Commit 468f96bf authored by Kenneth Chan's avatar Kenneth Chan Committed by Hans de Goede
Browse files

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: default avatarKenneth Chan <kenneth.t.chan@gmail.com>
Link: https://lore.kernel.org/r/20200821181433.17653-9-kenneth.t.chan@gmail.com


Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
parent ed83c917

drivers/platform/x86/panasonic-laptop.c

+83 −3
Original line number Diff line number Diff line
@@ -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 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 */