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Message-Id: <20210803084456.198-2-alistair@alistair23.me>
Date: Tue, 3 Aug 2021 18:44:49 +1000
From: Alistair Francis <alistair@...stair23.me>
To: lee.jones@...aro.org, robh+dt@...nel.org, lgirdwood@...il.com,
broonie@...nel.org, linux-imx@....com, kernel@...gutronix.de
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
alistair23@...il.com, Alistair Francis <alistair@...stair23.me>
Subject: [PATCH v8 02/11] mfd: sy7636a: Initial commit
Initial support for the Silergy SY7636A Power Management chip.
Signed-off-by: Alistair Francis <alistair@...stair23.me>
---
drivers/mfd/Kconfig | 9 +++++
drivers/mfd/Makefile | 1 +
drivers/mfd/sy7636a.c | 72 +++++++++++++++++++++++++++++++++++++
include/linux/mfd/sy7636a.h | 45 +++++++++++++++++++++++
4 files changed, 127 insertions(+)
create mode 100644 drivers/mfd/sy7636a.c
create mode 100644 include/linux/mfd/sy7636a.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 6a3fd2d75f96..b82208f0c79c 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1352,6 +1352,15 @@ config MFD_SYSCON
Select this option to enable accessing system control registers
via regmap.
+config MFD_SY7636A
+ tristate "Silergy SY7636A Power Management IC"
+ select MFD_CORE
+ select REGMAP_I2C
+ depends on I2C
+ help
+ Select this option to enable support for the Silergy SY7636A
+ Power Management IC.
+
config MFD_DAVINCI_VOICECODEC
tristate
select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 8116c19d5fd4..cbe581e87fa9 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -266,6 +266,7 @@ obj-$(CONFIG_MFD_KHADAS_MCU) += khadas-mcu.o
obj-$(CONFIG_MFD_ACER_A500_EC) += acer-ec-a500.o
obj-$(CONFIG_MFD_QCOM_PM8008) += qcom-pm8008.o
+obj-$(CONFIG_MFD_SY7636A) += sy7636a.o
obj-$(CONFIG_SGI_MFD_IOC3) += ioc3.o
obj-$(CONFIG_MFD_SIMPLE_MFD_I2C) += simple-mfd-i2c.o
obj-$(CONFIG_MFD_INTEL_M10_BMC) += intel-m10-bmc.o
diff --git a/drivers/mfd/sy7636a.c b/drivers/mfd/sy7636a.c
new file mode 100644
index 000000000000..f3ff93c7395d
--- /dev/null
+++ b/drivers/mfd/sy7636a.c
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * MFD parent driver for SY7636A chip
+ *
+ * Copyright (C) 2021 reMarkable AS - http://www.remarkable.com/
+ *
+ * Authors: Lars Ivar Miljeteig <lars.ivar.miljeteig@...arkable.com>
+ * Alistair Francis <alistair@...stair23.me>
+ *
+ * Based on the lp87565 driver by Keerthy <j-keerthy@...com>
+ */
+
+#include <linux/interrupt.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+
+#include <linux/mfd/sy7636a.h>
+
+static const struct regmap_config sy7636a_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static const struct mfd_cell sy7636a_cells[] = {
+ { .name = "sy7636a-regulator", },
+ { .name = "sy7636a-temperature", },
+ { .name = "sy7636a-thermal", },
+};
+
+static int sy7636a_probe(struct i2c_client *client)
+{
+ struct sy7636a *ddata;
+ int ret;
+
+ ddata = devm_kzalloc(&client->dev, sizeof(*ddata), GFP_KERNEL);
+ if (!ddata)
+ return -ENOMEM;
+
+ ddata->regmap = devm_regmap_init_i2c(client, &sy7636a_regmap_config);
+ if (IS_ERR(ddata->regmap)) {
+ ret = PTR_ERR(ddata->regmap);
+ dev_err(&client->dev,
+ "Failed to initialize register map: %d\n", ret);
+ return ret;
+ }
+
+ i2c_set_clientdata(client, ddata);
+
+ return devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_AUTO,
+ sy7636a_cells, ARRAY_SIZE(sy7636a_cells),
+ NULL, 0, NULL);
+}
+
+static const struct of_device_id of_sy7636a_match_table[] = {
+ { .compatible = "silergy,sy7636a", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, of_sy7636a_match_table);
+
+static struct i2c_driver sy7636a_driver = {
+ .driver = {
+ .name = "sy7636a",
+ .of_match_table = of_sy7636a_match_table,
+ },
+ .probe_new = sy7636a_probe,
+};
+module_i2c_driver(sy7636a_driver);
+
+MODULE_AUTHOR("Lars Ivar Miljeteig <lars.ivar.miljeteig@...arkable.com>");
+MODULE_DESCRIPTION("Silergy SY7636A Multi-Function Device Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/sy7636a.h b/include/linux/mfd/sy7636a.h
new file mode 100644
index 000000000000..5e9c537fee45
--- /dev/null
+++ b/include/linux/mfd/sy7636a.h
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Functions to access SY3686A power management chip.
+ *
+ * Copyright (C) 2021 reMarkable AS - http://www.remarkable.com/
+ */
+
+#ifndef __MFD_SY7636A_H
+#define __MFD_SY7636A_H
+
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+
+#define SY7636A_REG_OPERATION_MODE_CRL 0x00
+#define SY7636A_OPERATION_MODE_CRL_VCOMCTL BIT(6)
+#define SY7636A_OPERATION_MODE_CRL_ONOFF BIT(7)
+#define SY7636A_REG_VCOM_ADJUST_CTRL_L 0x01
+#define SY7636A_REG_VCOM_ADJUST_CTRL_H 0x02
+#define SY7636A_REG_VCOM_ADJUST_CTRL_MASK 0x01ff
+#define SY7636A_REG_VLDO_VOLTAGE_ADJULST_CTRL 0x03
+#define SY7636A_REG_POWER_ON_DELAY_TIME 0x06
+#define SY7636A_REG_FAULT_FLAG 0x07
+#define SY7636A_FAULT_FLAG_PG BIT(0)
+#define SY7636A_REG_TERMISTOR_READOUT 0x08
+
+#define SY7636A_REG_MAX 0x08
+
+#define VCOM_MIN 0
+#define VCOM_MAX 5000
+
+#define VCOM_ADJUST_CTRL_MASK 0x1ff
+// Used to shift the high byte
+#define VCOM_ADJUST_CTRL_SHIFT 8
+// Used to scale from VCOM_ADJUST_CTRL to mv
+#define VCOM_ADJUST_CTRL_SCAL 10000
+
+#define FAULT_FLAG_SHIFT 1
+
+struct sy7636a {
+ struct regmap *regmap;
+};
+
+#endif /* __LINUX_MFD_SY7636A_H */
--
2.31.1
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