diff options
| -rw-r--r-- | drivers/mfd/wm831x-core.c | 101 | ||||
| -rw-r--r-- | include/linux/mfd/wm831x/auxadc.h | 216 | ||||
| -rw-r--r-- | include/linux/mfd/wm831x/core.h | 2 |
3 files changed, 319 insertions, 0 deletions
diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c index eb63d22160d..42bef1dd2ca 100644 --- a/drivers/mfd/wm831x-core.c +++ b/drivers/mfd/wm831x-core.c @@ -15,11 +15,14 @@ #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/pdata.h> #include <linux/mfd/wm831x/irq.h> +#include <linux/mfd/wm831x/auxadc.h> enum wm831x_parent { WM8310 = 0, @@ -244,6 +247,103 @@ out: } EXPORT_SYMBOL_GPL(wm831x_set_bits); +/** + * wm831x_auxadc_read: Read a value from the WM831x AUXADC + * + * @wm831x: Device to read from. + * @input: AUXADC input to read. + */ +int wm831x_auxadc_read(struct wm831x *wm831x, enum wm831x_auxadc input) +{ + int tries = 10; + int ret, src; + + mutex_lock(&wm831x->auxadc_lock); + + ret = wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL, + WM831X_AUX_ENA, WM831X_AUX_ENA); + if (ret < 0) { + dev_err(wm831x->dev, "Failed to enable AUXADC: %d\n", ret); + goto out; + } + + /* We force a single source at present */ + src = input; + ret = wm831x_reg_write(wm831x, WM831X_AUXADC_SOURCE, + 1 << src); + if (ret < 0) { + dev_err(wm831x->dev, "Failed to set AUXADC source: %d\n", ret); + goto out; + } + + ret = wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL, + WM831X_AUX_CVT_ENA, WM831X_AUX_CVT_ENA); + if (ret < 0) { + dev_err(wm831x->dev, "Failed to start AUXADC: %d\n", ret); + goto disable; + } + + do { + msleep(1); + + ret = wm831x_reg_read(wm831x, WM831X_AUXADC_CONTROL); + if (ret < 0) + ret = WM831X_AUX_CVT_ENA; + } while ((ret & WM831X_AUX_CVT_ENA) && --tries); + + if (ret & WM831X_AUX_CVT_ENA) { + dev_err(wm831x->dev, "Timed out reading AUXADC\n"); + ret = -EBUSY; + goto disable; + } + + ret = wm831x_reg_read(wm831x, WM831X_AUXADC_DATA); + if (ret < 0) { + dev_err(wm831x->dev, "Failed to read AUXADC data: %d\n", ret); + } else { + src = ((ret & WM831X_AUX_DATA_SRC_MASK) + >> WM831X_AUX_DATA_SRC_SHIFT) - 1; + + if (src == 14) + src = WM831X_AUX_CAL; + + if (src != input) { + dev_err(wm831x->dev, "Data from source %d not %d\n", + src, input); + ret = -EINVAL; + } else { + ret &= WM831X_AUX_DATA_MASK; + } + } + +disable: + wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL, WM831X_AUX_ENA, 0); +out: + mutex_unlock(&wm831x->auxadc_lock); + return ret; +} +EXPORT_SYMBOL_GPL(wm831x_auxadc_read); + +/** + * wm831x_auxadc_read_uv: Read a voltage from the WM831x AUXADC + * + * @wm831x: Device to read from. + * @input: AUXADC input to read. + */ +int wm831x_auxadc_read_uv(struct wm831x *wm831x, enum wm831x_auxadc input) +{ + int ret; + + ret = wm831x_auxadc_read(wm831x, input); + if (ret < 0) + return ret; + + ret *= 1465; + + return ret; +} +EXPORT_SYMBOL_GPL(wm831x_auxadc_read_uv); + static struct resource wm831x_dcdc1_resources[] = { { .start = WM831X_DC1_CONTROL_1, @@ -1084,6 +1184,7 @@ static int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq) mutex_init(&wm831x->io_lock); mutex_init(&wm831x->key_lock); + mutex_init(&wm831x->auxadc_lock); dev_set_drvdata(wm831x->dev, wm831x); ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID); diff --git a/include/linux/mfd/wm831x/auxadc.h b/include/linux/mfd/wm831x/auxadc.h new file mode 100644 index 00000000000..b132067e9e9 --- /dev/null +++ b/include/linux/mfd/wm831x/auxadc.h @@ -0,0 +1,216 @@ +/* + * include/linux/mfd/wm831x/auxadc.h -- Auxiliary ADC 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_AUXADC_H__ +#define __MFD_WM831X_AUXADC_H__ + +/* + * R16429 (0x402D) - AuxADC Data + */ +#define WM831X_AUX_DATA_SRC_MASK 0xF000 /* AUX_DATA_SRC - [15:12] */ +#define WM831X_AUX_DATA_SRC_SHIFT 12 /* AUX_DATA_SRC - [15:12] */ +#define WM831X_AUX_DATA_SRC_WIDTH 4 /* AUX_DATA_SRC - [15:12] */ +#define WM831X_AUX_DATA_MASK 0x0FFF /* AUX_DATA - [11:0] */ +#define WM831X_AUX_DATA_SHIFT 0 /* AUX_DATA - [11:0] */ +#define WM831X_AUX_DATA_WIDTH 12 /* AUX_DATA - [11:0] */ + +/* + * R16430 (0x402E) - AuxADC Control + */ +#define WM831X_AUX_ENA 0x8000 /* AUX_ENA */ +#define WM831X_AUX_ENA_MASK 0x8000 /* AUX_ENA */ +#define WM831X_AUX_ENA_SHIFT 15 /* AUX_ENA */ +#define WM831X_AUX_ENA_WIDTH 1 /* AUX_ENA */ +#define WM831X_AUX_CVT_ENA 0x4000 /* AUX_CVT_ENA */ +#define WM831X_AUX_CVT_ENA_MASK 0x4000 /* AUX_CVT_ENA */ +#define WM831X_AUX_CVT_ENA_SHIFT 14 /* AUX_CVT_ENA */ +#define WM831X_AUX_CVT_ENA_WIDTH 1 /* AUX_CVT_ENA */ +#define WM831X_AUX_SLPENA 0x1000 /* AUX_SLPENA */ +#define WM831X_AUX_SLPENA_MASK 0x1000 /* AUX_SLPENA */ +#define WM831X_AUX_SLPENA_SHIFT 12 /* AUX_SLPENA */ +#define WM831X_AUX_SLPENA_WIDTH 1 /* AUX_SLPENA */ +#define WM831X_AUX_FRC_ENA 0x0800 /* AUX_FRC_ENA */ +#define WM831X_AUX_FRC_ENA_MASK 0x0800 /* AUX_FRC_ENA */ +#define WM831X_AUX_FRC_ENA_SHIFT 11 /* AUX_FRC_ENA */ +#define WM831X_AUX_FRC_ENA_WIDTH 1 /* AUX_FRC_ENA */ +#define WM831X_AUX_RATE_MASK 0x003F /* AUX_RATE - [5:0] */ +#define WM831X_AUX_RATE_SHIFT 0 /* AUX_RATE - [5:0] */ +#define WM831X_AUX_RATE_WIDTH 6 /* AUX_RATE - [5:0] */ + +/* + * R16431 (0x402F) - AuxADC Source + */ +#define WM831X_AUX_CAL_SEL 0x8000 /* AUX_CAL_SEL */ +#define WM831X_AUX_CAL_SEL_MASK 0x8000 /* AUX_CAL_SEL */ +#define WM831X_AUX_CAL_SEL_SHIFT 15 /* AUX_CAL_SEL */ +#define WM831X_AUX_CAL_SEL_WIDTH 1 /* AUX_CAL_SEL */ +#define WM831X_AUX_BKUP_BATT_SEL 0x0400 /* AUX_BKUP_BATT_SEL */ +#define WM831X_AUX_BKUP_BATT_SEL_MASK 0x0400 /* AUX_BKUP_BATT_SEL */ +#define WM831X_AUX_BKUP_BATT_SEL_SHIFT 10 /* AUX_BKUP_BATT_SEL */ +#define WM831X_AUX_BKUP_BATT_SEL_WIDTH 1 /* AUX_BKUP_BATT_SEL */ +#define WM831X_AUX_WALL_SEL 0x0200 /* AUX_WALL_SEL */ +#define WM831X_AUX_WALL_SEL_MASK 0x0200 /* AUX_WALL_SEL */ +#define WM831X_AUX_WALL_SEL_SHIFT 9 /* AUX_WALL_SEL */ +#define WM831X_AUX_WALL_SEL_WIDTH 1 /* AUX_WALL_SEL */ +#define WM831X_AUX_BATT_SEL 0x0100 /* AUX_BATT_SEL */ +#define WM831X_AUX_BATT_SEL_MASK 0x0100 /* AUX_BATT_SEL */ +#define WM831X_AUX_BATT_SEL_SHIFT 8 /* AUX_BATT_SEL */ +#define WM831X_AUX_BATT_SEL_WIDTH 1 /* AUX_BATT_SEL */ +#define WM831X_AUX_USB_SEL 0x0080 /* AUX_USB_SEL */ +#define WM831X_AUX_USB_SEL_MASK 0x0080 /* AUX_USB_SEL */ +#define WM831X_AUX_USB_SEL_SHIFT 7 /* AUX_USB_SEL */ +#define WM831X_AUX_USB_SEL_WIDTH 1 /* AUX_USB_SEL */ +#define WM831X_AUX_SYSVDD_SEL 0x0040 /* AUX_SYSVDD_SEL */ +#define WM831X_AUX_SYSVDD_SEL_MASK 0x0040 /* AUX_SYSVDD_SEL */ +#define WM831X_AUX_SYSVDD_SEL_SHIFT 6 /* AUX_SYSVDD_SEL */ +#define WM831X_AUX_SYSVDD_SEL_WIDTH 1 /* AUX_SYSVDD_SEL */ +#define WM831X_AUX_BATT_TEMP_SEL 0x0020 /* AUX_BATT_TEMP_SEL */ +#define WM831X_AUX_BATT_TEMP_SEL_MASK 0x0020 /* AUX_BATT_TEMP_SEL */ +#define WM831X_AUX_BATT_TEMP_SEL_SHIFT 5 /* AUX_BATT_TEMP_SEL */ +#define WM831X_AUX_BATT_TEMP_SEL_WIDTH 1 /* AUX_BATT_TEMP_SEL */ +#define WM831X_AUX_CHIP_TEMP_SEL 0x0010 /* AUX_CHIP_TEMP_SEL */ +#define WM831X_AUX_CHIP_TEMP_SEL_MASK 0x0010 /* AUX_CHIP_TEMP_SEL */ +#define WM831X_AUX_CHIP_TEMP_SEL_SHIFT 4 /* AUX_CHIP_TEMP_SEL */ +#define WM831X_AUX_CHIP_TEMP_SEL_WIDTH 1 /* AUX_CHIP_TEMP_SEL */ +#define WM831X_AUX_AUX4_SEL 0x0008 /* AUX_AUX4_SEL */ +#define WM831X_AUX_AUX4_SEL_MASK 0x0008 /* AUX_AUX4_SEL */ +#define WM831X_AUX_AUX4_SEL_SHIFT 3 /* AUX_AUX4_SEL */ +#define WM831X_AUX_AUX4_SEL_WIDTH 1 /* AUX_AUX4_SEL */ +#define WM831X_AUX_AUX3_SEL 0x0004 /* AUX_AUX3_SEL */ +#define WM831X_AUX_AUX3_SEL_MASK 0x0004 /* AUX_AUX3_SEL */ +#define WM831X_AUX_AUX3_SEL_SHIFT 2 /* AUX_AUX3_SEL */ +#define WM831X_AUX_AUX3_SEL_WIDTH 1 /* AUX_AUX3_SEL */ +#define WM831X_AUX_AUX2_SEL 0x0002 /* AUX_AUX2_SEL */ +#define WM831X_AUX_AUX2_SEL_MASK 0x0002 /* AUX_AUX2_SEL */ +#define WM831X_AUX_AUX2_SEL_SHIFT 1 /* AUX_AUX2_SEL */ +#define WM831X_AUX_AUX2_SEL_WIDTH 1 /* AUX_AUX2_SEL */ +#define WM831X_AUX_AUX1_SEL 0x0001 /* AUX_AUX1_SEL */ +#define WM831X_AUX_AUX1_SEL_MASK 0x0001 /* AUX_AUX1_SEL */ +#define WM831X_AUX_AUX1_SEL_SHIFT 0 /* AUX_AUX1_SEL */ +#define WM831X_AUX_AUX1_SEL_WIDTH 1 /* AUX_AUX1_SEL */ + +/* + * R16432 (0x4030) - Comparator Control + */ +#define WM831X_DCOMP4_STS 0x0800 /* DCOMP4_STS */ +#define WM831X_DCOMP4_STS_MASK 0x0800 /* DCOMP4_STS */ +#define WM831X_DCOMP4_STS_SHIFT 11 /* DCOMP4_STS */ +#define WM831X_DCOMP4_STS_WIDTH 1 /* DCOMP4_STS */ +#define WM831X_DCOMP3_STS 0x0400 /* DCOMP3_STS */ +#define WM831X_DCOMP3_STS_MASK 0x0400 /* DCOMP3_STS */ +#define WM831X_DCOMP3_STS_SHIFT 10 /* DCOMP3_STS */ +#define WM831X_DCOMP3_STS_WIDTH 1 /* DCOMP3_STS */ +#define WM831X_DCOMP2_STS 0x0200 /* DCOMP2_STS */ +#define WM831X_DCOMP2_STS_MASK 0x0200 /* DCOMP2_STS */ +#define WM831X_DCOMP2_STS_SHIFT 9 /* DCOMP2_STS */ +#define WM831X_DCOMP2_STS_WIDTH 1 /* DCOMP2_STS */ +#define WM831X_DCOMP1_STS 0x0100 /* DCOMP1_STS */ +#define WM831X_DCOMP1_STS_MASK 0x0100 /* DCOMP1_STS */ +#define WM831X_DCOMP1_STS_SHIFT 8 /* DCOMP1_STS */ +#define WM831X_DCOMP1_STS_WIDTH 1 /* DCOMP1_STS */ +#define WM831X_DCMP4_ENA 0x0008 /* DCMP4_ENA */ +#define WM831X_DCMP4_ENA_MASK 0x0008 /* DCMP4_ENA */ +#define WM831X_DCMP4_ENA_SHIFT 3 /* DCMP4_ENA */ +#define WM831X_DCMP4_ENA_WIDTH 1 /* DCMP4_ENA */ +#define WM831X_DCMP3_ENA 0x0004 /* DCMP3_ENA */ +#define WM831X_DCMP3_ENA_MASK 0x0004 /* DCMP3_ENA */ +#define WM831X_DCMP3_ENA_SHIFT 2 /* DCMP3_ENA */ +#define WM831X_DCMP3_ENA_WIDTH 1 /* DCMP3_ENA */ +#define WM831X_DCMP2_ENA 0x0002 /* DCMP2_ENA */ +#define WM831X_DCMP2_ENA_MASK 0x0002 /* DCMP2_ENA */ +#define WM831X_DCMP2_ENA_SHIFT 1 /* DCMP2_ENA */ +#define WM831X_DCMP2_ENA_WIDTH 1 /* DCMP2_ENA */ +#define WM831X_DCMP1_ENA 0x0001 /* DCMP1_ENA */ +#define WM831X_DCMP1_ENA_MASK 0x0001 /* DCMP1_ENA */ +#define WM831X_DCMP1_ENA_SHIFT 0 /* DCMP1_ENA */ +#define WM831X_DCMP1_ENA_WIDTH 1 /* DCMP1_ENA */ + +/* + * R16433 (0x4031) - Comparator 1 + */ +#define WM831X_DCMP1_SRC_MASK 0xE000 /* DCMP1_SRC - [15:13] */ +#define WM831X_DCMP1_SRC_SHIFT 13 /* DCMP1_SRC - [15:13] */ +#define WM831X_DCMP1_SRC_WIDTH 3 /* DCMP1_SRC - [15:13] */ +#define WM831X_DCMP1_GT 0x1000 /* DCMP1_GT */ +#define WM831X_DCMP1_GT_MASK 0x1000 /* DCMP1_GT */ +#define WM831X_DCMP1_GT_SHIFT 12 /* DCMP1_GT */ +#define WM831X_DCMP1_GT_WIDTH 1 /* DCMP1_GT */ +#define WM831X_DCMP1_THR_MASK 0x0FFF /* DCMP1_THR - [11:0] */ +#define WM831X_DCMP1_THR_SHIFT 0 /* DCMP1_THR - [11:0] */ +#define WM831X_DCMP1_THR_WIDTH 12 /* DCMP1_THR - [11:0] */ + +/* + * R16434 (0x4032) - Comparator 2 + */ +#define WM831X_DCMP2_SRC_MASK 0xE000 /* DCMP2_SRC - [15:13] */ +#define WM831X_DCMP2_SRC_SHIFT 13 /* DCMP2_SRC - [15:13] */ +#define WM831X_DCMP2_SRC_WIDTH 3 /* DCMP2_SRC - [15:13] */ +#define WM831X_DCMP2_GT 0x1000 /* DCMP2_GT */ +#define WM831X_DCMP2_GT_MASK 0x1000 /* DCMP2_GT */ +#define WM831X_DCMP2_GT_SHIFT 12 /* DCMP2_GT */ +#define WM831X_DCMP2_GT_WIDTH 1 /* DCMP2_GT */ +#define WM831X_DCMP2_THR_MASK 0x0FFF /* DCMP2_THR - [11:0] */ +#define WM831X_DCMP2_THR_SHIFT 0 /* DCMP2_THR - [11:0] */ +#define WM831X_DCMP2_THR_WIDTH 12 /* DCMP2_THR - [11:0] */ + +/* + * R16435 (0x4033) - Comparator 3 + */ +#define WM831X_DCMP3_SRC_MASK 0xE000 /* DCMP3_SRC - [15:13] */ +#define WM831X_DCMP3_SRC_SHIFT 13 /* DCMP3_SRC - [15:13] */ +#define WM831X_DCMP3_SRC_WIDTH 3 /* DCMP3_SRC - [15:13] */ +#define WM831X_DCMP3_GT 0x1000 /* DCMP3_GT */ +#define WM831X_DCMP3_GT_MASK 0x1000 /* DCMP3_GT */ +#define WM831X_DCMP3_GT_SHIFT 12 /* DCMP3_GT */ +#define WM831X_DCMP3_GT_WIDTH 1 /* DCMP3_GT */ +#define WM831X_DCMP3_THR_MASK 0x0FFF /* DCMP3_THR - [11:0] */ +#define WM831X_DCMP3_THR_SHIFT 0 /* DCMP3_THR - [11:0] */ +#define WM831X_DCMP3_THR_WIDTH 12 /* DCMP3_THR - [11:0] */ + +/* + * R16436 (0x4034) - Comparator 4 + */ +#define WM831X_DCMP4_SRC_MASK 0xE000 /* DCMP4_SRC - [15:13] */ +#define WM831X_DCMP4_SRC_SHIFT 13 /* DCMP4_SRC - [15:13] */ +#define WM831X_DCMP4_SRC_WIDTH 3 /* DCMP4_SRC - [15:13] */ +#define WM831X_DCMP4_GT 0x1000 /* DCMP4_GT */ +#define WM831X_DCMP4_GT_MASK 0x1000 /* DCMP4_GT */ +#define WM831X_DCMP4_GT_SHIFT 12 /* DCMP4_GT */ +#define WM831X_DCMP4_GT_WIDTH 1 /* DCMP4_GT */ +#define WM831X_DCMP4_THR_MASK 0x0FFF /* DCMP4_THR - [11:0] */ +#define WM831X_DCMP4_THR_SHIFT 0 /* DCMP4_THR - [11:0] */ +#define WM831X_DCMP4_THR_WIDTH 12 /* DCMP4_THR - [11:0] */ + +#define WM831X_AUX_CAL_FACTOR 0xfff +#define WM831X_AUX_CAL_NOMINAL 0x222 + +enum wm831x_auxadc { + WM831X_AUX_CAL = 15, + WM831X_AUX_BKUP_BATT = 10, + WM831X_AUX_WALL = 9, + WM831X_AUX_BATT = 8, + WM831X_AUX_USB = 7, + WM831X_AUX_SYSVDD = 6, + WM831X_AUX_BATT_TEMP = 5, + WM831X_AUX_CHIP_TEMP = 4, + WM831X_AUX_AUX4 = 3, + WM831X_AUX_AUX3 = 2, + WM831X_AUX_AUX2 = 1, + WM831X_AUX_AUX1 = 0, +}; + +int wm831x_auxadc_read(struct wm831x *wm831x, enum wm831x_auxadc input); +int wm831x_auxadc_read_uv(struct wm831x *wm831x, enum wm831x_auxadc input); + +#endif diff --git a/include/linux/mfd/wm831x/core.h b/include/linux/mfd/wm831x/core.h index b96c9355b16..d7134dfba56 100644 --- a/include/linux/mfd/wm831x/core.h +++ b/include/linux/mfd/wm831x/core.h @@ -234,6 +234,8 @@ struct wm831x { unsigned int irq_base; int irq_masks[5]; + struct mutex auxadc_lock; + /* The WM831x has a security key blocking access to certain * registers. The mutex is taken by the accessors for locking * and unlocking the security key, locked is used to fail |