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Subject[PATCH] qcom: ssbi-gpio: convert to hierarchical IRQ helpers in gpio core
Date
Now that the GPIO core has support for hierarchical IRQ chips, convert
Qualcomm's ssbi-gpio over to use these new helpers to reduce duplicated
code across drivers.

Signed-off-by: Brian Masney <masneyb@onstation.org>
---
Linus: I've only compile tested this driver. Hopefully you have time to
test this on your DragonBoard.

drivers/pinctrl/qcom/Kconfig | 1 +
drivers/pinctrl/qcom/pinctrl-ssbi-gpio.c | 121 +++++++----------------
2 files changed, 34 insertions(+), 88 deletions(-)

diff --git a/drivers/pinctrl/qcom/Kconfig b/drivers/pinctrl/qcom/Kconfig
index 32fc2458b8eb..41fab621de1b 100644
--- a/drivers/pinctrl/qcom/Kconfig
+++ b/drivers/pinctrl/qcom/Kconfig
@@ -152,6 +152,7 @@ config PINCTRL_QCOM_SSBI_PMIC
select PINMUX
select PINCONF
select GENERIC_PINCONF
+ select GPIOLIB_IRQCHIP
select IRQ_DOMAIN_HIERARCHY
help
This is the pinctrl, pinmux, pinconf and gpiolib driver for the
diff --git a/drivers/pinctrl/qcom/pinctrl-ssbi-gpio.c b/drivers/pinctrl/qcom/pinctrl-ssbi-gpio.c
index c1f7d0799ebe..dca86886b1f9 100644
--- a/drivers/pinctrl/qcom/pinctrl-ssbi-gpio.c
+++ b/drivers/pinctrl/qcom/pinctrl-ssbi-gpio.c
@@ -56,7 +56,6 @@
/**
* struct pm8xxx_pin_data - dynamic configuration for a pin
* @reg: address of the control register
- * @irq: IRQ from the PMIC interrupt controller
* @power_source: logical selected voltage source, mapping in static data
* is used translate to register values
* @mode: operating mode for the pin (input/output)
@@ -72,7 +71,6 @@
*/
struct pm8xxx_pin_data {
unsigned reg;
- int irq;
u8 power_source;
u8 mode;
bool open_drain;
@@ -93,9 +91,6 @@ struct pm8xxx_gpio {

struct pinctrl_desc desc;
unsigned npins;
-
- struct fwnode_handle *fwnode;
- struct irq_domain *domain;
};

static const struct pinconf_generic_params pm8xxx_gpio_bindings[] = {
@@ -491,13 +486,16 @@ static int pm8xxx_gpio_get(struct gpio_chip *chip, unsigned offset)
{
struct pm8xxx_gpio *pctrl = gpiochip_get_data(chip);
struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
+ int ret, irq;
bool state;
- int ret;

- if (pin->mode == PM8XXX_GPIO_MODE_OUTPUT) {
- ret = pin->output_value;
- } else if (pin->irq >= 0) {
- ret = irq_get_irqchip_state(pin->irq, IRQCHIP_STATE_LINE_LEVEL, &state);
+ if (pin->mode == PM8XXX_GPIO_MODE_OUTPUT)
+ return pin->output_value;
+
+ irq = chip->to_irq(chip, offset);
+ if (irq >= 0) {
+ ret = irq_get_irqchip_state(irq, IRQCHIP_STATE_LINE_LEVEL,
+ &state);
if (!ret)
ret = !!state;
} else
@@ -535,37 +533,6 @@ static int pm8xxx_gpio_of_xlate(struct gpio_chip *chip,
}


-static int pm8xxx_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
-{
- struct pm8xxx_gpio *pctrl = gpiochip_get_data(chip);
- struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
- struct irq_fwspec fwspec;
- int ret;
-
- fwspec.fwnode = pctrl->fwnode;
- fwspec.param_count = 2;
- fwspec.param[0] = offset + PM8XXX_GPIO_PHYSICAL_OFFSET;
- fwspec.param[1] = IRQ_TYPE_EDGE_RISING;
-
- ret = irq_create_fwspec_mapping(&fwspec);
-
- /*
- * Cache the IRQ since pm8xxx_gpio_get() needs this to get determine the
- * line level.
- */
- pin->irq = ret;
-
- return ret;
-}
-
-static void pm8xxx_gpio_free(struct gpio_chip *chip, unsigned int offset)
-{
- struct pm8xxx_gpio *pctrl = gpiochip_get_data(chip);
- struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
-
- pin->irq = -1;
-}
-
#ifdef CONFIG_DEBUG_FS
#include <linux/seq_file.h>

@@ -624,13 +591,11 @@ static void pm8xxx_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
#endif

static const struct gpio_chip pm8xxx_gpio_template = {
- .free = pm8xxx_gpio_free,
.direction_input = pm8xxx_gpio_direction_input,
.direction_output = pm8xxx_gpio_direction_output,
.get = pm8xxx_gpio_get,
.set = pm8xxx_gpio_set,
.of_xlate = pm8xxx_gpio_of_xlate,
- .to_irq = pm8xxx_gpio_to_irq,
.dbg_show = pm8xxx_gpio_dbg_show,
.owner = THIS_MODULE,
};
@@ -712,43 +677,24 @@ static int pm8xxx_domain_translate(struct irq_domain *domain,
return 0;
}

-static int pm8xxx_domain_alloc(struct irq_domain *domain, unsigned int virq,
- unsigned int nr_irqs, void *data)
+static unsigned int pm8xxx_child_offset_to_irq(struct gpio_chip *chip,
+ unsigned int offset)
{
- struct pm8xxx_gpio *pctrl = container_of(domain->host_data,
- struct pm8xxx_gpio, chip);
- struct irq_fwspec *fwspec = data;
- struct irq_fwspec parent_fwspec;
- irq_hw_number_t hwirq;
- unsigned int type;
- int ret, i;
-
- ret = pm8xxx_domain_translate(domain, fwspec, &hwirq, &type);
- if (ret)
- return ret;
-
- for (i = 0; i < nr_irqs; i++)
- irq_domain_set_info(domain, virq + i, hwirq + i,
- &pm8xxx_irq_chip, pctrl, handle_level_irq,
- NULL, NULL);
+ return offset + PM8XXX_GPIO_PHYSICAL_OFFSET;
+}

- parent_fwspec.fwnode = domain->parent->fwnode;
- parent_fwspec.param_count = 2;
- parent_fwspec.param[0] = hwirq + 0xc0;
- parent_fwspec.param[1] = fwspec->param[1];
+static int pm8xxx_child_to_parent_hwirq(struct gpio_chip *chip,
+ unsigned int child_hwirq,
+ unsigned int child_type,
+ unsigned int *parent_hwirq,
+ unsigned int *parent_type)
+{
+ *parent_hwirq = child_hwirq + 0xc0;
+ *parent_type = child_type;

- return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs,
- &parent_fwspec);
+ return 0;
}

-static const struct irq_domain_ops pm8xxx_domain_ops = {
- .activate = gpiochip_irq_domain_activate,
- .alloc = pm8xxx_domain_alloc,
- .deactivate = gpiochip_irq_domain_deactivate,
- .free = irq_domain_free_irqs_common,
- .translate = pm8xxx_domain_translate,
-};
-
static const struct of_device_id pm8xxx_gpio_of_match[] = {
{ .compatible = "qcom,pm8018-gpio", .data = (void *) 6 },
{ .compatible = "qcom,pm8038-gpio", .data = (void *) 12 },
@@ -765,6 +711,7 @@ static int pm8xxx_gpio_probe(struct platform_device *pdev)
struct irq_domain *parent_domain;
struct device_node *parent_node;
struct pinctrl_pin_desc *pins;
+ struct gpio_irq_chip *girq;
struct pm8xxx_gpio *pctrl;
int ret, i;

@@ -800,7 +747,6 @@ static int pm8xxx_gpio_probe(struct platform_device *pdev)

for (i = 0; i < pctrl->desc.npins; i++) {
pin_data[i].reg = SSBI_REG_ADDR_GPIO(i);
- pin_data[i].irq = -1;

ret = pm8xxx_pin_populate(pctrl, &pin_data[i]);
if (ret)
@@ -841,19 +787,21 @@ static int pm8xxx_gpio_probe(struct platform_device *pdev)
if (!parent_domain)
return -ENXIO;

- pctrl->fwnode = of_node_to_fwnode(pctrl->dev->of_node);
- pctrl->domain = irq_domain_create_hierarchy(parent_domain, 0,
- pctrl->chip.ngpio,
- pctrl->fwnode,
- &pm8xxx_domain_ops,
- &pctrl->chip);
- if (!pctrl->domain)
- return -ENODEV;
+ girq = &pctrl->chip.irq;
+ girq->chip = &pm8xxx_irq_chip;
+ girq->default_type = IRQ_TYPE_NONE;
+ girq->handler = handle_level_irq;
+ girq->fwnode = of_node_to_fwnode(pctrl->dev->of_node);
+ girq->parent_domain = parent_domain;
+ girq->child_to_parent_hwirq = pm8xxx_child_to_parent_hwirq;
+ girq->populate_parent_fwspec = gpiochip_populate_parent_fwspec_fourcell;
+ girq->child_offset_to_irq = pm8xxx_child_offset_to_irq;
+ girq->child_irq_domain_ops.translate = pm8xxx_domain_translate;

ret = gpiochip_add_data(&pctrl->chip, pctrl);
if (ret) {
dev_err(&pdev->dev, "failed register gpiochip\n");
- goto err_chip_add_data;
+ return ret;
}

/*
@@ -883,8 +831,6 @@ static int pm8xxx_gpio_probe(struct platform_device *pdev)

unregister_gpiochip:
gpiochip_remove(&pctrl->chip);
-err_chip_add_data:
- irq_domain_remove(pctrl->domain);

return ret;
}
@@ -894,7 +840,6 @@ static int pm8xxx_gpio_remove(struct platform_device *pdev)
struct pm8xxx_gpio *pctrl = platform_get_drvdata(pdev);

gpiochip_remove(&pctrl->chip);
- irq_domain_remove(pctrl->domain);

return 0;
}
--
2.21.0
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