OpenCloudOS-Kernel/drivers/mfd/lp8788.c

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// SPDX-License-Identifier: GPL-2.0-only
/*
* TI LP8788 MFD - core interface
*
* Copyright 2012 Texas Instruments
*
* Author: Milo(Woogyom) Kim <milo.kim@ti.com>
*/
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/mfd/core.h>
#include <linux/mfd/lp8788.h>
#include <linux/module.h>
#include <linux/slab.h>
#define MAX_LP8788_REGISTERS 0xA2
#define MFD_DEV_SIMPLE(_name) \
{ \
.name = LP8788_DEV_##_name, \
}
#define MFD_DEV_WITH_ID(_name, _id) \
{ \
.name = LP8788_DEV_##_name, \
.id = _id, \
}
#define MFD_DEV_WITH_RESOURCE(_name, _resource, num_resource) \
{ \
.name = LP8788_DEV_##_name, \
.resources = _resource, \
.num_resources = num_resource, \
}
static const struct resource chg_irqs[] = {
/* Charger Interrupts */
{
.start = LP8788_INT_CHG_INPUT_STATE,
.end = LP8788_INT_PRECHG_TIMEOUT,
.name = LP8788_CHG_IRQ,
.flags = IORESOURCE_IRQ,
},
/* Power Routing Switch Interrupts */
{
.start = LP8788_INT_ENTER_SYS_SUPPORT,
.end = LP8788_INT_EXIT_SYS_SUPPORT,
.name = LP8788_PRSW_IRQ,
.flags = IORESOURCE_IRQ,
},
/* Battery Interrupts */
{
.start = LP8788_INT_BATT_LOW,
.end = LP8788_INT_NO_BATT,
.name = LP8788_BATT_IRQ,
.flags = IORESOURCE_IRQ,
},
};
static const struct resource rtc_irqs[] = {
{
.start = LP8788_INT_RTC_ALARM1,
.end = LP8788_INT_RTC_ALARM2,
.name = LP8788_ALM_IRQ,
.flags = IORESOURCE_IRQ,
},
};
static const struct mfd_cell lp8788_devs[] = {
/* 4 bucks */
MFD_DEV_WITH_ID(BUCK, 1),
MFD_DEV_WITH_ID(BUCK, 2),
MFD_DEV_WITH_ID(BUCK, 3),
MFD_DEV_WITH_ID(BUCK, 4),
/* 12 digital ldos */
MFD_DEV_WITH_ID(DLDO, 1),
MFD_DEV_WITH_ID(DLDO, 2),
MFD_DEV_WITH_ID(DLDO, 3),
MFD_DEV_WITH_ID(DLDO, 4),
MFD_DEV_WITH_ID(DLDO, 5),
MFD_DEV_WITH_ID(DLDO, 6),
MFD_DEV_WITH_ID(DLDO, 7),
MFD_DEV_WITH_ID(DLDO, 8),
MFD_DEV_WITH_ID(DLDO, 9),
MFD_DEV_WITH_ID(DLDO, 10),
MFD_DEV_WITH_ID(DLDO, 11),
MFD_DEV_WITH_ID(DLDO, 12),
/* 10 analog ldos */
MFD_DEV_WITH_ID(ALDO, 1),
MFD_DEV_WITH_ID(ALDO, 2),
MFD_DEV_WITH_ID(ALDO, 3),
MFD_DEV_WITH_ID(ALDO, 4),
MFD_DEV_WITH_ID(ALDO, 5),
MFD_DEV_WITH_ID(ALDO, 6),
MFD_DEV_WITH_ID(ALDO, 7),
MFD_DEV_WITH_ID(ALDO, 8),
MFD_DEV_WITH_ID(ALDO, 9),
MFD_DEV_WITH_ID(ALDO, 10),
/* ADC */
MFD_DEV_SIMPLE(ADC),
/* battery charger */
MFD_DEV_WITH_RESOURCE(CHARGER, chg_irqs, ARRAY_SIZE(chg_irqs)),
/* rtc */
MFD_DEV_WITH_RESOURCE(RTC, rtc_irqs, ARRAY_SIZE(rtc_irqs)),
/* backlight */
MFD_DEV_SIMPLE(BACKLIGHT),
/* current sink for vibrator */
MFD_DEV_SIMPLE(VIBRATOR),
/* current sink for keypad LED */
MFD_DEV_SIMPLE(KEYLED),
};
int lp8788_read_byte(struct lp8788 *lp, u8 reg, u8 *data)
{
int ret;
unsigned int val;
ret = regmap_read(lp->regmap, reg, &val);
if (ret < 0) {
dev_err(lp->dev, "failed to read 0x%.2x\n", reg);
return ret;
}
*data = (u8)val;
return 0;
}
EXPORT_SYMBOL_GPL(lp8788_read_byte);
int lp8788_read_multi_bytes(struct lp8788 *lp, u8 reg, u8 *data, size_t count)
{
return regmap_bulk_read(lp->regmap, reg, data, count);
}
EXPORT_SYMBOL_GPL(lp8788_read_multi_bytes);
int lp8788_write_byte(struct lp8788 *lp, u8 reg, u8 data)
{
return regmap_write(lp->regmap, reg, data);
}
EXPORT_SYMBOL_GPL(lp8788_write_byte);
int lp8788_update_bits(struct lp8788 *lp, u8 reg, u8 mask, u8 data)
{
return regmap_update_bits(lp->regmap, reg, mask, data);
}
EXPORT_SYMBOL_GPL(lp8788_update_bits);
static int lp8788_platform_init(struct lp8788 *lp)
{
struct lp8788_platform_data *pdata = lp->pdata;
return (pdata && pdata->init_func) ? pdata->init_func(lp) : 0;
}
static const struct regmap_config lp8788_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = MAX_LP8788_REGISTERS,
};
static int lp8788_probe(struct i2c_client *cl)
{
struct lp8788 *lp;
struct lp8788_platform_data *pdata = dev_get_platdata(&cl->dev);
int ret;
lp = devm_kzalloc(&cl->dev, sizeof(struct lp8788), GFP_KERNEL);
if (!lp)
return -ENOMEM;
lp->regmap = devm_regmap_init_i2c(cl, &lp8788_regmap_config);
if (IS_ERR(lp->regmap)) {
ret = PTR_ERR(lp->regmap);
dev_err(&cl->dev, "regmap init i2c err: %d\n", ret);
return ret;
}
lp->pdata = pdata;
lp->dev = &cl->dev;
i2c_set_clientdata(cl, lp);
ret = lp8788_platform_init(lp);
if (ret)
return ret;
ret = lp8788_irq_init(lp, cl->irq);
if (ret)
return ret;
ret = mfd_add_devices(lp->dev, -1, lp8788_devs,
ARRAY_SIZE(lp8788_devs), NULL, 0, NULL);
if (ret)
goto err_exit_irq;
return 0;
err_exit_irq:
lp8788_irq_exit(lp);
return ret;
}
i2c: Make remove callback return void The value returned by an i2c driver's remove function is mostly ignored. (Only an error message is printed if the value is non-zero that the error is ignored.) So change the prototype of the remove function to return no value. This way driver authors are not tempted to assume that passing an error to the upper layer is a good idea. All drivers are adapted accordingly. There is no intended change of behaviour, all callbacks were prepared to return 0 before. Reviewed-by: Peter Senna Tschudin <peter.senna@gmail.com> Reviewed-by: Jeremy Kerr <jk@codeconstruct.com.au> Reviewed-by: Benjamin Mugnier <benjamin.mugnier@foss.st.com> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Reviewed-by: Crt Mori <cmo@melexis.com> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Marek Behún <kabel@kernel.org> # for leds-turris-omnia Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Petr Machata <petrm@nvidia.com> # for mlxsw Reviewed-by: Maximilian Luz <luzmaximilian@gmail.com> # for surface3_power Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> # for bmc150-accel-i2c + kxcjk-1013 Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> # for media/* + staging/media/* Acked-by: Miguel Ojeda <ojeda@kernel.org> # for auxdisplay/ht16k33 + auxdisplay/lcd2s Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com> # for versaclock5 Reviewed-by: Ajay Gupta <ajayg@nvidia.com> # for ucsi_ccg Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> # for iio Acked-by: Peter Rosin <peda@axentia.se> # for i2c-mux-*, max9860 Acked-by: Adrien Grassein <adrien.grassein@gmail.com> # for lontium-lt8912b Reviewed-by: Jean Delvare <jdelvare@suse.de> # for hwmon, i2c-core and i2c/muxes Acked-by: Corey Minyard <cminyard@mvista.com> # for IPMI Reviewed-by: Vladimir Oltean <olteanv@gmail.com> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com> # for drivers/power Acked-by: Krzysztof Hałasa <khalasa@piap.pl> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-08-15 16:02:30 +08:00
static void lp8788_remove(struct i2c_client *cl)
{
struct lp8788 *lp = i2c_get_clientdata(cl);
mfd_remove_devices(lp->dev);
lp8788_irq_exit(lp);
}
static const struct i2c_device_id lp8788_ids[] = {
{"lp8788", 0},
{ }
};
MODULE_DEVICE_TABLE(i2c, lp8788_ids);
static struct i2c_driver lp8788_driver = {
.driver = {
.name = "lp8788",
},
.probe = lp8788_probe,
.remove = lp8788_remove,
.id_table = lp8788_ids,
};
static int __init lp8788_init(void)
{
return i2c_add_driver(&lp8788_driver);
}
subsys_initcall(lp8788_init);
static void __exit lp8788_exit(void)
{
i2c_del_driver(&lp8788_driver);
}
module_exit(lp8788_exit);
MODULE_DESCRIPTION("TI LP8788 MFD Driver");
MODULE_AUTHOR("Milo Kim");