1 files changed, 125 insertions, 0 deletions
diff --git a/drivers/w1/slaves/w1_ds2438.h b/drivers/w1/slaves/w1_ds2438.h
new file mode 100644
index 000000000000..b9fb73cafea4
--- /dev/null
+++ b/drivers/w1/slaves/w1_ds2438.h
@@ -0,0 +1,125 @@
+/*
+ * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#ifndef __W1_DS2438_H__
+#define __W1_DS2438_H__
+
+#include <asm/types.h>
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+#include <linux/types.h>
+
+#define DS2438_DEV_NAME	"ds2438-battery"
+
+#define DS2438_PAGE_SIZE	8
+#define DS2438_PAGE_NUM		8
+
+#define DS2438_CONVERT_TEMP	0x44
+#define DS2438_CONVERT_VOLT	0xB4
+#define DS2438_WRITE_SCRATCHPAD	0x4E
+#define DS2438_COPY_SCRATCHPAD	0x48
+#define DS2438_RECALL_MEMORY	0xB8
+
+enum DS2438_PAGE {
+	PAGE0_CONTROL = 0,
+	PAGE1_ETM,
+	PAGE2_STAMP,
+	PAGE3_RESV3,
+	PAGE4_RESV4,
+	PAGE5_RESV5,
+	PAGE6_RESV6,
+	PAGE7_CCA,
+};
+
+enum DS2438_REG {
+	/* PAGE 0 */
+	PAGE0_STAT_CTRL = 0,
+	PAGE0_TEMP_LSB = 1,
+	PAGE0_TEMP_MSB = 2,
+	PAGE0_VOLTAGE_LSB = 3,
+	PAGE0_VOLTAGE_MSB = 4,
+	PAGE0_CURRENT_LSB = 5,
+	PAGE0_CURRENT_MSB = 6,
+	PAGE0_THRESHOLD = 7,
+
+	/* PAGE 1 */
+	PAGE1_ETM_BYTE0 = 0,
+	PAGE1_ETM_BYTE1 = 1,
+	PAGE1_ETM_BYTE2 = 2,
+	PAGE1_ETM_BYTE3 = 3,
+	PAGE1_ICA = 4,
+	PAGE1_OFFSET_LSB = 5,
+	PAGE1_OFFSET_MSB = 6,
+
+	/* PAGE 2 */
+	PAGE2_DISCONNECT_BYTE0 = 0,
+	PAGE2_DISCONNECT_BYTE1 = 1,
+	PAGE2_DISCONNECT_BYTE2 = 2,
+	PAGE2_DISCONNECT_BYTE3 = 3,
+	PAGE2_END_CHARGE_BYTE0 = 4,
+	PAGE2_END_CHARGE_BYTE1 = 5,
+	PAGE2_END_CHARGE_BYTE2 = 6,
+	PAGE2_END_CHARGE_BYTE3 = 7,
+
+	/* PAGE 3 */
+	/* PAGE 4 */
+	/* PAGE 5 */
+	/* PAGE 6 */
+	/* PAGE 7 */
+	PAGE7_CCA_LSB = 4,
+	PAGE7_CCA_MSB = 5,
+	PAGE7_DCA_LSB = 6,
+	PAGE7_DCA_MSB = 7,
+};
+
+#define DS2438_CTRL_IAD		(1 << 0)
+#define DS2438_CTRL_CA		(1 << 1)
+#define DS2438_CTRL_EE		(1 << 2)
+#define DS2438_CTRL_AD		(1 << 3)
+#define DS2438_STAT_TB		(1 << 4)
+#define DS2438_STAT_NVB		(1 << 5)
+#define DS2438_STAT_ADB		(1 << 6)
+
+struct ds2438_ops {
+	int (*read_page) (struct device *, u8, u8 *);
+	int (*read_byte) (struct device *, u8, u8, u8 *);
+	int (*read_halfword) (struct device *, u8, u8, u16 *);
+	int (*read_word) (struct device *, u8, u8, u32 *);
+	int (*write_page) (struct device *, u8, u8 *);
+	int (*write_byte) (struct device *, u8, u8, u8);
+	int (*write_halfword) (struct device *, u8, u8, u16);
+	int (*write_word) (struct device *, u8, u8, u32);
+	int (*drain_sram) (struct device *, u8);
+	int (*load_sram) (struct device *, u8);
+	int (*command) (struct device *, u8, u8);
+};
+
+static inline u16 ds2438_readw(u8 *raw)
+{
+	return ((*(raw + 1)) << 8) | (*raw);
+}
+
+static inline void ds2438_writew(u8 *raw, u16 data)
+{
+	*raw++ = data & 0xFF;
+	*raw = (data >> 8) & 0xFF;
+}
+
+extern int w1_ds2438_read_page(struct device *dev, u8 page, u8 *buf);
+extern int w1_ds2438_write_page(struct device *dev, u8 page, u8 *buf);
+extern int w1_ds2438_command(struct device *dev, u8 command, u8 data);
+extern int w1_ds2438_drain_sram(struct device *dev, u8 page);
+extern int w1_ds2438_load_sram(struct device *dev, u8 page);
+#endif				/* __W1_DS2438_H__ */