Merge tag 'chrome-platform-for-linus-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/bleung/chrome-platform

Pull chrome platform updates from Benson Leung:

- move cros_ec_dev to drivers/mfd

- other small maintenance fixes

[ The cros_ec_dev movement came in earlier through the MFD tree - Linus ]

* tag 'chrome-platform-for-linus-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/bleung/chrome-platform:
platform/chrome: Use proper protocol transfer function
platform/chrome: cros_ec_lpc: Add support for Google Glimmer
platform/chrome: cros_ec_lpc: Register the driver if ACPI entry is missing.
platform/chrome: cros_ec_lpc: remove redundant pointer request
cros_ec: fix nul-termination for firmware build info
platform/chrome: chromeos_laptop: make chromeos_laptop const

drivers/platform/chrome/chromeos_laptop.c

···
 	return ret;
 }
 
-static struct chromeos_laptop samsung_series_5_550 = {
+static const struct chromeos_laptop samsung_series_5_550 = {
 	.i2c_peripherals = {
 		/* Touchpad. */
 		{ .add = setup_cyapa_tp, I2C_ADAPTER_SMBUS },
···
 	},
 };
 
-static struct chromeos_laptop samsung_series_5 = {
+static const struct chromeos_laptop samsung_series_5 = {
 	.i2c_peripherals = {
 		/* Light Sensor. */
 		{ .add = setup_tsl2583_als, I2C_ADAPTER_SMBUS },
 	},
 };
 
-static struct chromeos_laptop chromebook_pixel = {
+static const struct chromeos_laptop chromebook_pixel = {
 	.i2c_peripherals = {
 		/* Touch Screen. */
 		{ .add = setup_atmel_1664s_ts, I2C_ADAPTER_PANEL },
···
 	},
 };
 
-static struct chromeos_laptop hp_chromebook_14 = {
+static const struct chromeos_laptop hp_chromebook_14 = {
 	.i2c_peripherals = {
 		/* Touchpad. */
 		{ .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 },
 	},
 };
 
-static struct chromeos_laptop dell_chromebook_11 = {
+static const struct chromeos_laptop dell_chromebook_11 = {
 	.i2c_peripherals = {
 		/* Touchpad. */
 		{ .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 },
···
 	},
 };
 
-static struct chromeos_laptop toshiba_cb35 = {
+static const struct chromeos_laptop toshiba_cb35 = {
 	.i2c_peripherals = {
 		/* Touchpad. */
 		{ .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 },
 	},
 };
 
-static struct chromeos_laptop acer_c7_chromebook = {
+static const struct chromeos_laptop acer_c7_chromebook = {
 	.i2c_peripherals = {
 		/* Touchpad. */
 		{ .add = setup_cyapa_tp, I2C_ADAPTER_SMBUS },
 	},
 };
 
-static struct chromeos_laptop acer_ac700 = {
+static const struct chromeos_laptop acer_ac700 = {
 	.i2c_peripherals = {
 		/* Light Sensor. */
 		{ .add = setup_tsl2563_als, I2C_ADAPTER_SMBUS },
 	},
 };
 
-static struct chromeos_laptop acer_c720 = {
+static const struct chromeos_laptop acer_c720 = {
 	.i2c_peripherals = {
 		/* Touchscreen. */
 		{ .add = setup_atmel_1664s_ts, I2C_ADAPTER_DESIGNWARE_1 },
···
 	},
 };
 
-static struct chromeos_laptop hp_pavilion_14_chromebook = {
+static const struct chromeos_laptop hp_pavilion_14_chromebook = {
 	.i2c_peripherals = {
 		/* Touchpad. */
 		{ .add = setup_cyapa_tp, I2C_ADAPTER_SMBUS },
 	},
 };
 
-static struct chromeos_laptop cr48 = {
+static const struct chromeos_laptop cr48 = {
 	.i2c_peripherals = {
 		/* Light Sensor. */
 		{ .add = setup_tsl2563_als, I2C_ADAPTER_SMBUS },

drivers/platform/chrome/cros_ec_lpc.c

···
 #define DRV_NAME "cros_ec_lpcs"
 #define ACPI_DRV_NAME "GOOG0004"
 
+/* True if ACPI device is present */
+static bool cros_ec_lpc_acpi_device_found;
+
 static int ec_response_timed_out(void)
 {
 	unsigned long one_second = jiffies + HZ;
···
 static int cros_ec_pkt_xfer_lpc(struct cros_ec_device *ec,
 				struct cros_ec_command *msg)
 {
-	struct ec_host_request *request;
 	struct ec_host_response response;
 	u8 sum;
 	int ret = 0;
···
 
 	/* Write buffer */
 	cros_ec_lpc_write_bytes(EC_LPC_ADDR_HOST_PACKET, ret, ec->dout);
-
-	request = (struct ec_host_request *)ec->dout;
 
 	/* Here we go */
 	sum = EC_COMMAND_PROTOCOL_3;
···
 			DMI_MATCH(DMI_PRODUCT_NAME, "Peppy"),
 		},
 	},
+	{
+		/* x86-glimmer, the Lenovo Thinkpad Yoga 11e. */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Glimmer"),
+		},
+	},
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(dmi, cros_ec_lpc_dmi_table);
···
 	.remove = cros_ec_lpc_remove,
 };
 
+static struct platform_device cros_ec_lpc_device = {
+	.name = DRV_NAME
+};
+
+static acpi_status cros_ec_lpc_parse_device(acpi_handle handle, u32 level,
+					    void *context, void **retval)
+{
+	*(bool *)context = true;
+	return AE_CTRL_TERMINATE;
+}
+
 static int __init cros_ec_lpc_init(void)
 {
 	int ret;
+	acpi_status status;
 
 	if (!dmi_check_system(cros_ec_lpc_dmi_table)) {
 		pr_err(DRV_NAME ": unsupported system.\n");
···
 		return ret;
 	}
 
-	return 0;
+	status = acpi_get_devices(ACPI_DRV_NAME, cros_ec_lpc_parse_device,
+				  &cros_ec_lpc_acpi_device_found, NULL);
+	if (ACPI_FAILURE(status))
+		pr_warn(DRV_NAME ": Looking for %s failed\n", ACPI_DRV_NAME);
+
+	if (!cros_ec_lpc_acpi_device_found) {
+		/* Register the device, and it'll get hooked up automatically */
+		ret = platform_device_register(&cros_ec_lpc_device);
+		if (ret) {
+			pr_err(DRV_NAME ": can't register device: %d\n", ret);
+			platform_driver_unregister(&cros_ec_lpc_driver);
+			cros_ec_lpc_reg_destroy();
+		}
+	}
+
+	return ret;
 }
 
 static void __exit cros_ec_lpc_exit(void)
 {
+	if (!cros_ec_lpc_acpi_device_found)
+		platform_device_unregister(&cros_ec_lpc_device);
 	platform_driver_unregister(&cros_ec_lpc_driver);
 	cros_ec_lpc_reg_destroy();
 }

drivers/platform/chrome/cros_ec_proto.c

···
 			struct cros_ec_command *msg)
 {
 	int ret;
+	int (*xfer_fxn)(struct cros_ec_device *ec, struct cros_ec_command *msg);
 
 	if (ec_dev->proto_version > 2)
-		ret = ec_dev->pkt_xfer(ec_dev, msg);
+		xfer_fxn = ec_dev->pkt_xfer;
 	else
-		ret = ec_dev->cmd_xfer(ec_dev, msg);
+		xfer_fxn = ec_dev->cmd_xfer;
 
+	ret = (*xfer_fxn)(ec_dev, msg);
 	if (msg->result == EC_RES_IN_PROGRESS) {
 		int i;
 		struct cros_ec_command *status_msg;
···
 		for (i = 0; i < EC_COMMAND_RETRIES; i++) {
 			usleep_range(10000, 11000);
 
-			ret = ec_dev->cmd_xfer(ec_dev, status_msg);
+			ret = (*xfer_fxn)(ec_dev, status_msg);
 			if (ret < 0)
 				break;
 

drivers/platform/chrome/cros_ec_sysfs.c

···
 		count += scnprintf(buf + count, PAGE_SIZE - count,
 				   "Build info:    EC error %d\n", msg->result);
 	else {
-		msg->data[sizeof(msg->data) - 1] = '\0';
+		msg->data[EC_HOST_PARAM_SIZE - 1] = '\0';
 		count += scnprintf(buf + count, PAGE_SIZE - count,
 				   "Build info:    %s\n", msg->data);
 	}