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 .lpat_raw_to_temp = acpi_lpat_raw_to_temp,
28 .pmic_i2c_address = 0x6e,
29 };
30
intel_chtcrc_pmic_opregion_probe(struct platform_device * pdev)31 static int intel_chtcrc_pmic_opregion_probe(struct platform_device *pdev)
32 {
33 struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
34 return intel_pmic_install_opregion_handler(&pdev->dev,
35 ACPI_HANDLE(pdev->dev.parent), pmic->regmap,
36 &intel_chtcrc_pmic_opregion_data);
37 }
38
39 static struct platform_driver intel_chtcrc_pmic_opregion_driver = {
40 .probe = intel_chtcrc_pmic_opregion_probe,
41 .driver = {
42 .name = "cht_crystal_cove_pmic",
43 },
44 };
45 builtin_platform_driver(intel_chtcrc_pmic_opregion_driver);
46