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linux-next/drivers/mfd/da9052-core.c
Steve Twiss 547120edba mfd: da9053: Ensure the FAULT_LOG is cleared during MFD driver probe 
The function da9052_clear_fault_log() is added to mitigate the case of
persistent data being transferred between reboots.

Clearance of any the persistent information within the DA9053 FAULT_LOG
register must be completed during start-up so the fault-log does not
continue with previous values. A clearance function has been added here in
the kernel driver because wiping the fault-log cannot be counted on outside
the Linux kernel.

Signed-off-by: Steve Twiss <stwiss.opensource@diasemi.com>
Reviewed-by: Adam Thomson <adam.thomson.opensource@diasemi.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-10-04 15:48:02 +01:00

639 lines
16 KiB
C
Raw Blame History

/*
* Device access for Dialog DA9052 PMICs.
*
* Copyright(c) 2011 Dialog Semiconductor Ltd.
*
* Author: David Dajun Chen <dchen@diasemi.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/device.h>
#include <linux/delay.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/mfd/core.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/mfd/da9052/da9052.h>
#include <linux/mfd/da9052/pdata.h>
#include <linux/mfd/da9052/reg.h>
static bool da9052_reg_readable(struct device *dev, unsigned int reg)
{
switch (reg) {
case DA9052_PAGE0_CON_REG:
case DA9052_STATUS_A_REG:
case DA9052_STATUS_B_REG:
case DA9052_STATUS_C_REG:
case DA9052_STATUS_D_REG:
case DA9052_EVENT_A_REG:
case DA9052_EVENT_B_REG:
case DA9052_EVENT_C_REG:
case DA9052_EVENT_D_REG:
case DA9052_FAULTLOG_REG:
case DA9052_IRQ_MASK_A_REG:
case DA9052_IRQ_MASK_B_REG:
case DA9052_IRQ_MASK_C_REG:
case DA9052_IRQ_MASK_D_REG:
case DA9052_CONTROL_A_REG:
case DA9052_CONTROL_B_REG:
case DA9052_CONTROL_C_REG:
case DA9052_CONTROL_D_REG:
case DA9052_PDDIS_REG:
case DA9052_INTERFACE_REG:
case DA9052_RESET_REG:
case DA9052_GPIO_0_1_REG:
case DA9052_GPIO_2_3_REG:
case DA9052_GPIO_4_5_REG:
case DA9052_GPIO_6_7_REG:
case DA9052_GPIO_8_9_REG:
case DA9052_GPIO_10_11_REG:
case DA9052_GPIO_12_13_REG:
case DA9052_GPIO_14_15_REG:
case DA9052_ID_0_1_REG:
case DA9052_ID_2_3_REG:
case DA9052_ID_4_5_REG:
case DA9052_ID_6_7_REG:
case DA9052_ID_8_9_REG:
case DA9052_ID_10_11_REG:
case DA9052_ID_12_13_REG:
case DA9052_ID_14_15_REG:
case DA9052_ID_16_17_REG:
case DA9052_ID_18_19_REG:
case DA9052_ID_20_21_REG:
case DA9052_SEQ_STATUS_REG:
case DA9052_SEQ_A_REG:
case DA9052_SEQ_B_REG:
case DA9052_SEQ_TIMER_REG:
case DA9052_BUCKA_REG:
case DA9052_BUCKB_REG:
case DA9052_BUCKCORE_REG:
case DA9052_BUCKPRO_REG:
case DA9052_BUCKMEM_REG:
case DA9052_BUCKPERI_REG:
case DA9052_LDO1_REG:
case DA9052_LDO2_REG:
case DA9052_LDO3_REG:
case DA9052_LDO4_REG:
case DA9052_LDO5_REG:
case DA9052_LDO6_REG:
case DA9052_LDO7_REG:
case DA9052_LDO8_REG:
case DA9052_LDO9_REG:
case DA9052_LDO10_REG:
case DA9052_SUPPLY_REG:
case DA9052_PULLDOWN_REG:
case DA9052_CHGBUCK_REG:
case DA9052_WAITCONT_REG:
case DA9052_ISET_REG:
case DA9052_BATCHG_REG:
case DA9052_CHG_CONT_REG:
case DA9052_INPUT_CONT_REG:
case DA9052_CHG_TIME_REG:
case DA9052_BBAT_CONT_REG:
case DA9052_BOOST_REG:
case DA9052_LED_CONT_REG:
case DA9052_LEDMIN123_REG:
case DA9052_LED1_CONF_REG:
case DA9052_LED2_CONF_REG:
case DA9052_LED3_CONF_REG:
case DA9052_LED1CONT_REG:
case DA9052_LED2CONT_REG:
case DA9052_LED3CONT_REG:
case DA9052_LED_CONT_4_REG:
case DA9052_LED_CONT_5_REG:
case DA9052_ADC_MAN_REG:
case DA9052_ADC_CONT_REG:
case DA9052_ADC_RES_L_REG:
case DA9052_ADC_RES_H_REG:
case DA9052_VDD_RES_REG:
case DA9052_VDD_MON_REG:
case DA9052_ICHG_AV_REG:
case DA9052_ICHG_THD_REG:
case DA9052_ICHG_END_REG:
case DA9052_TBAT_RES_REG:
case DA9052_TBAT_HIGHP_REG:
case DA9052_TBAT_HIGHN_REG:
case DA9052_TBAT_LOW_REG:
case DA9052_T_OFFSET_REG:
case DA9052_ADCIN4_RES_REG:
case DA9052_AUTO4_HIGH_REG:
case DA9052_AUTO4_LOW_REG:
case DA9052_ADCIN5_RES_REG:
case DA9052_AUTO5_HIGH_REG:
case DA9052_AUTO5_LOW_REG:
case DA9052_ADCIN6_RES_REG:
case DA9052_AUTO6_HIGH_REG:
case DA9052_AUTO6_LOW_REG:
case DA9052_TJUNC_RES_REG:
case DA9052_TSI_CONT_A_REG:
case DA9052_TSI_CONT_B_REG:
case DA9052_TSI_X_MSB_REG:
case DA9052_TSI_Y_MSB_REG:
case DA9052_TSI_LSB_REG:
case DA9052_TSI_Z_MSB_REG:
case DA9052_COUNT_S_REG:
case DA9052_COUNT_MI_REG:
case DA9052_COUNT_H_REG:
case DA9052_COUNT_D_REG:
case DA9052_COUNT_MO_REG:
case DA9052_COUNT_Y_REG:
case DA9052_ALARM_MI_REG:
case DA9052_ALARM_H_REG:
case DA9052_ALARM_D_REG:
case DA9052_ALARM_MO_REG:
case DA9052_ALARM_Y_REG:
case DA9052_SECOND_A_REG:
case DA9052_SECOND_B_REG:
case DA9052_SECOND_C_REG:
case DA9052_SECOND_D_REG:
case DA9052_PAGE1_CON_REG:
return true;
default:
return false;
}
}
static bool da9052_reg_writeable(struct device *dev, unsigned int reg)
{
switch (reg) {
case DA9052_PAGE0_CON_REG:
case DA9052_EVENT_A_REG:
case DA9052_EVENT_B_REG:
case DA9052_EVENT_C_REG:
case DA9052_EVENT_D_REG:
case DA9052_FAULTLOG_REG:
case DA9052_IRQ_MASK_A_REG:
case DA9052_IRQ_MASK_B_REG:
case DA9052_IRQ_MASK_C_REG:
case DA9052_IRQ_MASK_D_REG:
case DA9052_CONTROL_A_REG:
case DA9052_CONTROL_B_REG:
case DA9052_CONTROL_C_REG:
case DA9052_CONTROL_D_REG:
case DA9052_PDDIS_REG:
case DA9052_RESET_REG:
case DA9052_GPIO_0_1_REG:
case DA9052_GPIO_2_3_REG:
case DA9052_GPIO_4_5_REG:
case DA9052_GPIO_6_7_REG:
case DA9052_GPIO_8_9_REG:
case DA9052_GPIO_10_11_REG:
case DA9052_GPIO_12_13_REG:
case DA9052_GPIO_14_15_REG:
case DA9052_ID_0_1_REG:
case DA9052_ID_2_3_REG:
case DA9052_ID_4_5_REG:
case DA9052_ID_6_7_REG:
case DA9052_ID_8_9_REG:
case DA9052_ID_10_11_REG:
case DA9052_ID_12_13_REG:
case DA9052_ID_14_15_REG:
case DA9052_ID_16_17_REG:
case DA9052_ID_18_19_REG:
case DA9052_ID_20_21_REG:
case DA9052_SEQ_STATUS_REG:
case DA9052_SEQ_A_REG:
case DA9052_SEQ_B_REG:
case DA9052_SEQ_TIMER_REG:
case DA9052_BUCKA_REG:
case DA9052_BUCKB_REG:
case DA9052_BUCKCORE_REG:
case DA9052_BUCKPRO_REG:
case DA9052_BUCKMEM_REG:
case DA9052_BUCKPERI_REG:
case DA9052_LDO1_REG:
case DA9052_LDO2_REG:
case DA9052_LDO3_REG:
case DA9052_LDO4_REG:
case DA9052_LDO5_REG:
case DA9052_LDO6_REG:
case DA9052_LDO7_REG:
case DA9052_LDO8_REG:
case DA9052_LDO9_REG:
case DA9052_LDO10_REG:
case DA9052_SUPPLY_REG:
case DA9052_PULLDOWN_REG:
case DA9052_CHGBUCK_REG:
case DA9052_WAITCONT_REG:
case DA9052_ISET_REG:
case DA9052_BATCHG_REG:
case DA9052_CHG_CONT_REG:
case DA9052_INPUT_CONT_REG:
case DA9052_BBAT_CONT_REG:
case DA9052_BOOST_REG:
case DA9052_LED_CONT_REG:
case DA9052_LEDMIN123_REG:
case DA9052_LED1_CONF_REG:
case DA9052_LED2_CONF_REG:
case DA9052_LED3_CONF_REG:
case DA9052_LED1CONT_REG:
case DA9052_LED2CONT_REG:
case DA9052_LED3CONT_REG:
case DA9052_LED_CONT_4_REG:
case DA9052_LED_CONT_5_REG:
case DA9052_ADC_MAN_REG:
case DA9052_ADC_CONT_REG:
case DA9052_ADC_RES_L_REG:
case DA9052_ADC_RES_H_REG:
case DA9052_VDD_RES_REG:
case DA9052_VDD_MON_REG:
case DA9052_ICHG_THD_REG:
case DA9052_ICHG_END_REG:
case DA9052_TBAT_HIGHP_REG:
case DA9052_TBAT_HIGHN_REG:
case DA9052_TBAT_LOW_REG:
case DA9052_T_OFFSET_REG:
case DA9052_AUTO4_HIGH_REG:
case DA9052_AUTO4_LOW_REG:
case DA9052_AUTO5_HIGH_REG:
case DA9052_AUTO5_LOW_REG:
case DA9052_AUTO6_HIGH_REG:
case DA9052_AUTO6_LOW_REG:
case DA9052_TSI_CONT_A_REG:
case DA9052_TSI_CONT_B_REG:
case DA9052_COUNT_S_REG:
case DA9052_COUNT_MI_REG:
case DA9052_COUNT_H_REG:
case DA9052_COUNT_D_REG:
case DA9052_COUNT_MO_REG:
case DA9052_COUNT_Y_REG:
case DA9052_ALARM_MI_REG:
case DA9052_ALARM_H_REG:
case DA9052_ALARM_D_REG:
case DA9052_ALARM_MO_REG:
case DA9052_ALARM_Y_REG:
case DA9052_PAGE1_CON_REG:
return true;
default:
return false;
}
}
static bool da9052_reg_volatile(struct device *dev, unsigned int reg)
{
switch (reg) {
case DA9052_STATUS_A_REG:
case DA9052_STATUS_B_REG:
case DA9052_STATUS_C_REG:
case DA9052_STATUS_D_REG:
case DA9052_EVENT_A_REG:
case DA9052_EVENT_B_REG:
case DA9052_EVENT_C_REG:
case DA9052_EVENT_D_REG:
case DA9052_CONTROL_B_REG:
case DA9052_CONTROL_D_REG:
case DA9052_SUPPLY_REG:
case DA9052_FAULTLOG_REG:
case DA9052_CHG_TIME_REG:
case DA9052_ADC_RES_L_REG:
case DA9052_ADC_RES_H_REG:
case DA9052_VDD_RES_REG:
case DA9052_ICHG_AV_REG:
case DA9052_TBAT_RES_REG:
case DA9052_ADCIN4_RES_REG:
case DA9052_ADCIN5_RES_REG:
case DA9052_ADCIN6_RES_REG:
case DA9052_TJUNC_RES_REG:
case DA9052_TSI_X_MSB_REG:
case DA9052_TSI_Y_MSB_REG:
case DA9052_TSI_LSB_REG:
case DA9052_TSI_Z_MSB_REG:
case DA9052_COUNT_S_REG:
case DA9052_COUNT_MI_REG:
case DA9052_COUNT_H_REG:
case DA9052_COUNT_D_REG:
case DA9052_COUNT_MO_REG:
case DA9052_COUNT_Y_REG:
case DA9052_ALARM_MI_REG:
return true;
default:
return false;
}
}
/*
* TBAT look-up table is computed from the R90 reg (8 bit register)
* reading as below. The battery temperature is in milliCentigrade
* TBAT = (1/(t1+1/298) - 273) * 1000 mC
* where t1 = (1/B)* ln(( ADCval * 2.5)/(R25*ITBAT*255))
* Default values are R25 = 10e3, B = 3380, ITBAT = 50e-6
* Example:
* R25=10E3, B=3380, ITBAT=50e-6, ADCVAL=62d calculates
* TBAT = 20015 mili degrees Centrigrade
*
*/
static const int32_t tbat_lookup[255] = {
183258, 144221, 124334, 111336, 101826, 94397, 88343, 83257,
78889, 75071, 71688, 68656, 65914, 63414, 61120, 59001,
570366, 55204, 53490, 51881, 50364, 48931, 47574, 46285,
45059, 43889, 42772, 41703, 40678, 39694, 38748, 37838,
36961, 36115, 35297, 34507, 33743, 33002, 32284, 31588,
30911, 30254, 29615, 28994, 28389, 27799, 27225, 26664,
26117, 25584, 25062, 24553, 24054, 23567, 23091, 22624,
22167, 21719, 21281, 20851, 20429, 20015, 19610, 19211,
18820, 18436, 18058, 17688, 17323, 16965, 16612, 16266,
15925, 15589, 15259, 14933, 14613, 14298, 13987, 13681,
13379, 13082, 12788, 12499, 12214, 11933, 11655, 11382,
11112, 10845, 10582, 10322, 10066, 9812, 9562, 9315,
9071, 8830, 8591, 8356, 8123, 7893, 7665, 7440,
7218, 6998, 6780, 6565, 6352, 6141, 5933, 5726,
5522, 5320, 5120, 4922, 4726, 4532, 4340, 4149,
3961, 3774, 3589, 3406, 3225, 3045, 2867, 2690,
2516, 2342, 2170, 2000, 1831, 1664, 1498, 1334,
1171, 1009, 849, 690, 532, 376, 221, 67,
-84, -236, -386, -535, -683, -830, -975, -1119,
-1263, -1405, -1546, -1686, -1825, -1964, -2101, -2237,
-2372, -2506, -2639, -2771, -2902, -3033, -3162, -3291,
-3418, -3545, -3671, -3796, -3920, -4044, -4166, -4288,
-4409, -4529, -4649, -4767, -4885, -5002, -5119, -5235,
-5349, -5464, -5577, -5690, -5802, -5913, -6024, -6134,
-6244, -6352, -6461, -6568, -6675, -6781, -6887, -6992,
-7096, -7200, -7303, -7406, -7508, -7609, -7710, -7810,
-7910, -8009, -8108, -8206, -8304, -8401, -8497, -8593,
-8689, -8784, -8878, -8972, -9066, -9159, -9251, -9343,
-9435, -9526, -9617, -9707, -9796, -9886, -9975, -10063,
-10151, -10238, -10325, -10412, -10839, -10923, -11007, -11090,
-11173, -11256, -11338, -11420, -11501, -11583, -11663, -11744,
-11823, -11903, -11982
};
static const u8 chan_mux[DA9052_ADC_VBBAT + 1] = {
[DA9052_ADC_VDDOUT] = DA9052_ADC_MAN_MUXSEL_VDDOUT,
[DA9052_ADC_ICH] = DA9052_ADC_MAN_MUXSEL_ICH,
[DA9052_ADC_TBAT] = DA9052_ADC_MAN_MUXSEL_TBAT,
[DA9052_ADC_VBAT] = DA9052_ADC_MAN_MUXSEL_VBAT,
[DA9052_ADC_IN4] = DA9052_ADC_MAN_MUXSEL_AD4,
[DA9052_ADC_IN5] = DA9052_ADC_MAN_MUXSEL_AD5,
[DA9052_ADC_IN6] = DA9052_ADC_MAN_MUXSEL_AD6,
[DA9052_ADC_VBBAT] = DA9052_ADC_MAN_MUXSEL_VBBAT
};
int da9052_adc_manual_read(struct da9052 *da9052, unsigned char channel)
{
int ret;
unsigned short calc_data;
unsigned short data;
unsigned char mux_sel;
if (channel > DA9052_ADC_VBBAT)
return -EINVAL;
mutex_lock(&da9052->auxadc_lock);
/* Channel gets activated on enabling the Conversion bit */
mux_sel = chan_mux[channel] | DA9052_ADC_MAN_MAN_CONV;
ret = da9052_reg_write(da9052, DA9052_ADC_MAN_REG, mux_sel);
if (ret < 0)
goto err;
/* Wait for an interrupt */
if (!wait_for_completion_timeout(&da9052->done,
msecs_to_jiffies(500))) {
dev_err(da9052->dev,
"timeout waiting for ADC conversion interrupt\n");
ret = -ETIMEDOUT;
goto err;
}
ret = da9052_reg_read(da9052, DA9052_ADC_RES_H_REG);
if (ret < 0)
goto err;
calc_data = (unsigned short)ret;
data = calc_data << 2;
ret = da9052_reg_read(da9052, DA9052_ADC_RES_L_REG);
if (ret < 0)
goto err;
calc_data = (unsigned short)(ret & DA9052_ADC_RES_LSB);
data |= calc_data;
ret = data;
err:
mutex_unlock(&da9052->auxadc_lock);
return ret;
}
EXPORT_SYMBOL_GPL(da9052_adc_manual_read);
int da9052_adc_read_temp(struct da9052 *da9052)
{
int tbat;
tbat = da9052_reg_read(da9052, DA9052_TBAT_RES_REG);
if (tbat <= 0)
return tbat;
/* ARRAY_SIZE check is not needed since TBAT is a 8-bit register */
return tbat_lookup[tbat - 1];
}
EXPORT_SYMBOL_GPL(da9052_adc_read_temp);
static const struct mfd_cell da9052_subdev_info[] = {
{
.name = "da9052-regulator",
.id = 0,
},
{
.name = "da9052-regulator",
.id = 1,
},
{
.name = "da9052-regulator",
.id = 2,
},
{
.name = "da9052-regulator",
.id = 3,
},
{
.name = "da9052-regulator",
.id = 4,
},
{
.name = "da9052-regulator",
.id = 5,
},
{
.name = "da9052-regulator",
.id = 6,
},
{
.name = "da9052-regulator",
.id = 7,
},
{
.name = "da9052-regulator",
.id = 8,
},
{
.name = "da9052-regulator",
.id = 9,
},
{
.name = "da9052-regulator",
.id = 10,
},
{
.name = "da9052-regulator",
.id = 11,
},
{
.name = "da9052-regulator",
.id = 12,
},
{
.name = "da9052-regulator",
.id = 13,
},
{
.name = "da9052-onkey",
},
{
.name = "da9052-rtc",
},
{
.name = "da9052-gpio",
},
{
.name = "da9052-hwmon",
},
{
.name = "da9052-leds",
},
{
.name = "da9052-wled1",
},
{
.name = "da9052-wled2",
},
{
.name = "da9052-wled3",
},
{
.name = "da9052-tsi",
},
{
.name = "da9052-bat",
},
{
.name = "da9052-watchdog",
},
};
const struct regmap_config da9052_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.cache_type = REGCACHE_RBTREE,
.max_register = DA9052_PAGE1_CON_REG,
.readable_reg = da9052_reg_readable,
.writeable_reg = da9052_reg_writeable,
.volatile_reg = da9052_reg_volatile,
};
EXPORT_SYMBOL_GPL(da9052_regmap_config);
static int da9052_clear_fault_log(struct da9052 *da9052)
{
int ret = 0;
int fault_log = 0;
fault_log = da9052_reg_read(da9052, DA9052_FAULTLOG_REG);
if (fault_log < 0) {
dev_err(da9052->dev,
"Cannot read FAULT_LOG %d\n", fault_log);
return fault_log;
}
if (fault_log) {
if (fault_log & DA9052_FAULTLOG_TWDERROR)
dev_dbg(da9052->dev,
"Fault log entry detected: TWD_ERROR\n");
if (fault_log & DA9052_FAULTLOG_VDDFAULT)
dev_dbg(da9052->dev,
"Fault log entry detected: VDD_FAULT\n");
if (fault_log & DA9052_FAULTLOG_VDDSTART)
dev_dbg(da9052->dev,
"Fault log entry detected: VDD_START\n");
if (fault_log & DA9052_FAULTLOG_TEMPOVER)
dev_dbg(da9052->dev,
"Fault log entry detected: TEMP_OVER\n");
if (fault_log & DA9052_FAULTLOG_KEYSHUT)
dev_dbg(da9052->dev,
"Fault log entry detected: KEY_SHUT\n");
if (fault_log & DA9052_FAULTLOG_NSDSET)
dev_dbg(da9052->dev,
"Fault log entry detected: nSD_SHUT\n");
if (fault_log & DA9052_FAULTLOG_WAITSET)
dev_dbg(da9052->dev,
"Fault log entry detected: WAIT_SHUT\n");
ret = da9052_reg_write(da9052,
DA9052_FAULTLOG_REG,
0xFF);
if (ret < 0)
dev_err(da9052->dev,
"Cannot reset FAULT_LOG values %d\n", ret);
}
return ret;
}
int da9052_device_init(struct da9052 *da9052, u8 chip_id)
{
struct da9052_pdata *pdata = dev_get_platdata(da9052->dev);
int ret;
mutex_init(&da9052->auxadc_lock);
init_completion(&da9052->done);
ret = da9052_clear_fault_log(da9052);
if (ret < 0)
dev_warn(da9052->dev, "Cannot clear FAULT_LOG\n");
if (pdata && pdata->init != NULL)
pdata->init(da9052);
da9052->chip_id = chip_id;
ret = da9052_irq_init(da9052);
if (ret != 0) {
dev_err(da9052->dev, "da9052_irq_init failed: %d\n", ret);
return ret;
}
ret = mfd_add_devices(da9052->dev, PLATFORM_DEVID_AUTO,
da9052_subdev_info,
ARRAY_SIZE(da9052_subdev_info), NULL, 0, NULL);
if (ret) {
dev_err(da9052->dev, "mfd_add_devices failed: %d\n", ret);
goto err;
}
return 0;
err:
da9052_irq_exit(da9052);
return ret;
}
void da9052_device_exit(struct da9052 *da9052)
{
mfd_remove_devices(da9052->dev);
da9052_irq_exit(da9052);
}
MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
MODULE_DESCRIPTION("DA9052 MFD Core");
MODULE_LICENSE("GPL");
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