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linux-next/drivers/mfd/tps65090.c
Doug Anderson c42ba72ec3 mfd: tps65090: Stop caching most registers 
Nearly all of the registers in tps65090 combine control bits and
status bits.  Turn off caching of all registers except the select few
that can be cached.

In order to avoid adding more duplicate #defines, we also move some
register offset definitions to the mfd driver (and resolve
inconsistent names).

Signed-off-by: Doug Anderson <dianders@chromium.org>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-04-23 12:32:19 +01:00

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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 TOTAL_NUM_REG 0x18
#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 = TOTAL_NUM_REG,
.num_reg_defaults_raw = TOTAL_NUM_REG,
.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",
.owner = THIS_MODULE,
.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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