diff options
Diffstat (limited to 'drivers/w1')
| -rw-r--r-- | drivers/w1/slaves/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/w1/slaves/Makefile | 2 | ||||
| -rw-r--r-- | drivers/w1/slaves/w1_bq27000.c | 123 |
3 files changed, 131 insertions, 1 deletions
diff --git a/drivers/w1/slaves/Kconfig b/drivers/w1/slaves/Kconfig index 3df29a1..8d0b1fb 100644 --- a/drivers/w1/slaves/Kconfig +++ b/drivers/w1/slaves/Kconfig @@ -44,4 +44,11 @@ config W1_SLAVE_DS2760 If you are unsure, say N. +config W1_SLAVE_BQ27000 + tristate "BQ27000 slave support" + depends on W1 + help + Say Y here if you want to use a hdq + bq27000 slave support. + endmenu diff --git a/drivers/w1/slaves/Makefile b/drivers/w1/slaves/Makefile index a8eb752..990f400 100644 --- a/drivers/w1/slaves/Makefile +++ b/drivers/w1/slaves/Makefile @@ -6,4 +6,4 @@ obj-$(CONFIG_W1_SLAVE_THERM) += w1_therm.o obj-$(CONFIG_W1_SLAVE_SMEM) += w1_smem.o obj-$(CONFIG_W1_SLAVE_DS2433) += w1_ds2433.o obj-$(CONFIG_W1_SLAVE_DS2760) += w1_ds2760.o - +obj-$(CONFIG_W1_SLAVE_BQ27000) += w1_bq27000.o diff --git a/drivers/w1/slaves/w1_bq27000.c b/drivers/w1/slaves/w1_bq27000.c new file mode 100644 index 0000000..8f4c91f --- /dev/null +++ b/drivers/w1/slaves/w1_bq27000.c @@ -0,0 +1,123 @@ +/* + * drivers/w1/slaves/w1_bq27000.c + * + * 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 "../w1.h" +#include "../w1_int.h" +#include "../w1_family.h" + +#define HDQ_CMD_READ (0) +#define HDQ_CMD_WRITE (1<<7) + +static int F_ID; + +void w1_bq27000_write(struct device *dev, u8 buf, u8 reg) +{ + struct w1_slave *sl = container_of(dev, struct w1_slave, dev); + + if (!dev) { + pr_info("Could not obtain slave dev ptr\n"); + return; + } + + w1_write_8(sl->master, HDQ_CMD_WRITE | reg); + w1_write_8(sl->master, buf); +} +EXPORT_SYMBOL(w1_bq27000_write); + +int w1_bq27000_read(struct device *dev, u8 reg) +{ + u8 val; + struct w1_slave *sl = container_of(dev, struct w1_slave, dev); + + if (!dev) + return 0; + + w1_write_8(sl->master, HDQ_CMD_READ | reg); + val = w1_read_8(sl->master); + + return val; +} +EXPORT_SYMBOL(w1_bq27000_read); + +static int w1_bq27000_add_slave(struct w1_slave *sl) +{ + int ret; + int id = 1; + struct platform_device *pdev; + + pdev = platform_device_alloc("bq27000-battery", id); + if (!pdev) { + ret = -ENOMEM; + return ret; + } + 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_unregister(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 = 1, + .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_param(F_ID, int, S_IRUSR); +MODULE_PARM_DESC(F_ID, "1-wire slave FID for BQ device"); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Texas Instruments Ltd"); +MODULE_DESCRIPTION("HDQ/1-wire slave driver bq27000 battery monitor chip"); |
