1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Intel Cherry Trail Crystal Cove PMIC operation region driver
4  *
5  * Copyright (C) 2019 Hans de Goede <hdegoede@redhat.com>
6  */
7 
8 #include <linux/acpi.h>
9 #include <linux/init.h>
10 #include <linux/mfd/intel_soc_pmic.h>
11 #include <linux/platform_device.h>
12 #include <linux/regmap.h>
13 #include "intel_pmic.h"
14 
15 /*
16  * We have no docs for the CHT Crystal Cove PMIC. The Asus Zenfone-2 kernel
17  * code has 2 Crystal Cove regulator drivers, one calls the PMIC a "Crystal
18  * Cove Plus" PMIC and talks about Cherry Trail, so presumably that one
19  * could be used to get register info for the regulators if we need to
20  * implement regulator support in the future.
21  *
22  * For now the sole purpose of this driver is to make
23  * intel_soc_pmic_exec_mipi_pmic_seq_element work on devices with a
24  * CHT Crystal Cove PMIC.
25  */
26 static const struct intel_pmic_opregion_data intel_chtcrc_pmic_opregion_data = {
27 	.pmic_i2c_address = 0x6e,
28 };
29 
30 static int intel_chtcrc_pmic_opregion_probe(struct platform_device *pdev)
31 {
32 	struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
33 	return intel_pmic_install_opregion_handler(&pdev->dev,
34 			ACPI_HANDLE(pdev->dev.parent), pmic->regmap,
35 			&intel_chtcrc_pmic_opregion_data);
36 }
37 
38 static struct platform_driver intel_chtcrc_pmic_opregion_driver = {
39 	.probe = intel_chtcrc_pmic_opregion_probe,
40 	.driver = {
41 		.name = "cht_crystal_cove_pmic",
42 	},
43 };
44 builtin_platform_driver(intel_chtcrc_pmic_opregion_driver);
45