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@xxxxxxxxx>
---
drivers/platform/x86/panasonic-laptop.c | 86 ++++++++++++++++++++++++-
1 file 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@xxxxxxxxx>
+ * 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 */
--
2.17.5
