68 lines
2.2 KiB
Diff
68 lines
2.2 KiB
Diff
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From 6413adc1fbf4c3e9a2bcd707dd7776f419988d7c Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Tue, 6 Oct 2015 10:16:58 +0100
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Subject: [PATCH 198/203] bcm2835-gpiomem: Fix for ARCH_BCM2835 builds
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Build on ARCH_BCM2835, and fail to probe if no IO resource.
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See: https://github.com/raspberrypi/linux/issues/1154
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---
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drivers/char/broadcom/bcm2835-gpiomem.c | 25 ++++++++++---------------
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1 file changed, 10 insertions(+), 15 deletions(-)
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--- a/drivers/char/broadcom/bcm2835-gpiomem.c
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+++ b/drivers/char/broadcom/bcm2835-gpiomem.c
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@@ -143,7 +143,6 @@ static int bcm2835_gpiomem_probe(struct
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int err;
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void *ptr_err;
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struct device *dev = &pdev->dev;
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- struct device_node *node = dev->of_node;
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struct resource *ioresource;
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/* Allocate buffers and instance data */
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@@ -157,6 +156,15 @@ static int bcm2835_gpiomem_probe(struct
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inst->dev = dev;
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+ ioresource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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+ if (ioresource) {
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+ inst->gpio_regs_phys = ioresource->start;
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+ } else {
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+ dev_err(inst->dev, "failed to get IO resource");
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+ err = -ENOENT;
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+ goto failed_get_resource;
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+ }
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+
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/* Create character device entries */
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err = alloc_chrdev_region(&bcm2835_gpiomem_devid,
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@@ -187,20 +195,6 @@ static int bcm2835_gpiomem_probe(struct
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if (IS_ERR(ptr_err))
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goto failed_device_create;
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- /* Get address from device tree if available (*_resource() correctly
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- converts the bus address in device tree to a physical address),
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- or use hardcoded offset + BCM2708_PERI_BASE if not.
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- (In spite of its name 2708 actually seems to have the correct
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- mach-dependent value on 2709 etc, as it is defined in
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- mach-bcm270x/platform.h) */
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-
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- if (node) {
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- ioresource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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- inst->gpio_regs_phys = ioresource->start;
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- } else {
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- inst->gpio_regs_phys = GPIO_BASE;
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- }
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-
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dev_info(inst->dev, "Initialised: Registers at 0x%08lx",
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inst->gpio_regs_phys);
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@@ -214,6 +208,7 @@ failed_class_create:
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failed_cdev_add:
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unregister_chrdev_region(bcm2835_gpiomem_devid, 1);
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failed_alloc_chrdev:
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+failed_get_resource:
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kfree(inst);
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failed_inst_alloc:
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dev_err(inst->dev, "could not load bcm2835_gpiomem");
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