[PATCH 2/6] mfd: adp5585: add ADI adp5585 core support

From: Frank Li
Date: Tue Jul 16 2024 - 15:29:53 EST

From: Haibo Chen <haibo.chen@xxxxxxx>

ADP5585 support multi function, include expander GPIO, pwm, keypad
controller.

Signed-off-by: Haibo Chen <haibo.chen@xxxxxxx>
Reviewed-by: Jun Li <jun.li@xxxxxxx>
Signed-off-by: Frank Li <Frank.Li@xxxxxxx>
---
drivers/mfd/Kconfig | 9 +++
drivers/mfd/Makefile | 1 +
drivers/mfd/adp5585.c | 134 ++++++++++++++++++++++++++++++++++++++++++++
include/linux/mfd/adp5585.h | 100 +++++++++++++++++++++++++++++++++
4 files changed, 244 insertions(+)

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index bc8be2e593b6b..62a967ee8ae1c 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -20,6 +20,15 @@ config MFD_CS5535
This is the core driver for CS5535/CS5536 MFD functions. This is
necessary for using the board's GPIO and MFGPT functionality.

+config MFD_ADP5585
+ tristate "ADI ADP5585 core functions"
+ select MFD_CORE
+ depends on I2C && OF
+
+ help
+ This is ADI adp5585 core support, implement the support for
+ communication through i2c bus.
+
config MFD_ALTERA_A10SR
bool "Altera Arria10 DevKit System Resource chip"
depends on ARCH_INTEL_SOCFPGA && SPI_MASTER=y && OF
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 02b651cd75352..2a9f91e81af83 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -193,6 +193,7 @@ obj-$(CONFIG_MFD_DB8500_PRCMU) += db8500-prcmu.o
obj-$(CONFIG_AB8500_CORE) += ab8500-core.o ab8500-sysctrl.o
obj-$(CONFIG_MFD_TIMBERDALE) += timberdale.o
obj-$(CONFIG_PMIC_ADP5520) += adp5520.o
+obj-$(CONFIG_MFD_ADP5585) += adp5585.o
obj-$(CONFIG_MFD_KEMPLD) += kempld-core.o
obj-$(CONFIG_MFD_INTEL_QUARK_I2C_GPIO) += intel_quark_i2c_gpio.o
obj-$(CONFIG_LPC_SCH) += lpc_sch.o
diff --git a/drivers/mfd/adp5585.c b/drivers/mfd/adp5585.c
new file mode 100644
index 0000000000000..52cc0d38bf2c3
--- /dev/null
+++ b/drivers/mfd/adp5585.c
@@ -0,0 +1,134 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* ADP5585 IO Expander, Key controller core driver.
+ *
+ * Copyright 2024 NXP
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/adp5585.h>
+
+static const struct mfd_cell adp5585_devs[] = {
+ {
+ .name = "adp5585-gpio",
+ .of_compatible = "adp5585-gpio",
+ },
+ {
+ .name = "adp5585-pwm",
+ .of_compatible = "adp5585-pwm",
+ },
+};
+
+static int adp5585_i2c_read_reg(struct adp5585_dev *adp5585, u8 reg, u8 *val)
+{
+ struct i2c_client *i2c = adp5585->i2c_client;
+ struct i2c_msg xfer[2];
+ int ret;
+
+ /* Write register */
+ xfer[0].addr = i2c->addr;
+ xfer[0].flags = 0;
+ xfer[0].len = 1;
+ xfer[0].buf = &reg;
+
+ /* Read data */
+ xfer[1].addr = i2c->addr;
+ xfer[1].flags = I2C_M_RD;
+ xfer[1].len = 1;
+ xfer[1].buf = val;
+
+ ret = i2c_transfer(i2c->adapter, xfer, 2);
+ if (ret == 2)
+ return 0;
+
+ dev_err(&i2c->dev, "Failed to read reg 0x%02x, ret is %d\n", reg, ret);
+
+ return ret >= 0 ? -EIO : ret;
+}
+
+static int adp5585_i2c_write_reg(struct adp5585_dev *adp5585, u8 reg, u8 val)
+{
+ struct i2c_client *i2c = adp5585->i2c_client;
+ u8 msg[2];
+ int ret;
+
+ msg[0] = reg;
+ msg[1] = val;
+ ret = i2c_master_send(i2c, msg, 2);
+ if (ret == 2)
+ return 0;
+
+ dev_err(&i2c->dev, "Failed to write reg 0x%02x, ret is %d\n", reg, ret);
+
+ return ret >= 0 ? -EIO : ret;
+}
+
+static int adp5585_i2c_probe(struct i2c_client *i2c)
+{
+ struct adp5585_dev *adp;
+ u8 reg;
+ int ret;
+
+ adp = devm_kzalloc(&i2c->dev, sizeof(struct adp5585_dev), GFP_KERNEL);
+ if (!adp)
+ return -ENOMEM;
+
+ i2c_set_clientdata(i2c, adp);
+ adp->dev = &i2c->dev;
+ adp->i2c_client = i2c;
+ adp->read_reg = adp5585_i2c_read_reg;
+ adp->write_reg = adp5585_i2c_write_reg;
+
+ ret = adp5585_i2c_read_reg(adp, ADP5585_ID, &reg);
+ if (ret)
+ return ret;
+
+ return devm_mfd_add_devices(adp->dev, PLATFORM_DEVID_AUTO,
+ adp5585_devs, ARRAY_SIZE(adp5585_devs),
+ NULL, 0, NULL);
+}
+
+static const struct i2c_device_id adp5585_i2c_id[] = {
+ { "adp5585", 0 },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(i2c, adp5585_i2c_id);
+
+static const struct of_device_id adp5585_of_match[] = {
+ {.compatible = "adi,adp5585", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, adp5585_of_match);
+
+static struct i2c_driver adp5585_i2c_driver = {
+ .driver = {
+ .name = "adp5585",
+ .of_match_table = of_match_ptr(adp5585_of_match),
+ },
+ .probe = adp5585_i2c_probe,
+ .id_table = adp5585_i2c_id,
+};
+
+static int __init adp5585_i2c_init(void)
+{
+ return i2c_add_driver(&adp5585_i2c_driver);
+}
+
+/* init early so consumer devices can complete system boot */
+subsys_initcall(adp5585_i2c_init);
+
+static void __exit adp5585_i2c_exit(void)
+{
+ i2c_del_driver(&adp5585_i2c_driver);
+}
+module_exit(adp5585_i2c_exit);
+
+MODULE_DESCRIPTION("ADP5585 core driver");
+MODULE_AUTHOR("Haibo Chen <haibo.chen@xxxxxxx>");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/adp5585.h b/include/linux/mfd/adp5585.h
new file mode 100644
index 0000000000000..58a9f84c9a75a
--- /dev/null
+++ b/include/linux/mfd/adp5585.h
@@ -0,0 +1,100 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Analog Devices ADP5585 I/O Expander, keypad controller,
+ * PWM contorller.
+ *
+ * Copyright 2022 NXP
+ */
+
+#ifndef __ADP5585_H_
+#define __ADP5585_H_
+
+#define ADP5585_ID 0x00
+#define ADP5585_INT_STATUS 0x01
+#define ADP5585_STATUS 0x02
+#define ADP5585_FIFO_1 0x03
+#define ADP5585_FIFO_2 0x04
+#define ADP5585_FIFO_3 0x05
+#define ADP5585_FIFO_4 0x06
+#define ADP5585_FIFO_5 0x07
+#define ADP5585_FIFO_6 0x08
+#define ADP5585_FIFO_7 0x09
+#define ADP5585_FIFO_8 0x0A
+#define ADP5585_FIFO_9 0x0B
+#define ADP5585_FIFO_10 0x0C
+#define ADP5585_FIFO_11 0x0D
+#define ADP5585_FIFO_12 0x0E
+#define ADP5585_FIFO_13 0x0F
+#define ADP5585_FIFO_14 0x10
+#define ADP5585_FIFO_15 0x11
+#define ADP5585_FIFO_16 0x12
+#define ADP5585_GPI_INT_STAT_A 0x13
+#define ADP5585_GPI_INT_STAT_B 0x14
+#define ADP5585_GPI_STATUS_A 0x15
+#define ADP5585_GPI_STATUS_B 0x16
+#define ADP5585_RPULL_CONFIG_A 0x17
+#define ADP5585_RPULL_CONFIG_B 0x18
+#define ADP5585_RPULL_CONFIG_C 0x19
+#define ADP5585_RPULL_CONFIG_D 0x1A
+#define ADP5585_GPI_INT_LEVEL_A 0x1B
+#define ADP5585_GPI_INT_LEVEL_B 0x1C
+#define ADP5585_GPI_EVENT_EN_A 0x1D
+#define ADP5585_GPI_EVENT_EN_B 0x1E
+#define ADP5585_GPI_INTERRUPT_EN_A 0x1F
+#define ADP5585_GPI_INTERRUPT_EN_B 0x20
+#define ADP5585_DEBOUNCE_DIS_A 0x21
+#define ADP5585_DEBOUNCE_DIS_B 0x22
+#define ADP5585_GPO_DATA_OUT_A 0x23
+#define ADP5585_GPO_DATA_OUT_B 0x24
+#define ADP5585_GPO_OUT_MODE_A 0x25
+#define ADP5585_GPO_OUT_MODE_B 0x26
+#define ADP5585_GPIO_DIRECTION_A 0x27
+#define ADP5585_GPIO_DIRECTION_B 0x28
+#define ADP5585_RESET1_EVENT_A 0x29
+#define ADP5585_RESET1_EVENT_B 0x2A
+#define ADP5585_RESET1_EVENT_C 0x2B
+#define ADP5585_RESET2_EVENT_A 0x2C
+#define ADP5585_RESET2_EVENT_B 0x2D
+#define ADP5585_RESET_CFG 0x2E
+#define ADP5585_PWM_OFFT_LOW 0x2F
+#define ADP5585_PWM_OFFT_HIGH 0x30
+#define ADP5585_PWM_ONT_LOW 0x31
+#define ADP5585_PWM_ONT_HIGH 0x32
+#define ADP5585_PWM_CFG 0x33
+#define ADP5585_LOGIC_CFG 0x34
+#define ADP5585_LOGIC_FF_CFG 0x35
+#define ADP5585_LOGIC_INT_EVENT_EN 0x36
+#define ADP5585_POLL_PTIME_CFG 0x37
+#define ADP5585_PIN_CONFIG_A 0x38
+#define ADP5585_PIN_CONFIG_B 0x39
+#define ADP5585_PIN_CONFIG_C 0x3A
+#define ADP5585_GENERAL_CFG 0x3B
+#define ADP5585_INT_EN 0x3C
+
+/* ID Register */
+#define ADP5585_DEVICE_ID_MASK 0xF
+#define ADP5585_MAN_ID_MASK 0xF
+#define ADP5585_MAN_ID_SHIFT 4
+#define ADP5585_MAN_ID 0x02
+
+#define ADP5585_PWM_CFG_EN 0x1
+#define ADP5585_PWM_CFG_MODE 0x2
+#define ADP5585_PIN_CONFIG_R3_PWM 0x8
+#define ADP5585_PIN_CONFIG_R3_MASK 0xC
+#define ADP5585_GENERAL_CFG_OSC_EN 0x80
+
+#define ADP5585_REG_MASK 0xFF
+
+#define ADP5585_BANK(offs) ((offs) > 4)
+#define ADP5585_BIT(offs) ((offs) > 4 ? \
+ 1u << ((offs) - 5) : 1u << (offs))
+
+struct adp5585_dev {
+ struct device *dev;
+ struct i2c_client *i2c_client;
+
+ int (*read_reg)(struct adp5585_dev *adp5585, u8 reg, u8 *val);
+ int (*write_reg)(struct adp5585_dev *adp5585, u8 reg, u8 val);
+};
+
+#endif

--
2.34.1