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Message-Id: <20240716-adi-v1-3-79c0122986e7@nxp.com>
Date: Tue, 16 Jul 2024 15:28:26 -0400
From: Frank Li <Frank.Li@....com>
To: Lee Jones <lee@...nel.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Linus Walleij <linus.walleij@...aro.org>,
Bartosz Golaszewski <brgl@...ev.pl>,
Uwe Kleine-König <ukleinek@...nel.org>,
Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Fabio Estevam <festevam@...il.com>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-gpio@...r.kernel.org, linux-pwm@...r.kernel.org, imx@...ts.linux.dev,
linux-arm-kernel@...ts.infradead.org, Frank Li <Frank.Li@....com>,
Haibo Chen <haibo.chen@....com>, Jun Li <jun.li@....com>
Subject: [PATCH 3/6] gpio: adp5585-gpio: add adp5585-gpio support
From: Haibo Chen <haibo.chen@....com>
Add gpio function support for MFD adp5585.
Signed-off-by: Haibo Chen <haibo.chen@....com>
Reviewed-by: Jun Li <jun.li@....com>
Signed-off-by: Frank Li <Frank.Li@....com>
---
drivers/gpio/Kconfig | 7 ++
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-adp5585.c | 184 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 192 insertions(+)
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 58f43bcced7c1..20daa3d70abc7 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -1233,6 +1233,13 @@ config GPIO_ADP5520
This option enables support for on-chip GPIO found
on Analog Devices ADP5520 PMICs.
+config GPIO_ADP5585
+ tristate "GPIO Support for ADP5585"
+ depends on MFD_ADP5585
+ help
+ This option enables support for on-chip GPIO found on Analog
+ devices ADP5585.
+
config GPIO_ALTERA_A10SR
tristate "Altera Arria10 System Resource GPIO"
depends on MFD_ALTERA_A10SR
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 64dd6d9d730d5..1429e8c0229b9 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -26,6 +26,7 @@ obj-$(CONFIG_GPIO_74X164) += gpio-74x164.o
obj-$(CONFIG_GPIO_74XX_MMIO) += gpio-74xx-mmio.o
obj-$(CONFIG_GPIO_ADNP) += gpio-adnp.o
obj-$(CONFIG_GPIO_ADP5520) += gpio-adp5520.o
+obj-$(CONFIG_GPIO_ADP5585) += gpio-adp5585.o
obj-$(CONFIG_GPIO_AGGREGATOR) += gpio-aggregator.o
obj-$(CONFIG_GPIO_ALTERA_A10SR) += gpio-altera-a10sr.o
obj-$(CONFIG_GPIO_ALTERA) += gpio-altera.o
diff --git a/drivers/gpio/gpio-adp5585.c b/drivers/gpio/gpio-adp5585.c
new file mode 100644
index 0000000000000..7c9edbc16975b
--- /dev/null
+++ b/drivers/gpio/gpio-adp5585.c
@@ -0,0 +1,184 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * GPIO driver for Analog Devices ADP5585 MFD
+ *
+ * Copyright 2024 NXP
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/adp5585.h>
+#include <linux/gpio/driver.h>
+
+#define ADP5585_GPIO_MAX 10
+
+struct adp5585_gpio_dev {
+ struct device *parent;
+ struct gpio_chip gpio_chip;
+ struct mutex lock;
+ u8 dat_out[2];
+ u8 dir[2];
+};
+
+static int adp5585_gpio_reg_read(struct adp5585_gpio_dev *adp5585_gpio, u8 reg, u8 *val)
+{
+ struct adp5585_dev *adp5585 = dev_get_drvdata(adp5585_gpio->parent);
+
+ return adp5585->read_reg(adp5585, reg, val);
+}
+
+static int adp5585_gpio_reg_write(struct adp5585_gpio_dev *adp5585_gpio, u8 reg, u8 val)
+{
+ struct adp5585_dev *adp5585 = dev_get_drvdata(adp5585_gpio->parent);
+
+ return adp5585->write_reg(adp5585, reg, val);
+}
+
+static int adp5585_gpio_get_value(struct gpio_chip *chip, unsigned int off)
+{
+ struct adp5585_gpio_dev *adp5585_gpio;
+ unsigned int bank, bit;
+ u8 val;
+
+ adp5585_gpio = gpiochip_get_data(chip);
+ bank = ADP5585_BANK(off);
+ bit = ADP5585_BIT(off);
+
+ guard(mutex)(&adp5585_gpio->lock);
+
+ /* There are dedicated registers for GPIO IN/OUT. */
+ if (adp5585_gpio->dir[bank] & bit)
+ val = adp5585_gpio->dat_out[bank];
+ else
+ adp5585_gpio_reg_read(adp5585_gpio, ADP5585_GPI_STATUS_A + bank, &val);
+
+ return !!(val & bit);
+}
+
+static void adp5585_gpio_set_value(struct gpio_chip *chip, unsigned int off, int val)
+{
+ struct adp5585_gpio_dev *adp5585_gpio;
+ unsigned int bank, bit;
+
+ adp5585_gpio = gpiochip_get_data(chip);
+ bank = ADP5585_BANK(off);
+ bit = ADP5585_BIT(off);
+
+ guard(mutex)(&adp5585_gpio->lock);
+
+ if (val)
+ adp5585_gpio->dat_out[bank] |= bit;
+ else
+ adp5585_gpio->dat_out[bank] &= ~bit;
+
+ adp5585_gpio_reg_write(adp5585_gpio, ADP5585_GPO_DATA_OUT_A + bank,
+ adp5585_gpio->dat_out[bank]);
+}
+
+static int adp5585_gpio_direction_input(struct gpio_chip *chip, unsigned int off)
+{
+ struct adp5585_gpio_dev *adp5585_gpio;
+ unsigned int bank, bit;
+ int ret;
+
+ adp5585_gpio = gpiochip_get_data(chip);
+ bank = ADP5585_BANK(off);
+ bit = ADP5585_BIT(off);
+
+ guard(mutex)(&adp5585_gpio->lock);
+
+ adp5585_gpio->dir[bank] &= ~bit;
+ ret = adp5585_gpio_reg_write(adp5585_gpio, ADP5585_GPIO_DIRECTION_A + bank,
+ adp5585_gpio->dir[bank]);
+ return ret;
+}
+
+static int adp5585_gpio_direction_output(struct gpio_chip *chip, unsigned int off, int val)
+{
+ struct adp5585_gpio_dev *adp5585_gpio;
+ unsigned int bank, bit;
+ int ret;
+
+ adp5585_gpio = gpiochip_get_data(chip);
+ bank = ADP5585_BANK(off);
+ bit = ADP5585_BIT(off);
+
+ guard(mutex)(&adp5585_gpio->lock);
+
+ adp5585_gpio->dir[bank] |= bit;
+
+ if (val)
+ adp5585_gpio->dat_out[bank] |= bit;
+ else
+ adp5585_gpio->dat_out[bank] &= ~bit;
+
+ ret = adp5585_gpio_reg_write(adp5585_gpio, ADP5585_GPO_DATA_OUT_A + bank,
+ adp5585_gpio->dat_out[bank]);
+ ret |= adp5585_gpio_reg_write(adp5585_gpio, ADP5585_GPIO_DIRECTION_A + bank,
+ adp5585_gpio->dir[bank]);
+
+ return ret;
+}
+
+static int adp5585_gpio_probe(struct platform_device *pdev)
+{
+ struct adp5585_gpio_dev *adp5585_gpio;
+ struct device *dev = &pdev->dev;
+ struct gpio_chip *gc;
+ int i;
+
+ adp5585_gpio = devm_kzalloc(&pdev->dev, sizeof(struct adp5585_gpio_dev), GFP_KERNEL);
+ if (!adp5585_gpio)
+ return -ENOMEM;
+
+ adp5585_gpio->parent = pdev->dev.parent;
+
+ gc = &adp5585_gpio->gpio_chip;
+ gc->parent = dev;
+ gc->direction_input = adp5585_gpio_direction_input;
+ gc->direction_output = adp5585_gpio_direction_output;
+ gc->get = adp5585_gpio_get_value;
+ gc->set = adp5585_gpio_set_value;
+ gc->can_sleep = true;
+
+ gc->base = -1;
+ gc->ngpio = ADP5585_GPIO_MAX;
+ gc->label = pdev->name;
+ gc->owner = THIS_MODULE;
+
+ mutex_init(&adp5585_gpio->lock);
+
+ for (i = 0; i < 2; i++) {
+ u8 *dat_out, *dir;
+
+ dat_out = adp5585_gpio->dat_out;
+ dir = adp5585_gpio->dir;
+ adp5585_gpio_reg_read(adp5585_gpio, ADP5585_GPO_DATA_OUT_A + i, dat_out + i);
+ adp5585_gpio_reg_read(adp5585_gpio, ADP5585_GPIO_DIRECTION_A + i, dir + i);
+ }
+
+ return devm_gpiochip_add_data(&pdev->dev, &adp5585_gpio->gpio_chip, adp5585_gpio);
+}
+
+static const struct of_device_id adp5585_of_match[] = {
+ {.compatible = "adp5585-gpio", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, adp5585_of_match);
+
+static struct platform_driver adp5585_gpio_driver = {
+ .driver = {
+ .name = "adp5585-gpio",
+ .of_match_table = adp5585_of_match,
+ },
+ .probe = adp5585_gpio_probe,
+};
+
+module_platform_driver(adp5585_gpio_driver);
+
+MODULE_AUTHOR("Haibo Chen <haibo.chen@....com>");
+MODULE_DESCRIPTION("GPIO ADP5585 Driver");
+MODULE_LICENSE("GPL");
--
2.34.1
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