This patch adds bq27000 battery moniter HDQ slave driver support.
Signed-off-by: Madhusudhan Chikkature<madhu.cr@xxxxxx>
---
drivers/w1/slaves/Kconfig | 8 ++
drivers/w1/slaves/Makefile | 2
drivers/w1/slaves/w1_bq27000.c | 120 +++++++++++++++++++++++++++++++++++++++++
drivers/w1/w1.h | 1
drivers/w1/w1_io.c | 3 -
5 files changed, 132 insertions(+), 2 deletions(-)
Index: linux-omap-2.6/drivers/w1/slaves/w1_bq27000.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-omap-2.6/drivers/w1/slaves/w1_bq27000.c 2007-12-18 12:42:50.359880373 +0530
@@ -0,0 +1,120 @@
+/*
+ * 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)
+
+int F_ID;
+int family_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("omap-bq2700-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_LICENSE("GPL");
+MODULE_AUTHOR("Texas Instruments Ltd");
+MODULE_DESCRIPTION("HDQ/1-wire slave driver bq27000 battery monitor chip");
Index: linux-omap-2.6/drivers/w1/slaves/Kconfig
===================================================================
--- linux-omap-2.6.orig/drivers/w1/slaves/Kconfig 2007-12-18 12:29:14.487874219 +0530
+++ linux-omap-2.6/drivers/w1/slaves/Kconfig 2007-12-18 12:40:26.399520989 +0530
@@ -44,4 +44,12 @@
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
Index: linux-omap-2.6/drivers/w1/slaves/Makefile
===================================================================
--- linux-omap-2.6.orig/drivers/w1/slaves/Makefile 2007-12-18 12:29:14.488874187 +0530
+++ linux-omap-2.6/drivers/w1/slaves/Makefile 2007-12-18 12:40:26.399520989 +0530
@@ -6,4 +6,4 @@
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
Index: linux-omap-2.6/drivers/w1/w1_io.c
===================================================================
--- linux-omap-2.6.orig/drivers/w1/w1_io.c 2007-12-18 12:29:14.487874219 +0530
+++ linux-omap-2.6/drivers/w1/w1_io.c 2007-12-18 12:40:26.411520602 +0530
@@ -177,7 +177,7 @@
* @param dev the master device
* @return the byte read
*/
-static u8 w1_read_8(struct w1_master * dev)
+u8 w1_read_8(struct w1_master *dev)
{
int i;
u8 res = 0;
@@ -190,6 +190,7 @@
return res;
}
+EXPORT_SYMBOL_GPL(w1_read_8);
/**
* Writes a series of bytes.
Index: linux-omap-2.6/drivers/w1/w1.h
===================================================================
--- linux-omap-2.6.orig/drivers/w1/w1.h 2007-12-18 12:29:14.487874219 +0530
+++ linux-omap-2.6/drivers/w1/w1.h 2007-12-18 12:40:26.417520409 +0530
@@ -189,6 +189,7 @@
u8 w1_triplet(struct w1_master *dev, int bdir);
void w1_write_8(struct w1_master *, u8);
+u8 w1_read_8(struct w1_master *);
int w1_reset_bus(struct w1_master *);
u8 w1_calc_crc8(u8 *, int);
void w1_write_block(struct w1_master *, const u8 *, int);
-
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