[PATCH 2/4] pinctrl: sirf: switch driver to use gpiolib irqchip helpers
Barry Song
21cnbao at gmail.com
Mon Apr 14 23:43:47 PDT 2014
From: Linus Walleij <linus.walleij at linaro.org>
This switches the SiRF pinctrl driver over to using the gpiolib
irqchip helpers simplifying some of the code.
Signed-off-by: Barry Song <Baohua.Song at csr.com>
---
came from Linus Walleij's patch.
drivers/pinctrl/Kconfig | 1 +
drivers/pinctrl/sirf/pinctrl-sirf.c | 89 ++++++++++------------------------
2 files changed, 27 insertions(+), 63 deletions(-)
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index e493240..ddd4e6e 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -270,6 +270,7 @@ config PINCTRL_SIRF
bool "CSR SiRFprimaII/SiRFmarco pin controller driver"
depends on ARCH_SIRF
select PINMUX
+ select GPIOLIB_IRQCHIP
config PINCTRL_SUNXI
bool
diff --git a/drivers/pinctrl/sirf/pinctrl-sirf.c b/drivers/pinctrl/sirf/pinctrl-sirf.c
index cb81b15..c03dcc7 100644
--- a/drivers/pinctrl/sirf/pinctrl-sirf.c
+++ b/drivers/pinctrl/sirf/pinctrl-sirf.c
@@ -14,8 +14,6 @@
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/err.h>
-#include <linux/irqdomain.h>
-#include <linux/irqchip/chained_irq.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/pinctrl/consumer.h>
@@ -27,7 +25,6 @@
#include <linux/bitops.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
-#include <asm/mach/irq.h>
#include "pinctrl-sirf.h"
@@ -41,7 +38,6 @@ struct sirfsoc_gpio_bank {
struct sirfsoc_gpio_chip {
struct of_mm_gpio_chip chip;
- struct irq_domain *domain;
bool is_marco; /* for marco, some registers are different with prima2 */
struct sirfsoc_gpio_bank sgpio_bank[SIRFSOC_GPIO_NO_OF_BANKS];
};
@@ -450,15 +446,11 @@ static inline struct sirfsoc_gpio_bank *sirfsoc_gpio_to_bank(unsigned int gpio)
return &sgpio_chip.sgpio_bank[gpio / SIRFSOC_GPIO_BANK_SIZE];
}
-static int sirfsoc_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
-{
- return irq_create_mapping(sgpio_chip.domain, offset);
-}
-
static inline int sirfsoc_gpio_to_bankoff(unsigned int gpio)
{
return gpio % SIRFSOC_GPIO_BANK_SIZE;
}
+
static void sirfsoc_gpio_irq_ack(struct irq_data *d)
{
struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(d->hwirq);
@@ -566,38 +558,28 @@ static int sirfsoc_gpio_irq_type(struct irq_data *d, unsigned type)
return 0;
}
-static int sirfsoc_gpio_irq_reqres(struct irq_data *d)
-{
- if (gpio_lock_as_irq(&sgpio_chip.chip.gc, d->hwirq)) {
- dev_err(sgpio_chip.chip.gc.dev,
- "unable to lock HW IRQ %lu for IRQ\n",
- d->hwirq);
- return -EINVAL;
- }
- return 0;
-}
-
-static void sirfsoc_gpio_irq_relres(struct irq_data *d)
-{
- gpio_unlock_as_irq(&sgpio_chip.chip.gc, d->hwirq);
-}
-
static struct irq_chip sirfsoc_irq_chip = {
.name = "sirf-gpio-irq",
.irq_ack = sirfsoc_gpio_irq_ack,
.irq_mask = sirfsoc_gpio_irq_mask,
.irq_unmask = sirfsoc_gpio_irq_unmask,
.irq_set_type = sirfsoc_gpio_irq_type,
- .irq_request_resources = sirfsoc_gpio_irq_reqres,
- .irq_release_resources = sirfsoc_gpio_irq_relres,
};
static void sirfsoc_gpio_handle_irq(unsigned int irq, struct irq_desc *desc)
{
- struct sirfsoc_gpio_bank *bank = irq_get_handler_data(irq);
+ struct sirfsoc_gpio_bank *bank;
u32 status, ctrl;
int idx = 0;
struct irq_chip *chip = irq_get_chip(irq);
+ int i;
+
+ for (i = 0; i < SIRFSOC_GPIO_BANK_SIZE; i++) {
+ bank = &sgpio_chip.sgpio_bank[i];
+ if (bank->parent_irq == irq)
+ break;
+ }
+ BUG_ON (i == SIRFSOC_GPIO_BANK_SIZE);
chained_irq_enter(chip, desc);
@@ -620,7 +602,7 @@ static void sirfsoc_gpio_handle_irq(unsigned int irq, struct irq_desc *desc)
if ((status & 0x1) && (ctrl & SIRFSOC_GPIO_CTL_INTR_EN_MASK)) {
pr_debug("%s: gpio id %d idx %d happens\n",
__func__, bank->id, idx);
- generic_handle_irq(irq_find_mapping(sgpio_chip.domain, idx +
+ generic_handle_irq(irq_find_mapping(sgpio_chip.chip.gc.irqdomain, idx +
bank->id * SIRFSOC_GPIO_BANK_SIZE));
}
@@ -768,26 +750,6 @@ static void sirfsoc_gpio_set_value(struct gpio_chip *chip, unsigned offset,
spin_unlock_irqrestore(&bank->lock, flags);
}
-static int sirfsoc_gpio_irq_map(struct irq_domain *d, unsigned int irq,
- irq_hw_number_t hwirq)
-{
- struct sirfsoc_gpio_bank *bank = d->host_data;
-
- if (!bank)
- return -EINVAL;
-
- irq_set_chip(irq, &sirfsoc_irq_chip);
- irq_set_handler(irq, handle_level_irq);
- set_irq_flags(irq, IRQF_VALID);
-
- return 0;
-}
-
-static const struct irq_domain_ops sirfsoc_gpio_irq_simple_ops = {
- .map = sirfsoc_gpio_irq_map,
- .xlate = irq_domain_xlate_twocell,
-};
-
static void sirfsoc_gpio_set_pullup(const u32 *pullups)
{
int i, n;
@@ -826,7 +788,6 @@ static int sirfsoc_gpio_probe(struct device_node *np)
struct sirfsoc_gpio_bank *bank;
void __iomem *regs;
struct platform_device *pdev;
- struct irq_domain *domain;
bool is_marco = false;
u32 pullups[SIRFSOC_GPIO_NO_OF_BANKS], pulldowns[SIRFSOC_GPIO_NO_OF_BANKS];
@@ -842,21 +803,12 @@ static int sirfsoc_gpio_probe(struct device_node *np)
if (of_device_is_compatible(np, "sirf,marco-pinctrl"))
is_marco = 1;
- domain = irq_domain_add_linear(np, SIRFSOC_GPIO_BANK_SIZE * SIRFSOC_GPIO_NO_OF_BANKS,
- &sirfsoc_gpio_irq_simple_ops, &sgpio_chip);
- if (!domain) {
- pr_err("%s: Failed to create irqdomain\n", np->full_name);
- err = -ENOSYS;
- goto out;
- }
-
sgpio_chip.chip.gc.request = sirfsoc_gpio_request;
sgpio_chip.chip.gc.free = sirfsoc_gpio_free;
sgpio_chip.chip.gc.direction_input = sirfsoc_gpio_direction_input;
sgpio_chip.chip.gc.get = sirfsoc_gpio_get_value;
sgpio_chip.chip.gc.direction_output = sirfsoc_gpio_direction_output;
sgpio_chip.chip.gc.set = sirfsoc_gpio_set_value;
- sgpio_chip.chip.gc.to_irq = sirfsoc_gpio_to_irq;
sgpio_chip.chip.gc.base = 0;
sgpio_chip.chip.gc.ngpio = SIRFSOC_GPIO_BANK_SIZE * SIRFSOC_GPIO_NO_OF_BANKS;
sgpio_chip.chip.gc.label = kstrdup(np->full_name, GFP_KERNEL);
@@ -866,15 +818,24 @@ static int sirfsoc_gpio_probe(struct device_node *np)
sgpio_chip.chip.gc.dev = &pdev->dev;
sgpio_chip.chip.regs = regs;
sgpio_chip.is_marco = is_marco;
- sgpio_chip.domain = domain;
err = gpiochip_add(&sgpio_chip.chip.gc);
if (err) {
- pr_err("%s: error in probe function with status %d\n",
+ dev_err(&pdev->dev, "%s: error in probe function with status %d\n",
np->full_name, err);
goto out;
}
+ err = gpiochip_irqchip_add(&sgpio_chip.chip.gc,
+ &sirfsoc_irq_chip,
+ 0, handle_level_irq,
+ IRQ_TYPE_NONE);
+ if (err) {
+ dev_err(&pdev->dev,
+ "could not connect irqchip to gpiochip\n");
+ goto out;
+ }
+
for (i = 0; i < SIRFSOC_GPIO_NO_OF_BANKS; i++) {
bank = &sgpio_chip.sgpio_bank[i];
spin_lock_init(&bank->lock);
@@ -884,8 +845,10 @@ static int sirfsoc_gpio_probe(struct device_node *np)
goto out;
}
- irq_set_chained_handler(bank->parent_irq, sirfsoc_gpio_handle_irq);
- irq_set_handler_data(bank->parent_irq, bank);
+ gpiochip_set_chained_irqchip(&sgpio_chip.chip.gc,
+ &sirfsoc_irq_chip,
+ bank->parent_irq,
+ sirfsoc_gpio_handle_irq);
}
if (!of_property_read_u32_array(np, "sirf,pullups", pullups,
--
1.7.5.4
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