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author | 2020-08-22 02:14:32 +0800 | |
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committer | 2020-11-10 14:49:50 +0100 | |
commit | 468f96bfa3a045450f54c96e63db786b0b5fcab2 (patch) | |
tree | cb9799fdec14cca8fb08c67f609c44512514020a /drivers/platform | |
parent | platform/x86: panasonic-laptop: Resolve hotkey double trigger bug (diff) | |
download | linux-468f96bfa3a045450f54c96e63db786b0b5fcab2.tar.gz linux-468f96bfa3a045450f54c96e63db786b0b5fcab2.tar.bz2 linux-468f96bfa3a045450f54c96e63db786b0b5fcab2.zip |
platform/x86: panasonic-laptop: Add support for battery charging threshold (eco mode)
Add battery charging threshold (aka ECO mode) support.
NOTE: The state of ECO mode is persistent until the next POST cycle which
reset it to previous state.
Signed-off-by: Kenneth Chan <kenneth.t.chan@gmail.com>
Link: https://lore.kernel.org/r/20200821181433.17653-9-kenneth.t.chan@gmail.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'drivers/platform')
-rw-r--r-- | drivers/platform/x86/panasonic-laptop.c | 86 |
1 files changed, 83 insertions, 3 deletions
diff --git a/drivers/platform/x86/panasonic-laptop.c b/drivers/platform/x86/panasonic-laptop.c index 6779099a3ec9..6355d60dc3eb 100644 --- a/drivers/platform/x86/panasonic-laptop.c +++ b/drivers/platform/x86/panasonic-laptop.c @@ -13,6 +13,7 @@ * * ChangeLog: * Aug.18, 2020 Kenneth Chan <kenneth.t.chan@gmail.com> + * add support for battery charging threshold (eco mode) * resolve hotkey double trigger * add write support to mute * fix sticky_key init bug @@ -147,7 +148,10 @@ MODULE_LICENSE("GPL"); #define METHOD_HKEY_SQTY "SQTY" #define METHOD_HKEY_SINF "SINF" #define METHOD_HKEY_SSET "SSET" -#define HKEY_NOTIFY 0x80 +#define METHOD_ECWR "\\_SB.ECWR" +#define HKEY_NOTIFY 0x80 +#define ECO_MODE_OFF 0x00 +#define ECO_MODE_ON 0x80 #define ACPI_PCC_DRIVER_NAME "Panasonic Laptop Support" #define ACPI_PCC_DEVICE_NAME "Hotkey" @@ -156,7 +160,7 @@ MODULE_LICENSE("GPL"); #define ACPI_PCC_INPUT_PHYS "panasonic/hkey0" /* LCD_TYPEs: 0 = Normal, 1 = Semi-transparent - ENV_STATEs: Normal temp=0x01, High temp=0x81, N/A=0x00 + ECO_MODEs: 0x03 = off, 0x83 = on */ enum SINF_BITS { SINF_NUM_BATTERIES = 0, SINF_LCD_TYPE, @@ -168,7 +172,7 @@ enum SINF_BITS { SINF_NUM_BATTERIES = 0, SINF_DC_CUR_BRIGHT, SINF_MUTE, SINF_RESERVED, - SINF_ENV_STATE, + SINF_ECO_MODE = 0x0A, SINF_STICKY_KEY = 0x80, }; /* R1 handles SINF_AC_CUR_BRIGHT as SINF_CUR_BRIGHT, doesn't know AC state */ @@ -222,6 +226,7 @@ struct pcc_acpi { acpi_handle handle; unsigned long num_sifr; int sticky_key; + int eco_mode; int mute; u32 *sinf; struct acpi_device *device; @@ -534,6 +539,77 @@ static ssize_t sticky_key_store(struct device *dev, struct device_attribute *att return count; } +static ssize_t eco_mode_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct acpi_device *acpi = to_acpi_device(dev); + struct pcc_acpi *pcc = acpi_driver_data(acpi); + int result; + + if (!acpi_pcc_retrieve_biosdata(pcc)) + return -EIO; + + switch (pcc->sinf[SINF_ECO_MODE]) { + case (ECO_MODE_OFF + 3): + result = 0; + break; + case (ECO_MODE_ON + 3): + result = 1; + break; + default: + result = -EIO; + break; + } + return snprintf(buf, PAGE_SIZE, "%u\n", result); +} + +static ssize_t eco_mode_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct acpi_device *acpi = to_acpi_device(dev); + struct pcc_acpi *pcc = acpi_driver_data(acpi); + int err, state; + + union acpi_object param[2]; + struct acpi_object_list input; + acpi_status status; + + param[0].type = ACPI_TYPE_INTEGER; + param[0].integer.value = 0x15; + param[1].type = ACPI_TYPE_INTEGER; + input.count = 2; + input.pointer = param; + + err = kstrtoint(buf, 0, &state); + if (err) + return err; + + switch (state) { + case 0: + param[1].integer.value = ECO_MODE_OFF; + pcc->sinf[SINF_ECO_MODE] = 0; + pcc->eco_mode = 0; + break; + case 1: + param[1].integer.value = ECO_MODE_ON; + pcc->sinf[SINF_ECO_MODE] = 1; + pcc->eco_mode = 1; + break; + default: + /* nothing to do */ + return count; + } + + status = acpi_evaluate_object(NULL, METHOD_ECWR, + &input, NULL); + if (ACPI_FAILURE(status)) { + pr_err("%s evaluation failed\n", METHOD_ECWR); + return -EINVAL; + } + + return count; +} + static ssize_t cdpower_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -556,6 +632,7 @@ static DEVICE_ATTR_RO(numbatt); static DEVICE_ATTR_RO(lcdtype); static DEVICE_ATTR_RW(mute); static DEVICE_ATTR_RW(sticky_key); +static DEVICE_ATTR_RW(eco_mode); static DEVICE_ATTR_RW(cdpower); static struct attribute *pcc_sysfs_entries[] = { @@ -563,6 +640,7 @@ static struct attribute *pcc_sysfs_entries[] = { &dev_attr_lcdtype.attr, &dev_attr_mute.attr, &dev_attr_sticky_key.attr, + &dev_attr_eco_mode.attr, &dev_attr_cdpower.attr, NULL, }; @@ -714,6 +792,7 @@ static int acpi_pcc_hotkey_resume(struct device *dev) return -EINVAL; acpi_pcc_write_sset(pcc, SINF_MUTE, pcc->mute); + acpi_pcc_write_sset(pcc, SINF_ECO_MODE, pcc->eco_mode); acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, pcc->sticky_key); return 0; @@ -784,6 +863,7 @@ static int acpi_pcc_hotkey_add(struct acpi_device *device) acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, 0); pcc->sticky_key = 0; + pcc->eco_mode = pcc->sinf[SINF_ECO_MODE]; pcc->mute = pcc->sinf[SINF_MUTE]; /* add sysfs attributes */ |