linux-kernel - [PATCH v15 3/8] mfd: simple-mfd-i2c: Enable support for the silergy,sy7636a

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Message-Id: <20211110122948.188683-4-alistair@alistair23.me>
Date:   Wed, 10 Nov 2021 22:29:43 +1000
From:   Alistair Francis <alistair@...stair23.me>
To:     lee.jones@...aro.org, broonie@...nel.org, kernel@...gutronix.de,
        lgirdwood@...il.com, robh+dt@...nel.org
Cc:     linux-kernel@...r.kernel.org, rui.zhang@...el.com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        s.hauer@...gutronix.de, linux-hwmon@...r.kernel.org,
        amitk@...nel.org, linux-pm@...r.kernel.org, linux-imx@....com,
        alistair23@...il.com, andreas@...nade.info, shawnguo@...nel.org,
        Alistair Francis <alistair@...stair23.me>
Subject: [PATCH v15 3/8] mfd: simple-mfd-i2c: Enable support for the silergy,sy7636a

Signed-off-by: Alistair Francis <alistair@...stair23.me>
Acked-for-MFD-by: Lee Jones <lee.jones@...aro.org>
---
 drivers/mfd/simple-mfd-i2c.c | 11 +++++++++++
 include/linux/mfd/sy7636a.h  | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+)
 create mode 100644 include/linux/mfd/sy7636a.h

diff --git a/drivers/mfd/simple-mfd-i2c.c b/drivers/mfd/simple-mfd-i2c.c
index 51536691ad9d..f4c8fc3ee463 100644
--- 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
index 000000000000..2797c22dabc2
--- /dev/null
+++ b/include/linux/mfd/sy7636a.h
@@ -0,0 +1,36 @@
+/* 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
+#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
+
+#endif /* __LINUX_MFD_SY7636A_H */
-- 
2.31.1