[PATCH v3 0/5] mfd: Add support for Khadas Microcontroller

[PATCH v3 0/5] mfd: Add support for Khadas Microcontroller

[Neil Armstrong]

The new Khadas VIM2, VIM3 and Edge boards embeds an on-board microcontroller
connected via I2C.

This Microcontroller is present on the Khadas VIM1, VIM2, VIM3 and Edge
boards.

It has multiple boot control features like password check, power-on
options, power-off control and system FAN control on recent boards.

Thie serie adds :
- the bindings
- the MFD driver
- the Thermal Cooling cell driver
- updates MAINTAINERS
- add support into the Khadas VIM3/VIM3L DT

Changes since v2 at [3]:
- Removed NVMEM driver for separate submission
- fixed MFD driver, header and Kconfig
- fixed Thermal Kconfig
- fixed MAINTAINERS files and path

Changes since RFC v1 at [2]:
- moved hwmon driver to thermal-only
- moved the SM1 thermal nodes in a separate serie
- added the bindings review tag from rob

[1] http://lore.kernel.org/r/20200512093916.19676-1-narmstrong@baylibre.com
[2] http://lore.kernel.org/r/20200421080102.22796-1-narmstrong@baylibre.com
[3] http://lore.kernel.org/r/20200512132613.31507-1-narmstrong@baylibre.com

Neil Armstrong (5):
  dt-bindings: mfd: add Khadas Microcontroller bindings
  mfd: add support for the Khadas System control Microcontroller
  thermal: add support for the MCU controlled FAN on Khadas boards
  MAINTAINERS: add myself as maintainer for Khadas MCU drivers
  arm64: dts: meson-khadas-vim3: add Khadas MCU nodes

 .../devicetree/bindings/mfd/khadas,mcu.yaml   |  44 +++++
 MAINTAINERS                                   |   9 +
 .../boot/dts/amlogic/meson-khadas-vim3.dtsi   |  23 +++
 drivers/mfd/Kconfig                           |  21 +++
 drivers/mfd/Makefile                          |   1 +
 drivers/mfd/khadas-mcu.c                      | 142 ++++++++++++++
 drivers/thermal/Kconfig                       |  11 ++
 drivers/thermal/Makefile                      |   1 +
 drivers/thermal/khadas_mcu_fan.c              | 174 ++++++++++++++++++
 include/linux/mfd/khadas-mcu.h                |  91 +++++++++
 10 files changed, 517 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
 create mode 100644 drivers/mfd/khadas-mcu.c
 create mode 100644 drivers/thermal/khadas_mcu_fan.c
 create mode 100644 include/linux/mfd/khadas-mcu.h

-- 
2.22.0


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[PATCH v3 1/5] dt-bindings: mfd: add Khadas Microcontroller bindings

[Neil Armstrong]

This Microcontroller is present on the Khadas VIM1, VIM2, VIM3 and Edge
boards.

It has multiple boot control features like password check, power-on
options, power-off control and system FAN control on recent boards.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 .../devicetree/bindings/mfd/khadas,mcu.yaml   | 44 +++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/khadas,mcu.yaml

diff --git a/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml b/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
new file mode 100644
index 000000000000..a3b976f101e8
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/khadas,mcu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Khadas on-board Microcontroller Device Tree Bindings
+
+maintainers:
+  - Neil Armstrong <narmstrong@baylibre.com>
+
+description: |
+  Khadas embeds a microcontroller on their VIM and Edge boards adding some
+  system feature as PWM Fan control (for VIM2 rev14 or VIM3), User memory
+  storage, IR/Key resume control, system power LED control and more.
+
+properties:
+  compatible:
+    enum:
+      - khadas,mcu # MCU revision is discoverable
+
+  "#cooling-cells": # Only needed for boards having FAN control feature
+    const: 2
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      khadas_mcu: system-controller@18 {
+        compatible = "khadas,mcu";
+        reg = <0x18>;
+        #cooling-cells = <2>;
+      };
+    };
-- 
2.22.0


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[PATCH v3 2/5] mfd: add support for the Khadas System control Microcontroller

[Neil Armstrong]

This Microcontroller is present on the Khadas VIM1, VIM2, VIM3 and Edge
boards.

It has multiple boot control features like password check, power-on
options, power-off control and system FAN control on recent boards.

This implements a very basic MFD driver with the fan control and User
NVMEM cells.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 drivers/mfd/Kconfig            |  21 +++++
 drivers/mfd/Makefile           |   1 +
 drivers/mfd/khadas-mcu.c       | 142 +++++++++++++++++++++++++++++++++
 include/linux/mfd/khadas-mcu.h |  91 +++++++++++++++++++++
 4 files changed, 255 insertions(+)
 create mode 100644 drivers/mfd/khadas-mcu.c
 create mode 100644 include/linux/mfd/khadas-mcu.h

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 0a59249198d3..61ffade36363 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -2003,6 +2003,27 @@ config MFD_WCD934X
 	  This driver provides common support WCD934x audio codec and its
 	  associated Pin Controller, Soundwire Controller and Audio codec.
 
+config MFD_KHADAS_MCU
+	tristate "Support for Khadas System control Microcontroller"
+	depends on I2C
+	depends on ARCH_MESON || ARCH_ROCKCHIP || COMPILE_TEST
+	select MFD_CORE
+	select REGMAP_I2C
+	help
+	  Support for the Khadas System control Microcontroller interface
+	  present on their VIM and Edge boards.
+
+	  This Microcontroller is present on the Khadas VIM1, VIM2, VIM3 and
+	  Edge boards.
+
+	  It provides multiple boot control features like password check,
+	  power-on options, power-off control and system FAN control on recent
+	  boards.
+
+	  This driver provides common support for accessing the device,
+	  additional drivers must be enabled in order to use the functionality
+	  of the device.
+
 menu "Multimedia Capabilities Port drivers"
 	depends on ARCH_SA1100
 
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index f935d10cbf0f..0f1633b096bb 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -257,5 +257,6 @@ obj-$(CONFIG_MFD_ROHM_BD70528)	+= rohm-bd70528.o
 obj-$(CONFIG_MFD_ROHM_BD71828)	+= rohm-bd71828.o
 obj-$(CONFIG_MFD_ROHM_BD718XX)	+= rohm-bd718x7.o
 obj-$(CONFIG_MFD_STMFX) 	+= stmfx.o
+obj-$(CONFIG_MFD_KHADAS_MCU) 	+= khadas-mcu.o
 
 obj-$(CONFIG_SGI_MFD_IOC3)	+= ioc3.o
diff --git a/drivers/mfd/khadas-mcu.c b/drivers/mfd/khadas-mcu.c
new file mode 100644
index 000000000000..44d5bb462dab
--- /dev/null
+++ b/drivers/mfd/khadas-mcu.c
@@ -0,0 +1,142 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for Khadas System control Microcontroller
+ *
+ * Copyright (C) 2020 BayLibre SAS
+ *
+ * Author(s): Neil Armstrong <narmstrong@baylibre.com>
+ */
+#include <linux/bitfield.h>
+#include <linux/i2c.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/khadas-mcu.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+static bool khadas_mcu_reg_volatile(struct device *dev, unsigned int reg)
+{
+	if (reg >= KHADAS_MCU_USER_DATA_0_REG &&
+	    reg < KHADAS_MCU_PWR_OFF_CMD_REG)
+		return true;
+
+	switch (reg) {
+	case KHADAS_MCU_PWR_OFF_CMD_REG:
+	case KHADAS_MCU_PASSWD_START_REG:
+	case KHADAS_MCU_CHECK_VEN_PASSWD_REG:
+	case KHADAS_MCU_CHECK_USER_PASSWD_REG:
+	case KHADAS_MCU_WOL_INIT_START_REG:
+	case KHADAS_MCU_CMD_FAN_STATUS_CTRL_REG:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool khadas_mcu_reg_writeable(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case KHADAS_MCU_PASSWD_VEN_0_REG:
+	case KHADAS_MCU_PASSWD_VEN_1_REG:
+	case KHADAS_MCU_PASSWD_VEN_2_REG:
+	case KHADAS_MCU_PASSWD_VEN_3_REG:
+	case KHADAS_MCU_PASSWD_VEN_4_REG:
+	case KHADAS_MCU_PASSWD_VEN_5_REG:
+	case KHADAS_MCU_MAC_0_REG:
+	case KHADAS_MCU_MAC_1_REG:
+	case KHADAS_MCU_MAC_2_REG:
+	case KHADAS_MCU_MAC_3_REG:
+	case KHADAS_MCU_MAC_4_REG:
+	case KHADAS_MCU_MAC_5_REG:
+	case KHADAS_MCU_USID_0_REG:
+	case KHADAS_MCU_USID_1_REG:
+	case KHADAS_MCU_USID_2_REG:
+	case KHADAS_MCU_USID_3_REG:
+	case KHADAS_MCU_USID_4_REG:
+	case KHADAS_MCU_USID_5_REG:
+	case KHADAS_MCU_VERSION_0_REG:
+	case KHADAS_MCU_VERSION_1_REG:
+	case KHADAS_MCU_DEVICE_NO_0_REG:
+	case KHADAS_MCU_DEVICE_NO_1_REG:
+	case KHADAS_MCU_FACTORY_TEST_REG:
+	case KHADAS_MCU_SHUTDOWN_NORMAL_STATUS_REG:
+		return false;
+	default:
+		return true;
+	}
+}
+
+static const struct regmap_config khadas_mcu_regmap_config = {
+	.reg_bits	= 8,
+	.reg_stride	= 1,
+	.val_bits	= 8,
+	.max_register	= KHADAS_MCU_CMD_FAN_STATUS_CTRL_REG,
+	.volatile_reg	= khadas_mcu_reg_volatile,
+	.writeable_reg	= khadas_mcu_reg_writeable,
+	.cache_type	= REGCACHE_RBTREE,
+};
+
+static struct mfd_cell khadas_mcu_fan_cells[] = {
+	/* VIM1/2 Rev13+ and VIM3 only */
+	{ .name = "khadas-mcu-fan-ctrl", },
+};
+
+static struct mfd_cell khadas_mcu_cells[] = {
+	{ .name = "khadas-mcu-user-mem", },
+};
+
+static int khadas_mcu_probe(struct i2c_client *client,
+		       const struct i2c_device_id *id)
+{
+	struct device *dev = &client->dev;
+	struct khadas_mcu *ddata;
+	int ret;
+
+	ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
+	if (!ddata)
+		return -ENOMEM;
+
+	i2c_set_clientdata(client, ddata);
+
+	ddata->dev = dev;
+
+	ddata->regmap = devm_regmap_init_i2c(client, &khadas_mcu_regmap_config);
+	if (IS_ERR(ddata->regmap)) {
+		ret = PTR_ERR(ddata->regmap);
+		dev_err(dev, "Failed to allocate register map: %d\n", ret);
+		return ret;
+	}
+
+	ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
+				   khadas_mcu_cells,
+				   ARRAY_SIZE(khadas_mcu_cells),
+				   NULL, 0, NULL);
+	if (ret)
+		return ret;
+
+	if (of_find_property(dev->of_node, "#cooling-cells", NULL))
+		return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
+					    khadas_mcu_fan_cells,
+					    ARRAY_SIZE(khadas_mcu_fan_cells),
+					    NULL, 0, NULL);
+
+	return 0;
+}
+
+static const struct of_device_id khadas_mcu_of_match[] = {
+	{ .compatible = "khadas,mcu", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, khadas_mcu_of_match);
+
+static struct i2c_driver khadas_mcu_driver = {
+	.driver = {
+		.name = "khadas-mcu-core",
+		.of_match_table = of_match_ptr(khadas_mcu_of_match),
+	},
+	.probe = khadas_mcu_probe,
+};
+module_i2c_driver(khadas_mcu_driver);
+
+MODULE_DESCRIPTION("Khadas MCU core driver");
+MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/khadas-mcu.h b/include/linux/mfd/khadas-mcu.h
new file mode 100644
index 000000000000..a99ba2ed0e4e
--- /dev/null
+++ b/include/linux/mfd/khadas-mcu.h
@@ -0,0 +1,91 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Khadas System control Microcontroller Register map
+ *
+ * Copyright (C) 2020 BayLibre SAS
+ *
+ * Author(s): Neil Armstrong <narmstrong@baylibre.com>
+ */
+
+#ifndef MFD_KHADAS_MCU_H
+#define MFD_KHADAS_MCU_H
+
+#define KHADAS_MCU_PASSWD_VEN_0_REG		0x00 /* RO */
+#define KHADAS_MCU_PASSWD_VEN_1_REG		0x01 /* RO */
+#define KHADAS_MCU_PASSWD_VEN_2_REG		0x02 /* RO */
+#define KHADAS_MCU_PASSWD_VEN_3_REG		0x03 /* RO */
+#define KHADAS_MCU_PASSWD_VEN_4_REG		0x04 /* RO */
+#define KHADAS_MCU_PASSWD_VEN_5_REG		0x05 /* RO */
+#define KHADAS_MCU_MAC_0_REG			0x06 /* RO */
+#define KHADAS_MCU_MAC_1_REG			0x07 /* RO */
+#define KHADAS_MCU_MAC_2_REG			0x08 /* RO */
+#define KHADAS_MCU_MAC_3_REG			0x09 /* RO */
+#define KHADAS_MCU_MAC_4_REG			0x0a /* RO */
+#define KHADAS_MCU_MAC_5_REG			0x0b /* RO */
+#define KHADAS_MCU_USID_0_REG			0x0c /* RO */
+#define KHADAS_MCU_USID_1_REG			0x0d /* RO */
+#define KHADAS_MCU_USID_2_REG			0x0e /* RO */
+#define KHADAS_MCU_USID_3_REG			0x0f /* RO */
+#define KHADAS_MCU_USID_4_REG			0x10 /* RO */
+#define KHADAS_MCU_USID_5_REG			0x11 /* RO */
+#define KHADAS_MCU_VERSION_0_REG		0x12 /* RO */
+#define KHADAS_MCU_VERSION_1_REG		0x13 /* RO */
+#define KHADAS_MCU_DEVICE_NO_0_REG		0x14 /* RO */
+#define KHADAS_MCU_DEVICE_NO_1_REG		0x15 /* RO */
+#define KHADAS_MCU_FACTORY_TEST_REG		0x16 /* R */
+#define KHADAS_MCU_BOOT_MODE_REG		0x20 /* RW */
+#define KHADAS_MCU_BOOT_EN_WOL_REG		0x21 /* RW */
+#define KHADAS_MCU_BOOT_EN_RTC_REG		0x22 /* RW */
+#define KHADAS_MCU_BOOT_EN_EXP_REG		0x23 /* RW */
+#define KHADAS_MCU_BOOT_EN_IR_REG		0x24 /* RW */
+#define KHADAS_MCU_BOOT_EN_DCIN_REG		0x25 /* RW */
+#define KHADAS_MCU_BOOT_EN_KEY_REG		0x26 /* RW */
+#define KHADAS_MCU_KEY_MODE_REG			0x27 /* RW */
+#define KHADAS_MCU_LED_MODE_ON_REG		0x28 /* RW */
+#define KHADAS_MCU_LED_MODE_OFF_REG		0x29 /* RW */
+#define KHADAS_MCU_SHUTDOWN_NORMAL_REG		0x2c /* RW */
+#define KHADAS_MCU_MAC_SWITCH_REG		0x2d /* RW */
+#define KHADAS_MCU_MCU_SLEEP_MODE_REG		0x2e /* RW */
+#define KHADAS_MCU_IR_CODE1_0_REG		0x2f /* RW */
+#define KHADAS_MCU_IR_CODE1_1_REG		0x30 /* RW */
+#define KHADAS_MCU_IR_CODE1_2_REG		0x31 /* RW */
+#define KHADAS_MCU_IR_CODE1_3_REG		0x32 /* RW */
+#define KHADAS_MCU_USB_PCIE_SWITCH_REG		0x33 /* RW */
+#define KHADAS_MCU_IR_CODE2_0_REG		0x34 /* RW */
+#define KHADAS_MCU_IR_CODE2_1_REG		0x35 /* RW */
+#define KHADAS_MCU_IR_CODE2_2_REG		0x36 /* RW */
+#define KHADAS_MCU_IR_CODE2_3_REG		0x37 /* RW */
+#define KHADAS_MCU_PASSWD_USER_0_REG		0x40 /* RW */
+#define KHADAS_MCU_PASSWD_USER_1_REG		0x41 /* RW */
+#define KHADAS_MCU_PASSWD_USER_2_REG		0x42 /* RW */
+#define KHADAS_MCU_PASSWD_USER_3_REG		0x43 /* RW */
+#define KHADAS_MCU_PASSWD_USER_4_REG		0x44 /* RW */
+#define KHADAS_MCU_PASSWD_USER_5_REG		0x45 /* RW */
+#define KHADAS_MCU_USER_DATA_0_REG		0x46 /* RW 56 bytes */
+#define KHADAS_MCU_PWR_OFF_CMD_REG		0x80 /* WO */
+#define KHADAS_MCU_PASSWD_START_REG		0x81 /* WO */
+#define KHADAS_MCU_CHECK_VEN_PASSWD_REG		0x82 /* WO */
+#define KHADAS_MCU_CHECK_USER_PASSWD_REG	0x83 /* WO */
+#define KHADAS_MCU_SHUTDOWN_NORMAL_STATUS_REG	0x86 /* RO */
+#define KHADAS_MCU_WOL_INIT_START_REG		0x87 /* WO */
+#define KHADAS_MCU_CMD_FAN_STATUS_CTRL_REG	0x88 /* WO */
+
+enum {
+	KHADAS_BOARD_VIM1 = 0x1,
+	KHADAS_BOARD_VIM2,
+	KHADAS_BOARD_VIM3,
+	KHADAS_BOARD_EDGE = 0x11,
+	KHADAS_BOARD_EDGE_V,
+};
+
+/**
+ * struct khadas_mcu - Khadas MCU structure
+ * @device:		device reference used for logs
+ * @regmap:		register map
+ */
+struct khadas_mcu {
+	struct device *dev;
+	struct regmap *regmap;
+};
+
+#endif /* MFD_KHADAS_MCU_H */
-- 
2.22.0


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[PATCH v3 3/5] thermal: add support for the MCU controlled FAN on Khadas boards

[Neil Armstrong]

The new Khadas VIM2 and VIM3 boards controls the cooling fan via the
on-board microcontroller.

This implements the FAN control as thermal devices and as cell of the Khadas
MCU MFD driver.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 drivers/thermal/Kconfig          |  11 ++
 drivers/thermal/Makefile         |   1 +
 drivers/thermal/khadas_mcu_fan.c | 174 +++++++++++++++++++++++++++++++
 3 files changed, 186 insertions(+)
 create mode 100644 drivers/thermal/khadas_mcu_fan.c

diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index 91af271e9bb0..53efd381f434 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -490,4 +490,15 @@ config SPRD_THERMAL
 	help
 	  Support for the Spreadtrum thermal sensor driver in the Linux thermal
 	  framework.
+
+config KHADAS_MCU_FAN_THERMAL
+	tristate "Khadas MCU controller FAN cooling support"
+	depends on OF || COMPILE_TEST
+	depends on MFD_KHADAS_MCU
+	select MFD_CORE
+	select REGMAP
+	help
+	  If you say yes here you get support for the FAN controlled
+	  by the Microcontroller found on the Khadas VIM boards.
+
 endif
diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile
index 8c8ed7b79915..460428c2122c 100644
--- a/drivers/thermal/Makefile
+++ b/drivers/thermal/Makefile
@@ -60,3 +60,4 @@ obj-$(CONFIG_ZX2967_THERMAL)	+= zx2967_thermal.o
 obj-$(CONFIG_UNIPHIER_THERMAL)	+= uniphier_thermal.o
 obj-$(CONFIG_AMLOGIC_THERMAL)     += amlogic_thermal.o
 obj-$(CONFIG_SPRD_THERMAL)	+= sprd_thermal.o
+obj-$(CONFIG_KHADAS_MCU_FAN_THERMAL)	+= khadas_mcu_fan.o
diff --git a/drivers/thermal/khadas_mcu_fan.c b/drivers/thermal/khadas_mcu_fan.c
new file mode 100644
index 000000000000..6995b443cad4
--- /dev/null
+++ b/drivers/thermal/khadas_mcu_fan.c
@@ -0,0 +1,174 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Khadas MCU Controlled FAN driver
+ *
+ * Copyright (C) 2020 BayLibre SAS
+ * Author(s): Neil Armstrong <narmstrong@baylibre.com>
+ */
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/khadas-mcu.h>
+#include <linux/regmap.h>
+#include <linux/sysfs.h>
+#include <linux/thermal.h>
+
+#define MAX_LEVEL 3
+
+struct khadas_mcu_fan_ctx {
+	struct khadas_mcu *mcu;
+	unsigned int level;
+	struct thermal_cooling_device *cdev;
+};
+
+static int khadas_mcu_fan_set_level(struct khadas_mcu_fan_ctx *ctx,
+				    unsigned int level)
+{
+	int ret;
+
+	ret = regmap_write(ctx->mcu->regmap, KHADAS_MCU_CMD_FAN_STATUS_CTRL_REG,
+			   level);
+	if (ret)
+		return ret;
+
+	ctx->level = level;
+
+	return 0;
+}
+
+static int khadas_mcu_fan_get_max_state(struct thermal_cooling_device *cdev,
+					unsigned long *state)
+{
+	struct khadas_mcu_fan_ctx *ctx = cdev->devdata;
+
+	if (!ctx)
+		return -EINVAL;
+
+	*state = MAX_LEVEL;
+
+	return 0;
+}
+
+static int khadas_mcu_fan_get_cur_state(struct thermal_cooling_device *cdev,
+					unsigned long *state)
+{
+	struct khadas_mcu_fan_ctx *ctx = cdev->devdata;
+
+	if (!ctx)
+		return -EINVAL;
+
+	*state = ctx->level;
+
+	return 0;
+}
+
+static int
+khadas_mcu_fan_set_cur_state(struct thermal_cooling_device *cdev,
+			     unsigned long state)
+{
+	struct khadas_mcu_fan_ctx *ctx = cdev->devdata;
+
+	if (!ctx || (state > MAX_LEVEL))
+		return -EINVAL;
+
+	if (state == ctx->level)
+		return 0;
+
+	return khadas_mcu_fan_set_level(ctx, state);
+}
+
+static const struct thermal_cooling_device_ops khadas_mcu_fan_cooling_ops = {
+	.get_max_state = khadas_mcu_fan_get_max_state,
+	.get_cur_state = khadas_mcu_fan_get_cur_state,
+	.set_cur_state = khadas_mcu_fan_set_cur_state,
+};
+
+static int khadas_mcu_fan_probe(struct platform_device *pdev)
+{
+	struct khadas_mcu *mcu = dev_get_drvdata(pdev->dev.parent);
+	struct thermal_cooling_device *cdev;
+	struct device *dev = &pdev->dev;
+	struct khadas_mcu_fan_ctx *ctx;
+	int ret;
+
+	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+	ctx->mcu = mcu;
+	platform_set_drvdata(pdev, ctx);
+
+	cdev = devm_thermal_of_cooling_device_register(dev->parent,
+			dev->parent->of_node, "khadas-mcu-fan", ctx,
+			&khadas_mcu_fan_cooling_ops);
+	if (IS_ERR(cdev)) {
+		ret = PTR_ERR(cdev);
+		dev_err(dev,
+				"Failed to register khadas-mcu-fan as cooling device: %d\n",
+				ret);
+		return ret;
+	}
+	ctx->cdev = cdev;
+	thermal_cdev_update(cdev);
+
+	return 0;
+}
+
+static int khadas_mcu_fan_disable(struct device *dev)
+{
+	struct khadas_mcu_fan_ctx *ctx = dev_get_drvdata(dev);
+	unsigned int level_save = ctx->level;
+	int ret;
+
+	ret = khadas_mcu_fan_set_level(ctx, 0);
+	if (ret)
+		return ret;
+
+	ctx->level = level_save;
+
+	return 0;
+}
+
+static void khadas_mcu_fan_shutdown(struct platform_device *pdev)
+{
+	khadas_mcu_fan_disable(&pdev->dev);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int khadas_mcu_fan_suspend(struct device *dev)
+{
+	return khadas_mcu_fan_disable(dev);
+}
+
+static int khadas_mcu_fan_resume(struct device *dev)
+{
+	struct khadas_mcu_fan_ctx *ctx = dev_get_drvdata(dev);
+
+	return khadas_mcu_fan_set_level(ctx, ctx->level);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(khadas_mcu_fan_pm, khadas_mcu_fan_suspend,
+			 khadas_mcu_fan_resume);
+
+static const struct platform_device_id khadas_mcu_fan_id_table[] = {
+	{ .name = "khadas-mcu-fan-ctrl", },
+	{},
+};
+MODULE_DEVICE_TABLE(platform, khadas_mcu_fan_id_table);
+
+static struct platform_driver khadas_mcu_fan_driver = {
+	.probe		= khadas_mcu_fan_probe,
+	.shutdown	= khadas_mcu_fan_shutdown,
+	.driver	= {
+		.name		= "khadas-mcu-fan-ctrl",
+		.pm		= &khadas_mcu_fan_pm,
+	},
+	.id_table	= khadas_mcu_fan_id_table,
+};
+
+module_platform_driver(khadas_mcu_fan_driver);
+
+MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
+MODULE_DESCRIPTION("Khadas MCU FAN driver");
+MODULE_LICENSE("GPL");
-- 
2.22.0


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[PATCH v3 4/5] MAINTAINERS: add myself as maintainer for Khadas MCU drivers

[Neil Armstrong]

Add the Thermal driver along the MFD drivers and header as Maintained
by myself.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 MAINTAINERS | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 50659d76976b..29d35fe0f886 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9436,6 +9436,15 @@ F:	include/linux/kdb.h
 F:	include/linux/kgdb.h
 F:	kernel/debug/
 
+KHADAS MCU MFD DRIVER
+M:	Neil Armstrong <narmstrong@baylibre.com>
+L:	linux-amlogic@lists.infradead.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
+F:	drivers/mfd/khadas-mcu.c
+F:	include/linux/mfd/khadas-mcu.h
+F:	drivers/thermal/khadas_mcu_fan.c
+
 KMEMLEAK
 M:	Catalin Marinas <catalin.marinas@arm.com>
 S:	Maintained
-- 
2.22.0


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[PATCH v3 5/5] arm64: dts: meson-khadas-vim3: add Khadas MCU nodes

[Neil Armstrong]

Add the Khadas MCU node with active FAN thermal nodes for all the
Khadas VIM3 variants.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 .../boot/dts/amlogic/meson-khadas-vim3.dtsi   | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi b/arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi
index 094ecf2222bb..3325e54ea690 100644
--- a/arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi
@@ -183,6 +183,23 @@
 	hdmi-phandle = <&hdmi_tx>;
 };
 
+&cpu_thermal {
+	trips {
+		cpu_active: cpu-active {
+			temperature = <80000>; /* millicelsius */
+			hysteresis = <2000>; /* millicelsius */
+			type = "active";
+		};
+	};
+
+	cooling-maps {
+		map {
+			trip = <&cpu_active>;
+			cooling-device = <&khadas_mcu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+		};
+	};
+};
+
 &ext_mdio {
 	external_phy: ethernet-phy@0 {
 		/* Realtek RTL8211F (0x001cc916) */
@@ -222,6 +239,12 @@
 	pinctrl-0 = <&i2c_ao_sck_pins>, <&i2c_ao_sda_pins>;
 	pinctrl-names = "default";
 
+	khadas_mcu: system-controller@18 {
+		compatible = "khadas,mcu";
+		reg = <0x18>;
+		#cooling-cells = <2>;
+	};
+
 	gpio_expander: gpio-controller@20 {
 		compatible = "ti,tca6408";
 		reg = <0x20>;
-- 
2.22.0


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Re: [PATCH v3 3/5] thermal: add support for the MCU controlled FAN on Khadas boards

[Amit Kucheria]

On Mon, Jun 8, 2020 at 2:47 PM Neil Armstrong <narmstrong@baylibre.com> wrote:
>
> The new Khadas VIM2 and VIM3 boards controls the cooling fan via the
> on-board microcontroller.
>
> This implements the FAN control as thermal devices and as cell of the Khadas
> MCU MFD driver.
>
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>


> ---
>  drivers/thermal/Kconfig          |  11 ++
>  drivers/thermal/Makefile         |   1 +
>  drivers/thermal/khadas_mcu_fan.c | 174 +++++++++++++++++++++++++++++++
>  3 files changed, 186 insertions(+)
>  create mode 100644 drivers/thermal/khadas_mcu_fan.c
>
> diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
> index 91af271e9bb0..53efd381f434 100644
> --- a/drivers/thermal/Kconfig
> +++ b/drivers/thermal/Kconfig
> @@ -490,4 +490,15 @@ config SPRD_THERMAL
>         help
>           Support for the Spreadtrum thermal sensor driver in the Linux thermal
>           framework.
> +
> +config KHADAS_MCU_FAN_THERMAL
> +       tristate "Khadas MCU controller FAN cooling support"
> +       depends on OF || COMPILE_TEST
> +       depends on MFD_KHADAS_MCU
> +       select MFD_CORE
> +       select REGMAP
> +       help
> +         If you say yes here you get support for the FAN controlled
> +         by the Microcontroller found on the Khadas VIM boards.
> +
>  endif
> diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile
> index 8c8ed7b79915..460428c2122c 100644
> --- a/drivers/thermal/Makefile
> +++ b/drivers/thermal/Makefile
> @@ -60,3 +60,4 @@ obj-$(CONFIG_ZX2967_THERMAL)  += zx2967_thermal.o
>  obj-$(CONFIG_UNIPHIER_THERMAL) += uniphier_thermal.o
>  obj-$(CONFIG_AMLOGIC_THERMAL)     += amlogic_thermal.o
>  obj-$(CONFIG_SPRD_THERMAL)     += sprd_thermal.o
> +obj-$(CONFIG_KHADAS_MCU_FAN_THERMAL)   += khadas_mcu_fan.o
> diff --git a/drivers/thermal/khadas_mcu_fan.c b/drivers/thermal/khadas_mcu_fan.c
> new file mode 100644
> index 000000000000..6995b443cad4
> --- /dev/null
> +++ b/drivers/thermal/khadas_mcu_fan.c
> @@ -0,0 +1,174 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Khadas MCU Controlled FAN driver
> + *
> + * Copyright (C) 2020 BayLibre SAS
> + * Author(s): Neil Armstrong <narmstrong@baylibre.com>
> + */
> +
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/platform_device.h>
> +#include <linux/mfd/khadas-mcu.h>
> +#include <linux/regmap.h>
> +#include <linux/sysfs.h>
> +#include <linux/thermal.h>
> +
> +#define MAX_LEVEL 3
> +
> +struct khadas_mcu_fan_ctx {
> +       struct khadas_mcu *mcu;
> +       unsigned int level;
> +       struct thermal_cooling_device *cdev;
> +};
> +
> +static int khadas_mcu_fan_set_level(struct khadas_mcu_fan_ctx *ctx,
> +                                   unsigned int level)
> +{
> +       int ret;
> +
> +       ret = regmap_write(ctx->mcu->regmap, KHADAS_MCU_CMD_FAN_STATUS_CTRL_REG,
> +                          level);
> +       if (ret)
> +               return ret;
> +
> +       ctx->level = level;
> +
> +       return 0;
> +}
> +
> +static int khadas_mcu_fan_get_max_state(struct thermal_cooling_device *cdev,
> +                                       unsigned long *state)
> +{
> +       struct khadas_mcu_fan_ctx *ctx = cdev->devdata;
> +
> +       if (!ctx)
> +               return -EINVAL;
> +
> +       *state = MAX_LEVEL;
> +
> +       return 0;
> +}
> +
> +static int khadas_mcu_fan_get_cur_state(struct thermal_cooling_device *cdev,
> +                                       unsigned long *state)
> +{
> +       struct khadas_mcu_fan_ctx *ctx = cdev->devdata;
> +
> +       if (!ctx)
> +               return -EINVAL;
> +
> +       *state = ctx->level;
> +
> +       return 0;
> +}
> +
> +static int
> +khadas_mcu_fan_set_cur_state(struct thermal_cooling_device *cdev,
> +                            unsigned long state)
> +{
> +       struct khadas_mcu_fan_ctx *ctx = cdev->devdata;
> +
> +       if (!ctx || (state > MAX_LEVEL))
> +               return -EINVAL;
> +
> +       if (state == ctx->level)
> +               return 0;
> +
> +       return khadas_mcu_fan_set_level(ctx, state);
> +}
> +
> +static const struct thermal_cooling_device_ops khadas_mcu_fan_cooling_ops = {
> +       .get_max_state = khadas_mcu_fan_get_max_state,
> +       .get_cur_state = khadas_mcu_fan_get_cur_state,
> +       .set_cur_state = khadas_mcu_fan_set_cur_state,
> +};
> +
> +static int khadas_mcu_fan_probe(struct platform_device *pdev)
> +{
> +       struct khadas_mcu *mcu = dev_get_drvdata(pdev->dev.parent);
> +       struct thermal_cooling_device *cdev;
> +       struct device *dev = &pdev->dev;
> +       struct khadas_mcu_fan_ctx *ctx;
> +       int ret;
> +
> +       ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
> +       if (!ctx)
> +               return -ENOMEM;
> +       ctx->mcu = mcu;
> +       platform_set_drvdata(pdev, ctx);
> +
> +       cdev = devm_thermal_of_cooling_device_register(dev->parent,
> +                       dev->parent->of_node, "khadas-mcu-fan", ctx,
> +                       &khadas_mcu_fan_cooling_ops);
> +       if (IS_ERR(cdev)) {
> +               ret = PTR_ERR(cdev);
> +               dev_err(dev,
> +                               "Failed to register khadas-mcu-fan as cooling device: %d\n",
> +                               ret);
> +               return ret;
> +       }
> +       ctx->cdev = cdev;
> +       thermal_cdev_update(cdev);
> +
> +       return 0;
> +}
> +
> +static int khadas_mcu_fan_disable(struct device *dev)
> +{
> +       struct khadas_mcu_fan_ctx *ctx = dev_get_drvdata(dev);
> +       unsigned int level_save = ctx->level;
> +       int ret;
> +
> +       ret = khadas_mcu_fan_set_level(ctx, 0);
> +       if (ret)
> +               return ret;
> +
> +       ctx->level = level_save;
> +
> +       return 0;
> +}
> +
> +static void khadas_mcu_fan_shutdown(struct platform_device *pdev)
> +{
> +       khadas_mcu_fan_disable(&pdev->dev);
> +}
> +
> +#ifdef CONFIG_PM_SLEEP
> +static int khadas_mcu_fan_suspend(struct device *dev)
> +{
> +       return khadas_mcu_fan_disable(dev);
> +}
> +
> +static int khadas_mcu_fan_resume(struct device *dev)
> +{
> +       struct khadas_mcu_fan_ctx *ctx = dev_get_drvdata(dev);
> +
> +       return khadas_mcu_fan_set_level(ctx, ctx->level);
> +}
> +#endif
> +
> +static SIMPLE_DEV_PM_OPS(khadas_mcu_fan_pm, khadas_mcu_fan_suspend,
> +                        khadas_mcu_fan_resume);
> +
> +static const struct platform_device_id khadas_mcu_fan_id_table[] = {
> +       { .name = "khadas-mcu-fan-ctrl", },
> +       {},
> +};
> +MODULE_DEVICE_TABLE(platform, khadas_mcu_fan_id_table);
> +
> +static struct platform_driver khadas_mcu_fan_driver = {
> +       .probe          = khadas_mcu_fan_probe,
> +       .shutdown       = khadas_mcu_fan_shutdown,
> +       .driver = {
> +               .name           = "khadas-mcu-fan-ctrl",
> +               .pm             = &khadas_mcu_fan_pm,
> +       },
> +       .id_table       = khadas_mcu_fan_id_table,
> +};
> +
> +module_platform_driver(khadas_mcu_fan_driver);
> +
> +MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
> +MODULE_DESCRIPTION("Khadas MCU FAN driver");
> +MODULE_LICENSE("GPL");
> --
> 2.22.0
>

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Re: [PATCH v3 5/5] arm64: dts: meson-khadas-vim3: add Khadas MCU nodes

[Amit Kucheria]

On Mon, Jun 8, 2020 at 2:47 PM Neil Armstrong <narmstrong@baylibre.com> wrote:
>
> Add the Khadas MCU node with active FAN thermal nodes for all the
> Khadas VIM3 variants.
>
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>


> ---
>  .../boot/dts/amlogic/meson-khadas-vim3.dtsi   | 23 +++++++++++++++++++
>  1 file changed, 23 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi b/arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi
> index 094ecf2222bb..3325e54ea690 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi
> @@ -183,6 +183,23 @@
>         hdmi-phandle = <&hdmi_tx>;
>  };
>
> +&cpu_thermal {
> +       trips {
> +               cpu_active: cpu-active {
> +                       temperature = <80000>; /* millicelsius */
> +                       hysteresis = <2000>; /* millicelsius */
> +                       type = "active";
> +               };
> +       };
> +
> +       cooling-maps {
> +               map {
> +                       trip = <&cpu_active>;
> +                       cooling-device = <&khadas_mcu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> +               };
> +       };
> +};
> +
>  &ext_mdio {
>         external_phy: ethernet-phy@0 {
>                 /* Realtek RTL8211F (0x001cc916) */
> @@ -222,6 +239,12 @@
>         pinctrl-0 = <&i2c_ao_sck_pins>, <&i2c_ao_sda_pins>;
>         pinctrl-names = "default";
>
> +       khadas_mcu: system-controller@18 {
> +               compatible = "khadas,mcu";
> +               reg = <0x18>;
> +               #cooling-cells = <2>;
> +       };
> +
>         gpio_expander: gpio-controller@20 {
>                 compatible = "ti,tca6408";
>                 reg = <0x20>;
> --
> 2.22.0
>

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Re: [PATCH v3 2/5] mfd: add support for the Khadas System control Microcontroller

[Lee Jones]

On Mon, 08 Jun 2020, Neil Armstrong wrote:

> This Microcontroller is present on the Khadas VIM1, VIM2, VIM3 and Edge
> boards.
> 
> It has multiple boot control features like password check, power-on
> options, power-off control and system FAN control on recent boards.
> 
> This implements a very basic MFD driver with the fan control and User
> NVMEM cells.
> 
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
> ---

A patch-level change log makes reviewing easier.

>  drivers/mfd/Kconfig            |  21 +++++
>  drivers/mfd/Makefile           |   1 +
>  drivers/mfd/khadas-mcu.c       | 142 +++++++++++++++++++++++++++++++++
>  include/linux/mfd/khadas-mcu.h |  91 +++++++++++++++++++++
>  4 files changed, 255 insertions(+)
>  create mode 100644 drivers/mfd/khadas-mcu.c
>  create mode 100644 include/linux/mfd/khadas-mcu.h

Nicely done.

Applied, thanks.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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Re: [PATCH v3 1/5] dt-bindings: mfd: add Khadas Microcontroller bindings

[Lee Jones]

On Mon, 08 Jun 2020, Neil Armstrong wrote:

> This Microcontroller is present on the Khadas VIM1, VIM2, VIM3 and Edge
> boards.
> 
> It has multiple boot control features like password check, power-on
> options, power-off control and system FAN control on recent boards.
> 
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
> Reviewed-by: Rob Herring <robh@kernel.org>
> ---
>  .../devicetree/bindings/mfd/khadas,mcu.yaml   | 44 +++++++++++++++++++
>  1 file changed, 44 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/khadas,mcu.yaml

Applied, thanks.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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Re: [PATCH v3 4/5] MAINTAINERS: add myself as maintainer for Khadas MCU drivers

[Lee Jones]

On Mon, 08 Jun 2020, Neil Armstrong wrote:

> Add the Thermal driver along the MFD drivers and header as Maintained
> by myself.
> 
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
> ---
>  MAINTAINERS | 9 +++++++++
>  1 file changed, 9 insertions(+)

Applied, thanks.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
Follow Linaro: Facebook | Twitter | Blog

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Re: [PATCH v3 0/5] mfd: Add support for Khadas Microcontroller

[Lee Jones]

On Mon, 08 Jun 2020, Neil Armstrong wrote:

> The new Khadas VIM2, VIM3 and Edge boards embeds an on-board microcontroller
> connected via I2C.
> 
> This Microcontroller is present on the Khadas VIM1, VIM2, VIM3 and Edge
> boards.
> 
> It has multiple boot control features like password check, power-on
> options, power-off control and system FAN control on recent boards.
> 
> Thie serie adds :
> - the bindings
> - the MFD driver
> - the Thermal Cooling cell driver
> - updates MAINTAINERS
> - add support into the Khadas VIM3/VIM3L DT
> 
> Changes since v2 at [3]:
> - Removed NVMEM driver for separate submission
> - fixed MFD driver, header and Kconfig
> - fixed Thermal Kconfig
> - fixed MAINTAINERS files and path
> 
> Changes since RFC v1 at [2]:
> - moved hwmon driver to thermal-only
> - moved the SM1 thermal nodes in a separate serie
> - added the bindings review tag from rob
> 
> [1] http://lore.kernel.org/r/20200512093916.19676-1-narmstrong@baylibre.com
> [2] http://lore.kernel.org/r/20200421080102.22796-1-narmstrong@baylibre.com
> [3] http://lore.kernel.org/r/20200512132613.31507-1-narmstrong@baylibre.com
> 
> Neil Armstrong (5):
>   dt-bindings: mfd: add Khadas Microcontroller bindings
>   mfd: add support for the Khadas System control Microcontroller
>   thermal: add support for the MCU controlled FAN on Khadas boards
>   MAINTAINERS: add myself as maintainer for Khadas MCU drivers
>   arm64: dts: meson-khadas-vim3: add Khadas MCU nodes

I'm a bit concerned by the missing patches from my inbox.

Looks like you omitted to send me patch 3 and 5.

Hopefully the Thermal patch doesn't depend on the MFD one!

>  .../devicetree/bindings/mfd/khadas,mcu.yaml   |  44 +++++
>  MAINTAINERS                                   |   9 +
>  .../boot/dts/amlogic/meson-khadas-vim3.dtsi   |  23 +++
>  drivers/mfd/Kconfig                           |  21 +++
>  drivers/mfd/Makefile                          |   1 +
>  drivers/mfd/khadas-mcu.c                      | 142 ++++++++++++++
>  drivers/thermal/Kconfig                       |  11 ++
>  drivers/thermal/Makefile                      |   1 +
>  drivers/thermal/khadas_mcu_fan.c              | 174 ++++++++++++++++++
>  include/linux/mfd/khadas-mcu.h                |  91 +++++++++
>  10 files changed, 517 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
>  create mode 100644 drivers/mfd/khadas-mcu.c
>  create mode 100644 drivers/thermal/khadas_mcu_fan.c
>  create mode 100644 include/linux/mfd/khadas-mcu.h
> 

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
Follow Linaro: Facebook | Twitter | Blog

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Re: [PATCH v3 0/5] mfd: Add support for Khadas Microcontroller

[Neil Armstrong]

Hi,

On 18/06/2020 10:19, Lee Jones wrote:
> On Mon, 08 Jun 2020, Neil Armstrong wrote:
> 
>> The new Khadas VIM2, VIM3 and Edge boards embeds an on-board microcontroller
>> connected via I2C.
>>
>> This Microcontroller is present on the Khadas VIM1, VIM2, VIM3 and Edge
>> boards.
>>
>> It has multiple boot control features like password check, power-on
>> options, power-off control and system FAN control on recent boards.
>>
>> Thie serie adds :
>> - the bindings
>> - the MFD driver
>> - the Thermal Cooling cell driver
>> - updates MAINTAINERS
>> - add support into the Khadas VIM3/VIM3L DT
>>
>> Changes since v2 at [3]:
>> - Removed NVMEM driver for separate submission
>> - fixed MFD driver, header and Kconfig
>> - fixed Thermal Kconfig
>> - fixed MAINTAINERS files and path
>>
>> Changes since RFC v1 at [2]:
>> - moved hwmon driver to thermal-only
>> - moved the SM1 thermal nodes in a separate serie
>> - added the bindings review tag from rob
>>
>> [1] http://lore.kernel.org/r/20200512093916.19676-1-narmstrong@baylibre.com
>> [2] http://lore.kernel.org/r/20200421080102.22796-1-narmstrong@baylibre.com
>> [3] http://lore.kernel.org/r/20200512132613.31507-1-narmstrong@baylibre.com
>>
>> Neil Armstrong (5):
>>   dt-bindings: mfd: add Khadas Microcontroller bindings
>>   mfd: add support for the Khadas System control Microcontroller
>>   thermal: add support for the MCU controlled FAN on Khadas boards
>>   MAINTAINERS: add myself as maintainer for Khadas MCU drivers
>>   arm64: dts: meson-khadas-vim3: add Khadas MCU nodes
> 
> I'm a bit concerned by the missing patches from my inbox.

Oops sorry, I'll resend the full serie with you in CC

> 
> Looks like you omitted to send me patch 3 and 5.
> 
> Hopefully the Thermal patch doesn't depend on the MFD one!

It does ! It includes the include/linux/mfd/khadas-mcu.h file

Amit reviewed the thermal patches already.

Neil

> 
>>  .../devicetree/bindings/mfd/khadas,mcu.yaml   |  44 +++++
>>  MAINTAINERS                                   |   9 +
>>  .../boot/dts/amlogic/meson-khadas-vim3.dtsi   |  23 +++
>>  drivers/mfd/Kconfig                           |  21 +++
>>  drivers/mfd/Makefile                          |   1 +
>>  drivers/mfd/khadas-mcu.c                      | 142 ++++++++++++++
>>  drivers/thermal/Kconfig                       |  11 ++
>>  drivers/thermal/Makefile                      |   1 +
>>  drivers/thermal/khadas_mcu_fan.c              | 174 ++++++++++++++++++
>>  include/linux/mfd/khadas-mcu.h                |  91 +++++++++
>>  10 files changed, 517 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
>>  create mode 100644 drivers/mfd/khadas-mcu.c
>>  create mode 100644 drivers/thermal/khadas_mcu_fan.c
>>  create mode 100644 include/linux/mfd/khadas-mcu.h
>>
> 


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