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authorLinus Torvalds <torvalds@linux-foundation.org>2019-07-12 04:45:29 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-12 04:45:29 +0300
commitd7d170a8e357bd9926cc6bfea5c2385c2eac65b2 (patch)
treecb66ba886b0c0b92d3e41ae551b4bc90e219a913 /drivers/iio
parentd06e4156430e7c5eb4f04dabcaa0d9e2fba335e3 (diff)
parent8c3166e17cf10161d2871dfb1d017287c7b79ff1 (diff)
downloadlinux-d7d170a8e357bd9926cc6bfea5c2385c2eac65b2.tar.xz
Merge tag 'tag-chrome-platform-for-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux
Pull chrome platform updates from Benson Leung "CrOS EC: - Add new CrOS ISHTP transport protocol - Add proper documentation for debugfs entries and expose resume and uptime files - Select LPC transport protocol variant at runtime. - Add lid angle sensor driver - Fix oops on suspend/resume for lightbar driver - Set CrOS SPI transport protol in realtime Wilco EC: - Add telemetry char device interface - Add support for event handling - Add new sysfs attributes Misc: - Contains ib-mfd-cros-v5.3 immutable branch from mfd, with cros_ec_commands.h header freshly synced with Chrome OS's EC project" * tag 'tag-chrome-platform-for-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux: (54 commits) mfd / platform: cros_ec_debugfs: Expose resume result via debugfs platform/chrome: lightbar: Get drvdata from parent in suspend/resume iio: cros_ec: Add lid angle driver platform/chrome: wilco_ec: Add circular buffer as event queue platform/chrome: cros_ec_lpc_mec: Fix kernel-doc comment first line platform/chrome: cros_ec_lpc: Choose Microchip EC at runtime platform/chrome: cros_ec_lpc: Merge cros_ec_lpc and cros_ec_lpc_reg Input: cros_ec_keyb: mask out extra flags in event_type platform/chrome: wilco_ec: Fix unreleased lock in event_read() platform/chrome: cros_ec_debugfs: cros_ec_uptime_fops can be static platform/chrome: cros_ec_debugfs: Add debugfs ABI documentation platform/chrome: cros_ec_debugfs: Fix kernel-doc comment first line platform/chrome: cros_ec_debugfs: Add debugfs entry to retrieve EC uptime mfd: cros_ec: Update I2S API mfd: cros_ec: Add Management API entry points mfd: cros_ec: Add SKU ID and Secure storage API mfd: cros_ec: Add API for rwsig mfd: cros_ec: Add API for Fingerprint support mfd: cros_ec: Add API for Touchpad support mfd: cros_ec: Add API for EC-EC communication ...
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/common/cros_ec_sensors/Kconfig9
-rw-r--r--drivers/iio/common/cros_ec_sensors/Makefile1
-rw-r--r--drivers/iio/common/cros_ec_sensors/cros_ec_lid_angle.c139
3 files changed, 149 insertions, 0 deletions
diff --git a/drivers/iio/common/cros_ec_sensors/Kconfig b/drivers/iio/common/cros_ec_sensors/Kconfig
index f9bf7ff7fcaf..bcb58fb76b9f 100644
--- a/drivers/iio/common/cros_ec_sensors/Kconfig
+++ b/drivers/iio/common/cros_ec_sensors/Kconfig
@@ -21,3 +21,12 @@ config IIO_CROS_EC_SENSORS
Accelerometers, Gyroscope and Magnetometer that are
presented by the ChromeOS EC Sensor hub.
Creates an IIO device for each functions.
+
+config IIO_CROS_EC_SENSORS_LID_ANGLE
+ tristate "ChromeOS EC Sensor for lid angle"
+ depends on IIO_CROS_EC_SENSORS_CORE
+ help
+ Module to report the angle between lid and base for some
+ convertible devices.
+ This module is loaded when the EC can calculate the angle between the base
+ and the lid.
diff --git a/drivers/iio/common/cros_ec_sensors/Makefile b/drivers/iio/common/cros_ec_sensors/Makefile
index 7c2d6a966fe6..e0a33ab66d21 100644
--- a/drivers/iio/common/cros_ec_sensors/Makefile
+++ b/drivers/iio/common/cros_ec_sensors/Makefile
@@ -5,3 +5,4 @@
obj-$(CONFIG_IIO_CROS_EC_SENSORS_CORE) += cros_ec_sensors_core.o
obj-$(CONFIG_IIO_CROS_EC_SENSORS) += cros_ec_sensors.o
+obj-$(CONFIG_IIO_CROS_EC_SENSORS_LID_ANGLE) += cros_ec_lid_angle.o
diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_lid_angle.c b/drivers/iio/common/cros_ec_sensors/cros_ec_lid_angle.c
new file mode 100644
index 000000000000..876dfd176b0e
--- /dev/null
+++ b/drivers/iio/common/cros_ec_sensors/cros_ec_lid_angle.c
@@ -0,0 +1,139 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * cros_ec_lid_angle - Driver for CrOS EC lid angle sensor.
+ *
+ * Copyright 2018 Google, Inc
+ *
+ * This driver uses the cros-ec interface to communicate with the Chrome OS
+ * EC about counter sensors. Counters are presented through
+ * iio sysfs.
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/common/cros_ec_sensors_core.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/kfifo_buf.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/kernel.h>
+#include <linux/mfd/cros_ec.h>
+#include <linux/mfd/cros_ec_commands.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#define DRV_NAME "cros-ec-lid-angle"
+
+/*
+ * One channel for the lid angle, the other for timestamp.
+ */
+static const struct iio_chan_spec cros_ec_lid_angle_channels[] = {
+ {
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .scan_type.realbits = CROS_EC_SENSOR_BITS,
+ .scan_type.storagebits = CROS_EC_SENSOR_BITS,
+ .scan_type.sign = 'u',
+ .type = IIO_ANGL
+ },
+ IIO_CHAN_SOFT_TIMESTAMP(1)
+};
+
+/* State data for ec_sensors iio driver. */
+struct cros_ec_lid_angle_state {
+ /* Shared by all sensors */
+ struct cros_ec_sensors_core_state core;
+};
+
+static int cros_ec_sensors_read_lid_angle(struct iio_dev *indio_dev,
+ unsigned long scan_mask, s16 *data)
+{
+ struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
+ int ret;
+
+ st->param.cmd = MOTIONSENSE_CMD_LID_ANGLE;
+ ret = cros_ec_motion_send_host_cmd(st, sizeof(st->resp->lid_angle));
+ if (ret) {
+ dev_warn(&indio_dev->dev, "Unable to read lid angle\n");
+ return ret;
+ }
+
+ *data = st->resp->lid_angle.value;
+ return 0;
+}
+
+static int cros_ec_lid_angle_read(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct cros_ec_lid_angle_state *st = iio_priv(indio_dev);
+ s16 data;
+ int ret;
+
+ mutex_lock(&st->core.cmd_lock);
+ ret = cros_ec_sensors_read_lid_angle(indio_dev, 1, &data);
+ if (ret == 0) {
+ *val = data;
+ ret = IIO_VAL_INT;
+ }
+ mutex_unlock(&st->core.cmd_lock);
+ return ret;
+}
+
+static const struct iio_info cros_ec_lid_angle_info = {
+ .read_raw = &cros_ec_lid_angle_read,
+};
+
+static int cros_ec_lid_angle_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct iio_dev *indio_dev;
+ struct cros_ec_lid_angle_state *state;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*state));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ ret = cros_ec_sensors_core_init(pdev, indio_dev, false);
+ if (ret)
+ return ret;
+
+ indio_dev->info = &cros_ec_lid_angle_info;
+ state = iio_priv(indio_dev);
+ indio_dev->channels = cros_ec_lid_angle_channels;
+ indio_dev->num_channels = ARRAY_SIZE(cros_ec_lid_angle_channels);
+
+ state->core.read_ec_sensors_data = cros_ec_sensors_read_lid_angle;
+
+ ret = devm_iio_triggered_buffer_setup(dev, indio_dev, NULL,
+ cros_ec_sensors_capture, NULL);
+ if (ret)
+ return ret;
+
+ return devm_iio_device_register(dev, indio_dev);
+}
+
+static const struct platform_device_id cros_ec_lid_angle_ids[] = {
+ {
+ .name = DRV_NAME,
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, cros_ec_lid_angle_ids);
+
+static struct platform_driver cros_ec_lid_angle_platform_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ .pm = &cros_ec_sensors_pm_ops,
+ },
+ .probe = cros_ec_lid_angle_probe,
+ .id_table = cros_ec_lid_angle_ids,
+};
+module_platform_driver(cros_ec_lid_angle_platform_driver);
+
+MODULE_DESCRIPTION("ChromeOS EC driver for reporting convertible lid angle.");
+MODULE_LICENSE("GPL v2");