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openwrt-owl/target/linux/brcm47xx/patches-4.4/901-Revert-bcma-switch-GPIO...

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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
Date: Fri, 18 Dec 2015 07:51:08 +0100
Subject: [PATCH] Revert "bcma: switch GPIO portions to use GPIOLIB_IRQCHIP"
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
This reverts commit 74f4e0cc61080f63f28e8d519bdf437957e64217.
On BCM47XX (MIPS) bcma_bus_get_host_dev returns NULL which results in:
[ 0.157054] missing gpiochip .dev parent pointer
[ 0.157287] bcma: bus0: Error registering GPIO driver: -22
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
---
drivers/bcma/Kconfig | 2 +-
drivers/bcma/driver_gpio.c | 92 +++++++++++++++++++----------
include/linux/bcma/bcma_driver_chipcommon.h | 1 +
3 files changed, 64 insertions(+), 31 deletions(-)
--- a/drivers/bcma/Kconfig
+++ b/drivers/bcma/Kconfig
@@ -106,7 +106,7 @@ config BCMA_DRIVER_GMAC_CMN
config BCMA_DRIVER_GPIO
bool "BCMA GPIO driver"
depends on BCMA && GPIOLIB
- select GPIOLIB_IRQCHIP if BCMA_HOST_SOC
+ select IRQ_DOMAIN if BCMA_HOST_SOC
help
Driver to provide access to the GPIO pins of the bcma bus.
--- a/drivers/bcma/driver_gpio.c
+++ b/drivers/bcma/driver_gpio.c
@@ -8,8 +8,10 @@
* Licensed under the GNU/GPL. See COPYING for details.
*/
-#include <linux/gpio/driver.h>
+#include <linux/gpio.h>
+#include <linux/irq.h>
#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
#include <linux/export.h>
#include <linux/bcma/bcma.h>
@@ -77,11 +79,19 @@ static void bcma_gpio_free(struct gpio_c
}
#if IS_BUILTIN(CONFIG_BCM47XX) || IS_BUILTIN(CONFIG_ARCH_BCM_5301X)
+static int bcma_gpio_to_irq(struct gpio_chip *chip, unsigned gpio)
+{
+ struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
+
+ if (cc->core->bus->hosttype == BCMA_HOSTTYPE_SOC)
+ return irq_find_mapping(cc->irq_domain, gpio);
+ else
+ return -EINVAL;
+}
static void bcma_gpio_irq_unmask(struct irq_data *d)
{
- struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
- struct bcma_drv_cc *cc = bcma_gpio_get_cc(gc);
+ struct bcma_drv_cc *cc = irq_data_get_irq_chip_data(d);
int gpio = irqd_to_hwirq(d);
u32 val = bcma_chipco_gpio_in(cc, BIT(gpio));
@@ -91,8 +101,7 @@ static void bcma_gpio_irq_unmask(struct
static void bcma_gpio_irq_mask(struct irq_data *d)
{
- struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
- struct bcma_drv_cc *cc = bcma_gpio_get_cc(gc);
+ struct bcma_drv_cc *cc = irq_data_get_irq_chip_data(d);
int gpio = irqd_to_hwirq(d);
bcma_chipco_gpio_intmask(cc, BIT(gpio), 0);
@@ -107,7 +116,6 @@ static struct irq_chip bcma_gpio_irq_chi
static irqreturn_t bcma_gpio_irq_handler(int irq, void *dev_id)
{
struct bcma_drv_cc *cc = dev_id;
- struct gpio_chip *gc = &cc->gpio;
u32 val = bcma_cc_read32(cc, BCMA_CC_GPIOIN);
u32 mask = bcma_cc_read32(cc, BCMA_CC_GPIOIRQ);
u32 pol = bcma_cc_read32(cc, BCMA_CC_GPIOPOL);
@@ -117,58 +125,81 @@ static irqreturn_t bcma_gpio_irq_handler
if (!irqs)
return IRQ_NONE;
- for_each_set_bit(gpio, &irqs, gc->ngpio)
- generic_handle_irq(irq_find_mapping(gc->irqdomain, gpio));
+ for_each_set_bit(gpio, &irqs, cc->gpio.ngpio)
+ generic_handle_irq(bcma_gpio_to_irq(&cc->gpio, gpio));
bcma_chipco_gpio_polarity(cc, irqs, val & irqs);
return IRQ_HANDLED;
}
-static int bcma_gpio_irq_init(struct bcma_drv_cc *cc)
+static int bcma_gpio_irq_domain_init(struct bcma_drv_cc *cc)
{
struct gpio_chip *chip = &cc->gpio;
- int hwirq, err;
+ int gpio, hwirq, err;
if (cc->core->bus->hosttype != BCMA_HOSTTYPE_SOC)
return 0;
+ cc->irq_domain = irq_domain_add_linear(NULL, chip->ngpio,
+ &irq_domain_simple_ops, cc);
+ if (!cc->irq_domain) {
+ err = -ENODEV;
+ goto err_irq_domain;
+ }
+ for (gpio = 0; gpio < chip->ngpio; gpio++) {
+ int irq = irq_create_mapping(cc->irq_domain, gpio);
+
+ irq_set_chip_data(irq, cc);
+ irq_set_chip_and_handler(irq, &bcma_gpio_irq_chip,
+ handle_simple_irq);
+ }
+
hwirq = bcma_core_irq(cc->core, 0);
err = request_irq(hwirq, bcma_gpio_irq_handler, IRQF_SHARED, "gpio",
cc);
if (err)
- return err;
+ goto err_req_irq;
bcma_chipco_gpio_intmask(cc, ~0, 0);
bcma_cc_set32(cc, BCMA_CC_IRQMASK, BCMA_CC_IRQ_GPIO);
- err = gpiochip_irqchip_add(chip,
- &bcma_gpio_irq_chip,
- 0,
- handle_simple_irq,
- IRQ_TYPE_NONE);
- if (err) {
- free_irq(hwirq, cc);
- return err;
- }
-
return 0;
+
+err_req_irq:
+ for (gpio = 0; gpio < chip->ngpio; gpio++) {
+ int irq = irq_find_mapping(cc->irq_domain, gpio);
+
+ irq_dispose_mapping(irq);
+ }
+ irq_domain_remove(cc->irq_domain);
+err_irq_domain:
+ return err;
}
-static void bcma_gpio_irq_exit(struct bcma_drv_cc *cc)
+static void bcma_gpio_irq_domain_exit(struct bcma_drv_cc *cc)
{
+ struct gpio_chip *chip = &cc->gpio;
+ int gpio;
+
if (cc->core->bus->hosttype != BCMA_HOSTTYPE_SOC)
return;
bcma_cc_mask32(cc, BCMA_CC_IRQMASK, ~BCMA_CC_IRQ_GPIO);
free_irq(bcma_core_irq(cc->core, 0), cc);
+ for (gpio = 0; gpio < chip->ngpio; gpio++) {
+ int irq = irq_find_mapping(cc->irq_domain, gpio);
+
+ irq_dispose_mapping(irq);
+ }
+ irq_domain_remove(cc->irq_domain);
}
#else
-static int bcma_gpio_irq_init(struct bcma_drv_cc *cc)
+static int bcma_gpio_irq_domain_init(struct bcma_drv_cc *cc)
{
return 0;
}
-static void bcma_gpio_irq_exit(struct bcma_drv_cc *cc)
+static void bcma_gpio_irq_domain_exit(struct bcma_drv_cc *cc)
{
}
#endif
@@ -187,8 +218,9 @@ int bcma_gpio_init(struct bcma_drv_cc *c
chip->set = bcma_gpio_set_value;
chip->direction_input = bcma_gpio_direction_input;
chip->direction_output = bcma_gpio_direction_output;
- chip->owner = THIS_MODULE;
- chip->dev = bcma_bus_get_host_dev(bus);
+#if IS_BUILTIN(CONFIG_BCM47XX) || IS_BUILTIN(CONFIG_ARCH_BCM_5301X)
+ chip->to_irq = bcma_gpio_to_irq;
+#endif
#if IS_BUILTIN(CONFIG_OF)
if (cc->core->bus->hosttype == BCMA_HOSTTYPE_SOC)
chip->of_node = cc->core->dev.of_node;
@@ -217,13 +249,13 @@ int bcma_gpio_init(struct bcma_drv_cc *c
else
chip->base = -1;
- err = gpiochip_add(chip);
+ err = bcma_gpio_irq_domain_init(cc);
if (err)
return err;
- err = bcma_gpio_irq_init(cc);
+ err = gpiochip_add(chip);
if (err) {
- gpiochip_remove(chip);
+ bcma_gpio_irq_domain_exit(cc);
return err;
}
@@ -232,7 +264,7 @@ int bcma_gpio_init(struct bcma_drv_cc *c
int bcma_gpio_unregister(struct bcma_drv_cc *cc)
{
- bcma_gpio_irq_exit(cc);
+ bcma_gpio_irq_domain_exit(cc);
gpiochip_remove(&cc->gpio);
return 0;
}
--- a/include/linux/bcma/bcma_driver_chipcommon.h
+++ b/include/linux/bcma/bcma_driver_chipcommon.h
@@ -649,6 +649,7 @@ struct bcma_drv_cc {
spinlock_t gpio_lock;
#ifdef CONFIG_BCMA_DRIVER_GPIO
struct gpio_chip gpio;
+ struct irq_domain *irq_domain;
#endif
};
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