Commit 8983bfd5 authored by Matan Ziv-Av's avatar Matan Ziv-Av Committed by Hans de Goede
Browse files

platform/x86: lg-laptop: Support for battery charge limit on newer models 



Add support for the difference between various models:

- Use dmi to detect laptop model.
- 2019 and newer models use _wmbb method to set battery charge limit.

Signed-off-by: default avatarMatan Ziv-Av <matan@svgalib.org>
Link: https://lore.kernel.org/r/bd6922a412e50c2dcfb7ce24fc8687f577181d65.1629291912.git.matan@svgalib.org


Reviewed-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
parent dcfbd31e

drivers/platform/x86/lg-laptop.c

+66 −9
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ 
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt



#include <linux/acpi.h>

#include <linux/dmi.h>

#include <linux/input.h>

#include <linux/input/sparse-keymap.h>

#include <linux/kernel.h>
@@ -69,6 +70,8 @@ static u32 inited; 
#define INIT_INPUT_ACPI         0x04

#define INIT_SPARSE_KEYMAP      0x80



static int battery_limit_use_wmbb;



static const struct key_entry wmi_keymap[] = {

	{KE_KEY, 0x70, {KEY_F15} },	 /* LG control panel (F1) */

	{KE_KEY, 0x74, {KEY_F13} },	 /* Touchpad toggle (F5) */
@@ -461,6 +464,9 @@ static ssize_t battery_care_limit_store(struct device *dev, 
	if (value == 100 || value == 80) {

		union acpi_object *r;



		if (battery_limit_use_wmbb)

			r = lg_wmbb(WMBB_BATT_LIMIT, WM_SET, value);

		else

			r = lg_wmab(WM_BATT_LIMIT, WM_SET, value);

		if (!r)

			return -EIO;
@@ -479,6 +485,18 @@ static ssize_t battery_care_limit_show(struct device *dev, 
	unsigned int status;

	union acpi_object *r;



	if (battery_limit_use_wmbb) {

		r = lg_wmbb(WMBB_BATT_LIMIT, WM_GET, 0);

		if (!r)

			return -EIO;



		if (r->type != ACPI_TYPE_BUFFER) {

			kfree(r);

			return -EIO;

		}



		status = r->buffer.pointer[0x10];

	} else {

		r = lg_wmab(WM_BATT_LIMIT, WM_GET, 0);

		if (!r)

			return -EIO;
@@ -489,6 +507,7 @@ static ssize_t battery_care_limit_show(struct device *dev, 
		}



		status = r->integer.value;

	}

	kfree(r);

	if (status != 80 && status != 100)

		status = 0;
@@ -602,6 +621,8 @@ static struct platform_driver pf_driver = { 
static int acpi_add(struct acpi_device *device)

{

	int ret;

	const char *product;

	int year = 2017;



	if (pf_device)

		return 0;
@@ -619,6 +640,42 @@ static int acpi_add(struct acpi_device *device) 
		pr_err("unable to register platform device\n");

		goto out_platform_registered;

	}

	product = dmi_get_system_info(DMI_PRODUCT_NAME);

	if (strlen(product) > 4)

		switch (product[4]) {

		case '5':

		case '6':

			year = 2016;

			break;

		case '7':

			year = 2017;

			break;

		case '8':

			year = 2018;

			break;

		case '9':

			year = 2019;

			break;

		case '0':

			if (strlen(product) > 5)

				switch (product[5]) {

				case 'N':

					year = 2020;

					break;

				case 'P':

					year = 2021;

					break;

				default:

					year = 2022;

				}

			break;

		default:

			year = 2019;

		}

	pr_info("product: %s  year: %d\n", product, year);



	if (year >= 2019)

		battery_limit_use_wmbb = 1;



	ret = sysfs_create_group(&pf_device->dev.kobj, &dev_attribute_group);

	if (ret)