234 lines
6.6 KiB
Diff
234 lines
6.6 KiB
Diff
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
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Date: Fri, 18 Dec 2015 07:51:08 +0100
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Subject: [PATCH] Revert "bcma: switch GPIO portions to use GPIOLIB_IRQCHIP"
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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This reverts commit 74f4e0cc61080f63f28e8d519bdf437957e64217.
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On BCM47XX (MIPS) bcma_bus_get_host_dev returns NULL which results in:
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[ 0.157054] missing gpiochip .dev parent pointer
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[ 0.157287] bcma: bus0: Error registering GPIO driver: -22
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Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
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---
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drivers/bcma/Kconfig | 2 +-
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drivers/bcma/driver_gpio.c | 92 +++++++++++++++++++----------
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include/linux/bcma/bcma_driver_chipcommon.h | 1 +
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3 files changed, 64 insertions(+), 31 deletions(-)
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--- a/drivers/bcma/Kconfig
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+++ b/drivers/bcma/Kconfig
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@@ -94,7 +94,7 @@ config BCMA_DRIVER_GMAC_CMN
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config BCMA_DRIVER_GPIO
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bool "BCMA GPIO driver"
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depends on BCMA && GPIOLIB
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- select GPIOLIB_IRQCHIP if BCMA_HOST_SOC
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+ select IRQ_DOMAIN if BCMA_HOST_SOC
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help
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Driver to provide access to the GPIO pins of the bcma bus.
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--- a/drivers/bcma/driver_gpio.c
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+++ b/drivers/bcma/driver_gpio.c
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@@ -8,8 +8,10 @@
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* Licensed under the GNU/GPL. See COPYING for details.
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*/
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-#include <linux/gpio/driver.h>
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+#include <linux/gpio.h>
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+#include <linux/irq.h>
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#include <linux/interrupt.h>
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+#include <linux/irqdomain.h>
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#include <linux/export.h>
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#include <linux/bcma/bcma.h>
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@@ -77,11 +79,19 @@ static void bcma_gpio_free(struct gpio_c
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}
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#if IS_BUILTIN(CONFIG_BCM47XX) || IS_BUILTIN(CONFIG_ARCH_BCM_5301X)
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+static int bcma_gpio_to_irq(struct gpio_chip *chip, unsigned gpio)
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+{
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+ struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
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+
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+ if (cc->core->bus->hosttype == BCMA_HOSTTYPE_SOC)
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+ return irq_find_mapping(cc->irq_domain, gpio);
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+ else
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+ return -EINVAL;
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+}
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static void bcma_gpio_irq_unmask(struct irq_data *d)
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{
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- struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
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- struct bcma_drv_cc *cc = bcma_gpio_get_cc(gc);
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+ struct bcma_drv_cc *cc = irq_data_get_irq_chip_data(d);
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int gpio = irqd_to_hwirq(d);
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u32 val = bcma_chipco_gpio_in(cc, BIT(gpio));
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@@ -91,8 +101,7 @@ static void bcma_gpio_irq_unmask(struct
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static void bcma_gpio_irq_mask(struct irq_data *d)
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{
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- struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
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- struct bcma_drv_cc *cc = bcma_gpio_get_cc(gc);
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+ struct bcma_drv_cc *cc = irq_data_get_irq_chip_data(d);
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int gpio = irqd_to_hwirq(d);
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bcma_chipco_gpio_intmask(cc, BIT(gpio), 0);
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@@ -107,7 +116,6 @@ static struct irq_chip bcma_gpio_irq_chi
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static irqreturn_t bcma_gpio_irq_handler(int irq, void *dev_id)
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{
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struct bcma_drv_cc *cc = dev_id;
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- struct gpio_chip *gc = &cc->gpio;
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u32 val = bcma_cc_read32(cc, BCMA_CC_GPIOIN);
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u32 mask = bcma_cc_read32(cc, BCMA_CC_GPIOIRQ);
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u32 pol = bcma_cc_read32(cc, BCMA_CC_GPIOPOL);
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@@ -117,58 +125,81 @@ static irqreturn_t bcma_gpio_irq_handler
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if (!irqs)
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return IRQ_NONE;
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- for_each_set_bit(gpio, &irqs, gc->ngpio)
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- generic_handle_irq(irq_find_mapping(gc->irqdomain, gpio));
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+ for_each_set_bit(gpio, &irqs, cc->gpio.ngpio)
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+ generic_handle_irq(bcma_gpio_to_irq(&cc->gpio, gpio));
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bcma_chipco_gpio_polarity(cc, irqs, val & irqs);
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return IRQ_HANDLED;
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}
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-static int bcma_gpio_irq_init(struct bcma_drv_cc *cc)
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+static int bcma_gpio_irq_domain_init(struct bcma_drv_cc *cc)
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{
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struct gpio_chip *chip = &cc->gpio;
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- int hwirq, err;
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+ int gpio, hwirq, err;
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if (cc->core->bus->hosttype != BCMA_HOSTTYPE_SOC)
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return 0;
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+ cc->irq_domain = irq_domain_add_linear(NULL, chip->ngpio,
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+ &irq_domain_simple_ops, cc);
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+ if (!cc->irq_domain) {
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+ err = -ENODEV;
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+ goto err_irq_domain;
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+ }
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+ for (gpio = 0; gpio < chip->ngpio; gpio++) {
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+ int irq = irq_create_mapping(cc->irq_domain, gpio);
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+
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+ irq_set_chip_data(irq, cc);
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+ irq_set_chip_and_handler(irq, &bcma_gpio_irq_chip,
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+ handle_simple_irq);
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+ }
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+
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hwirq = bcma_core_irq(cc->core, 0);
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err = request_irq(hwirq, bcma_gpio_irq_handler, IRQF_SHARED, "gpio",
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cc);
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if (err)
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- return err;
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+ goto err_req_irq;
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bcma_chipco_gpio_intmask(cc, ~0, 0);
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bcma_cc_set32(cc, BCMA_CC_IRQMASK, BCMA_CC_IRQ_GPIO);
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- err = gpiochip_irqchip_add(chip,
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- &bcma_gpio_irq_chip,
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- 0,
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- handle_simple_irq,
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- IRQ_TYPE_NONE);
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- if (err) {
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- free_irq(hwirq, cc);
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- return err;
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- }
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-
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return 0;
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+
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+err_req_irq:
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+ for (gpio = 0; gpio < chip->ngpio; gpio++) {
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+ int irq = irq_find_mapping(cc->irq_domain, gpio);
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+
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+ irq_dispose_mapping(irq);
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+ }
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+ irq_domain_remove(cc->irq_domain);
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+err_irq_domain:
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+ return err;
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}
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-static void bcma_gpio_irq_exit(struct bcma_drv_cc *cc)
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+static void bcma_gpio_irq_domain_exit(struct bcma_drv_cc *cc)
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{
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+ struct gpio_chip *chip = &cc->gpio;
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+ int gpio;
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+
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if (cc->core->bus->hosttype != BCMA_HOSTTYPE_SOC)
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return;
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bcma_cc_mask32(cc, BCMA_CC_IRQMASK, ~BCMA_CC_IRQ_GPIO);
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free_irq(bcma_core_irq(cc->core, 0), cc);
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+ for (gpio = 0; gpio < chip->ngpio; gpio++) {
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+ int irq = irq_find_mapping(cc->irq_domain, gpio);
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+
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+ irq_dispose_mapping(irq);
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+ }
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+ irq_domain_remove(cc->irq_domain);
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}
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#else
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-static int bcma_gpio_irq_init(struct bcma_drv_cc *cc)
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+static int bcma_gpio_irq_domain_init(struct bcma_drv_cc *cc)
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{
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return 0;
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}
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-static void bcma_gpio_irq_exit(struct bcma_drv_cc *cc)
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+static void bcma_gpio_irq_domain_exit(struct bcma_drv_cc *cc)
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{
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}
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#endif
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@@ -187,8 +218,9 @@ int bcma_gpio_init(struct bcma_drv_cc *c
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chip->set = bcma_gpio_set_value;
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chip->direction_input = bcma_gpio_direction_input;
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chip->direction_output = bcma_gpio_direction_output;
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- chip->owner = THIS_MODULE;
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- chip->dev = bcma_bus_get_host_dev(bus);
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+#if IS_BUILTIN(CONFIG_BCM47XX) || IS_BUILTIN(CONFIG_ARCH_BCM_5301X)
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+ chip->to_irq = bcma_gpio_to_irq;
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+#endif
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#if IS_BUILTIN(CONFIG_OF)
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if (cc->core->bus->hosttype == BCMA_HOSTTYPE_SOC)
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chip->of_node = cc->core->dev.of_node;
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@@ -216,13 +248,13 @@ int bcma_gpio_init(struct bcma_drv_cc *c
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else
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chip->base = -1;
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- err = gpiochip_add(chip);
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+ err = bcma_gpio_irq_domain_init(cc);
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if (err)
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return err;
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- err = bcma_gpio_irq_init(cc);
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+ err = gpiochip_add(chip);
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if (err) {
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- gpiochip_remove(chip);
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+ bcma_gpio_irq_domain_exit(cc);
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return err;
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}
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@@ -231,7 +263,7 @@ int bcma_gpio_init(struct bcma_drv_cc *c
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int bcma_gpio_unregister(struct bcma_drv_cc *cc)
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{
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- bcma_gpio_irq_exit(cc);
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+ bcma_gpio_irq_domain_exit(cc);
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gpiochip_remove(&cc->gpio);
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return 0;
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}
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--- a/include/linux/bcma/bcma_driver_chipcommon.h
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+++ b/include/linux/bcma/bcma_driver_chipcommon.h
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@@ -640,6 +640,7 @@ struct bcma_drv_cc {
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spinlock_t gpio_lock;
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#ifdef CONFIG_BCMA_DRIVER_GPIO
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struct gpio_chip gpio;
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+ struct irq_domain *irq_domain;
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#endif
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};
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