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alistair23-linux/drivers/mfd/88pm800.c
Mark Brown 0848c94fb4 mfd: core: Push irqdomain mapping out into devices 
Currently the MFD core supports remapping MFD cell interrupts using an
irqdomain but only if the MFD is being instantiated using device tree
and only if the device tree bindings use the pattern of registering IPs
in the device tree with compatible properties.  This will be actively
harmful for drivers which support non-DT platforms and use this pattern
for their DT bindings as it will mean that the core will silently change
remapping behaviour and it is also limiting for drivers which don't do
DT with this particular pattern.  There is also a potential fragility if
there are interrupts not associated with MFD cells and all the cells are
omitted from the device tree for some reason.

Instead change the code to take an IRQ domain as an optional argument,
allowing drivers to take the decision about the parent domain for their
interrupts.  The one current user of this feature is ab8500-core, it has
the domain lookup pushed out into the driver.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-09-15 23:22:04 +02:00

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/*
* Base driver for Marvell 88PM800
*
* Copyright (C) 2012 Marvell International Ltd.
* Haojian Zhuang <haojian.zhuang@marvell.com>
* Joseph(Yossi) Hanin <yhanin@marvell.com>
* Qiao Zhou <zhouqiao@marvell.com>
*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file "COPYING" in the main directory of this
* archive for more details.
*
* This program is distributed in the hope that 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/mfd/core.h>
#include <linux/mfd/88pm80x.h>
#include <linux/slab.h>
#define PM800_CHIP_ID (0x00)
/* Interrupt Registers */
#define PM800_INT_STATUS1 (0x05)
#define PM800_ONKEY_INT_STS1 (1 << 0)
#define PM800_EXTON_INT_STS1 (1 << 1)
#define PM800_CHG_INT_STS1 (1 << 2)
#define PM800_BAT_INT_STS1 (1 << 3)
#define PM800_RTC_INT_STS1 (1 << 4)
#define PM800_CLASSD_OC_INT_STS1 (1 << 5)
#define PM800_INT_STATUS2 (0x06)
#define PM800_VBAT_INT_STS2 (1 << 0)
#define PM800_VSYS_INT_STS2 (1 << 1)
#define PM800_VCHG_INT_STS2 (1 << 2)
#define PM800_TINT_INT_STS2 (1 << 3)
#define PM800_GPADC0_INT_STS2 (1 << 4)
#define PM800_TBAT_INT_STS2 (1 << 5)
#define PM800_GPADC2_INT_STS2 (1 << 6)
#define PM800_GPADC3_INT_STS2 (1 << 7)
#define PM800_INT_STATUS3 (0x07)
#define PM800_INT_STATUS4 (0x08)
#define PM800_GPIO0_INT_STS4 (1 << 0)
#define PM800_GPIO1_INT_STS4 (1 << 1)
#define PM800_GPIO2_INT_STS4 (1 << 2)
#define PM800_GPIO3_INT_STS4 (1 << 3)
#define PM800_GPIO4_INT_STS4 (1 << 4)
#define PM800_INT_ENA_1 (0x09)
#define PM800_ONKEY_INT_ENA1 (1 << 0)
#define PM800_EXTON_INT_ENA1 (1 << 1)
#define PM800_CHG_INT_ENA1 (1 << 2)
#define PM800_BAT_INT_ENA1 (1 << 3)
#define PM800_RTC_INT_ENA1 (1 << 4)
#define PM800_CLASSD_OC_INT_ENA1 (1 << 5)
#define PM800_INT_ENA_2 (0x0A)
#define PM800_VBAT_INT_ENA2 (1 << 0)
#define PM800_VSYS_INT_ENA2 (1 << 1)
#define PM800_VCHG_INT_ENA2 (1 << 2)
#define PM800_TINT_INT_ENA2 (1 << 3)
#define PM800_INT_ENA_3 (0x0B)
#define PM800_GPADC0_INT_ENA3 (1 << 0)
#define PM800_GPADC1_INT_ENA3 (1 << 1)
#define PM800_GPADC2_INT_ENA3 (1 << 2)
#define PM800_GPADC3_INT_ENA3 (1 << 3)
#define PM800_GPADC4_INT_ENA3 (1 << 4)
#define PM800_INT_ENA_4 (0x0C)
#define PM800_GPIO0_INT_ENA4 (1 << 0)
#define PM800_GPIO1_INT_ENA4 (1 << 1)
#define PM800_GPIO2_INT_ENA4 (1 << 2)
#define PM800_GPIO3_INT_ENA4 (1 << 3)
#define PM800_GPIO4_INT_ENA4 (1 << 4)
/* number of INT_ENA & INT_STATUS regs */
#define PM800_INT_REG_NUM (4)
/* Interrupt Number in 88PM800 */
enum {
PM800_IRQ_ONKEY, /*EN1b0 *//*0 */
PM800_IRQ_EXTON, /*EN1b1 */
PM800_IRQ_CHG, /*EN1b2 */
PM800_IRQ_BAT, /*EN1b3 */
PM800_IRQ_RTC, /*EN1b4 */
PM800_IRQ_CLASSD, /*EN1b5 *//*5 */
PM800_IRQ_VBAT, /*EN2b0 */
PM800_IRQ_VSYS, /*EN2b1 */
PM800_IRQ_VCHG, /*EN2b2 */
PM800_IRQ_TINT, /*EN2b3 */
PM800_IRQ_GPADC0, /*EN3b0 *//*10 */
PM800_IRQ_GPADC1, /*EN3b1 */
PM800_IRQ_GPADC2, /*EN3b2 */
PM800_IRQ_GPADC3, /*EN3b3 */
PM800_IRQ_GPADC4, /*EN3b4 */
PM800_IRQ_GPIO0, /*EN4b0 *//*15 */
PM800_IRQ_GPIO1, /*EN4b1 */
PM800_IRQ_GPIO2, /*EN4b2 */
PM800_IRQ_GPIO3, /*EN4b3 */
PM800_IRQ_GPIO4, /*EN4b4 *//*19 */
PM800_MAX_IRQ,
};
enum {
/* Procida */
PM800_CHIP_A0 = 0x60,
PM800_CHIP_A1 = 0x61,
PM800_CHIP_B0 = 0x62,
PM800_CHIP_C0 = 0x63,
PM800_CHIP_END = PM800_CHIP_C0,
/* Make sure to update this to the last stepping */
PM8XXX_CHIP_END = PM800_CHIP_END
};
static const struct i2c_device_id pm80x_id_table[] = {
{"88PM800", CHIP_PM800},
{} /* NULL terminated */
};
MODULE_DEVICE_TABLE(i2c, pm80x_id_table);
static struct resource rtc_resources[] = {
{
.name = "88pm80x-rtc",
.start = PM800_IRQ_RTC,
.end = PM800_IRQ_RTC,
.flags = IORESOURCE_IRQ,
},
};
static struct mfd_cell rtc_devs[] = {
{
.name = "88pm80x-rtc",
.num_resources = ARRAY_SIZE(rtc_resources),
.resources = &rtc_resources[0],
.id = -1,
},
};
static struct resource onkey_resources[] = {
{
.name = "88pm80x-onkey",
.start = PM800_IRQ_ONKEY,
.end = PM800_IRQ_ONKEY,
.flags = IORESOURCE_IRQ,
},
};
static struct mfd_cell onkey_devs[] = {
{
.name = "88pm80x-onkey",
.num_resources = 1,
.resources = &onkey_resources[0],
.id = -1,
},
};
static const struct regmap_irq pm800_irqs[] = {
/* INT0 */
[PM800_IRQ_ONKEY] = {
.mask = PM800_ONKEY_INT_ENA1,
},
[PM800_IRQ_EXTON] = {
.mask = PM800_EXTON_INT_ENA1,
},
[PM800_IRQ_CHG] = {
.mask = PM800_CHG_INT_ENA1,
},
[PM800_IRQ_BAT] = {
.mask = PM800_BAT_INT_ENA1,
},
[PM800_IRQ_RTC] = {
.mask = PM800_RTC_INT_ENA1,
},
[PM800_IRQ_CLASSD] = {
.mask = PM800_CLASSD_OC_INT_ENA1,
},
/* INT1 */
[PM800_IRQ_VBAT] = {
.reg_offset = 1,
.mask = PM800_VBAT_INT_ENA2,
},
[PM800_IRQ_VSYS] = {
.reg_offset = 1,
.mask = PM800_VSYS_INT_ENA2,
},
[PM800_IRQ_VCHG] = {
.reg_offset = 1,
.mask = PM800_VCHG_INT_ENA2,
},
[PM800_IRQ_TINT] = {
.reg_offset = 1,
.mask = PM800_TINT_INT_ENA2,
},
/* INT2 */
[PM800_IRQ_GPADC0] = {
.reg_offset = 2,
.mask = PM800_GPADC0_INT_ENA3,
},
[PM800_IRQ_GPADC1] = {
.reg_offset = 2,
.mask = PM800_GPADC1_INT_ENA3,
},
[PM800_IRQ_GPADC2] = {
.reg_offset = 2,
.mask = PM800_GPADC2_INT_ENA3,
},
[PM800_IRQ_GPADC3] = {
.reg_offset = 2,
.mask = PM800_GPADC3_INT_ENA3,
},
[PM800_IRQ_GPADC4] = {
.reg_offset = 2,
.mask = PM800_GPADC4_INT_ENA3,
},
/* INT3 */
[PM800_IRQ_GPIO0] = {
.reg_offset = 3,
.mask = PM800_GPIO0_INT_ENA4,
},
[PM800_IRQ_GPIO1] = {
.reg_offset = 3,
.mask = PM800_GPIO1_INT_ENA4,
},
[PM800_IRQ_GPIO2] = {
.reg_offset = 3,
.mask = PM800_GPIO2_INT_ENA4,
},
[PM800_IRQ_GPIO3] = {
.reg_offset = 3,
.mask = PM800_GPIO3_INT_ENA4,
},
[PM800_IRQ_GPIO4] = {
.reg_offset = 3,
.mask = PM800_GPIO4_INT_ENA4,
},
};
static int __devinit device_gpadc_init(struct pm80x_chip *chip,
struct pm80x_platform_data *pdata)
{
struct pm80x_subchip *subchip = chip->subchip;
struct regmap *map = subchip->regmap_gpadc;
int data = 0, mask = 0, ret = 0;
if (!map) {
dev_warn(chip->dev,
"Warning: gpadc regmap is not available!\n");
return -EINVAL;
}
/*
* initialize GPADC without activating it turn on GPADC
* measurments
*/
ret = regmap_update_bits(map,
PM800_GPADC_MISC_CONFIG2,
PM800_GPADC_MISC_GPFSM_EN,
PM800_GPADC_MISC_GPFSM_EN);
if (ret < 0)
goto out;
/*
* This function configures the ADC as requires for
* CP implementation.CP does not "own" the ADC configuration
* registers and relies on AP.
* Reason: enable automatic ADC measurements needed
* for CP to get VBAT and RF temperature readings.
*/
ret = regmap_update_bits(map, PM800_GPADC_MEAS_EN1,
PM800_MEAS_EN1_VBAT, PM800_MEAS_EN1_VBAT);
if (ret < 0)
goto out;
ret = regmap_update_bits(map, PM800_GPADC_MEAS_EN2,
(PM800_MEAS_EN2_RFTMP | PM800_MEAS_GP0_EN),
(PM800_MEAS_EN2_RFTMP | PM800_MEAS_GP0_EN));
if (ret < 0)
goto out;
/*
* the defult of PM800 is GPADC operates at 100Ks/s rate
* and Number of GPADC slots with active current bias prior
* to GPADC sampling = 1 slot for all GPADCs set for
* Temprature mesurmants
*/
mask = (PM800_GPADC_GP_BIAS_EN0 | PM800_GPADC_GP_BIAS_EN1 |
PM800_GPADC_GP_BIAS_EN2 | PM800_GPADC_GP_BIAS_EN3);
if (pdata && (pdata->batt_det == 0))
data = (PM800_GPADC_GP_BIAS_EN0 | PM800_GPADC_GP_BIAS_EN1 |
PM800_GPADC_GP_BIAS_EN2 | PM800_GPADC_GP_BIAS_EN3);
else
data = (PM800_GPADC_GP_BIAS_EN0 | PM800_GPADC_GP_BIAS_EN2 |
PM800_GPADC_GP_BIAS_EN3);
ret = regmap_update_bits(map, PM800_GP_BIAS_ENA1, mask, data);
if (ret < 0)
goto out;
dev_info(chip->dev, "pm800 device_gpadc_init: Done\n");
return 0;
out:
dev_info(chip->dev, "pm800 device_gpadc_init: Failed!\n");
return ret;
}
static int __devinit device_irq_init_800(struct pm80x_chip *chip)
{
struct regmap *map = chip->regmap;
unsigned long flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT;
int data, mask, ret = -EINVAL;
if (!map || !chip->irq) {
dev_err(chip->dev, "incorrect parameters\n");
return -EINVAL;
}
/*
* irq_mode defines the way of clearing interrupt. it's read-clear by
* default.
*/
mask =
PM800_WAKEUP2_INV_INT | PM800_WAKEUP2_INT_CLEAR |
PM800_WAKEUP2_INT_MASK;
data = PM800_WAKEUP2_INT_CLEAR;
ret = regmap_update_bits(map, PM800_WAKEUP2, mask, data);
if (ret < 0)
goto out;
ret =
regmap_add_irq_chip(chip->regmap, chip->irq, flags, -1,
chip->regmap_irq_chip, &chip->irq_data);
out:
return ret;
}
static void device_irq_exit_800(struct pm80x_chip *chip)
{
regmap_del_irq_chip(chip->irq, chip->irq_data);
}
static struct regmap_irq_chip pm800_irq_chip = {
.name = "88pm800",
.irqs = pm800_irqs,
.num_irqs = ARRAY_SIZE(pm800_irqs),
.num_regs = 4,
.status_base = PM800_INT_STATUS1,
.mask_base = PM800_INT_ENA_1,
.ack_base = PM800_INT_STATUS1,
};
static int pm800_pages_init(struct pm80x_chip *chip)
{
struct pm80x_subchip *subchip;
struct i2c_client *client = chip->client;
subchip = chip->subchip;
/* PM800 block power: i2c addr 0x31 */
if (subchip->power_page_addr) {
subchip->power_page =
i2c_new_dummy(client->adapter, subchip->power_page_addr);
subchip->regmap_power =
devm_regmap_init_i2c(subchip->power_page,
&pm80x_regmap_config);
i2c_set_clientdata(subchip->power_page, chip);
} else
dev_info(chip->dev,
"PM800 block power 0x31: No power_page_addr\n");
/* PM800 block GPADC: i2c addr 0x32 */
if (subchip->gpadc_page_addr) {
subchip->gpadc_page = i2c_new_dummy(client->adapter,
subchip->gpadc_page_addr);
subchip->regmap_gpadc =
devm_regmap_init_i2c(subchip->gpadc_page,
&pm80x_regmap_config);
i2c_set_clientdata(subchip->gpadc_page, chip);
} else
dev_info(chip->dev,
"PM800 block GPADC 0x32: No gpadc_page_addr\n");
return 0;
}
static void pm800_pages_exit(struct pm80x_chip *chip)
{
struct pm80x_subchip *subchip;
regmap_exit(chip->regmap);
i2c_unregister_device(chip->client);
subchip = chip->subchip;
if (subchip->power_page) {
regmap_exit(subchip->regmap_power);
i2c_unregister_device(subchip->power_page);
}
if (subchip->gpadc_page) {
regmap_exit(subchip->regmap_gpadc);
i2c_unregister_device(subchip->gpadc_page);
}
}
static int __devinit device_800_init(struct pm80x_chip *chip,
struct pm80x_platform_data *pdata)
{
int ret, pmic_id;
unsigned int val;
ret = regmap_read(chip->regmap, PM800_CHIP_ID, &val);
if (ret < 0) {
dev_err(chip->dev, "Failed to read CHIP ID: %d\n", ret);
goto out;
}
pmic_id = val & PM80X_VERSION_MASK;
if ((pmic_id >= PM800_CHIP_A0) && (pmic_id <= PM800_CHIP_END)) {
chip->version = val;
dev_info(chip->dev,
"88PM80x:Marvell 88PM800 (ID:0x%x) detected\n", val);
} else {
dev_err(chip->dev,
"Failed to detect Marvell 88PM800:ChipID[0x%x]\n", val);
ret = -EINVAL;
goto out;
}
/*
* alarm wake up bit will be clear in device_irq_init(),
* read before that
*/
ret = regmap_read(chip->regmap, PM800_RTC_CONTROL, &val);
if (ret < 0) {
dev_err(chip->dev, "Failed to read RTC register: %d\n", ret);
goto out;
}
if (val & PM800_ALARM_WAKEUP) {
if (pdata && pdata->rtc)
pdata->rtc->rtc_wakeup = 1;
}
ret = device_gpadc_init(chip, pdata);
if (ret < 0) {
dev_err(chip->dev, "[%s]Failed to init gpadc\n", __func__);
goto out;
}
chip->regmap_irq_chip = &pm800_irq_chip;
ret = device_irq_init_800(chip);
if (ret < 0) {
dev_err(chip->dev, "[%s]Failed to init pm800 irq\n", __func__);
goto out;
}
ret =
mfd_add_devices(chip->dev, 0, &onkey_devs[0],
ARRAY_SIZE(onkey_devs), &onkey_resources[0], 0,
NULL);
if (ret < 0) {
dev_err(chip->dev, "Failed to add onkey subdev\n");
goto out_dev;
} else
dev_info(chip->dev, "[%s]:Added mfd onkey_devs\n", __func__);
if (pdata && pdata->rtc) {
rtc_devs[0].platform_data = pdata->rtc;
rtc_devs[0].pdata_size = sizeof(struct pm80x_rtc_pdata);
ret = mfd_add_devices(chip->dev, 0, &rtc_devs[0],
ARRAY_SIZE(rtc_devs), NULL, 0, NULL);
if (ret < 0) {
dev_err(chip->dev, "Failed to add rtc subdev\n");
goto out_dev;
} else
dev_info(chip->dev,
"[%s]:Added mfd rtc_devs\n", __func__);
}
return 0;
out_dev:
mfd_remove_devices(chip->dev);
device_irq_exit_800(chip);
out:
return ret;
}
static int __devinit pm800_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret = 0;
struct pm80x_chip *chip;
struct pm80x_platform_data *pdata = client->dev.platform_data;
struct pm80x_subchip *subchip;
ret = pm80x_init(client, id);
if (ret) {
dev_err(&client->dev, "pm800_init fail\n");
goto out_init;
}
chip = i2c_get_clientdata(client);
/* init subchip for PM800 */
subchip =
devm_kzalloc(&client->dev, sizeof(struct pm80x_subchip),
GFP_KERNEL);
if (!subchip) {
ret = -ENOMEM;
goto err_subchip_alloc;
}
subchip->power_page_addr = pdata->power_page_addr;
subchip->gpadc_page_addr = pdata->gpadc_page_addr;
chip->subchip = subchip;
ret = device_800_init(chip, pdata);
if (ret) {
dev_err(chip->dev, "%s id 0x%x failed!\n", __func__, chip->id);
goto err_800_init;
}
ret = pm800_pages_init(chip);
if (ret) {
dev_err(&client->dev, "pm800_pages_init failed!\n");
goto err_page_init;
}
if (pdata->plat_config)
pdata->plat_config(chip, pdata);
err_page_init:
mfd_remove_devices(chip->dev);
device_irq_exit_800(chip);
err_800_init:
devm_kfree(&client->dev, subchip);
err_subchip_alloc:
pm80x_deinit(client);
out_init:
return ret;
}
static int __devexit pm800_remove(struct i2c_client *client)
{
struct pm80x_chip *chip = i2c_get_clientdata(client);
mfd_remove_devices(chip->dev);
device_irq_exit_800(chip);
pm800_pages_exit(chip);
devm_kfree(&client->dev, chip->subchip);
pm80x_deinit(client);
return 0;
}
static struct i2c_driver pm800_driver = {
.driver = {
.name = "88PM80X",
.owner = THIS_MODULE,
.pm = &pm80x_pm_ops,
},
.probe = pm800_probe,
.remove = __devexit_p(pm800_remove),
.id_table = pm80x_id_table,
};
static int __init pm800_i2c_init(void)
{
return i2c_add_driver(&pm800_driver);
}
subsys_initcall(pm800_i2c_init);
static void __exit pm800_i2c_exit(void)
{
i2c_del_driver(&pm800_driver);
}
module_exit(pm800_i2c_exit);
MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM800");
MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
MODULE_LICENSE("GPL");
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