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authorSebastian Reichel <sebastian.reichel@collabora.co.uk>2017-07-25 15:18:27 +0200
committerSebastian Reichel <sebastian.reichel@collabora.co.uk>2017-07-25 15:18:27 +0200
commitc8143b72888c551bc4119f52d818343945f969d4 (patch)
tree3248876df339288a05fdafa8b5e78d8a3295bb01 /drivers/power/supply
parentpower: supply: ltc2941-battery-gauge: Add LTC2944 support (diff)
parentpower: supply: move HDQ interface for bq27xxx from w1 to power/supply (diff)
downloadlinux-c8143b72888c551bc4119f52d818343945f969d4.tar.xz
linux-c8143b72888c551bc4119f52d818343945f969d4.zip
Merge branch 'psy-w1-for-v4.14-immutable' into for-next
Merge immutable branch moving bq27000 driver from w1 subsystem into power-supply subsystem. Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Diffstat (limited to 'drivers/power/supply')
-rw-r--r--drivers/power/supply/Kconfig9
-rw-r--r--drivers/power/supply/Makefile1
-rw-r--r--drivers/power/supply/bq27xxx_battery_hdq.c115
3 files changed, 125 insertions, 0 deletions
diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 6a8bab7ae27b..5ab90c1f3f7c 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -198,6 +198,15 @@ config BATTERY_BQ27XXX_I2C
Say Y here to enable support for batteries with BQ27xxx chips
connected over an I2C bus.
+config BATTERY_BQ27XXX_HDQ
+ tristate "BQ27xxx HDQ support"
+ depends on BATTERY_BQ27XXX
+ depends on W1
+ default y
+ help
+ Say Y here to enable support for batteries with BQ27xxx chips
+ connected over an HDQ bus.
+
config BATTERY_BQ27XXX_DT_UPDATES_NVM
bool "BQ27xxx support for update of NVM/flash data memory"
depends on BATTERY_BQ27XXX_I2C
diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
index 509131673355..621a19058fec 100644
--- a/drivers/power/supply/Makefile
+++ b/drivers/power/supply/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_BATTERY_SBS) += sbs-battery.o
obj-$(CONFIG_CHARGER_SBS) += sbs-charger.o
obj-$(CONFIG_BATTERY_BQ27XXX) += bq27xxx_battery.o
obj-$(CONFIG_BATTERY_BQ27XXX_I2C) += bq27xxx_battery_i2c.o
+obj-$(CONFIG_BATTERY_BQ27XXX_HDQ) += bq27xxx_battery_hdq.o
obj-$(CONFIG_BATTERY_DA9030) += da9030_battery.o
obj-$(CONFIG_BATTERY_DA9052) += da9052-battery.o
obj-$(CONFIG_CHARGER_DA9150) += da9150-charger.o
diff --git a/drivers/power/supply/bq27xxx_battery_hdq.c b/drivers/power/supply/bq27xxx_battery_hdq.c
new file mode 100644
index 000000000000..f4df67eb9d2c
--- /dev/null
+++ b/drivers/power/supply/bq27xxx_battery_hdq.c
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2007 Texas Instruments, Inc.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/types.h>
+#include <linux/platform_device.h>
+#include <linux/mutex.h>
+#include <linux/power/bq27xxx_battery.h>
+
+#include <linux/w1.h>
+
+#define W1_FAMILY_BQ27000 0x01
+
+#define HDQ_CMD_READ (0)
+#define HDQ_CMD_WRITE (1<<7)
+
+static int F_ID;
+module_param(F_ID, int, S_IRUSR);
+MODULE_PARM_DESC(F_ID, "1-wire slave FID for BQ device");
+
+static int w1_bq27000_read(struct device *dev, unsigned int reg)
+{
+ u8 val;
+ struct w1_slave *sl = container_of(dev->parent, struct w1_slave, dev);
+
+ mutex_lock(&sl->master->bus_mutex);
+ w1_write_8(sl->master, HDQ_CMD_READ | reg);
+ val = w1_read_8(sl->master);
+ mutex_unlock(&sl->master->bus_mutex);
+
+ return val;
+}
+
+static struct bq27xxx_platform_data bq27000_battery_info = {
+ .read = w1_bq27000_read,
+ .name = "bq27000-battery",
+ .chip = BQ27000,
+};
+
+static int w1_bq27000_add_slave(struct w1_slave *sl)
+{
+ int ret;
+ struct platform_device *pdev;
+
+ pdev = platform_device_alloc("bq27000-battery", -1);
+ if (!pdev) {
+ ret = -ENOMEM;
+ return ret;
+ }
+ ret = platform_device_add_data(pdev,
+ &bq27000_battery_info,
+ sizeof(bq27000_battery_info));
+ if (ret)
+ goto pdev_add_failed;
+ pdev->dev.parent = &sl->dev;
+
+ ret = platform_device_add(pdev);
+ if (ret)
+ goto pdev_add_failed;
+
+ dev_set_drvdata(&sl->dev, pdev);
+
+ goto success;
+
+pdev_add_failed:
+ platform_device_put(pdev);
+success:
+ return ret;
+}
+
+static void w1_bq27000_remove_slave(struct w1_slave *sl)
+{
+ struct platform_device *pdev = dev_get_drvdata(&sl->dev);
+
+ platform_device_unregister(pdev);
+}
+
+static struct w1_family_ops w1_bq27000_fops = {
+ .add_slave = w1_bq27000_add_slave,
+ .remove_slave = w1_bq27000_remove_slave,
+};
+
+static struct w1_family w1_bq27000_family = {
+ .fid = W1_FAMILY_BQ27000,
+ .fops = &w1_bq27000_fops,
+};
+
+static int __init w1_bq27000_init(void)
+{
+ if (F_ID)
+ w1_bq27000_family.fid = F_ID;
+
+ return w1_register_family(&w1_bq27000_family);
+}
+
+static void __exit w1_bq27000_exit(void)
+{
+ w1_unregister_family(&w1_bq27000_family);
+}
+
+module_init(w1_bq27000_init);
+module_exit(w1_bq27000_exit);
+
+MODULE_AUTHOR("Texas Instruments Ltd");
+MODULE_DESCRIPTION("HDQ/1-wire slave driver bq27000 battery monitor chip");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("w1-family-" __stringify(W1_FAMILY_BQ27000));