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Orlando Chamberlain
97ccd7d579
echo 50 | sudo tee /sys/bus/acpi/drivers/applesmc/APP0001:00/battery_charge_limit etc etc. Max is 100, min is 0
97 lines
2.7 KiB
Diff
97 lines
2.7 KiB
Diff
From 38786c7979c8ece013b5b7d5cb07dc2aa40198be Mon Sep 17 00:00:00 2001
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From: Orlando Chamberlain <orlandoch.dev@gmail.com>
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Date: Mon, 30 Jan 2023 18:42:21 +1100
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Subject: [PATCH 1/1] applesmc: battery charge limiter
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---
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drivers/hwmon/applesmc.c | 42 +++++++++++++++++++++++++++++++++++++++-
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1 file changed, 41 insertions(+), 1 deletion(-)
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diff --git a/drivers/hwmon/applesmc.c b/drivers/hwmon/applesmc.c
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index 12be9269a314..bc1eec74cfef 100644
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--- a/drivers/hwmon/applesmc.c
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+++ b/drivers/hwmon/applesmc.c
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@@ -1478,6 +1478,35 @@ static void applesmc_brightness_set(struct led_classdev *led_cdev,
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dev_dbg(led_cdev->dev, "work was already on the queue.\n");
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}
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+static ssize_t applesmc_BCLM_store(struct device *dev,
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+ struct device_attribute *attr, char *sysfsbuf, size_t count)
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+{
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+ struct applesmc_device *smc = dev_get_drvdata(dev);
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+ u8 val;
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+
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+ if (kstrtou8(sysfsbuf, 10, &val) < 0)
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+ return -EINVAL;
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+
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+ if (val < 0 || val > 100)
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+ return -EINVAL;
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+
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+ if (applesmc_write_key(smc, "BCLM", &val, 1))
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+ return -ENODEV;
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+ return count;
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+}
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+
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+static ssize_t applesmc_BCLM_show(struct device *dev,
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+ struct device_attribute *attr, char *sysfsbuf)
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+{
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+ struct applesmc_device *smc = dev_get_drvdata(dev);
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+ u8 val;
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+
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+ if (applesmc_read_key(smc, "BCLM", &val, 1))
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+ return -ENODEV;
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+
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+ return sysfs_emit(sysfsbuf, "%d\n", val);
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+}
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+
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static ssize_t applesmc_key_count_show(struct device *dev,
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struct device_attribute *attr, char *sysfsbuf)
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{
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@@ -1612,6 +1641,11 @@ static struct applesmc_node_group temp_group[] = {
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{ }
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};
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+static struct applesmc_node_group BCLM_group[] = {
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+ { "battery_charge_limit", applesmc_BCLM_show, applesmc_BCLM_store },
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+ { }
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+};
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+
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/* Module stuff */
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/*
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@@ -1830,10 +1864,13 @@ static int applesmc_create_modules(struct applesmc_device *smc)
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ret = applesmc_create_nodes(smc, info_group, 1);
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if (ret)
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goto out;
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+ ret = applesmc_create_nodes(smc, BCLM_group, 1);
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+ if (ret)
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+ goto out_info;
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ret = applesmc_create_nodes(smc, fan_group, smc->reg.fan_count);
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if (ret)
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- goto out_info;
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+ goto out_bclm;
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ret = applesmc_create_nodes(smc, temp_group, smc->reg.index_count);
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if (ret)
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@@ -1869,6 +1906,8 @@ static int applesmc_create_modules(struct applesmc_device *smc)
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applesmc_destroy_nodes(smc, temp_group);
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out_fans:
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applesmc_destroy_nodes(smc, fan_group);
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+out_bclm:
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+ applesmc_destroy_nodes(smc, BCLM_group);
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out_info:
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applesmc_destroy_nodes(smc, info_group);
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out:
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@@ -1883,6 +1922,7 @@ static void applesmc_destroy_modules(struct applesmc_device *smc)
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applesmc_release_accelerometer(smc);
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applesmc_destroy_nodes(smc, temp_group);
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applesmc_destroy_nodes(smc, fan_group);
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+ applesmc_destroy_nodes(smc, BCLM_group);
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applesmc_destroy_nodes(smc, info_group);
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}
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--
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2.39.1
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