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linux-next/drivers/mfd/tps65090.c
Maciej S. Szmigiero 5c1488906f mfd: tps65090: Set regmap config reg counts properly 
Regmap config max_register field should contain number of
device last register, however num_reg_defaults_raw field
should be set to register count instead
(usually one register more than max_register).

tps65090 driver had both of these fields set to the same value,
fix this by introducing separate defines for max register
number and total count of registers.

Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-03-16 08:50:36 +00:00

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/*
* Core driver for TI TPS65090 PMIC family
*
* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps65090.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/err.h>
#define NUM_INT_REG 2
#define TPS65090_INT1_MASK_VAC_STATUS_CHANGE 1
#define TPS65090_INT1_MASK_VSYS_STATUS_CHANGE 2
#define TPS65090_INT1_MASK_BAT_STATUS_CHANGE 3
#define TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE 4
#define TPS65090_INT1_MASK_CHARGING_COMPLETE 5
#define TPS65090_INT1_MASK_OVERLOAD_DCDC1 6
#define TPS65090_INT1_MASK_OVERLOAD_DCDC2 7
#define TPS65090_INT2_MASK_OVERLOAD_DCDC3 0
#define TPS65090_INT2_MASK_OVERLOAD_FET1 1
#define TPS65090_INT2_MASK_OVERLOAD_FET2 2
#define TPS65090_INT2_MASK_OVERLOAD_FET3 3
#define TPS65090_INT2_MASK_OVERLOAD_FET4 4
#define TPS65090_INT2_MASK_OVERLOAD_FET5 5
#define TPS65090_INT2_MASK_OVERLOAD_FET6 6
#define TPS65090_INT2_MASK_OVERLOAD_FET7 7
static struct resource charger_resources[] = {
{
.start = TPS65090_IRQ_VAC_STATUS_CHANGE,
.end = TPS65090_IRQ_VAC_STATUS_CHANGE,
.flags = IORESOURCE_IRQ,
}
};
enum tps65090_cells {
PMIC = 0,
CHARGER = 1,
};
static struct mfd_cell tps65090s[] = {
[PMIC] = {
.name = "tps65090-pmic",
},
[CHARGER] = {
.name = "tps65090-charger",
.num_resources = ARRAY_SIZE(charger_resources),
.resources = &charger_resources[0],
.of_compatible = "ti,tps65090-charger",
},
};
static const struct regmap_irq tps65090_irqs[] = {
/* INT1 IRQs*/
[TPS65090_IRQ_VAC_STATUS_CHANGE] = {
.mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE,
},
[TPS65090_IRQ_VSYS_STATUS_CHANGE] = {
.mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE,
},
[TPS65090_IRQ_BAT_STATUS_CHANGE] = {
.mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE,
},
[TPS65090_IRQ_CHARGING_STATUS_CHANGE] = {
.mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE,
},
[TPS65090_IRQ_CHARGING_COMPLETE] = {
.mask = TPS65090_INT1_MASK_CHARGING_COMPLETE,
},
[TPS65090_IRQ_OVERLOAD_DCDC1] = {
.mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1,
},
[TPS65090_IRQ_OVERLOAD_DCDC2] = {
.mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2,
},
/* INT2 IRQs*/
[TPS65090_IRQ_OVERLOAD_DCDC3] = {
.reg_offset = 1,
.mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3,
},
[TPS65090_IRQ_OVERLOAD_FET1] = {
.reg_offset = 1,
.mask = TPS65090_INT2_MASK_OVERLOAD_FET1,
},
[TPS65090_IRQ_OVERLOAD_FET2] = {
.reg_offset = 1,
.mask = TPS65090_INT2_MASK_OVERLOAD_FET2,
},
[TPS65090_IRQ_OVERLOAD_FET3] = {
.reg_offset = 1,
.mask = TPS65090_INT2_MASK_OVERLOAD_FET3,
},
[TPS65090_IRQ_OVERLOAD_FET4] = {
.reg_offset = 1,
.mask = TPS65090_INT2_MASK_OVERLOAD_FET4,
},
[TPS65090_IRQ_OVERLOAD_FET5] = {
.reg_offset = 1,
.mask = TPS65090_INT2_MASK_OVERLOAD_FET5,
},
[TPS65090_IRQ_OVERLOAD_FET6] = {
.reg_offset = 1,
.mask = TPS65090_INT2_MASK_OVERLOAD_FET6,
},
[TPS65090_IRQ_OVERLOAD_FET7] = {
.reg_offset = 1,
.mask = TPS65090_INT2_MASK_OVERLOAD_FET7,
},
};
static struct regmap_irq_chip tps65090_irq_chip = {
.name = "tps65090",
.irqs = tps65090_irqs,
.num_irqs = ARRAY_SIZE(tps65090_irqs),
.num_regs = NUM_INT_REG,
.status_base = TPS65090_REG_INTR_STS,
.mask_base = TPS65090_REG_INTR_MASK,
.mask_invert = true,
};
static bool is_volatile_reg(struct device *dev, unsigned int reg)
{
/* Nearly all registers have status bits mixed in, except a few */
switch (reg) {
case TPS65090_REG_INTR_MASK:
case TPS65090_REG_INTR_MASK2:
case TPS65090_REG_CG_CTRL0:
case TPS65090_REG_CG_CTRL1:
case TPS65090_REG_CG_CTRL2:
case TPS65090_REG_CG_CTRL3:
case TPS65090_REG_CG_CTRL4:
case TPS65090_REG_CG_CTRL5:
return false;
}
return true;
}
static const struct regmap_config tps65090_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = TPS65090_MAX_REG,
.num_reg_defaults_raw = TPS65090_NUM_REGS,
.cache_type = REGCACHE_RBTREE,
.volatile_reg = is_volatile_reg,
};
#ifdef CONFIG_OF
static const struct of_device_id tps65090_of_match[] = {
{ .compatible = "ti,tps65090",},
{},
};
MODULE_DEVICE_TABLE(of, tps65090_of_match);
#endif
static int tps65090_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct tps65090_platform_data *pdata = dev_get_platdata(&client->dev);
int irq_base = 0;
struct tps65090 *tps65090;
int ret;
if (!pdata && !client->dev.of_node) {
dev_err(&client->dev,
"tps65090 requires platform data or of_node\n");
return -EINVAL;
}
if (pdata)
irq_base = pdata->irq_base;
tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL);
if (!tps65090) {
dev_err(&client->dev, "mem alloc for tps65090 failed\n");
return -ENOMEM;
}
tps65090->dev = &client->dev;
i2c_set_clientdata(client, tps65090);
tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config);
if (IS_ERR(tps65090->rmap)) {
ret = PTR_ERR(tps65090->rmap);
dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
return ret;
}
if (client->irq) {
ret = regmap_add_irq_chip(tps65090->rmap, client->irq,
IRQF_ONESHOT | IRQF_TRIGGER_LOW, irq_base,
&tps65090_irq_chip, &tps65090->irq_data);
if (ret) {
dev_err(&client->dev,
"IRQ init failed with err: %d\n", ret);
return ret;
}
} else {
/* Don't tell children they have an IRQ that'll never fire */
tps65090s[CHARGER].num_resources = 0;
}
ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
ARRAY_SIZE(tps65090s), NULL,
0, regmap_irq_get_domain(tps65090->irq_data));
if (ret) {
dev_err(&client->dev, "add mfd devices failed with err: %d\n",
ret);
goto err_irq_exit;
}
return 0;
err_irq_exit:
if (client->irq)
regmap_del_irq_chip(client->irq, tps65090->irq_data);
return ret;
}
static int tps65090_i2c_remove(struct i2c_client *client)
{
struct tps65090 *tps65090 = i2c_get_clientdata(client);
mfd_remove_devices(tps65090->dev);
if (client->irq)
regmap_del_irq_chip(client->irq, tps65090->irq_data);
return 0;
}
static const struct i2c_device_id tps65090_id_table[] = {
{ "tps65090", 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, tps65090_id_table);
static struct i2c_driver tps65090_driver = {
.driver = {
.name = "tps65090",
.of_match_table = of_match_ptr(tps65090_of_match),
},
.probe = tps65090_i2c_probe,
.remove = tps65090_i2c_remove,
.id_table = tps65090_id_table,
};
static int __init tps65090_init(void)
{
return i2c_add_driver(&tps65090_driver);
}
subsys_initcall(tps65090_init);
static void __exit tps65090_exit(void)
{
i2c_del_driver(&tps65090_driver);
}
module_exit(tps65090_exit);
MODULE_DESCRIPTION("TPS65090 core driver");
MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
MODULE_LICENSE("GPL v2");
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