diff options
| -rw-r--r-- | drivers/mfd/wm831x-core.c | 4 | ||||
| -rw-r--r-- | drivers/mfd/wm831x-otp.c | 83 | ||||
| -rw-r--r-- | include/linux/mfd/wm831x/otp.h | 162 |
3 files changed, 249 insertions, 0 deletions
diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c index bc40ea315cc0..33eaea2f988e 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 000000000000..f742745ff354 --- /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 000000000000..ce1f81a39bfc --- /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 |