DA9052 PMIC has 16 bit GPIO bus for peripheral control.
This patch add support for the GPIO pins on the DA9052.
Signed-off-by: David Dajun Chen dchen@diasemi.com Signed-off-by: Ashish Jangam ashish.jangam@kpitcummins.com CC: Arnd Bergmann arnd@arndb.de CC: Mark Brown broonie@opensource.wolfsonmicro.com --- Changes since v3: - Remove da9052 gpio header file
Changes since v2: - change of file name - correct reference to irq_base in function to_irq() - remove pdata dependency --- drivers/gpio/Kconfig | 6 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-da9052.c | 279 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 286 insertions(+), 0 deletions(-) create mode 100755 drivers/gpio/gpio-da9052.c diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index d3b2953..df510d4 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -65,6 +65,12 @@ config GPIO_SYSFS
# put expanders in the right section, in alphabetical order
+config GPIO_DA9052 + tristate "Dialog DA9052 GPIO" + depends on PMIC_DA9052 + help + Say yes here to enable the GPIO driver for the DA9052 chip. + config GPIO_MAX730X tristate
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index becef59..cbee503 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -11,6 +11,7 @@ obj-$(CONFIG_GPIOLIB) += gpiolib.o obj-$(CONFIG_GPIO_ADP5520) += adp5520-gpio.o obj-$(CONFIG_GPIO_ADP5588) += adp5588-gpio.o obj-$(CONFIG_GPIO_BASIC_MMIO) += basic_mmio_gpio.o +obj-$(CONFIG_GPIO_DA9052) += gpio-da9052.o obj-$(CONFIG_GPIO_LANGWELL) += langwell_gpio.o obj-$(CONFIG_GPIO_MAX730X) += max730x.o obj-$(CONFIG_GPIO_MAX7300) += max7300.o diff --git a/drivers/gpio/gpio-da9052.c b/drivers/gpio/gpio-da9052.c new file mode 100755 index 0000000..5623369 --- /dev/null +++ b/drivers/gpio/gpio-da9052.c @@ -0,0 +1,279 @@ +/* + * GPIO Driver for Dialog DA9052 PMICs. + * + * Copyright(c) 2011 Dialog Semiconductor Ltd. + * + * Author: David Dajun Chen dchen@diasemi.com + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + */ +#include <linux/module.h> +#include <linux/fs.h> +#include <linux/uaccess.h> +#include <linux/platform_device.h> +#include <linux/gpio.h> +#include <linux/syscalls.h> +#include <linux/seq_file.h> + +#include <linux/mfd/da9052/da9052.h> +#include <linux/mfd/da9052/reg.h> +#include <linux/mfd/da9052/pdata.h> +#include <linux/mfd/da9052/gpio.h> + +#define DA9052_INPUT 1 +#define DA9052_OUTPUT_OPENDRAIN 2 +#define DA9052_OUTPUT_PUSHPULL 3 + +#define DA9052_SUPPLY_VDD_IO1 0 + +#define DA9052_DEBOUNCING_OFF 0 +#define DA9052_DEBOUNCING_ON 1 + +#define DA9052_OUTPUT_LOWLEVEL 0 + +#define DA9052_ACTIVE_LOW 0 +#define DA9052_ACTIVE_HIGH 1 + +#define DA9052_GPIO_MAX_PORTS_PER_REGISTER 8 +#define DA9052_GPIO_SHIFT_COUNT(no) (no%8) +#define DA9052_GPIO_MASK_UPPER_NIBBLE 0xF0 +#define DA9052_GPIO_MASK_LOWER_NIBBLE 0x0F +#define DA9052_GPIO_NIBBLE_SHIFT 4 + +struct da9052_gpio { + struct da9052 *da9052; + struct gpio_chip gp; +}; + +static inline struct da9052_gpio *to_da9052_gpio(struct gpio_chip *chip) +{ + return container_of(chip, struct da9052_gpio, gp); +} + +static unsigned char da9052_gpio_port_odd(unsigned offset) +{ + return offset % 2; +} + +static int da9052_gpio_get(struct gpio_chip *gc, unsigned offset) +{ + struct da9052_gpio *gpio = to_da9052_gpio(gc); + int da9052_port_direction = 0; + int ret; + + ret = da9052_reg_read(gpio->da9052, + DA9052_GPIO_0_1_REG + (offset >> 1)); + if (ret < 0) + return ret; + + if (da9052_gpio_port_odd(offset)) { + da9052_port_direction = ret & DA9052_GPIO_ODD_PORT_PIN; + da9052_port_direction >>= 4; + } else { + da9052_port_direction = ret & DA9052_GPIO_EVEN_PORT_PIN; + } + + switch (da9052_port_direction) { + case DA9052_INPUT: + if (offset < DA9052_GPIO_MAX_PORTS_PER_REGISTER) + ret = da9052_reg_read(gpio->da9052, + DA9052_STATUS_C_REG); + else + ret = da9052_reg_read(gpio->da9052, + DA9052_STATUS_D_REG); + if (ret < 0) + return ret; + if (ret & (1 << DA9052_GPIO_SHIFT_COUNT(offset))) + return 1; + else + return 0; + case DA9052_OUTPUT_PUSHPULL: + if (da9052_gpio_port_odd(offset)) + return ret & DA9052_GPIO_ODD_PORT_MODE; + else + return ret & DA9052_GPIO_EVEN_PORT_MODE; + default: + return -EINVAL; + } +} + +static void da9052_gpio_set(struct gpio_chip *gc, unsigned offset, int value) +{ + struct da9052_gpio *gpio = to_da9052_gpio(gc); + unsigned char register_value = 0; + int ret; + + if (da9052_gpio_port_odd(offset)) { + if (value) { + register_value = DA9052_GPIO_ODD_PORT_MODE; + ret = da9052_reg_update(gpio->da9052, (offset >> 1) + + DA9052_GPIO_0_1_REG, + DA9052_GPIO_ODD_PORT_MODE, + register_value); + if (ret != 0) + dev_err(gpio->da9052->dev, + "Failed to updated gpio odd reg,%d", + ret); + } + } else { + if (value) { + register_value = DA9052_GPIO_EVEN_PORT_MODE; + ret = da9052_reg_update(gpio->da9052, (offset >> 1) + + DA9052_GPIO_0_1_REG, + DA9052_GPIO_EVEN_PORT_MODE, + register_value); + if (ret != 0) + dev_err(gpio->da9052->dev, + "Failed to updated gpio even reg,%d", + ret); + } + } +} + +static int da9052_gpio_direction_input(struct gpio_chip *gc, unsigned offset) +{ + struct da9052_gpio *gpio = to_da9052_gpio(gc); + unsigned char register_value; + int ret; + + /* Format: function - 2 bits type - 1 bit mode - 1 bit */ + register_value = DA9052_INPUT | DA9052_ACTIVE_LOW << 2 | + DA9052_DEBOUNCING_ON << 3; + + if (da9052_gpio_port_odd(offset)) + ret = da9052_reg_update(gpio->da9052, (offset >> 1) + + DA9052_GPIO_0_1_REG, + DA9052_GPIO_MASK_UPPER_NIBBLE, + (register_value << + DA9052_GPIO_NIBBLE_SHIFT)); + else + ret = da9052_reg_update(gpio->da9052, (offset >> 1) + + DA9052_GPIO_0_1_REG, + DA9052_GPIO_MASK_LOWER_NIBBLE, + register_value); + + return ret; +} + +static int da9052_gpio_direction_output(struct gpio_chip *gc, + unsigned offset, int value) +{ + struct da9052_gpio *gpio = to_da9052_gpio(gc); + unsigned char register_value; + int ret; + + /* Format: Function - 2 bits Type - 1 bit Mode - 1 bit */ + register_value = DA9052_OUTPUT_PUSHPULL | DA9052_SUPPLY_VDD_IO1 << 2 | + value << 3; + + if (da9052_gpio_port_odd(offset)) + ret = da9052_reg_update(gpio->da9052, (offset >> 1) + + DA9052_GPIO_0_1_REG, + DA9052_GPIO_MASK_UPPER_NIBBLE, + (register_value << + DA9052_GPIO_NIBBLE_SHIFT)); + else + ret = da9052_reg_update(gpio->da9052, (offset >> 1) + + DA9052_GPIO_0_1_REG, + DA9052_GPIO_MASK_LOWER_NIBBLE, + register_value); + + return ret; +} + +static int da9052_gpio_to_irq(struct gpio_chip *gc, u32 offset) +{ + struct da9052_gpio *gpio = to_da9052_gpio(gc); + struct da9052 *da9052 = gpio->da9052; + + return da9052->irq_base + DA9052_IRQ_GPI0 + offset; +} + +static struct gpio_chip reference_gp{ + .label = "da9052-gpio", + .owner = THIS_MODULE, + .get = da9052_gpio_get, + .set = da9052_gpio_set, + .direction_input = da9052_gpio_direction_input, + .direction_output = da9052_gpio_direction_output, + .to_irq = da9052_gpio_to_irq, + .can_sleep = 1; +}; + +static int __devinit da9052_gpio_probe(struct platform_device *pdev) +{ + struct da9052_gpio *gpio; + struct da9052_pdata *pdata; + int ret; + + gpio = kzalloc(sizeof(*gpio), GFP_KERNEL); + if (gpio == NULL) + return -ENOMEM; + + gpio->da9052 = dev_get_drvdata(pdev->dev.parent); + pdata = gpio->da9052->dev->platform_data; + + gpio->da9052 = dev_get_drvdata(pdev->dev.parent); + gpio->gp = reference_gp; + gpio->gp.ngpio = 16; + if (pdata && pdata->gpio_base) + gpio->gp.base = pdata->gpio_base; + else + gpio->gp.base = -1; + + ret = gpiochip_add(&gpio->gp); + if (ret < 0) { + dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret); + goto err_mem; + } + + platform_set_drvdata(pdev, gpio); + + return 0; + +err_mem: + kfree(gpio); + return ret; +} + +static int __devexit da9052_gpio_remove(struct platform_device *pdev) +{ + struct da9052_gpio *gpio = platform_get_drvdata(pdev); + int ret; + + ret = gpiochip_remove(&gpio->gp); + if (ret == 0) + kfree(gpio); + + return ret; +} + +static struct platform_driver da9052_gpio_driver = { + .probe = da9052_gpio_probe, + .remove = __devexit_p(da9052_gpio_remove), + .driver = { + .name = "da9052-gpio", + .owner = THIS_MODULE, + }, +}; + +static int __init da9052_gpio_init(void) +{ + return platform_driver_register(&da9052_gpio_driver); +} +module_init(da9052_gpio_init); + +static void __exit da9052_gpio_exit(void) +{ + return platform_driver_unregister(&da9052_gpio_driver); +} +module_exit(da9052_gpio_exit); + +MODULE_AUTHOR("David Dajun Chen dchen@diasemi.com"); +MODULE_DESCRIPTION("DA9052 GPIO Device Driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:da9052-gpio");
On Wednesday 06 July 2011, ashishj3 wrote:
l.
This patch add support for the GPIO pins on the DA9052.
Signed-off-by: David Dajun Chen dchen@diasemi.com Signed-off-by: Ashish Jangam ashish.jangam@kpitcummins.com CC: Arnd Bergmann arnd@arndb.de CC: Mark Brown broonie@opensource.wolfsonmicro.com
Acked-by: Arnd Bergmann arnd@arndb.de
On Wed, Jul 06, 2011 at 04:02:13PM +0530, ashishj3 wrote:
DA9052 PMIC has 16 bit GPIO bus for peripheral control.
This patch add support for the GPIO pins on the DA9052.
Acked-by: Mark Brown broonie@opensource.wolfsonmicro.com
On Wed, Jul 06, 2011 at 04:02:13PM +0530, ashishj3 wrote:
DA9052 PMIC has 16 bit GPIO bus for peripheral control.
This patch add support for the GPIO pins on the DA9052.
Signed-off-by: David Dajun Chen dchen@diasemi.com Signed-off-by: Ashish Jangam ashish.jangam@kpitcummins.com CC: Arnd Bergmann arnd@arndb.de CC: Mark Brown broonie@opensource.wolfsonmicro.com
Acked-by: Grant Likely grant.likely@secretlab.ca
It looks like this needs to be merged via the MFD tree since it depends on the core da9052 driver patch.
Also, comments below:
Changes since v3:
- Remove da9052 gpio header file
Changes since v2:
- change of file name
- correct reference to irq_base in function to_irq()
- remove pdata dependency
drivers/gpio/Kconfig | 6 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-da9052.c | 279 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 286 insertions(+), 0 deletions(-) create mode 100755 drivers/gpio/gpio-da9052.c diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index d3b2953..df510d4 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -65,6 +65,12 @@ config GPIO_SYSFS # put expanders in the right section, in alphabetical order +config GPIO_DA9052
- tristate "Dialog DA9052 GPIO"
- depends on PMIC_DA9052
- help
Say yes here to enable the GPIO driver for the DA9052 chip.config GPIO_MAX730X tristate diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index becef59..cbee503 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -11,6 +11,7 @@ obj-$(CONFIG_GPIOLIB) += gpiolib.o obj-$(CONFIG_GPIO_ADP5520) += adp5520-gpio.o obj-$(CONFIG_GPIO_ADP5588) += adp5588-gpio.o obj-$(CONFIG_GPIO_BASIC_MMIO) += basic_mmio_gpio.o +obj-$(CONFIG_GPIO_DA9052) += gpio-da9052.o obj-$(CONFIG_GPIO_LANGWELL) += langwell_gpio.o obj-$(CONFIG_GPIO_MAX730X) += max730x.o obj-$(CONFIG_GPIO_MAX7300) += max7300.o diff --git a/drivers/gpio/gpio-da9052.c b/drivers/gpio/gpio-da9052.c new file mode 100755 index 0000000..5623369 --- /dev/null +++ b/drivers/gpio/gpio-da9052.c @@ -0,0 +1,279 @@ +/*
- GPIO Driver for Dialog DA9052 PMICs.
- Copyright(c) 2011 Dialog Semiconductor Ltd.
- Author: David Dajun Chen dchen@diasemi.com
- This program is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; either version 2 of the License, or (at your
- option) any later version.
- */
+#include <linux/module.h> +#include <linux/fs.h> +#include <linux/uaccess.h> +#include <linux/platform_device.h> +#include <linux/gpio.h> +#include <linux/syscalls.h> +#include <linux/seq_file.h>
+#include <linux/mfd/da9052/da9052.h> +#include <linux/mfd/da9052/reg.h> +#include <linux/mfd/da9052/pdata.h> +#include <linux/mfd/da9052/gpio.h>
+#define DA9052_INPUT 1 +#define DA9052_OUTPUT_OPENDRAIN 2 +#define DA9052_OUTPUT_PUSHPULL 3
+#define DA9052_SUPPLY_VDD_IO1 0
+#define DA9052_DEBOUNCING_OFF 0 +#define DA9052_DEBOUNCING_ON 1
+#define DA9052_OUTPUT_LOWLEVEL 0
+#define DA9052_ACTIVE_LOW 0 +#define DA9052_ACTIVE_HIGH 1
+#define DA9052_GPIO_MAX_PORTS_PER_REGISTER 8 +#define DA9052_GPIO_SHIFT_COUNT(no) (no%8) +#define DA9052_GPIO_MASK_UPPER_NIBBLE 0xF0 +#define DA9052_GPIO_MASK_LOWER_NIBBLE 0x0F +#define DA9052_GPIO_NIBBLE_SHIFT 4
+struct da9052_gpio {
- struct da9052 *da9052;
- struct gpio_chip gp;
+};
+static inline struct da9052_gpio *to_da9052_gpio(struct gpio_chip *chip) +{
- return container_of(chip, struct da9052_gpio, gp);
+}
+static unsigned char da9052_gpio_port_odd(unsigned offset) +{
- return offset % 2;
+}
+static int da9052_gpio_get(struct gpio_chip *gc, unsigned offset) +{
- struct da9052_gpio *gpio = to_da9052_gpio(gc);
- int da9052_port_direction = 0;
- int ret;
- ret = da9052_reg_read(gpio->da9052,
DA9052_GPIO_0_1_REG + (offset >> 1));- if (ret < 0)
return ret;- if (da9052_gpio_port_odd(offset)) {
da9052_port_direction = ret & DA9052_GPIO_ODD_PORT_PIN;da9052_port_direction >>= 4;- } else {
da9052_port_direction = ret & DA9052_GPIO_EVEN_PORT_PIN;- }
- switch (da9052_port_direction) {
- case DA9052_INPUT:
if (offset < DA9052_GPIO_MAX_PORTS_PER_REGISTER)ret = da9052_reg_read(gpio->da9052,DA9052_STATUS_C_REG);elseret = da9052_reg_read(gpio->da9052,DA9052_STATUS_D_REG);if (ret < 0)return ret;if (ret & (1 << DA9052_GPIO_SHIFT_COUNT(offset)))return 1;elsereturn 0;- case DA9052_OUTPUT_PUSHPULL:
if (da9052_gpio_port_odd(offset))return ret & DA9052_GPIO_ODD_PORT_MODE;elsereturn ret & DA9052_GPIO_EVEN_PORT_MODE;- default:
return -EINVAL;- }
+}
+static void da9052_gpio_set(struct gpio_chip *gc, unsigned offset, int value) +{
- struct da9052_gpio *gpio = to_da9052_gpio(gc);
- unsigned char register_value = 0;
- int ret;
- if (da9052_gpio_port_odd(offset)) {
if (value) {register_value = DA9052_GPIO_ODD_PORT_MODE;ret = da9052_reg_update(gpio->da9052, (offset >> 1) +DA9052_GPIO_0_1_REG,DA9052_GPIO_ODD_PORT_MODE,register_value);if (ret != 0)dev_err(gpio->da9052->dev,"Failed to updated gpio odd reg,%d",ret);}- } else {
if (value) {register_value = DA9052_GPIO_EVEN_PORT_MODE;ret = da9052_reg_update(gpio->da9052, (offset >> 1) +DA9052_GPIO_0_1_REG,DA9052_GPIO_EVEN_PORT_MODE,register_value);if (ret != 0)dev_err(gpio->da9052->dev,"Failed to updated gpio even reg,%d",ret);}- }
+}
+static int da9052_gpio_direction_input(struct gpio_chip *gc, unsigned offset) +{
- struct da9052_gpio *gpio = to_da9052_gpio(gc);
- unsigned char register_value;
- int ret;
- /* Format: function - 2 bits type - 1 bit mode - 1 bit */
- register_value = DA9052_INPUT | DA9052_ACTIVE_LOW << 2 |
DA9052_DEBOUNCING_ON << 3;- if (da9052_gpio_port_odd(offset))
ret = da9052_reg_update(gpio->da9052, (offset >> 1) +DA9052_GPIO_0_1_REG,DA9052_GPIO_MASK_UPPER_NIBBLE,(register_value <<DA9052_GPIO_NIBBLE_SHIFT));- else
ret = da9052_reg_update(gpio->da9052, (offset >> 1) +DA9052_GPIO_0_1_REG,DA9052_GPIO_MASK_LOWER_NIBBLE,register_value);- return ret;
+}
+static int da9052_gpio_direction_output(struct gpio_chip *gc,
unsigned offset, int value)+{
- struct da9052_gpio *gpio = to_da9052_gpio(gc);
- unsigned char register_value;
- int ret;
- /* Format: Function - 2 bits Type - 1 bit Mode - 1 bit */
- register_value = DA9052_OUTPUT_PUSHPULL | DA9052_SUPPLY_VDD_IO1 << 2 |
value << 3;- if (da9052_gpio_port_odd(offset))
ret = da9052_reg_update(gpio->da9052, (offset >> 1) +DA9052_GPIO_0_1_REG,DA9052_GPIO_MASK_UPPER_NIBBLE,(register_value <<DA9052_GPIO_NIBBLE_SHIFT));- else
ret = da9052_reg_update(gpio->da9052, (offset >> 1) +DA9052_GPIO_0_1_REG,DA9052_GPIO_MASK_LOWER_NIBBLE,register_value);- return ret;
+}
+static int da9052_gpio_to_irq(struct gpio_chip *gc, u32 offset) +{
- struct da9052_gpio *gpio = to_da9052_gpio(gc);
- struct da9052 *da9052 = gpio->da9052;
- return da9052->irq_base + DA9052_IRQ_GPI0 + offset;
Who allocates the irq_descs for these irqs?
+}
+static struct gpio_chip reference_gp{
static struct gpio_chip reference_gp __devinitdata = {
- .label = "da9052-gpio",
- .owner = THIS_MODULE,
- .get = da9052_gpio_get,
- .set = da9052_gpio_set,
- .direction_input = da9052_gpio_direction_input,
- .direction_output = da9052_gpio_direction_output,
- .to_irq = da9052_gpio_to_irq,
- .can_sleep = 1;
Nitpick: I prefer the form (single space instead of tabs before the '=') .label = "da9052-gpio",
+};
+static int __devinit da9052_gpio_probe(struct platform_device *pdev) +{
- struct da9052_gpio *gpio;
- struct da9052_pdata *pdata;
- int ret;
- gpio = kzalloc(sizeof(*gpio), GFP_KERNEL);
- if (gpio == NULL)
return -ENOMEM;- gpio->da9052 = dev_get_drvdata(pdev->dev.parent);
- pdata = gpio->da9052->dev->platform_data;
- gpio->da9052 = dev_get_drvdata(pdev->dev.parent);
- gpio->gp = reference_gp;
- gpio->gp.ngpio = 16;
- if (pdata && pdata->gpio_base)
gpio->gp.base = pdata->gpio_base;- else
gpio->gp.base = -1;
Why not put the default values of .ngpio = 16 and .base = -1 into the reference_gp?
- ret = gpiochip_add(&gpio->gp);
- if (ret < 0) {
dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);goto err_mem;- }
- platform_set_drvdata(pdev, gpio);
- return 0;
+err_mem:
- kfree(gpio);
- return ret;
+}
+static int __devexit da9052_gpio_remove(struct platform_device *pdev) +{
- struct da9052_gpio *gpio = platform_get_drvdata(pdev);
- int ret;
- ret = gpiochip_remove(&gpio->gp);
- if (ret == 0)
kfree(gpio);- return ret;
+}
+static struct platform_driver da9052_gpio_driver = {
- .probe = da9052_gpio_probe,
- .remove = __devexit_p(da9052_gpio_remove),
- .driver = {
.name = "da9052-gpio",.owner = THIS_MODULE,- },
+};
+static int __init da9052_gpio_init(void) +{
- return platform_driver_register(&da9052_gpio_driver);
+} +module_init(da9052_gpio_init);
+static void __exit da9052_gpio_exit(void) +{
- return platform_driver_unregister(&da9052_gpio_driver);
+} +module_exit(da9052_gpio_exit);
+MODULE_AUTHOR("David Dajun Chen dchen@diasemi.com"); +MODULE_DESCRIPTION("DA9052 GPIO Device Driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:da9052-gpio");
On Wed, Jul 06, 2011 at 10:36:56AM -0600, Grant Likely wrote:
It looks like this needs to be merged via the MFD tree since it depends on the core da9052 driver patch.
Actually that's not such an issue for new MFDs - since the function drivers all depend on the core driver they can't be enabled in Kconfig until the MFD part has been merged so don't do any harm.
+static int da9052_gpio_to_irq(struct gpio_chip *gc, u32 offset) +{
- struct da9052_gpio *gpio = to_da9052_gpio(gc);
- struct da9052 *da9052 = gpio->da9052;
- return da9052->irq_base + DA9052_IRQ_GPI0 + offset;
Who allocates the irq_descs for these irqs?
SoP for MFDs is to do this in the core as part of the larger block of interrupts, the core driver is doing this.
-
Arnd Bergmann -
ashishj3 -
Grant Likely -
Mark Brown