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- Update ACPICA code in the kernel to upstream revision 20210331 including the following changes: * Add parsing for IVRS IVHD 40h and device entry F0h (Alexander Monakov). * Add new CEDT table for CXL 2.0 and iASL support for it (Ben Widawsky, Bob Moore). * NFIT: add Location Cookie field (Bob Moore). * HMAT: add new fields/flags (Bob Moore). * Add new flags in SRAT (Bob Moore). * PMTT: add new fields/structures (Bob Moore). * Add CSI2Bus resource template (Bob Moore). * iASL: Decode subtable type field for VIOT (Bob Moore). * Fix various typos and spelling mistakes (Colin Ian King). * Add new predefined objects _BPC, _BPS, and _BPT (Erik Kaneda). * Add USB4 capabilities UUID (Erik Kaneda). * Add CXL ACPI device ID and _CBR object (Erik Kaneda). * MADT: add Multiprocessor Wakeup Structure (Erik Kaneda). * PCCT: add support for subtable type 5 (Erik Kaneda). * PPTT: add new version of subtable type 1 (Erik Kaneda). * Add SDEV secure access components (Erik Kaneda). * Add support for PHAT table (Erik Kaneda). * iASL: Add definitions for the VIOT table (Jean-Philippe Brucker). * acpisrc: Add missing conversion for VIOT support (Jean-Philippe Brucker). * IORT: Updates for revision E.b (Shameer Kolothum). - Rearrange message printing in ACPI-related code to avoid using the ACPICA's internal message printing macros outside ACPICA and do some related code cleanups (Rafael Wysocki). - Modify the device enumeration code to turn off all of the unused ACPI power resources at the end (Rafael Wysocki). - Change the ACPI power resources handling code to turn off unused ACPI power resources without checking their status which should not be necessary by the spec (Rafael Wysocki). - Add empty stubs for CPPC-related functions to be used when CONFIG_ACPI_CPPC_LIB is not set (Rafael Wysocki). - Simplify device enumeration code (Rafael Wysocki). - Change device enumeration code to use match_string() for string matching (Andy Shevchenko). - Modify irqresource_disabled() to retain the resouce flags that have been set already (Angela Czubak). - Add native backlight whitelist entry for GA401/GA502/GA503 (Luke Jones). - Modify the ACPI backlight driver to let the native backlight handling take over on hardware-reduced systems (Hans de Goede). - Introduce acpi_dev_get() and switch over the ACPI core code to using it (Andy Shevchenko). - Use kobj_attribute as callback argument instead of a local struct type in the CPPC linrary code (Nathan Chancellor). - Drop unneeded initializatio of a static variable from the ACPI processor driver (Tian Tao). - Drop unnecessary local variable assignment from the ACPI APEI code (Colin Ian King). - Document for_each_acpi_dev_match() macro (Andy Shevchenko). - Address assorted coding style issues in multiple places (Xiaofei Tan). - Capitalize TLAs in a few comments (Andy Shevchenko). - Correct assorted typos in comments (Tom Saeger). -----BEGIN PGP SIGNATURE----- iQJGBAABCAAwFiEE4fcc61cGeeHD/fCwgsRv/nhiVHEFAmCHAL8SHHJqd0Byand5 c29ja2kubmV0AAoJEILEb/54YlRxZroQAIdFsRUTKmm8st9sdfEtF3QHLS3/EV2x 1GlkL+3yE/WuEFXNd0mAv0MTcV2sNMKGd5oz74zLkciPC2dNR4168Ni6DhGSoELM 0ZMOAu9E12Nyq7/1FdWalLQprtR8OuLVwgC2VckK+f//4vzpZ+6PtGMwAwtImSHK m3WRPimVbgOVJ1UWZjsfIm7kLBD4o4oCx0pdeEl77q0oQKmMdcByUh2YnjwKzFnP 9zqV+SCi3HL4w67HO/uMe7x8isNyWONYXVqOvOkgXi7PeoX9v0XiWSCJ0KnAvbI1 PZokJT8pTrKnFyL3zJS6pU/ZHj7ikFiTc+MfyyPcYRJZ5nBvRjqHKoPOtZ9yfU6n jgt/u3REhqwnHy0ikS8HsP+PWnAJF1Re3sNVvIMnX6XxTIndHCXZEoeldfeC23S9 PmzGA0//iPngiYaOVM5BxIjRi2nRBHlVvzSIACICXDcszA81RHePFIzfjUgW3elp v6kAhkrXYajqrDb7NuvY4MTuuBo8w3q2xWJGu5VlDkNOblM0AExRhXmvp1RW0kL7 +mi5X6xBFEB9M6hEoWKnleaZTXTlFYBreKsMPEEP7N7a5+UZRPedcjX1PflCkOB3 uL5p/+x3br1fkDyK0P7wFf3VqiBXuwFajEdCmyHnizpD6m0oWC6pv9PUGYUCneJ1 JGH5X/3Uu33D =5fuB -----END PGP SIGNATURE----- Merge tag 'acpi-5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull ACPI updates from Rafael Wysocki: "These update the ACPICA code in the kernel to the most recent upstream revision including (but not limited to) new material introduced in the 6.4 version of the spec, update message printing in the ACPI-related code, address a few issues and clean up code in a number of places. Specifics: - Update ACPICA code in the kernel to upstream revision 20210331 including the following changes: * Add parsing for IVRS IVHD 40h and device entry F0h (Alexander Monakov). * Add new CEDT table for CXL 2.0 and iASL support for it (Ben Widawsky, Bob Moore). * NFIT: add Location Cookie field (Bob Moore). * HMAT: add new fields/flags (Bob Moore). * Add new flags in SRAT (Bob Moore). * PMTT: add new fields/structures (Bob Moore). * Add CSI2Bus resource template (Bob Moore). * iASL: Decode subtable type field for VIOT (Bob Moore). * Fix various typos and spelling mistakes (Colin Ian King). * Add new predefined objects _BPC, _BPS, and _BPT (Erik Kaneda). * Add USB4 capabilities UUID (Erik Kaneda). * Add CXL ACPI device ID and _CBR object (Erik Kaneda). * MADT: add Multiprocessor Wakeup Structure (Erik Kaneda). * PCCT: add support for subtable type 5 (Erik Kaneda). * PPTT: add new version of subtable type 1 (Erik Kaneda). * Add SDEV secure access components (Erik Kaneda). * Add support for PHAT table (Erik Kaneda). * iASL: Add definitions for the VIOT table (Jean-Philippe Brucker). * acpisrc: Add missing conversion for VIOT support (Jean-Philippe Brucker). * IORT: Updates for revision E.b (Shameer Kolothum). - Rearrange message printing in ACPI-related code to avoid using the ACPICA's internal message printing macros outside ACPICA and do some related code cleanups (Rafael Wysocki). - Modify the device enumeration code to turn off all of the unused ACPI power resources at the end (Rafael Wysocki). - Change the ACPI power resources handling code to turn off unused ACPI power resources without checking their status which should not be necessary by the spec (Rafael Wysocki). - Add empty stubs for CPPC-related functions to be used when CONFIG_ACPI_CPPC_LIB is not set (Rafael Wysocki). - Simplify device enumeration code (Rafael Wysocki). - Change device enumeration code to use match_string() for string matching (Andy Shevchenko). - Modify irqresource_disabled() to retain the resouce flags that have been set already (Angela Czubak). - Add native backlight whitelist entry for GA401/GA502/GA503 (Luke Jones). - Modify the ACPI backlight driver to let the native backlight handling take over on hardware-reduced systems (Hans de Goede). - Introduce acpi_dev_get() and switch over the ACPI core code to using it (Andy Shevchenko). - Use kobj_attribute as callback argument instead of a local struct type in the CPPC linrary code (Nathan Chancellor). - Drop unneeded initializatio of a static variable from the ACPI processor driver (Tian Tao). - Drop unnecessary local variable assignment from the ACPI APEI code (Colin Ian King). - Document for_each_acpi_dev_match() macro (Andy Shevchenko). - Address assorted coding style issues in multiple places (Xiaofei Tan). - Capitalize TLAs in a few comments (Andy Shevchenko). - Correct assorted typos in comments (Tom Saeger)" * tag 'acpi-5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (68 commits) ACPI: video: use native backlight for GA401/GA502/GA503 ACPI: APEI: remove redundant assignment to variable rc ACPI: utils: Capitalize abbreviations in the comments ACPI: utils: Document for_each_acpi_dev_match() macro ACPI: bus: Introduce acpi_dev_get() and reuse it in ACPI code ACPI: scan: Utilize match_string() API resource: Prevent irqresource_disabled() from erasing flags ACPI: CPPC: Replace cppc_attr with kobj_attribute ACPI: scan: Call acpi_get_object_info() from acpi_set_pnp_ids() ACPI: scan: Drop sta argument from acpi_init_device_object() ACPI: scan: Drop sta argument from acpi_add_single_object() ACPI: scan: Rearrange checks in acpi_bus_check_add() ACPI: scan: Fold acpi_bus_type_and_status() into its caller ACPI: video: Check LCD flag on ACPI-reduced-hardware devices ACPI: utils: Add acpi_reduced_hardware() helper ACPI: dock: fix some coding style issues ACPI: sysfs: fix some coding style issues ACPI: PM: add a missed blank line after declarations ACPI: custom_method: fix a coding style issue ACPI: CPPC: fix some coding style issues ...
253 lines
6.4 KiB
C
253 lines
6.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* ACPI Ambient Light Sensor Driver
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*
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* Based on ALS driver:
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* Copyright (C) 2009 Zhang Rui <rui.zhang@intel.com>
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*
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* Rework for IIO subsystem:
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* Copyright (C) 2012-2013 Martin Liska <marxin.liska@gmail.com>
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*
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* Final cleanup and debugging:
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* Copyright (C) 2013-2014 Marek Vasut <marex@denx.de>
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* Copyright (C) 2015 Gabriele Mazzotta <gabriele.mzt@gmail.com>
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*/
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#include <linux/module.h>
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#include <linux/acpi.h>
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#include <linux/err.h>
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#include <linux/irq.h>
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#include <linux/mutex.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/buffer.h>
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#include <linux/iio/trigger.h>
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#include <linux/iio/triggered_buffer.h>
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#include <linux/iio/trigger_consumer.h>
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#define ACPI_ALS_CLASS "als"
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#define ACPI_ALS_DEVICE_NAME "acpi-als"
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#define ACPI_ALS_NOTIFY_ILLUMINANCE 0x80
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/*
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* So far, there's only one channel in here, but the specification for
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* ACPI0008 says there can be more to what the block can report. Like
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* chromaticity and such. We are ready for incoming additions!
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*/
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static const struct iio_chan_spec acpi_als_channels[] = {
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{
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.type = IIO_LIGHT,
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.scan_type = {
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.sign = 's',
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.realbits = 32,
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.storagebits = 32,
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},
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/* _RAW is here for backward ABI compatibility */
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
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BIT(IIO_CHAN_INFO_PROCESSED),
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},
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IIO_CHAN_SOFT_TIMESTAMP(1),
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};
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/*
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* The event buffer contains timestamp and all the data from
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* the ACPI0008 block. There are multiple, but so far we only
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* support _ALI (illuminance): One channel, padding and timestamp.
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*/
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#define ACPI_ALS_EVT_BUFFER_SIZE \
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(sizeof(s32) + sizeof(s32) + sizeof(s64))
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struct acpi_als {
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struct acpi_device *device;
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struct mutex lock;
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struct iio_trigger *trig;
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s32 evt_buffer[ACPI_ALS_EVT_BUFFER_SIZE / sizeof(s32)] __aligned(8);
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};
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/*
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* All types of properties the ACPI0008 block can report. The ALI, ALC, ALT
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* and ALP can all be handled by acpi_als_read_value() below, while the ALR is
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* special.
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*
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* The _ALR property returns tables that can be used to fine-tune the values
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* reported by the other props based on the particular hardware type and it's
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* location (it contains tables for "rainy", "bright inhouse lighting" etc.).
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*
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* So far, we support only ALI (illuminance).
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*/
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#define ACPI_ALS_ILLUMINANCE "_ALI"
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#define ACPI_ALS_CHROMATICITY "_ALC"
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#define ACPI_ALS_COLOR_TEMP "_ALT"
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#define ACPI_ALS_POLLING "_ALP"
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#define ACPI_ALS_TABLES "_ALR"
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static int acpi_als_read_value(struct acpi_als *als, char *prop, s32 *val)
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{
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unsigned long long temp_val;
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acpi_status status;
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status = acpi_evaluate_integer(als->device->handle, prop, NULL,
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&temp_val);
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if (ACPI_FAILURE(status)) {
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acpi_evaluation_failure_warn(als->device->handle, prop, status);
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return -EIO;
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}
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*val = temp_val;
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return 0;
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}
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static void acpi_als_notify(struct acpi_device *device, u32 event)
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{
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struct iio_dev *indio_dev = acpi_driver_data(device);
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struct acpi_als *als = iio_priv(indio_dev);
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if (iio_buffer_enabled(indio_dev) && iio_trigger_using_own(indio_dev)) {
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switch (event) {
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case ACPI_ALS_NOTIFY_ILLUMINANCE:
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iio_trigger_poll_chained(als->trig);
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break;
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default:
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/* Unhandled event */
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dev_dbg(&device->dev,
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"Unhandled ACPI ALS event (%08x)!\n",
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event);
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}
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}
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}
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static int acpi_als_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan, int *val,
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int *val2, long mask)
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{
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struct acpi_als *als = iio_priv(indio_dev);
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s32 temp_val;
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int ret;
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if ((mask != IIO_CHAN_INFO_PROCESSED) && (mask != IIO_CHAN_INFO_RAW))
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return -EINVAL;
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/* we support only illumination (_ALI) so far. */
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if (chan->type != IIO_LIGHT)
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return -EINVAL;
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ret = acpi_als_read_value(als, ACPI_ALS_ILLUMINANCE, &temp_val);
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if (ret < 0)
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return ret;
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*val = temp_val;
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return IIO_VAL_INT;
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}
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static const struct iio_info acpi_als_info = {
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.read_raw = acpi_als_read_raw,
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};
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static irqreturn_t acpi_als_trigger_handler(int irq, void *p)
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{
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struct iio_poll_func *pf = p;
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struct iio_dev *indio_dev = pf->indio_dev;
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struct acpi_als *als = iio_priv(indio_dev);
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s32 *buffer = als->evt_buffer;
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s32 val;
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int ret;
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mutex_lock(&als->lock);
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ret = acpi_als_read_value(als, ACPI_ALS_ILLUMINANCE, &val);
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if (ret < 0)
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goto out;
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*buffer = val;
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/*
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* When coming from own trigger via polls, set polling function
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* timestamp here. Given ACPI notifier is already in a thread and call
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* function directly, there is no need to set the timestamp in the
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* notify function.
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*
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* If the timestamp was actually 0, the timestamp is set one more time.
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*/
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if (!pf->timestamp)
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pf->timestamp = iio_get_time_ns(indio_dev);
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iio_push_to_buffers_with_timestamp(indio_dev, buffer, pf->timestamp);
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out:
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mutex_unlock(&als->lock);
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iio_trigger_notify_done(indio_dev->trig);
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return IRQ_HANDLED;
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}
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static int acpi_als_add(struct acpi_device *device)
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{
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struct device *dev = &device->dev;
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struct iio_dev *indio_dev;
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struct acpi_als *als;
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int ret;
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indio_dev = devm_iio_device_alloc(dev, sizeof(*als));
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if (!indio_dev)
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return -ENOMEM;
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als = iio_priv(indio_dev);
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device->driver_data = indio_dev;
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als->device = device;
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mutex_init(&als->lock);
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indio_dev->name = ACPI_ALS_DEVICE_NAME;
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indio_dev->info = &acpi_als_info;
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indio_dev->channels = acpi_als_channels;
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indio_dev->num_channels = ARRAY_SIZE(acpi_als_channels);
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als->trig = devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name, indio_dev->id);
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if (!als->trig)
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return -ENOMEM;
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ret = devm_iio_trigger_register(dev, als->trig);
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if (ret)
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return ret;
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/*
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* Set hardware trigger by default to let events flow when
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* BIOS support notification.
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*/
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indio_dev->trig = iio_trigger_get(als->trig);
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ret = devm_iio_triggered_buffer_setup(dev, indio_dev,
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iio_pollfunc_store_time,
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acpi_als_trigger_handler,
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NULL);
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if (ret)
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return ret;
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return devm_iio_device_register(dev, indio_dev);
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}
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static const struct acpi_device_id acpi_als_device_ids[] = {
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{"ACPI0008", 0},
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{},
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};
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MODULE_DEVICE_TABLE(acpi, acpi_als_device_ids);
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static struct acpi_driver acpi_als_driver = {
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.name = "acpi_als",
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.class = ACPI_ALS_CLASS,
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.ids = acpi_als_device_ids,
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.ops = {
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.add = acpi_als_add,
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.notify = acpi_als_notify,
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},
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};
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module_acpi_driver(acpi_als_driver);
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MODULE_AUTHOR("Zhang Rui <rui.zhang@intel.com>");
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MODULE_AUTHOR("Martin Liska <marxin.liska@gmail.com>");
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MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
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MODULE_DESCRIPTION("ACPI Ambient Light Sensor Driver");
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MODULE_LICENSE("GPL");
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