Merge branch 'ib-chrome-platform-atmel-mxt-ts-device-properties' into working-branch-for-4.18 (1eb89893) · Commits · github.com / kvm-riscv / linux

drivers/platform/chrome/chromeos_laptop.c

+278 −29

Original line number	Diff line number	Diff line
		@@ -6,6 +6,7 @@

		#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

		#include <linux/acpi.h>
		#include <linux/dmi.h>
		#include <linux/i2c.h>
		#include <linux/input.h>
		@@ -54,6 +55,11 @@ struct i2c_peripheral {
		struct i2c_client *client;
		};

		struct acpi_peripheral {
		char hid[ACPI_ID_LEN];
		const struct property_entry *properties;
		};

		struct chromeos_laptop {
		/*
		* Note that we can't mark this pointer as const because
		@@ -61,6 +67,9 @@ struct chromeos_laptop {
		*/
		struct i2c_peripheral *i2c_peripherals;
		unsigned int num_i2c_peripherals;

		const struct acpi_peripheral *acpi_peripherals;
		unsigned int num_acpi_peripherals;
		};

		static const struct chromeos_laptop *cros_laptop;
		@@ -148,6 +157,38 @@ static void chromeos_laptop_check_adapter(struct i2c_adapter *adapter)
		}
		}

		static bool chromeos_laptop_adjust_client(struct i2c_client *client)
		{
		const struct acpi_peripheral *acpi_dev;
		struct acpi_device_id acpi_ids[2] = { };
		int i;
		int error;

		if (!has_acpi_companion(&client->dev))
		return false;

		for (i = 0; i < cros_laptop->num_acpi_peripherals; i++) {
		acpi_dev = &cros_laptop->acpi_peripherals[i];

		memcpy(acpi_ids[0].id, acpi_dev->hid, ACPI_ID_LEN);

		if (acpi_match_device(acpi_ids, &client->dev)) {
		error = device_add_properties(&client->dev,
		acpi_dev->properties);
		if (error) {
		dev_err(&client->dev,
		"failed to add properties: %d\n",
		error);
		break;
		}

		return true;
		}
		}

		return false;
		}

		static void chromeos_laptop_detach_i2c_client(struct i2c_client *client)
		{
		struct i2c_peripheral *i2c_dev;
		@@ -170,6 +211,8 @@ static int chromeos_laptop_i2c_notifier_call(struct notifier_block *nb,
		case BUS_NOTIFY_ADD_DEVICE:
		if (dev->type == &i2c_adapter_type)
		chromeos_laptop_check_adapter(to_i2c_adapter(dev));
		else if (dev->type == &i2c_client_type)
		chromeos_laptop_adjust_client(to_i2c_client(dev));
		break;

		case BUS_NOTIFY_REMOVED_DEVICE:
		@@ -191,6 +234,12 @@ static const struct chromeos_laptop _name __initconst = { \
		.num_i2c_peripherals = ARRAY_SIZE(_name##_peripherals), \
		}

		#define DECLARE_ACPI_CROS_LAPTOP(_name) \
		static const struct chromeos_laptop _name __initconst = { \
		.acpi_peripherals = _name##_peripherals, \
		.num_acpi_peripherals = ARRAY_SIZE(_name##_peripherals), \
		}

		static struct i2c_peripheral samsung_series_5_550_peripherals[] __initdata = {
		/* Touchpad. */
		{
		@@ -234,16 +283,25 @@ static const int chromebook_pixel_tp_keys[] __initconst = {

		static const struct property_entry
		chromebook_pixel_trackpad_props[] __initconst = {
		PROPERTY_ENTRY_STRING("compatible", "atmel,maxtouch"),
		PROPERTY_ENTRY_U32_ARRAY("linux,gpio-keymap", chromebook_pixel_tp_keys),
		{ }
		};

		static const struct property_entry
		chromebook_atmel_touchscreen_props[] __initconst = {
		PROPERTY_ENTRY_STRING("compatible", "atmel,maxtouch"),
		{ }
		};

		static struct i2c_peripheral chromebook_pixel_peripherals[] __initdata = {
		/* Touch Screen. */
		{
		.board_info = {
		I2C_BOARD_INFO("atmel_mxt_ts",
		ATMEL_TS_I2C_ADDR),
		.properties =
		chromebook_atmel_touchscreen_props,
		.flags = I2C_CLIENT_WAKE,
		},
		.dmi_name = "touchscreen",
		@@ -354,6 +412,8 @@ static struct i2c_peripheral acer_c720_peripherals[] __initdata = {
		.board_info = {
		I2C_BOARD_INFO("atmel_mxt_ts",
		ATMEL_TS_I2C_ADDR),
		.properties =
		chromebook_atmel_touchscreen_props,
		.flags = I2C_CLIENT_WAKE,
		},
		.dmi_name = "touchscreen",
		@@ -419,6 +479,47 @@ static struct i2c_peripheral cr48_peripherals[] __initdata = {
		};
		DECLARE_CROS_LAPTOP(cr48);

		static const u32 samus_touchpad_buttons[] __initconst = {
		KEY_RESERVED,
		KEY_RESERVED,
		KEY_RESERVED,
		BTN_LEFT
		};

		static const struct property_entry samus_trackpad_props[] __initconst = {
		PROPERTY_ENTRY_STRING("compatible", "atmel,maxtouch"),
		PROPERTY_ENTRY_U32_ARRAY("linux,gpio-keymap", samus_touchpad_buttons),
		{ }
		};

		static struct acpi_peripheral samus_peripherals[] __initdata = {
		/* Touchpad */
		{
		.hid = "ATML0000",
		.properties = samus_trackpad_props,
		},
		/* Touchsceen */
		{
		.hid = "ATML0001",
		.properties = chromebook_atmel_touchscreen_props,
		},
		};
		DECLARE_ACPI_CROS_LAPTOP(samus);

		static struct acpi_peripheral generic_atmel_peripherals[] __initdata = {
		/* Touchpad */
		{
		.hid = "ATML0000",
		.properties = chromebook_pixel_trackpad_props,
		},
		/* Touchsceen */
		{
		.hid = "ATML0001",
		.properties = chromebook_atmel_touchscreen_props,
		},
		};
		DECLARE_ACPI_CROS_LAPTOP(generic_atmel);

		static const struct dmi_system_id chromeos_laptop_dmi_table[] __initconst = {
		{
		.ident = "Samsung Series 5 550",
		@@ -502,17 +603,64 @@ static const struct dmi_system_id chromeos_laptop_dmi_table[] __initconst = {
		},
		.driver_data = (void *)&cr48,
		},
		/* Devices with peripherals incompletely described in ACPI */
		{
		.ident = "Chromebook Pro",
		.matches = {
		DMI_MATCH(DMI_SYS_VENDOR, "Google"),
		DMI_MATCH(DMI_PRODUCT_NAME, "Caroline"),
		},
		.driver_data = (void *)&samus,
		},
		{
		.ident = "Google Pixel 2 (2015)",
		.matches = {
		DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
		DMI_MATCH(DMI_PRODUCT_NAME, "Samus"),
		},
		.driver_data = (void *)&samus,
		},
		{
		/*
		* Other Chromebooks with Atmel touch controllers:
		* - Celes, Winky (touchpad)
		* - Clapper, Expresso, Rambi, Glimmer (touchscreen)
		*/
		.ident = "Other Chromebook",
		.matches = {
		/*
		* This will match all Google devices, not only devices
		* with Atmel, but we will validate that the device
		* actually has matching peripherals.
		*/
		DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
		},
		.driver_data = (void *)&generic_atmel,
		},
		{ }
		};
		MODULE_DEVICE_TABLE(dmi, chromeos_laptop_dmi_table);

		static int __init chromeos_laptop_scan_adapter(struct device dev, void data)
		static int __init chromeos_laptop_scan_peripherals(struct device dev, void data)
		{
		struct i2c_adapter *adapter;
		int error;

		adapter = i2c_verify_adapter(dev);
		if (adapter)
		chromeos_laptop_check_adapter(adapter);
		if (dev->type == &i2c_adapter_type) {
		chromeos_laptop_check_adapter(to_i2c_adapter(dev));
		} else if (dev->type == &i2c_client_type) {
		if (chromeos_laptop_adjust_client(to_i2c_client(dev))) {
		/*
		* Now that we have needed properties re-trigger
		* driver probe in case driver was initialized
		* earlier and probe failed.
		*/
		error = device_attach(dev);
		if (error < 0)
		dev_warn(dev,
		"%s: device_attach() failed: %d\n",
		__func__, error);
		}
		}

		return 0;
		}
		@@ -556,27 +704,24 @@ static int __init chromeos_laptop_setup_irq(struct i2c_peripheral *i2c_dev)
		return 0;
		}

		static struct chromeos_laptop * __init
		chromeos_laptop_prepare(const struct chromeos_laptop *src)
		static int __init
		chromeos_laptop_prepare_i2c_peripherals(struct chromeos_laptop *cros_laptop,
		const struct chromeos_laptop *src)
		{
		struct chromeos_laptop *cros_laptop;
		struct i2c_peripheral *i2c_dev;
		struct i2c_board_info *info;
		int error;
		int i;
		int error;

		cros_laptop = kzalloc(sizeof(*cros_laptop), GFP_KERNEL);
		if (!cros_laptop)
		return ERR_PTR(-ENOMEM);
		if (!src->num_i2c_peripherals)
		return 0;

		cros_laptop->i2c_peripherals = kmemdup(src->i2c_peripherals,
		src->num_i2c_peripherals *
		sizeof(*src->i2c_peripherals),
		GFP_KERNEL);
		if (!cros_laptop->i2c_peripherals) {
		error = -ENOMEM;
		goto err_free_cros_laptop;
		}
		if (!cros_laptop->i2c_peripherals)
		return -ENOMEM;

		cros_laptop->num_i2c_peripherals = src->num_i2c_peripherals;

		@@ -586,7 +731,7 @@ chromeos_laptop_prepare(const struct chromeos_laptop *src)

		error = chromeos_laptop_setup_irq(i2c_dev);
		if (error)
		goto err_destroy_cros_peripherals;
		goto err_out;

		/* We need to deep-copy properties */
		if (info->properties) {
		@@ -594,14 +739,14 @@ chromeos_laptop_prepare(const struct chromeos_laptop *src)
		property_entries_dup(info->properties);
		if (IS_ERR(info->properties)) {
		error = PTR_ERR(info->properties);
		goto err_destroy_cros_peripherals;
		goto err_out;
		}
		}
		}

		return cros_laptop;
		return 0;

		err_destroy_cros_peripherals:
		err_out:
		while (--i >= 0) {
		i2c_dev = &cros_laptop->i2c_peripherals[i];
		info = &i2c_dev->board_info;
		@@ -609,13 +754,74 @@ chromeos_laptop_prepare(const struct chromeos_laptop *src)
		property_entries_free(info->properties);
		}
		kfree(cros_laptop->i2c_peripherals);
		err_free_cros_laptop:
		kfree(cros_laptop);
		return ERR_PTR(error);
		return error;
		}

		static int __init
		chromeos_laptop_prepare_acpi_peripherals(struct chromeos_laptop *cros_laptop,
		const struct chromeos_laptop *src)
		{
		struct acpi_peripheral *acpi_peripherals;
		struct acpi_peripheral *acpi_dev;
		const struct acpi_peripheral *src_dev;
		int n_peripherals = 0;
		int i;
		int error;

		for (i = 0; i < src->num_acpi_peripherals; i++) {
		if (acpi_dev_present(src->acpi_peripherals[i].hid, NULL, -1))
		n_peripherals++;
		}

		if (!n_peripherals)
		return 0;

		acpi_peripherals = kcalloc(n_peripherals,
		sizeof(*src->acpi_peripherals),
		GFP_KERNEL);
		if (!acpi_peripherals)
		return -ENOMEM;

		acpi_dev = acpi_peripherals;
		for (i = 0; i < src->num_acpi_peripherals; i++) {
		src_dev = &src->acpi_peripherals[i];
		if (!acpi_dev_present(src_dev->hid, NULL, -1))
		continue;

		acpi_dev = src_dev;

		/* We need to deep-copy properties */
		if (src_dev->properties) {
		acpi_dev->properties =
		property_entries_dup(src_dev->properties);
		if (IS_ERR(acpi_dev->properties)) {
		error = PTR_ERR(acpi_dev->properties);
		goto err_out;
		}
		}

		acpi_dev++;
		}

		cros_laptop->acpi_peripherals = acpi_peripherals;
		cros_laptop->num_acpi_peripherals = n_peripherals;

		return 0;

		err_out:
		while (--i >= 0) {
		acpi_dev = &acpi_peripherals[i];
		if (acpi_dev->properties)
		property_entries_free(acpi_dev->properties);
		}

		kfree(acpi_peripherals);
		return error;
		}

		static void chromeos_laptop_destroy(const struct chromeos_laptop *cros_laptop)
		{
		const struct acpi_peripheral *acpi_dev;
		struct i2c_peripheral *i2c_dev;
		struct i2c_board_info *info;
		int i;
		@@ -631,10 +837,41 @@ static void chromeos_laptop_destroy(const struct chromeos_laptop *cros_laptop)
		property_entries_free(info->properties);
		}

		for (i = 0; i < cros_laptop->num_acpi_peripherals; i++) {
		acpi_dev = &cros_laptop->acpi_peripherals[i];

		if (acpi_dev->properties)
		property_entries_free(acpi_dev->properties);
		}

		kfree(cros_laptop->i2c_peripherals);
		kfree(cros_laptop->acpi_peripherals);
		kfree(cros_laptop);
		}

		static struct chromeos_laptop * __init
		chromeos_laptop_prepare(const struct chromeos_laptop *src)
		{
		struct chromeos_laptop *cros_laptop;
		int error;

		cros_laptop = kzalloc(sizeof(*cros_laptop), GFP_KERNEL);
		if (!cros_laptop)
		return ERR_PTR(-ENOMEM);

		error = chromeos_laptop_prepare_i2c_peripherals(cros_laptop, src);
		if (!error)
		error = chromeos_laptop_prepare_acpi_peripherals(cros_laptop,
		src);

		if (error) {
		chromeos_laptop_destroy(cros_laptop);
		return ERR_PTR(error);
		}

		return cros_laptop;
		}

		static int __init chromeos_laptop_init(void)
		{
		const struct dmi_system_id *dmi_id;
		@@ -652,21 +889,33 @@ static int __init chromeos_laptop_init(void)
		if (IS_ERR(cros_laptop))
		return PTR_ERR(cros_laptop);

		if (!cros_laptop->num_i2c_peripherals &&
		!cros_laptop->num_acpi_peripherals) {
		pr_debug("no relevant devices detected\n");
		error = -ENODEV;
		goto err_destroy_cros_laptop;
		}

		error = bus_register_notifier(&i2c_bus_type,
		&chromeos_laptop_i2c_notifier);
		if (error) {
		pr_err("failed to register i2c bus notifier: %d\n", error);
		chromeos_laptop_destroy(cros_laptop);
		return error;
		pr_err("failed to register i2c bus notifier: %d\n",
		error);
		goto err_destroy_cros_laptop;
		}

		/*
		* Scan adapters that have been registered before we installed
		* the notifier to make sure we do not miss any devices.
		* Scan adapters that have been registered and clients that have
		* been created before we installed the notifier to make sure
		* we do not miss any devices.
		*/
		i2c_for_each_dev(NULL, chromeos_laptop_scan_adapter);
		i2c_for_each_dev(NULL, chromeos_laptop_scan_peripherals);

		return 0;

		err_destroy_cros_laptop:
		chromeos_laptop_destroy(cros_laptop);
		return error;
		}

		static void __exit chromeos_laptop_exit(void)