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fe91c24a55
Add a driver for a series of SPMI-attached PMICs present on Apple devices Reviewed-by: Neal Gompa <neal@gompa.dev> Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io> Signed-off-by: Hector Martin <marcan@marcan.st> Co-developed-by: Sasha Finkelstein <fnkl.kernel@gmail.com> Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com> Signed-off-by: Srinivas Kandagatla <srini@kernel.org> Link: https://lore.kernel.org/r/20250509122452.11827-4-srini@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only OR MIT
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/*
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* Apple SPMI NVMEM driver
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*
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* Copyright The Asahi Linux Contributors
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/nvmem-provider.h>
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#include <linux/of.h>
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#include <linux/spmi.h>
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#include <linux/regmap.h>
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static const struct regmap_config apple_spmi_regmap_config = {
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.reg_bits = 16,
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.val_bits = 8,
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.max_register = 0xffff,
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};
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static int apple_spmi_nvmem_probe(struct spmi_device *sdev)
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{
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struct regmap *regmap;
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struct nvmem_config nvmem_cfg = {
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.dev = &sdev->dev,
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.name = "spmi_nvmem",
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.id = NVMEM_DEVID_AUTO,
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.word_size = 1,
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.stride = 1,
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.size = 0xffff,
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.reg_read = (void *)regmap_bulk_read,
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.reg_write = (void *)regmap_bulk_write,
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};
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regmap = devm_regmap_init_spmi_ext(sdev, &apple_spmi_regmap_config);
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if (IS_ERR(regmap))
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return PTR_ERR(regmap);
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nvmem_cfg.priv = regmap;
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return PTR_ERR_OR_ZERO(devm_nvmem_register(&sdev->dev, &nvmem_cfg));
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}
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static const struct of_device_id apple_spmi_nvmem_id_table[] = {
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{ .compatible = "apple,spmi-nvmem" },
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{ },
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};
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MODULE_DEVICE_TABLE(of, apple_spmi_nvmem_id_table);
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static struct spmi_driver apple_spmi_nvmem_driver = {
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.probe = apple_spmi_nvmem_probe,
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.driver = {
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.name = "apple-spmi-nvmem",
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.of_match_table = apple_spmi_nvmem_id_table,
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},
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};
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module_spmi_driver(apple_spmi_nvmem_driver);
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MODULE_LICENSE("Dual MIT/GPL");
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MODULE_AUTHOR("Hector Martin <marcan@marcan.st>");
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MODULE_DESCRIPTION("Apple SPMI NVMEM driver");
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