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linux_dsm_epyc7002/drivers/mfd/tps65910.c
Kim, Milo 0582c0fafc mfd: tps65910: Fix wrong ack_base register 
The interrupt status registers of TPS65910/1 should be cleared
when the associated interrupt event occurs.
This work is done in the regmap irq thread - using 'ack_base' register.
The ACK registers should be fixed as status register, not mask registers.

This patch fixes the infinite interrupt event problem by clearing
interrupt status registers.

Tested on the AM3517 Craneboard.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-11-30 12:20:48 +01:00

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/*
* tps65910.c -- TI TPS6591x
*
* Copyright 2010 Texas Instruments Inc.
*
* Author: Graeme Gregory <gg@slimlogic.co.uk>
* Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
*
* 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/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/mfd/core.h>
#include <linux/regmap.h>
#include <linux/mfd/tps65910.h>
#include <linux/of_device.h>
static struct resource rtc_resources[] = {
{
.start = TPS65910_IRQ_RTC_ALARM,
.end = TPS65910_IRQ_RTC_ALARM,
.flags = IORESOURCE_IRQ,
}
};
static struct mfd_cell tps65910s[] = {
{
.name = "tps65910-gpio",
},
{
.name = "tps65910-pmic",
},
{
.name = "tps65910-rtc",
.num_resources = ARRAY_SIZE(rtc_resources),
.resources = &rtc_resources[0],
},
{
.name = "tps65910-power",
},
};
static const struct regmap_irq tps65911_irqs[] = {
/* INT_STS */
[TPS65911_IRQ_PWRHOLD_F] = {
.mask = INT_MSK_PWRHOLD_F_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65911_IRQ_VBAT_VMHI] = {
.mask = INT_MSK_VMBHI_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65911_IRQ_PWRON] = {
.mask = INT_MSK_PWRON_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65911_IRQ_PWRON_LP] = {
.mask = INT_MSK_PWRON_LP_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65911_IRQ_PWRHOLD_R] = {
.mask = INT_MSK_PWRHOLD_R_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65911_IRQ_HOTDIE] = {
.mask = INT_MSK_HOTDIE_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65911_IRQ_RTC_ALARM] = {
.mask = INT_MSK_RTC_ALARM_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65911_IRQ_RTC_PERIOD] = {
.mask = INT_MSK_RTC_PERIOD_IT_MSK_MASK,
.reg_offset = 0,
},
/* INT_STS2 */
[TPS65911_IRQ_GPIO0_R] = {
.mask = INT_MSK2_GPIO0_R_IT_MSK_MASK,
.reg_offset = 1,
},
[TPS65911_IRQ_GPIO0_F] = {
.mask = INT_MSK2_GPIO0_F_IT_MSK_MASK,
.reg_offset = 1,
},
[TPS65911_IRQ_GPIO1_R] = {
.mask = INT_MSK2_GPIO1_R_IT_MSK_MASK,
.reg_offset = 1,
},
[TPS65911_IRQ_GPIO1_F] = {
.mask = INT_MSK2_GPIO1_F_IT_MSK_MASK,
.reg_offset = 1,
},
[TPS65911_IRQ_GPIO2_R] = {
.mask = INT_MSK2_GPIO2_R_IT_MSK_MASK,
.reg_offset = 1,
},
[TPS65911_IRQ_GPIO2_F] = {
.mask = INT_MSK2_GPIO2_F_IT_MSK_MASK,
.reg_offset = 1,
},
[TPS65911_IRQ_GPIO3_R] = {
.mask = INT_MSK2_GPIO3_R_IT_MSK_MASK,
.reg_offset = 1,
},
[TPS65911_IRQ_GPIO3_F] = {
.mask = INT_MSK2_GPIO3_F_IT_MSK_MASK,
.reg_offset = 1,
},
/* INT_STS2 */
[TPS65911_IRQ_GPIO4_R] = {
.mask = INT_MSK3_GPIO4_R_IT_MSK_MASK,
.reg_offset = 2,
},
[TPS65911_IRQ_GPIO4_F] = {
.mask = INT_MSK3_GPIO4_F_IT_MSK_MASK,
.reg_offset = 2,
},
[TPS65911_IRQ_GPIO5_R] = {
.mask = INT_MSK3_GPIO5_R_IT_MSK_MASK,
.reg_offset = 2,
},
[TPS65911_IRQ_GPIO5_F] = {
.mask = INT_MSK3_GPIO5_F_IT_MSK_MASK,
.reg_offset = 2,
},
[TPS65911_IRQ_WTCHDG] = {
.mask = INT_MSK3_WTCHDG_IT_MSK_MASK,
.reg_offset = 2,
},
[TPS65911_IRQ_VMBCH2_H] = {
.mask = INT_MSK3_VMBCH2_H_IT_MSK_MASK,
.reg_offset = 2,
},
[TPS65911_IRQ_VMBCH2_L] = {
.mask = INT_MSK3_VMBCH2_L_IT_MSK_MASK,
.reg_offset = 2,
},
[TPS65911_IRQ_PWRDN] = {
.mask = INT_MSK3_PWRDN_IT_MSK_MASK,
.reg_offset = 2,
},
};
static const struct regmap_irq tps65910_irqs[] = {
/* INT_STS */
[TPS65910_IRQ_VBAT_VMBDCH] = {
.mask = TPS65910_INT_MSK_VMBDCH_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65910_IRQ_VBAT_VMHI] = {
.mask = TPS65910_INT_MSK_VMBHI_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65910_IRQ_PWRON] = {
.mask = TPS65910_INT_MSK_PWRON_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65910_IRQ_PWRON_LP] = {
.mask = TPS65910_INT_MSK_PWRON_LP_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65910_IRQ_PWRHOLD] = {
.mask = TPS65910_INT_MSK_PWRHOLD_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65910_IRQ_HOTDIE] = {
.mask = TPS65910_INT_MSK_HOTDIE_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65910_IRQ_RTC_ALARM] = {
.mask = TPS65910_INT_MSK_RTC_ALARM_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65910_IRQ_RTC_PERIOD] = {
.mask = TPS65910_INT_MSK_RTC_PERIOD_IT_MSK_MASK,
.reg_offset = 0,
},
/* INT_STS2 */
[TPS65910_IRQ_GPIO_R] = {
.mask = TPS65910_INT_MSK2_GPIO0_F_IT_MSK_MASK,
.reg_offset = 1,
},
[TPS65910_IRQ_GPIO_F] = {
.mask = TPS65910_INT_MSK2_GPIO0_R_IT_MSK_MASK,
.reg_offset = 1,
},
};
static struct regmap_irq_chip tps65911_irq_chip = {
.name = "tps65910",
.irqs = tps65911_irqs,
.num_irqs = ARRAY_SIZE(tps65911_irqs),
.num_regs = 3,
.irq_reg_stride = 2,
.status_base = TPS65910_INT_STS,
.mask_base = TPS65910_INT_MSK,
.ack_base = TPS65910_INT_STS,
};
static struct regmap_irq_chip tps65910_irq_chip = {
.name = "tps65910",
.irqs = tps65910_irqs,
.num_irqs = ARRAY_SIZE(tps65910_irqs),
.num_regs = 2,
.irq_reg_stride = 2,
.status_base = TPS65910_INT_STS,
.mask_base = TPS65910_INT_MSK,
.ack_base = TPS65910_INT_STS,
};
static int tps65910_irq_init(struct tps65910 *tps65910, int irq,
struct tps65910_platform_data *pdata)
{
int ret = 0;
static struct regmap_irq_chip *tps6591x_irqs_chip;
if (!irq) {
dev_warn(tps65910->dev, "No interrupt support, no core IRQ\n");
return -EINVAL;
}
if (!pdata) {
dev_warn(tps65910->dev, "No interrupt support, no pdata\n");
return -EINVAL;
}
switch (tps65910_chip_id(tps65910)) {
case TPS65910:
tps6591x_irqs_chip = &tps65910_irq_chip;
break;
case TPS65911:
tps6591x_irqs_chip = &tps65911_irq_chip;
break;
}
tps65910->chip_irq = irq;
ret = regmap_add_irq_chip(tps65910->regmap, tps65910->chip_irq,
IRQF_ONESHOT, pdata->irq_base,
tps6591x_irqs_chip, &tps65910->irq_data);
if (ret < 0)
dev_warn(tps65910->dev, "Failed to add irq_chip %d\n", ret);
return ret;
}
static int tps65910_irq_exit(struct tps65910 *tps65910)
{
if (tps65910->chip_irq > 0)
regmap_del_irq_chip(tps65910->chip_irq, tps65910->irq_data);
return 0;
}
static bool is_volatile_reg(struct device *dev, unsigned int reg)
{
struct tps65910 *tps65910 = dev_get_drvdata(dev);
/*
* Caching all regulator registers.
* All regualator register address range is same for
* TPS65910 and TPS65911
*/
if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) {
/* Check for non-existing register */
if (tps65910_chip_id(tps65910) == TPS65910)
if ((reg == TPS65911_VDDCTRL_OP) ||
(reg == TPS65911_VDDCTRL_SR))
return true;
return false;
}
return true;
}
static const struct regmap_config tps65910_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.volatile_reg = is_volatile_reg,
.max_register = TPS65910_MAX_REGISTER - 1,
.cache_type = REGCACHE_RBTREE,
};
static int __devinit tps65910_ck32k_init(struct tps65910 *tps65910,
struct tps65910_board *pmic_pdata)
{
int ret;
if (!pmic_pdata->en_ck32k_xtal)
return 0;
ret = tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
DEVCTRL_CK32K_CTRL_MASK);
if (ret < 0) {
dev_err(tps65910->dev, "clear ck32k_ctrl failed: %d\n", ret);
return ret;
}
return 0;
}
static int __devinit tps65910_sleepinit(struct tps65910 *tps65910,
struct tps65910_board *pmic_pdata)
{
struct device *dev = NULL;
int ret = 0;
dev = tps65910->dev;
if (!pmic_pdata->en_dev_slp)
return 0;
/* enabling SLEEP device state */
ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
DEVCTRL_DEV_SLP_MASK);
if (ret < 0) {
dev_err(dev, "set dev_slp failed: %d\n", ret);
goto err_sleep_init;
}
/* Return if there is no sleep keepon data. */
if (!pmic_pdata->slp_keepon)
return 0;
if (pmic_pdata->slp_keepon->therm_keepon) {
ret = tps65910_reg_set_bits(tps65910,
TPS65910_SLEEP_KEEP_RES_ON,
SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK);
if (ret < 0) {
dev_err(dev, "set therm_keepon failed: %d\n", ret);
goto disable_dev_slp;
}
}
if (pmic_pdata->slp_keepon->clkout32k_keepon) {
ret = tps65910_reg_set_bits(tps65910,
TPS65910_SLEEP_KEEP_RES_ON,
SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK);
if (ret < 0) {
dev_err(dev, "set clkout32k_keepon failed: %d\n", ret);
goto disable_dev_slp;
}
}
if (pmic_pdata->slp_keepon->i2chs_keepon) {
ret = tps65910_reg_set_bits(tps65910,
TPS65910_SLEEP_KEEP_RES_ON,
SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK);
if (ret < 0) {
dev_err(dev, "set i2chs_keepon failed: %d\n", ret);
goto disable_dev_slp;
}
}
return 0;
disable_dev_slp:
tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
DEVCTRL_DEV_SLP_MASK);
err_sleep_init:
return ret;
}
#ifdef CONFIG_OF
static struct of_device_id tps65910_of_match[] = {
{ .compatible = "ti,tps65910", .data = (void *)TPS65910},
{ .compatible = "ti,tps65911", .data = (void *)TPS65911},
{ },
};
MODULE_DEVICE_TABLE(of, tps65910_of_match);
static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
int *chip_id)
{
struct device_node *np = client->dev.of_node;
struct tps65910_board *board_info;
unsigned int prop;
const struct of_device_id *match;
int ret = 0;
match = of_match_device(tps65910_of_match, &client->dev);
if (!match) {
dev_err(&client->dev, "Failed to find matching dt id\n");
return NULL;
}
*chip_id = (int)match->data;
board_info = devm_kzalloc(&client->dev, sizeof(*board_info),
GFP_KERNEL);
if (!board_info) {
dev_err(&client->dev, "Failed to allocate pdata\n");
return NULL;
}
ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop);
if (!ret)
board_info->vmbch_threshold = prop;
else if (*chip_id == TPS65911)
dev_warn(&client->dev, "VMBCH-Threshold not specified");
ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop);
if (!ret)
board_info->vmbch2_threshold = prop;
else if (*chip_id == TPS65911)
dev_warn(&client->dev, "VMBCH2-Threshold not specified");
prop = of_property_read_bool(np, "ti,en-ck32k-xtal");
board_info->en_ck32k_xtal = prop;
board_info->irq = client->irq;
board_info->irq_base = -1;
board_info->pm_off = of_property_read_bool(np,
"ti,system-power-controller");
return board_info;
}
#else
static inline
struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
int *chip_id)
{
return NULL;
}
#endif
static struct i2c_client *tps65910_i2c_client;
static void tps65910_power_off(void)
{
struct tps65910 *tps65910;
tps65910 = dev_get_drvdata(&tps65910_i2c_client->dev);
if (tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
DEVCTRL_PWR_OFF_MASK) < 0)
return;
tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
DEVCTRL_DEV_ON_MASK);
}
static __devinit int tps65910_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct tps65910 *tps65910;
struct tps65910_board *pmic_plat_data;
struct tps65910_board *of_pmic_plat_data = NULL;
struct tps65910_platform_data *init_data;
int ret = 0;
int chip_id = id->driver_data;
pmic_plat_data = dev_get_platdata(&i2c->dev);
if (!pmic_plat_data && i2c->dev.of_node) {
pmic_plat_data = tps65910_parse_dt(i2c, &chip_id);
of_pmic_plat_data = pmic_plat_data;
}
if (!pmic_plat_data)
return -EINVAL;
init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL);
if (init_data == NULL)
return -ENOMEM;
tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL);
if (tps65910 == NULL)
return -ENOMEM;
tps65910->of_plat_data = of_pmic_plat_data;
i2c_set_clientdata(i2c, tps65910);
tps65910->dev = &i2c->dev;
tps65910->i2c_client = i2c;
tps65910->id = chip_id;
tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config);
if (IS_ERR(tps65910->regmap)) {
ret = PTR_ERR(tps65910->regmap);
dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
return ret;
}
init_data->irq = pmic_plat_data->irq;
init_data->irq_base = pmic_plat_data->irq_base;
tps65910_irq_init(tps65910, init_data->irq, init_data);
tps65910_ck32k_init(tps65910, pmic_plat_data);
tps65910_sleepinit(tps65910, pmic_plat_data);
if (pmic_plat_data->pm_off && !pm_power_off) {
tps65910_i2c_client = i2c;
pm_power_off = tps65910_power_off;
}
ret = mfd_add_devices(tps65910->dev, -1,
tps65910s, ARRAY_SIZE(tps65910s),
NULL, 0,
regmap_irq_get_domain(tps65910->irq_data));
if (ret < 0) {
dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret);
return ret;
}
return ret;
}
static __devexit int tps65910_i2c_remove(struct i2c_client *i2c)
{
struct tps65910 *tps65910 = i2c_get_clientdata(i2c);
tps65910_irq_exit(tps65910);
mfd_remove_devices(tps65910->dev);
return 0;
}
static const struct i2c_device_id tps65910_i2c_id[] = {
{ "tps65910", TPS65910 },
{ "tps65911", TPS65911 },
{ }
};
MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id);
static struct i2c_driver tps65910_i2c_driver = {
.driver = {
.name = "tps65910",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(tps65910_of_match),
},
.probe = tps65910_i2c_probe,
.remove = __devexit_p(tps65910_i2c_remove),
.id_table = tps65910_i2c_id,
};
static int __init tps65910_i2c_init(void)
{
return i2c_add_driver(&tps65910_i2c_driver);
}
/* init early so consumer devices can complete system boot */
subsys_initcall(tps65910_i2c_init);
static void __exit tps65910_i2c_exit(void)
{
i2c_del_driver(&tps65910_i2c_driver);
}
module_exit(tps65910_i2c_exit);
MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>");
MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
MODULE_LICENSE("GPL");
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