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// 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)
{
u8 ipc_out;
int ret;
ret = intel_scu_ipc_ioread8(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)
{
u8 ipc_in = val;
int ret;
ret = intel_scu_ipc_iowrite8(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;
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");
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