linux/drivers/mfd/intel_soc_pmic_mrfld.c
Mika Westerberg 5036208367 mfd: intel_soc_pmic_mrfld: Convert to use new SCU IPC API
This converts the Intel Merrifield PMIC driver over the new SCU IPC API
where the SCU IPC instance is passed to the functions.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-04-24 11:18:03 +01:00

164 lines
3.7 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Device access for Basin Cove PMIC
*
* Copyright (c) 2019, Intel Corporation.
* Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
*/
#include <linux/acpi.h>
#include <linux/interrupt.h>
#include <linux/mfd/core.h>
#include <linux/mfd/intel_soc_pmic.h>
#include <linux/mfd/intel_soc_pmic_mrfld.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <asm/intel_scu_ipc.h>
/*
* Level 2 IRQs
*
* Firmware on the systems with Basin Cove PMIC services Level 1 IRQs
* without an assistance. Thus, each of the Level 1 IRQ is represented
* as a separate RTE in IOAPIC.
*/
static struct resource irq_level2_resources[] = {
DEFINE_RES_IRQ(0), /* power button */
DEFINE_RES_IRQ(0), /* TMU */
DEFINE_RES_IRQ(0), /* thermal */
DEFINE_RES_IRQ(0), /* BCU */
DEFINE_RES_IRQ(0), /* ADC */
DEFINE_RES_IRQ(0), /* charger */
DEFINE_RES_IRQ(0), /* GPIO */
};
static const struct mfd_cell bcove_dev[] = {
{
.name = "mrfld_bcove_pwrbtn",
.num_resources = 1,
.resources = &irq_level2_resources[0],
}, {
.name = "mrfld_bcove_tmu",
.num_resources = 1,
.resources = &irq_level2_resources[1],
}, {
.name = "mrfld_bcove_thermal",
.num_resources = 1,
.resources = &irq_level2_resources[2],
}, {
.name = "mrfld_bcove_bcu",
.num_resources = 1,
.resources = &irq_level2_resources[3],
}, {
.name = "mrfld_bcove_adc",
.num_resources = 1,
.resources = &irq_level2_resources[4],
}, {
.name = "mrfld_bcove_charger",
.num_resources = 1,
.resources = &irq_level2_resources[5],
}, {
.name = "mrfld_bcove_pwrsrc",
.num_resources = 1,
.resources = &irq_level2_resources[5],
}, {
.name = "mrfld_bcove_gpio",
.num_resources = 1,
.resources = &irq_level2_resources[6],
},
{ .name = "mrfld_bcove_region", },
};
static int bcove_ipc_byte_reg_read(void *context, unsigned int reg,
unsigned int *val)
{
struct intel_soc_pmic *pmic = context;
u8 ipc_out;
int ret;
ret = intel_scu_ipc_dev_ioread8(pmic->scu, reg, &ipc_out);
if (ret)
return ret;
*val = ipc_out;
return 0;
}
static int bcove_ipc_byte_reg_write(void *context, unsigned int reg,
unsigned int val)
{
struct intel_soc_pmic *pmic = context;
u8 ipc_in = val;
int ret;
ret = intel_scu_ipc_dev_iowrite8(pmic->scu, reg, ipc_in);
if (ret)
return ret;
return 0;
}
static const struct regmap_config bcove_regmap_config = {
.reg_bits = 16,
.val_bits = 8,
.max_register = 0xff,
.reg_write = bcove_ipc_byte_reg_write,
.reg_read = bcove_ipc_byte_reg_read,
};
static int bcove_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct intel_soc_pmic *pmic;
unsigned int i;
int ret;
pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
if (!pmic)
return -ENOMEM;
pmic->scu = devm_intel_scu_ipc_dev_get(dev);
if (!pmic->scu)
return -ENOMEM;
platform_set_drvdata(pdev, pmic);
pmic->dev = &pdev->dev;
pmic->regmap = devm_regmap_init(dev, NULL, pmic, &bcove_regmap_config);
if (IS_ERR(pmic->regmap))
return PTR_ERR(pmic->regmap);
for (i = 0; i < ARRAY_SIZE(irq_level2_resources); i++) {
ret = platform_get_irq(pdev, i);
if (ret < 0)
return ret;
irq_level2_resources[i].start = ret;
irq_level2_resources[i].end = ret;
}
return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
bcove_dev, ARRAY_SIZE(bcove_dev),
NULL, 0, NULL);
}
static const struct acpi_device_id bcove_acpi_ids[] = {
{ "INTC100E" },
{}
};
MODULE_DEVICE_TABLE(acpi, bcove_acpi_ids);
static struct platform_driver bcove_driver = {
.driver = {
.name = "intel_soc_pmic_mrfld",
.acpi_match_table = bcove_acpi_ids,
},
.probe = bcove_probe,
};
module_platform_driver(bcove_driver);
MODULE_DESCRIPTION("IPC driver for Intel SoC Basin Cove PMIC");
MODULE_LICENSE("GPL v2");