mfd: simple-mfd-i2c: Enable support for the silergy,sy7636a

Signed-off-by: Alistair Francis <alistair@alistair23.me>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/drivers/mfd/simple-mfd-i2c.c b/drivers/mfd/simple-mfd-i2c.c
index 5153669..f4c8fc3 100644 (file)
--- a/drivers/mfd/simple-mfd-i2c.c
+++ b/drivers/mfd/simple-mfd-i2c.c
@@ -62,8 +62,19 @@ static int simple_mfd_i2c_probe(struct i2c_client *i2c)
        return ret;
 }
 
+static const struct mfd_cell sy7636a_cells[] = {
+       { .name = "sy7636a-regulator", },
+       { .name = "sy7636a-temperature", },
+};
+
+static const struct simple_mfd_data silergy_sy7636a = {
+       .mfd_cell = sy7636a_cells,
+       .mfd_cell_size = ARRAY_SIZE(sy7636a_cells),
+};
+
 static const struct of_device_id simple_mfd_i2c_of_match[] = {
        { .compatible = "kontron,sl28cpld" },
+       { .compatible = "silergy,sy7636a", .data = &silergy_sy7636a},
        {}
 };
 MODULE_DEVICE_TABLE(of, simple_mfd_i2c_of_match);

diff --git a/include/linux/mfd/sy7636a.h b/include/linux/mfd/sy7636a.h
new file mode 100644 (file)
index 0000000..22f03b2
--- /dev/null
+++ b/include/linux/mfd/sy7636a.h
@@ -0,0 +1,34 @@
+/* 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
+
+#define SY7636A_REG_OPERATION_MODE_CRL         0x00
+/* It is set if a gpio is used to control the regulator */
+#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_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
+
+#endif /* __LINUX_MFD_SY7636A_H */