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-rw-r--r--drivers/power/supply/olpc_battery.c733
1 files changed, 733 insertions, 0 deletions
diff --git a/drivers/power/supply/olpc_battery.c b/drivers/power/supply/olpc_battery.c
new file mode 100644
index 000000000..a5da20ffd
--- /dev/null
+++ b/drivers/power/supply/olpc_battery.c
@@ -0,0 +1,733 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Battery driver for One Laptop Per Child board.
+ *
+ * Copyright © 2006-2010 David Woodhouse <dwmw2@infradead.org>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/types.h>
+#include <linux/err.h>
+#include <linux/device.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/jiffies.h>
+#include <linux/sched.h>
+#include <linux/olpc-ec.h>
+
+
+#define EC_BAT_VOLTAGE 0x10 /* uint16_t, *9.76/32, mV */
+#define EC_BAT_CURRENT 0x11 /* int16_t, *15.625/120, mA */
+#define EC_BAT_ACR 0x12 /* int16_t, *6250/15, µAh */
+#define EC_BAT_TEMP 0x13 /* uint16_t, *100/256, °C */
+#define EC_AMB_TEMP 0x14 /* uint16_t, *100/256, °C */
+#define EC_BAT_STATUS 0x15 /* uint8_t, bitmask */
+#define EC_BAT_SOC 0x16 /* uint8_t, percentage */
+#define EC_BAT_SERIAL 0x17 /* uint8_t[6] */
+#define EC_BAT_EEPROM 0x18 /* uint8_t adr as input, uint8_t output */
+#define EC_BAT_ERRCODE 0x1f /* uint8_t, bitmask */
+
+#define BAT_STAT_PRESENT 0x01
+#define BAT_STAT_FULL 0x02
+#define BAT_STAT_LOW 0x04
+#define BAT_STAT_DESTROY 0x08
+#define BAT_STAT_AC 0x10
+#define BAT_STAT_CHARGING 0x20
+#define BAT_STAT_DISCHARGING 0x40
+#define BAT_STAT_TRICKLE 0x80
+
+#define BAT_ERR_INFOFAIL 0x02
+#define BAT_ERR_OVERVOLTAGE 0x04
+#define BAT_ERR_OVERTEMP 0x05
+#define BAT_ERR_GAUGESTOP 0x06
+#define BAT_ERR_OUT_OF_CONTROL 0x07
+#define BAT_ERR_ID_FAIL 0x09
+#define BAT_ERR_ACR_FAIL 0x10
+
+#define BAT_ADDR_MFR_TYPE 0x5F
+
+struct olpc_battery_data {
+ struct power_supply *olpc_ac;
+ struct power_supply *olpc_bat;
+ char bat_serial[17];
+ bool new_proto;
+ bool little_endian;
+};
+
+/*********************************************************************
+ * Power
+ *********************************************************************/
+
+static int olpc_ac_get_prop(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ int ret = 0;
+ uint8_t status;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &status, 1);
+ if (ret)
+ return ret;
+
+ val->intval = !!(status & BAT_STAT_AC);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ return ret;
+}
+
+static enum power_supply_property olpc_ac_props[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+};
+
+static const struct power_supply_desc olpc_ac_desc = {
+ .name = "olpc_ac",
+ .type = POWER_SUPPLY_TYPE_MAINS,
+ .properties = olpc_ac_props,
+ .num_properties = ARRAY_SIZE(olpc_ac_props),
+ .get_property = olpc_ac_get_prop,
+};
+
+static int olpc_bat_get_status(struct olpc_battery_data *data,
+ union power_supply_propval *val, uint8_t ec_byte)
+{
+ if (data->new_proto) {
+ if (ec_byte & (BAT_STAT_CHARGING | BAT_STAT_TRICKLE))
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ else if (ec_byte & BAT_STAT_DISCHARGING)
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+ else if (ec_byte & BAT_STAT_FULL)
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ else /* er,... */
+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ } else {
+ /* Older EC didn't report charge/discharge bits */
+ if (!(ec_byte & BAT_STAT_AC)) /* No AC means discharging */
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+ else if (ec_byte & BAT_STAT_FULL)
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ else /* Not _necessarily_ true but EC doesn't tell all yet */
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ }
+
+ return 0;
+}
+
+static int olpc_bat_get_health(union power_supply_propval *val)
+{
+ uint8_t ec_byte;
+ int ret;
+
+ ret = olpc_ec_cmd(EC_BAT_ERRCODE, NULL, 0, &ec_byte, 1);
+ if (ret)
+ return ret;
+
+ switch (ec_byte) {
+ case 0:
+ val->intval = POWER_SUPPLY_HEALTH_GOOD;
+ break;
+
+ case BAT_ERR_OVERTEMP:
+ val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
+ break;
+
+ case BAT_ERR_OVERVOLTAGE:
+ val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ break;
+
+ case BAT_ERR_INFOFAIL:
+ case BAT_ERR_OUT_OF_CONTROL:
+ case BAT_ERR_ID_FAIL:
+ case BAT_ERR_ACR_FAIL:
+ val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ break;
+
+ default:
+ /* Eep. We don't know this failure code */
+ ret = -EIO;
+ }
+
+ return ret;
+}
+
+static int olpc_bat_get_mfr(union power_supply_propval *val)
+{
+ uint8_t ec_byte;
+ int ret;
+
+ ec_byte = BAT_ADDR_MFR_TYPE;
+ ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1);
+ if (ret)
+ return ret;
+
+ switch (ec_byte >> 4) {
+ case 1:
+ val->strval = "Gold Peak";
+ break;
+ case 2:
+ val->strval = "BYD";
+ break;
+ default:
+ val->strval = "Unknown";
+ break;
+ }
+
+ return ret;
+}
+
+static int olpc_bat_get_tech(union power_supply_propval *val)
+{
+ uint8_t ec_byte;
+ int ret;
+
+ ec_byte = BAT_ADDR_MFR_TYPE;
+ ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1);
+ if (ret)
+ return ret;
+
+ switch (ec_byte & 0xf) {
+ case 1:
+ val->intval = POWER_SUPPLY_TECHNOLOGY_NiMH;
+ break;
+ case 2:
+ val->intval = POWER_SUPPLY_TECHNOLOGY_LiFe;
+ break;
+ default:
+ val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
+ break;
+ }
+
+ return ret;
+}
+
+static int olpc_bat_get_charge_full_design(union power_supply_propval *val)
+{
+ uint8_t ec_byte;
+ union power_supply_propval tech;
+ int ret, mfr;
+
+ ret = olpc_bat_get_tech(&tech);
+ if (ret)
+ return ret;
+
+ ec_byte = BAT_ADDR_MFR_TYPE;
+ ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1);
+ if (ret)
+ return ret;
+
+ mfr = ec_byte >> 4;
+
+ switch (tech.intval) {
+ case POWER_SUPPLY_TECHNOLOGY_NiMH:
+ switch (mfr) {
+ case 1: /* Gold Peak */
+ val->intval = 3000000*.8;
+ break;
+ default:
+ return -EIO;
+ }
+ break;
+
+ case POWER_SUPPLY_TECHNOLOGY_LiFe:
+ switch (mfr) {
+ case 1: /* Gold Peak, fall through */
+ case 2: /* BYD */
+ val->intval = 2800000;
+ break;
+ default:
+ return -EIO;
+ }
+ break;
+
+ default:
+ return -EIO;
+ }
+
+ return ret;
+}
+
+static int olpc_bat_get_charge_now(union power_supply_propval *val)
+{
+ uint8_t soc;
+ union power_supply_propval full;
+ int ret;
+
+ ret = olpc_ec_cmd(EC_BAT_SOC, NULL, 0, &soc, 1);
+ if (ret)
+ return ret;
+
+ ret = olpc_bat_get_charge_full_design(&full);
+ if (ret)
+ return ret;
+
+ val->intval = soc * (full.intval / 100);
+ return 0;
+}
+
+static int olpc_bat_get_voltage_max_design(union power_supply_propval *val)
+{
+ uint8_t ec_byte;
+ union power_supply_propval tech;
+ int mfr;
+ int ret;
+
+ ret = olpc_bat_get_tech(&tech);
+ if (ret)
+ return ret;
+
+ ec_byte = BAT_ADDR_MFR_TYPE;
+ ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1);
+ if (ret)
+ return ret;
+
+ mfr = ec_byte >> 4;
+
+ switch (tech.intval) {
+ case POWER_SUPPLY_TECHNOLOGY_NiMH:
+ switch (mfr) {
+ case 1: /* Gold Peak */
+ val->intval = 6000000;
+ break;
+ default:
+ return -EIO;
+ }
+ break;
+
+ case POWER_SUPPLY_TECHNOLOGY_LiFe:
+ switch (mfr) {
+ case 1: /* Gold Peak */
+ val->intval = 6400000;
+ break;
+ case 2: /* BYD */
+ val->intval = 6500000;
+ break;
+ default:
+ return -EIO;
+ }
+ break;
+
+ default:
+ return -EIO;
+ }
+
+ return ret;
+}
+
+static u16 ecword_to_cpu(struct olpc_battery_data *data, u16 ec_word)
+{
+ if (data->little_endian)
+ return le16_to_cpu((__force __le16)ec_word);
+ else
+ return be16_to_cpu((__force __be16)ec_word);
+}
+
+/*********************************************************************
+ * Battery properties
+ *********************************************************************/
+static int olpc_bat_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct olpc_battery_data *data = power_supply_get_drvdata(psy);
+ int ret = 0;
+ u16 ec_word;
+ uint8_t ec_byte;
+ __be64 ser_buf;
+
+ ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &ec_byte, 1);
+ if (ret)
+ return ret;
+
+ /* Theoretically there's a race here -- the battery could be
+ removed immediately after we check whether it's present, and
+ then we query for some other property of the now-absent battery.
+ It doesn't matter though -- the EC will return the last-known
+ information, and it's as if we just ran that _little_ bit faster
+ and managed to read it out before the battery went away. */
+ if (!(ec_byte & (BAT_STAT_PRESENT | BAT_STAT_TRICKLE)) &&
+ psp != POWER_SUPPLY_PROP_PRESENT)
+ return -ENODEV;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ ret = olpc_bat_get_status(data, val, ec_byte);
+ if (ret)
+ return ret;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_TYPE:
+ if (ec_byte & BAT_STAT_TRICKLE)
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+ else if (ec_byte & BAT_STAT_CHARGING)
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
+ else
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
+ break;
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = !!(ec_byte & (BAT_STAT_PRESENT |
+ BAT_STAT_TRICKLE));
+ break;
+
+ case POWER_SUPPLY_PROP_HEALTH:
+ if (ec_byte & BAT_STAT_DESTROY)
+ val->intval = POWER_SUPPLY_HEALTH_DEAD;
+ else {
+ ret = olpc_bat_get_health(val);
+ if (ret)
+ return ret;
+ }
+ break;
+
+ case POWER_SUPPLY_PROP_MANUFACTURER:
+ ret = olpc_bat_get_mfr(val);
+ if (ret)
+ return ret;
+ break;
+ case POWER_SUPPLY_PROP_TECHNOLOGY:
+ ret = olpc_bat_get_tech(val);
+ if (ret)
+ return ret;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_AVG:
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ ret = olpc_ec_cmd(EC_BAT_VOLTAGE, NULL, 0, (void *)&ec_word, 2);
+ if (ret)
+ return ret;
+
+ val->intval = ecword_to_cpu(data, ec_word) * 9760L / 32;
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_AVG:
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ ret = olpc_ec_cmd(EC_BAT_CURRENT, NULL, 0, (void *)&ec_word, 2);
+ if (ret)
+ return ret;
+
+ val->intval = ecword_to_cpu(data, ec_word) * 15625L / 120;
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY:
+ ret = olpc_ec_cmd(EC_BAT_SOC, NULL, 0, &ec_byte, 1);
+ if (ret)
+ return ret;
+ val->intval = ec_byte;
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
+ if (ec_byte & BAT_STAT_FULL)
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
+ else if (ec_byte & BAT_STAT_LOW)
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
+ else
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
+ ret = olpc_bat_get_charge_full_design(val);
+ if (ret)
+ return ret;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_NOW:
+ ret = olpc_bat_get_charge_now(val);
+ if (ret)
+ return ret;
+ break;
+ case POWER_SUPPLY_PROP_TEMP:
+ ret = olpc_ec_cmd(EC_BAT_TEMP, NULL, 0, (void *)&ec_word, 2);
+ if (ret)
+ return ret;
+
+ val->intval = ecword_to_cpu(data, ec_word) * 10 / 256;
+ break;
+ case POWER_SUPPLY_PROP_TEMP_AMBIENT:
+ ret = olpc_ec_cmd(EC_AMB_TEMP, NULL, 0, (void *)&ec_word, 2);
+ if (ret)
+ return ret;
+
+ val->intval = (int)ecword_to_cpu(data, ec_word) * 10 / 256;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_COUNTER:
+ ret = olpc_ec_cmd(EC_BAT_ACR, NULL, 0, (void *)&ec_word, 2);
+ if (ret)
+ return ret;
+
+ val->intval = ecword_to_cpu(data, ec_word) * 6250 / 15;
+ break;
+ case POWER_SUPPLY_PROP_SERIAL_NUMBER:
+ ret = olpc_ec_cmd(EC_BAT_SERIAL, NULL, 0, (void *)&ser_buf, 8);
+ if (ret)
+ return ret;
+
+ sprintf(data->bat_serial, "%016llx", (long long)be64_to_cpu(ser_buf));
+ val->strval = data->bat_serial;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+ ret = olpc_bat_get_voltage_max_design(val);
+ if (ret)
+ return ret;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static enum power_supply_property olpc_xo1_bat_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_CHARGE_TYPE,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_TECHNOLOGY,
+ POWER_SUPPLY_PROP_VOLTAGE_AVG,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_CURRENT_AVG,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_CAPACITY_LEVEL,
+ POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+ POWER_SUPPLY_PROP_CHARGE_NOW,
+ POWER_SUPPLY_PROP_TEMP,
+ POWER_SUPPLY_PROP_TEMP_AMBIENT,
+ POWER_SUPPLY_PROP_MANUFACTURER,
+ POWER_SUPPLY_PROP_SERIAL_NUMBER,
+ POWER_SUPPLY_PROP_CHARGE_COUNTER,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
+};
+
+/* XO-1.5 does not have ambient temperature property */
+static enum power_supply_property olpc_xo15_bat_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_CHARGE_TYPE,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_TECHNOLOGY,
+ POWER_SUPPLY_PROP_VOLTAGE_AVG,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_CURRENT_AVG,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_CAPACITY_LEVEL,
+ POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+ POWER_SUPPLY_PROP_CHARGE_NOW,
+ POWER_SUPPLY_PROP_TEMP,
+ POWER_SUPPLY_PROP_MANUFACTURER,
+ POWER_SUPPLY_PROP_SERIAL_NUMBER,
+ POWER_SUPPLY_PROP_CHARGE_COUNTER,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
+};
+
+/* EEPROM reading goes completely around the power_supply API, sadly */
+
+#define EEPROM_START 0x20
+#define EEPROM_END 0x80
+#define EEPROM_SIZE (EEPROM_END - EEPROM_START)
+
+static ssize_t olpc_bat_eeprom_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *attr, char *buf, loff_t off, size_t count)
+{
+ uint8_t ec_byte;
+ int ret;
+ int i;
+
+ for (i = 0; i < count; i++) {
+ ec_byte = EEPROM_START + off + i;
+ ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &buf[i], 1);
+ if (ret) {
+ pr_err("olpc-battery: "
+ "EC_BAT_EEPROM cmd @ 0x%x failed - %d!\n",
+ ec_byte, ret);
+ return -EIO;
+ }
+ }
+
+ return count;
+}
+
+static struct bin_attribute olpc_bat_eeprom = {
+ .attr = {
+ .name = "eeprom",
+ .mode = S_IRUGO,
+ },
+ .size = EEPROM_SIZE,
+ .read = olpc_bat_eeprom_read,
+};
+
+/* Allow userspace to see the specific error value pulled from the EC */
+
+static ssize_t olpc_bat_error_read(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ uint8_t ec_byte;
+ ssize_t ret;
+
+ ret = olpc_ec_cmd(EC_BAT_ERRCODE, NULL, 0, &ec_byte, 1);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%d\n", ec_byte);
+}
+
+static struct device_attribute olpc_bat_error = {
+ .attr = {
+ .name = "error",
+ .mode = S_IRUGO,
+ },
+ .show = olpc_bat_error_read,
+};
+
+static struct attribute *olpc_bat_sysfs_attrs[] = {
+ &olpc_bat_error.attr,
+ NULL
+};
+
+static struct bin_attribute *olpc_bat_sysfs_bin_attrs[] = {
+ &olpc_bat_eeprom,
+ NULL
+};
+
+static const struct attribute_group olpc_bat_sysfs_group = {
+ .attrs = olpc_bat_sysfs_attrs,
+ .bin_attrs = olpc_bat_sysfs_bin_attrs,
+
+};
+
+static const struct attribute_group *olpc_bat_sysfs_groups[] = {
+ &olpc_bat_sysfs_group,
+ NULL
+};
+
+/*********************************************************************
+ * Initialisation
+ *********************************************************************/
+
+static struct power_supply_desc olpc_bat_desc = {
+ .name = "olpc_battery",
+ .get_property = olpc_bat_get_property,
+ .use_for_apm = 1,
+};
+
+static int olpc_battery_suspend(struct platform_device *pdev,
+ pm_message_t state)
+{
+ struct olpc_battery_data *data = platform_get_drvdata(pdev);
+
+ if (device_may_wakeup(&data->olpc_ac->dev))
+ olpc_ec_wakeup_set(EC_SCI_SRC_ACPWR);
+ else
+ olpc_ec_wakeup_clear(EC_SCI_SRC_ACPWR);
+
+ if (device_may_wakeup(&data->olpc_bat->dev))
+ olpc_ec_wakeup_set(EC_SCI_SRC_BATTERY | EC_SCI_SRC_BATSOC
+ | EC_SCI_SRC_BATERR);
+ else
+ olpc_ec_wakeup_clear(EC_SCI_SRC_BATTERY | EC_SCI_SRC_BATSOC
+ | EC_SCI_SRC_BATERR);
+
+ return 0;
+}
+
+static int olpc_battery_probe(struct platform_device *pdev)
+{
+ struct power_supply_config bat_psy_cfg = {};
+ struct power_supply_config ac_psy_cfg = {};
+ struct olpc_battery_data *data;
+ struct device_node *np;
+ uint8_t status;
+ uint8_t ecver;
+ int ret;
+
+ data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, data);
+
+ /* See if the EC is already there and get the EC revision */
+ ret = olpc_ec_cmd(EC_FIRMWARE_REV, NULL, 0, &ecver, 1);
+ if (ret)
+ return ret;
+
+ np = of_find_compatible_node(NULL, NULL, "olpc,xo1.75-ec");
+ if (np) {
+ of_node_put(np);
+ /* XO 1.75 */
+ data->new_proto = true;
+ data->little_endian = true;
+ } else if (ecver > 0x44) {
+ /* XO 1 or 1.5 with a new EC firmware. */
+ data->new_proto = true;
+ } else if (ecver < 0x44) {
+ /*
+ * We've seen a number of EC protocol changes; this driver
+ * requires the latest EC protocol, supported by 0x44 and above.
+ */
+ printk(KERN_NOTICE "OLPC EC version 0x%02x too old for "
+ "battery driver.\n", ecver);
+ return -ENXIO;
+ }
+
+ ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &status, 1);
+ if (ret)
+ return ret;
+
+ /* Ignore the status. It doesn't actually matter */
+
+ ac_psy_cfg.of_node = pdev->dev.of_node;
+ ac_psy_cfg.drv_data = data;
+
+ data->olpc_ac = devm_power_supply_register(&pdev->dev, &olpc_ac_desc,
+ &ac_psy_cfg);
+ if (IS_ERR(data->olpc_ac))
+ return PTR_ERR(data->olpc_ac);
+
+ if (of_device_is_compatible(pdev->dev.of_node, "olpc,xo1.5-battery")) {
+ /* XO-1.5 */
+ olpc_bat_desc.properties = olpc_xo15_bat_props;
+ olpc_bat_desc.num_properties = ARRAY_SIZE(olpc_xo15_bat_props);
+ } else {
+ /* XO-1 */
+ olpc_bat_desc.properties = olpc_xo1_bat_props;
+ olpc_bat_desc.num_properties = ARRAY_SIZE(olpc_xo1_bat_props);
+ }
+
+ bat_psy_cfg.of_node = pdev->dev.of_node;
+ bat_psy_cfg.drv_data = data;
+ bat_psy_cfg.attr_grp = olpc_bat_sysfs_groups;
+
+ data->olpc_bat = devm_power_supply_register(&pdev->dev, &olpc_bat_desc,
+ &bat_psy_cfg);
+ if (IS_ERR(data->olpc_bat))
+ return PTR_ERR(data->olpc_bat);
+
+ if (olpc_ec_wakeup_available()) {
+ device_set_wakeup_capable(&data->olpc_ac->dev, true);
+ device_set_wakeup_capable(&data->olpc_bat->dev, true);
+ }
+
+ return 0;
+}
+
+static const struct of_device_id olpc_battery_ids[] = {
+ { .compatible = "olpc,xo1-battery" },
+ { .compatible = "olpc,xo1.5-battery" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, olpc_battery_ids);
+
+static struct platform_driver olpc_battery_driver = {
+ .driver = {
+ .name = "olpc-battery",
+ .of_match_table = olpc_battery_ids,
+ },
+ .probe = olpc_battery_probe,
+ .suspend = olpc_battery_suspend,
+};
+
+module_platform_driver(olpc_battery_driver);
+
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Battery driver for One Laptop Per Child 'XO' machine");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-29 11:01:37 +0000