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-rw-r--r--drivers/mfd/wm831x-core.c4
-rw-r--r--drivers/mfd/wm831x-otp.c83
-rw-r--r--include/linux/mfd/wm831x/otp.h162
3 files changed, 249 insertions, 0 deletions
diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c
index bc40ea315cc..33eaea2f988 100644
--- a/drivers/mfd/wm831x-core.c
+++ b/drivers/mfd/wm831x-core.c
@@ -23,6 +23,7 @@
#include <linux/mfd/wm831x/pdata.h>
#include <linux/mfd/wm831x/irq.h>
#include <linux/mfd/wm831x/auxadc.h>
+#include <linux/mfd/wm831x/otp.h>
enum wm831x_parent {
WM8310 = 0,
@@ -1340,6 +1341,8 @@ static int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
ret);
}
+ wm831x_otp_init(wm831x);
+
if (pdata && pdata->post_init) {
ret = pdata->post_init(wm831x);
if (ret != 0) {
@@ -1360,6 +1363,7 @@ err:
static void wm831x_device_exit(struct wm831x *wm831x)
{
+ wm831x_otp_exit(wm831x);
mfd_remove_devices(wm831x->dev);
wm831x_irq_exit(wm831x);
kfree(wm831x);
diff --git a/drivers/mfd/wm831x-otp.c b/drivers/mfd/wm831x-otp.c
new file mode 100644
index 00000000000..f742745ff35
--- /dev/null
+++ b/drivers/mfd/wm831x-otp.c
@@ -0,0 +1,83 @@
+/*
+ * wm831x-otp.c -- OTP for Wolfson WM831x PMICs
+ *
+ * Copyright 2009 Wolfson Microelectronics PLC.
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/bcd.h>
+#include <linux/delay.h>
+#include <linux/mfd/core.h>
+
+#include <linux/mfd/wm831x/core.h>
+#include <linux/mfd/wm831x/otp.h>
+
+/* In bytes */
+#define WM831X_UNIQUE_ID_LEN 16
+
+/* Read the unique ID from the chip into id */
+static int wm831x_unique_id_read(struct wm831x *wm831x, char *id)
+{
+ int i, val;
+
+ for (i = 0; i < WM831X_UNIQUE_ID_LEN / 2; i++) {
+ val = wm831x_reg_read(wm831x, WM831X_UNIQUE_ID_1 + i);
+ if (val < 0)
+ return val;
+
+ id[i * 2] = (val >> 8) & 0xff;
+ id[(i * 2) + 1] = val & 0xff;
+ }
+
+ return 0;
+}
+
+static ssize_t wm831x_unique_id_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct wm831x *wm831x = dev_get_drvdata(dev);
+ int i, rval;
+ char id[WM831X_UNIQUE_ID_LEN];
+ ssize_t ret = 0;
+
+ rval = wm831x_unique_id_read(wm831x, id);
+ if (rval < 0)
+ return 0;
+
+ for (i = 0; i < WM831X_UNIQUE_ID_LEN; i++)
+ ret += sprintf(&buf[ret], "%02x", buf[i]);
+
+ ret += sprintf(&buf[ret], "\n");
+
+ return ret;
+}
+
+static DEVICE_ATTR(unique_id, 0444, wm831x_unique_id_show, NULL);
+
+int wm831x_otp_init(struct wm831x *wm831x)
+{
+ int ret;
+
+ ret = device_create_file(wm831x->dev, &dev_attr_unique_id);
+ if (ret != 0)
+ dev_err(wm831x->dev, "Unique ID attribute not created: %d\n",
+ ret);
+
+ return ret;
+}
+
+void wm831x_otp_exit(struct wm831x *wm831x)
+{
+ device_remove_file(wm831x->dev, &dev_attr_unique_id);
+}
+
diff --git a/include/linux/mfd/wm831x/otp.h b/include/linux/mfd/wm831x/otp.h
new file mode 100644
index 00000000000..ce1f81a39bf
--- /dev/null
+++ b/include/linux/mfd/wm831x/otp.h
@@ -0,0 +1,162 @@
+/*
+ * include/linux/mfd/wm831x/otp.h -- OTP interface for WM831x
+ *
+ * Copyright 2009 Wolfson Microelectronics PLC.
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#ifndef __MFD_WM831X_OTP_H__
+#define __MFD_WM831X_OTP_H__
+
+int wm831x_otp_init(struct wm831x *wm831x);
+void wm831x_otp_exit(struct wm831x *wm831x);
+
+/*
+ * R30720 (0x7800) - Unique ID 1
+ */
+#define WM831X_UNIQUE_ID_MASK 0xFFFF /* UNIQUE_ID - [15:0] */
+#define WM831X_UNIQUE_ID_SHIFT 0 /* UNIQUE_ID - [15:0] */
+#define WM831X_UNIQUE_ID_WIDTH 16 /* UNIQUE_ID - [15:0] */
+
+/*
+ * R30721 (0x7801) - Unique ID 2
+ */
+#define WM831X_UNIQUE_ID_MASK 0xFFFF /* UNIQUE_ID - [15:0] */
+#define WM831X_UNIQUE_ID_SHIFT 0 /* UNIQUE_ID - [15:0] */
+#define WM831X_UNIQUE_ID_WIDTH 16 /* UNIQUE_ID - [15:0] */
+
+/*
+ * R30722 (0x7802) - Unique ID 3
+ */
+#define WM831X_UNIQUE_ID_MASK 0xFFFF /* UNIQUE_ID - [15:0] */
+#define WM831X_UNIQUE_ID_SHIFT 0 /* UNIQUE_ID - [15:0] */
+#define WM831X_UNIQUE_ID_WIDTH 16 /* UNIQUE_ID - [15:0] */
+
+/*
+ * R30723 (0x7803) - Unique ID 4
+ */
+#define WM831X_UNIQUE_ID_MASK 0xFFFF /* UNIQUE_ID - [15:0] */
+#define WM831X_UNIQUE_ID_SHIFT 0 /* UNIQUE_ID - [15:0] */
+#define WM831X_UNIQUE_ID_WIDTH 16 /* UNIQUE_ID - [15:0] */
+
+/*
+ * R30724 (0x7804) - Unique ID 5
+ */
+#define WM831X_UNIQUE_ID_MASK 0xFFFF /* UNIQUE_ID - [15:0] */
+#define WM831X_UNIQUE_ID_SHIFT 0 /* UNIQUE_ID - [15:0] */
+#define WM831X_UNIQUE_ID_WIDTH 16 /* UNIQUE_ID - [15:0] */
+
+/*
+ * R30725 (0x7805) - Unique ID 6
+ */
+#define WM831X_UNIQUE_ID_MASK 0xFFFF /* UNIQUE_ID - [15:0] */
+#define WM831X_UNIQUE_ID_SHIFT 0 /* UNIQUE_ID - [15:0] */
+#define WM831X_UNIQUE_ID_WIDTH 16 /* UNIQUE_ID - [15:0] */
+
+/*
+ * R30726 (0x7806) - Unique ID 7
+ */
+#define WM831X_UNIQUE_ID_MASK 0xFFFF /* UNIQUE_ID - [15:0] */
+#define WM831X_UNIQUE_ID_SHIFT 0 /* UNIQUE_ID - [15:0] */
+#define WM831X_UNIQUE_ID_WIDTH 16 /* UNIQUE_ID - [15:0] */
+
+/*
+ * R30727 (0x7807) - Unique ID 8
+ */
+#define WM831X_UNIQUE_ID_MASK 0xFFFF /* UNIQUE_ID - [15:0] */
+#define WM831X_UNIQUE_ID_SHIFT 0 /* UNIQUE_ID - [15:0] */
+#define WM831X_UNIQUE_ID_WIDTH 16 /* UNIQUE_ID - [15:0] */
+
+/*
+ * R30728 (0x7808) - Factory OTP ID
+ */
+#define WM831X_OTP_FACT_ID_MASK 0xFFFE /* OTP_FACT_ID - [15:1] */
+#define WM831X_OTP_FACT_ID_SHIFT 1 /* OTP_FACT_ID - [15:1] */
+#define WM831X_OTP_FACT_ID_WIDTH 15 /* OTP_FACT_ID - [15:1] */
+#define WM831X_OTP_FACT_FINAL 0x0001 /* OTP_FACT_FINAL */
+#define WM831X_OTP_FACT_FINAL_MASK 0x0001 /* OTP_FACT_FINAL */
+#define WM831X_OTP_FACT_FINAL_SHIFT 0 /* OTP_FACT_FINAL */
+#define WM831X_OTP_FACT_FINAL_WIDTH 1 /* OTP_FACT_FINAL */
+
+/*
+ * R30729 (0x7809) - Factory OTP 1
+ */
+#define WM831X_DC3_TRIM_MASK 0xF000 /* DC3_TRIM - [15:12] */
+#define WM831X_DC3_TRIM_SHIFT 12 /* DC3_TRIM - [15:12] */
+#define WM831X_DC3_TRIM_WIDTH 4 /* DC3_TRIM - [15:12] */
+#define WM831X_DC2_TRIM_MASK 0x0FC0 /* DC2_TRIM - [11:6] */
+#define WM831X_DC2_TRIM_SHIFT 6 /* DC2_TRIM - [11:6] */
+#define WM831X_DC2_TRIM_WIDTH 6 /* DC2_TRIM - [11:6] */
+#define WM831X_DC1_TRIM_MASK 0x003F /* DC1_TRIM - [5:0] */
+#define WM831X_DC1_TRIM_SHIFT 0 /* DC1_TRIM - [5:0] */
+#define WM831X_DC1_TRIM_WIDTH 6 /* DC1_TRIM - [5:0] */
+
+/*
+ * R30730 (0x780A) - Factory OTP 2
+ */
+#define WM831X_CHIP_ID_MASK 0xFFFF /* CHIP_ID - [15:0] */
+#define WM831X_CHIP_ID_SHIFT 0 /* CHIP_ID - [15:0] */
+#define WM831X_CHIP_ID_WIDTH 16 /* CHIP_ID - [15:0] */
+
+/*
+ * R30731 (0x780B) - Factory OTP 3
+ */
+#define WM831X_OSC_TRIM_MASK 0x0780 /* OSC_TRIM - [10:7] */
+#define WM831X_OSC_TRIM_SHIFT 7 /* OSC_TRIM - [10:7] */
+#define WM831X_OSC_TRIM_WIDTH 4 /* OSC_TRIM - [10:7] */
+#define WM831X_BG_TRIM_MASK 0x0078 /* BG_TRIM - [6:3] */
+#define WM831X_BG_TRIM_SHIFT 3 /* BG_TRIM - [6:3] */
+#define WM831X_BG_TRIM_WIDTH 4 /* BG_TRIM - [6:3] */
+#define WM831X_LPBG_TRIM_MASK 0x0007 /* LPBG_TRIM - [2:0] */
+#define WM831X_LPBG_TRIM_SHIFT 0 /* LPBG_TRIM - [2:0] */
+#define WM831X_LPBG_TRIM_WIDTH 3 /* LPBG_TRIM - [2:0] */
+
+/*
+ * R30732 (0x780C) - Factory OTP 4
+ */
+#define WM831X_CHILD_I2C_ADDR_MASK 0x00FE /* CHILD_I2C_ADDR - [7:1] */
+#define WM831X_CHILD_I2C_ADDR_SHIFT 1 /* CHILD_I2C_ADDR - [7:1] */
+#define WM831X_CHILD_I2C_ADDR_WIDTH 7 /* CHILD_I2C_ADDR - [7:1] */
+#define WM831X_CH_AW 0x0001 /* CH_AW */
+#define WM831X_CH_AW_MASK 0x0001 /* CH_AW */
+#define WM831X_CH_AW_SHIFT 0 /* CH_AW */
+#define WM831X_CH_AW_WIDTH 1 /* CH_AW */
+
+/*
+ * R30733 (0x780D) - Factory OTP 5
+ */
+#define WM831X_CHARGE_TRIM_MASK 0x003F /* CHARGE_TRIM - [5:0] */
+#define WM831X_CHARGE_TRIM_SHIFT 0 /* CHARGE_TRIM - [5:0] */
+#define WM831X_CHARGE_TRIM_WIDTH 6 /* CHARGE_TRIM - [5:0] */
+
+/*
+ * R30736 (0x7810) - Customer OTP ID
+ */
+#define WM831X_OTP_AUTO_PROG 0x8000 /* OTP_AUTO_PROG */
+#define WM831X_OTP_AUTO_PROG_MASK 0x8000 /* OTP_AUTO_PROG */
+#define WM831X_OTP_AUTO_PROG_SHIFT 15 /* OTP_AUTO_PROG */
+#define WM831X_OTP_AUTO_PROG_WIDTH 1 /* OTP_AUTO_PROG */
+#define WM831X_OTP_CUST_ID_MASK 0x7FFE /* OTP_CUST_ID - [14:1] */
+#define WM831X_OTP_CUST_ID_SHIFT 1 /* OTP_CUST_ID - [14:1] */
+#define WM831X_OTP_CUST_ID_WIDTH 14 /* OTP_CUST_ID - [14:1] */
+#define WM831X_OTP_CUST_FINAL 0x0001 /* OTP_CUST_FINAL */
+#define WM831X_OTP_CUST_FINAL_MASK 0x0001 /* OTP_CUST_FINAL */
+#define WM831X_OTP_CUST_FINAL_SHIFT 0 /* OTP_CUST_FINAL */
+#define WM831X_OTP_CUST_FINAL_WIDTH 1 /* OTP_CUST_FINAL */
+
+/*
+ * R30759 (0x7827) - DBE CHECK DATA
+ */
+#define WM831X_DBE_VALID_DATA_MASK 0xFFFF /* DBE_VALID_DATA - [15:0] */
+#define WM831X_DBE_VALID_DATA_SHIFT 0 /* DBE_VALID_DATA - [15:0] */
+#define WM831X_DBE_VALID_DATA_WIDTH 16 /* DBE_VALID_DATA - [15:0] */
+
+
+#endif
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