribute_group);
 	for (i = 0; i < da_num_tokens; i++) {
-		kfree(token_location_attrs[i].attr.name);
-		kfree(token_value_attrs[i].attr.name);
+		kfree(token_entries[i].location_attr.attr.name);
+		kfree(token_entries[i].value_attr.attr.name);
 	}
 	kfree(token_attrs);
-	kfree(token_value_attrs);
-	kfree(token_location_attrs);
+	kfree(token_entries);
 }
 
 static int __init dell_smbios_init(void)
diff --git a/drivers/platform/x86/touchscreen_dmi.c b/drivers/platform/x86/touchscreen_dmi.c
