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// SPDX-License-Identifier: GPL-2.0-only OR MIT
/*
* Apple SPMI NVMEM driver
*
* Copyright The Asahi Linux Contributors
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/nvmem-provider.h>
#include <linux/of.h>
#include <linux/spmi.h>
#include <linux/regmap.h>
static const struct regmap_config apple_spmi_regmap_config = {
.reg_bits = 16,
.val_bits = 8,
.max_register = 0xffff,
};
static int apple_spmi_nvmem_probe(struct spmi_device *sdev)
{
struct regmap *regmap;
struct nvmem_config nvmem_cfg = {
.dev = &sdev->dev,
.name = "spmi_nvmem",
.id = NVMEM_DEVID_AUTO,
.word_size = 1,
.stride = 1,
.size = 0xffff,
.reg_read = (void *)regmap_bulk_read,
.reg_write = (void *)regmap_bulk_write,
};
regmap = devm_regmap_init_spmi_ext(sdev, &apple_spmi_regmap_config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
nvmem_cfg.priv = regmap;
return PTR_ERR_OR_ZERO(devm_nvmem_register(&sdev->dev, &nvmem_cfg));
}
static const struct of_device_id apple_spmi_nvmem_id_table[] = {
{ .compatible = "apple,spmi-nvmem" },
{ },
};
MODULE_DEVICE_TABLE(of, apple_spmi_nvmem_id_table);
static struct spmi_driver apple_spmi_nvmem_driver = {
.probe = apple_spmi_nvmem_probe,
.driver = {
.name = "apple-spmi-nvmem",
.of_match_table = apple_spmi_nvmem_id_table,
},
};
module_spmi_driver(apple_spmi_nvmem_driver);
MODULE_LICENSE("Dual MIT/GPL");
MODULE_AUTHOR("Hector Martin <marcan@marcan.st>");
MODULE_DESCRIPTION("Apple SPMI NVMEM driver");
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