mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 02:39:48 +00:00
![Sebastian Reichel](/assets/img/avatar_default.png)
Add support for the audio-codec node by converting from devm_of_platform_populate() to devm_mfd_add_devices(). Tested-by: Pavel Machek <pavel@ucw.cz> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk> Signed-off-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Lee Jones <lee.jones@linaro.org>
327 lines
7.7 KiB
C
327 lines
7.7 KiB
C
/*
|
|
* Motorola CPCAP PMIC core driver
|
|
*
|
|
* Copyright (C) 2016 Tony Lindgren <tony@atomide.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/err.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/sysfs.h>
|
|
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/mfd/motorola-cpcap.h>
|
|
#include <linux/spi/spi.h>
|
|
|
|
#define CPCAP_NR_IRQ_REG_BANKS 6
|
|
#define CPCAP_NR_IRQ_CHIPS 3
|
|
#define CPCAP_REGISTER_SIZE 4
|
|
#define CPCAP_REGISTER_BITS 16
|
|
|
|
struct cpcap_ddata {
|
|
struct spi_device *spi;
|
|
struct regmap_irq *irqs;
|
|
struct regmap_irq_chip_data *irqdata[CPCAP_NR_IRQ_CHIPS];
|
|
const struct regmap_config *regmap_conf;
|
|
struct regmap *regmap;
|
|
};
|
|
|
|
static int cpcap_sense_irq(struct regmap *regmap, int irq)
|
|
{
|
|
int regnum = irq / CPCAP_REGISTER_BITS;
|
|
int mask = BIT(irq % CPCAP_REGISTER_BITS);
|
|
int reg = CPCAP_REG_INTS1 + (regnum * CPCAP_REGISTER_SIZE);
|
|
int err, val;
|
|
|
|
if (reg < CPCAP_REG_INTS1 || reg > CPCAP_REG_INTS4)
|
|
return -EINVAL;
|
|
|
|
err = regmap_read(regmap, reg, &val);
|
|
if (err)
|
|
return err;
|
|
|
|
return !!(val & mask);
|
|
}
|
|
|
|
int cpcap_sense_virq(struct regmap *regmap, int virq)
|
|
{
|
|
struct regmap_irq_chip_data *d = irq_get_chip_data(virq);
|
|
int irq_base = regmap_irq_chip_get_base(d);
|
|
|
|
return cpcap_sense_irq(regmap, virq - irq_base);
|
|
}
|
|
EXPORT_SYMBOL_GPL(cpcap_sense_virq);
|
|
|
|
static int cpcap_check_revision(struct cpcap_ddata *cpcap)
|
|
{
|
|
u16 vendor, rev;
|
|
int ret;
|
|
|
|
ret = cpcap_get_vendor(&cpcap->spi->dev, cpcap->regmap, &vendor);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = cpcap_get_revision(&cpcap->spi->dev, cpcap->regmap, &rev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
dev_info(&cpcap->spi->dev, "CPCAP vendor: %s rev: %i.%i (%x)\n",
|
|
vendor == CPCAP_VENDOR_ST ? "ST" : "TI",
|
|
CPCAP_REVISION_MAJOR(rev), CPCAP_REVISION_MINOR(rev),
|
|
rev);
|
|
|
|
if (rev < CPCAP_REVISION_2_1) {
|
|
dev_info(&cpcap->spi->dev,
|
|
"Please add old CPCAP revision support as needed\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* First two irq chips are the two private macro interrupt chips, the third
|
|
* irq chip is for register banks 1 - 4 and is available for drivers to use.
|
|
*/
|
|
static struct regmap_irq_chip cpcap_irq_chip[CPCAP_NR_IRQ_CHIPS] = {
|
|
{
|
|
.name = "cpcap-m2",
|
|
.num_regs = 1,
|
|
.status_base = CPCAP_REG_MI1,
|
|
.ack_base = CPCAP_REG_MI1,
|
|
.mask_base = CPCAP_REG_MIM1,
|
|
.use_ack = true,
|
|
.ack_invert = true,
|
|
},
|
|
{
|
|
.name = "cpcap-m2",
|
|
.num_regs = 1,
|
|
.status_base = CPCAP_REG_MI2,
|
|
.ack_base = CPCAP_REG_MI2,
|
|
.mask_base = CPCAP_REG_MIM2,
|
|
.use_ack = true,
|
|
.ack_invert = true,
|
|
},
|
|
{
|
|
.name = "cpcap1-4",
|
|
.num_regs = 4,
|
|
.status_base = CPCAP_REG_INT1,
|
|
.ack_base = CPCAP_REG_INT1,
|
|
.mask_base = CPCAP_REG_INTM1,
|
|
.use_ack = true,
|
|
.ack_invert = true,
|
|
},
|
|
};
|
|
|
|
static void cpcap_init_one_regmap_irq(struct cpcap_ddata *cpcap,
|
|
struct regmap_irq *rirq,
|
|
int irq_base, int irq)
|
|
{
|
|
unsigned int reg_offset;
|
|
unsigned int bit, mask;
|
|
|
|
reg_offset = irq - irq_base;
|
|
reg_offset /= cpcap->regmap_conf->val_bits;
|
|
reg_offset *= cpcap->regmap_conf->reg_stride;
|
|
|
|
bit = irq % cpcap->regmap_conf->val_bits;
|
|
mask = (1 << bit);
|
|
|
|
rirq->reg_offset = reg_offset;
|
|
rirq->mask = mask;
|
|
}
|
|
|
|
static int cpcap_init_irq_chip(struct cpcap_ddata *cpcap, int irq_chip,
|
|
int irq_start, int nr_irqs)
|
|
{
|
|
struct regmap_irq_chip *chip = &cpcap_irq_chip[irq_chip];
|
|
int i, ret;
|
|
|
|
for (i = irq_start; i < irq_start + nr_irqs; i++) {
|
|
struct regmap_irq *rirq = &cpcap->irqs[i];
|
|
|
|
cpcap_init_one_regmap_irq(cpcap, rirq, irq_start, i);
|
|
}
|
|
chip->irqs = &cpcap->irqs[irq_start];
|
|
chip->num_irqs = nr_irqs;
|
|
chip->irq_drv_data = cpcap;
|
|
|
|
ret = devm_regmap_add_irq_chip(&cpcap->spi->dev, cpcap->regmap,
|
|
cpcap->spi->irq,
|
|
irq_get_trigger_type(cpcap->spi->irq) |
|
|
IRQF_SHARED, -1,
|
|
chip, &cpcap->irqdata[irq_chip]);
|
|
if (ret) {
|
|
dev_err(&cpcap->spi->dev, "could not add irq chip %i: %i\n",
|
|
irq_chip, ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cpcap_init_irq(struct cpcap_ddata *cpcap)
|
|
{
|
|
int ret;
|
|
|
|
cpcap->irqs = devm_kzalloc(&cpcap->spi->dev,
|
|
array3_size(sizeof(*cpcap->irqs),
|
|
CPCAP_NR_IRQ_REG_BANKS,
|
|
cpcap->regmap_conf->val_bits),
|
|
GFP_KERNEL);
|
|
if (!cpcap->irqs)
|
|
return -ENOMEM;
|
|
|
|
ret = cpcap_init_irq_chip(cpcap, 0, 0, 16);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = cpcap_init_irq_chip(cpcap, 1, 16, 16);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = cpcap_init_irq_chip(cpcap, 2, 32, 64);
|
|
if (ret)
|
|
return ret;
|
|
|
|
enable_irq_wake(cpcap->spi->irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id cpcap_of_match[] = {
|
|
{ .compatible = "motorola,cpcap", },
|
|
{ .compatible = "st,6556002", },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, cpcap_of_match);
|
|
|
|
static const struct regmap_config cpcap_regmap_config = {
|
|
.reg_bits = 16,
|
|
.reg_stride = 4,
|
|
.pad_bits = 0,
|
|
.val_bits = 16,
|
|
.write_flag_mask = 0x8000,
|
|
.max_register = CPCAP_REG_ST_TEST2,
|
|
.cache_type = REGCACHE_NONE,
|
|
.reg_format_endian = REGMAP_ENDIAN_LITTLE,
|
|
.val_format_endian = REGMAP_ENDIAN_LITTLE,
|
|
};
|
|
|
|
static const struct mfd_cell cpcap_mfd_devices[] = {
|
|
{
|
|
.name = "cpcap_adc",
|
|
.of_compatible = "motorola,mapphone-cpcap-adc",
|
|
}, {
|
|
.name = "cpcap_battery",
|
|
.of_compatible = "motorola,cpcap-battery",
|
|
}, {
|
|
.name = "cpcap-charger",
|
|
.of_compatible = "motorola,mapphone-cpcap-charger",
|
|
}, {
|
|
.name = "cpcap-regulator",
|
|
.of_compatible = "motorola,mapphone-cpcap-regulator",
|
|
}, {
|
|
.name = "cpcap-rtc",
|
|
.of_compatible = "motorola,cpcap-rtc",
|
|
}, {
|
|
.name = "cpcap-pwrbutton",
|
|
.of_compatible = "motorola,cpcap-pwrbutton",
|
|
}, {
|
|
.name = "cpcap-usb-phy",
|
|
.of_compatible = "motorola,mapphone-cpcap-usb-phy",
|
|
}, {
|
|
.name = "cpcap-led",
|
|
.id = 0,
|
|
.of_compatible = "motorola,cpcap-led-red",
|
|
}, {
|
|
.name = "cpcap-led",
|
|
.id = 1,
|
|
.of_compatible = "motorola,cpcap-led-green",
|
|
}, {
|
|
.name = "cpcap-led",
|
|
.id = 2,
|
|
.of_compatible = "motorola,cpcap-led-blue",
|
|
}, {
|
|
.name = "cpcap-led",
|
|
.id = 3,
|
|
.of_compatible = "motorola,cpcap-led-adl",
|
|
}, {
|
|
.name = "cpcap-led",
|
|
.id = 4,
|
|
.of_compatible = "motorola,cpcap-led-cp",
|
|
}, {
|
|
.name = "cpcap-codec",
|
|
}
|
|
};
|
|
|
|
static int cpcap_probe(struct spi_device *spi)
|
|
{
|
|
const struct of_device_id *match;
|
|
struct cpcap_ddata *cpcap;
|
|
int ret;
|
|
|
|
match = of_match_device(of_match_ptr(cpcap_of_match), &spi->dev);
|
|
if (!match)
|
|
return -ENODEV;
|
|
|
|
cpcap = devm_kzalloc(&spi->dev, sizeof(*cpcap), GFP_KERNEL);
|
|
if (!cpcap)
|
|
return -ENOMEM;
|
|
|
|
cpcap->spi = spi;
|
|
spi_set_drvdata(spi, cpcap);
|
|
|
|
spi->bits_per_word = 16;
|
|
spi->mode = SPI_MODE_0 | SPI_CS_HIGH;
|
|
|
|
ret = spi_setup(spi);
|
|
if (ret)
|
|
return ret;
|
|
|
|
cpcap->regmap_conf = &cpcap_regmap_config;
|
|
cpcap->regmap = devm_regmap_init_spi(spi, &cpcap_regmap_config);
|
|
if (IS_ERR(cpcap->regmap)) {
|
|
ret = PTR_ERR(cpcap->regmap);
|
|
dev_err(&cpcap->spi->dev, "Failed to initialize regmap: %d\n",
|
|
ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
ret = cpcap_check_revision(cpcap);
|
|
if (ret) {
|
|
dev_err(&cpcap->spi->dev, "Failed to detect CPCAP: %i\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = cpcap_init_irq(cpcap);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return devm_mfd_add_devices(&spi->dev, 0, cpcap_mfd_devices,
|
|
ARRAY_SIZE(cpcap_mfd_devices), NULL, 0, NULL);
|
|
}
|
|
|
|
static struct spi_driver cpcap_driver = {
|
|
.driver = {
|
|
.name = "cpcap-core",
|
|
.of_match_table = cpcap_of_match,
|
|
},
|
|
.probe = cpcap_probe,
|
|
};
|
|
module_spi_driver(cpcap_driver);
|
|
|
|
MODULE_ALIAS("platform:cpcap");
|
|
MODULE_DESCRIPTION("CPCAP driver");
|
|
MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
|
|
MODULE_LICENSE("GPL v2");
|