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134 lines
3.9 KiB
Diff
134 lines
3.9 KiB
Diff
From 8d26f74c3cfe2457f40536a541a864e8567a9207 Mon Sep 17 00:00:00 2001
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From: Hector Martin <marcan@marcan.st>
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Date: Tue, 15 Feb 2022 18:43:17 +0900
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Subject: [PATCH 153/171] mfd: Add a simple-mfd-spmi driver
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This is the SPMI counterpart to simple-mfd-i2c. It merely exposes the
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SPMI register address space as an MFD device, such that different
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aspects of a device can be managed by separate drivers.
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Signed-off-by: Hector Martin <marcan@marcan.st>
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---
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drivers/mfd/Kconfig | 28 ++++++++++++++++++++
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drivers/mfd/Makefile | 1 +
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drivers/mfd/simple-mfd-spmi.c | 49 +++++++++++++++++++++++++++++++++++
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3 files changed, 78 insertions(+)
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create mode 100644 drivers/mfd/simple-mfd-spmi.c
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diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
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index 3b59456f5545..e675aaf00bc8 100644
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--- a/drivers/mfd/Kconfig
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+++ b/drivers/mfd/Kconfig
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@@ -51,6 +51,21 @@ config MFD_ACT8945A
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linear regulators, along with a complete ActivePath battery
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charger.
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+config MFD_APPLE_SPMI_PMU
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+ tristate "Apple SPMI PMUs"
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+ depends on SPMI
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+ depends on ARCH_APPLE || COMPILE_TEST
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+ default ARCH_APPLE
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+ select MFD_SIMPLE_MFD_SPMI
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+ help
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+ Say yes here to enable support for Apple PMUs attached via the
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+ SPMI bus. These can be found on Apple devices such as Apple
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+ Silicon Macs.
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+
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+ This driver itself only attaches to the core device, and relies
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+ on subsystem drivers for individual device functions. You must
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+ enable those for it to be useful.
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+
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config MFD_SUN4I_GPADC
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tristate "Allwinner sunxi platforms' GPADC MFD driver"
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select MFD_CORE
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@@ -1214,6 +1229,19 @@ config MFD_SIMPLE_MFD_I2C
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sub-devices represented by child nodes in Device Tree will be
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subsequently registered.
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+config MFD_SIMPLE_MFD_SPMI
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+ tristate
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+ depends on SPMI
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+ select MFD_CORE
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+ select REGMAP_SPMI
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+ help
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+ This driver creates a single register map with the intention for it
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+ to be shared by all sub-devices.
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+
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+ Once the register map has been successfully initialised, any
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+ sub-devices represented by child nodes in Device Tree will be
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+ subsequently registered.
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+
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config MFD_SL28CPLD
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tristate "Kontron sl28cpld Board Management Controller"
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depends on I2C
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diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
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index 858cacf659d6..8d8abcd68351 100644
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--- a/drivers/mfd/Makefile
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+++ b/drivers/mfd/Makefile
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@@ -266,6 +266,7 @@ obj-$(CONFIG_MFD_QCOM_PM8008) += qcom-pm8008.o
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obj-$(CONFIG_SGI_MFD_IOC3) += ioc3.o
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obj-$(CONFIG_MFD_SIMPLE_MFD_I2C) += simple-mfd-i2c.o
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+obj-$(CONFIG_MFD_SIMPLE_MFD_SPMI) += simple-mfd-spmi.o
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obj-$(CONFIG_MFD_INTEL_M10_BMC) += intel-m10-bmc.o
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obj-$(CONFIG_MFD_ATC260X) += atc260x-core.o
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diff --git a/drivers/mfd/simple-mfd-spmi.c b/drivers/mfd/simple-mfd-spmi.c
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new file mode 100644
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index 000000000000..99f25751000a
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--- /dev/null
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+++ b/drivers/mfd/simple-mfd-spmi.c
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@@ -0,0 +1,49 @@
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+// SPDX-License-Identifier: GPL-2.0-only OR MIT
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+/*
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+ * Simple MFD - SPMI
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+ *
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+ * Copyright The Asahi Linux Contributors
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+ */
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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/regmap.h>
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+#include <linux/spmi.h>
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+#include <linux/of_platform.h>
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+
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+static const struct regmap_config 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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+
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+static int simple_spmi_probe(struct spmi_device *sdev)
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+{
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+ struct regmap *regmap;
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+
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+ regmap = devm_regmap_init_spmi_ext(sdev, &spmi_regmap_config);
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+ if (IS_ERR(regmap))
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+ return PTR_ERR(regmap);
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+
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+ return devm_of_platform_populate(&sdev->dev);
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+}
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+
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+static const struct of_device_id simple_spmi_id_table[] = {
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+ { .compatible = "apple,spmi-pmu" },
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+ {}
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+};
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+MODULE_DEVICE_TABLE(of, simple_spmi_id_table);
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+
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+static struct spmi_driver pmic_spmi_driver = {
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+ .probe = simple_spmi_probe,
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+ .driver = {
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+ .name = "simple-mfd-spmi",
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+ .owner = THIS_MODULE,
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+ .of_match_table = simple_spmi_id_table,
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+ },
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+};
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+module_spmi_driver(pmic_spmi_driver);
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+
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+MODULE_LICENSE("Dual MIT/GPL");
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+MODULE_DESCRIPTION("Simple MFD - SPMI driver");
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+MODULE_AUTHOR("Hector Martin <marcan@marcan.st>");
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--
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2.34.1
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