mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-22 15:02:32 +00:00
8c405cdccc
The patches were generated from the RPi repo with the following command: git format-patch v6.6.34..rpi-6.1.y Some patches needed rebasing and, as usual, the applied and reverted, wireless drivers, Github workflows, READMEs and defconfigs patches were removed. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
301 lines
9.0 KiB
Diff
301 lines
9.0 KiB
Diff
From 862eb3a09138f7aaf0bf1ab25d7e3a7a447fc15b Mon Sep 17 00:00:00 2001
|
|
From: Jonathan Bell <jonathan@raspberrypi.com>
|
|
Date: Wed, 26 Apr 2023 13:44:15 +0100
|
|
Subject: [PATCH 0507/1085] drivers: char: delete bcm2835-gpiomem
|
|
|
|
This functionality is now provided by raspberrypi-gpiomem.
|
|
|
|
Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
|
|
---
|
|
drivers/char/broadcom/Kconfig | 8 -
|
|
drivers/char/broadcom/Makefile | 1 -
|
|
drivers/char/broadcom/bcm2835-gpiomem.c | 258 ------------------------
|
|
3 files changed, 267 deletions(-)
|
|
delete mode 100644 drivers/char/broadcom/bcm2835-gpiomem.c
|
|
|
|
--- a/drivers/char/broadcom/Kconfig
|
|
+++ b/drivers/char/broadcom/Kconfig
|
|
@@ -23,14 +23,6 @@ config BCM_VCIO
|
|
|
|
endif
|
|
|
|
-config BCM2835_DEVGPIOMEM
|
|
- tristate "/dev/gpiomem rootless GPIO access via mmap() on the BCM2835"
|
|
- default m
|
|
- help
|
|
- Provides users with root-free access to the GPIO registers
|
|
- on the 2835. Calling mmap(/dev/gpiomem) will map the GPIO
|
|
- register page to the user's pointer.
|
|
-
|
|
config BCM2835_SMI_DEV
|
|
tristate "Character device driver for BCM2835 Secondary Memory Interface"
|
|
depends on BCM2835_SMI
|
|
--- a/drivers/char/broadcom/Makefile
|
|
+++ b/drivers/char/broadcom/Makefile
|
|
@@ -1,4 +1,3 @@
|
|
obj-$(CONFIG_BCM2708_VCMEM) += vc_mem.o
|
|
obj-$(CONFIG_BCM_VCIO) += vcio.o
|
|
-obj-$(CONFIG_BCM2835_DEVGPIOMEM)+= bcm2835-gpiomem.o
|
|
obj-$(CONFIG_BCM2835_SMI_DEV) += bcm2835_smi_dev.o
|
|
--- a/drivers/char/broadcom/bcm2835-gpiomem.c
|
|
+++ /dev/null
|
|
@@ -1,258 +0,0 @@
|
|
-/**
|
|
- * GPIO memory device driver
|
|
- *
|
|
- * Creates a chardev /dev/gpiomem which will provide user access to
|
|
- * the BCM2835's GPIO registers when it is mmap()'d.
|
|
- * No longer need root for user GPIO access, but without relaxing permissions
|
|
- * on /dev/mem.
|
|
- *
|
|
- * Written by Luke Wren <luke@raspberrypi.org>
|
|
- * Copyright (c) 2015, Raspberry Pi (Trading) Ltd.
|
|
- *
|
|
- * Redistribution and use in source and binary forms, with or without
|
|
- * modification, are permitted provided that the following conditions
|
|
- * are met:
|
|
- * 1. Redistributions of source code must retain the above copyright
|
|
- * notice, this list of conditions, and the following disclaimer,
|
|
- * without modification.
|
|
- * 2. Redistributions in binary form must reproduce the above copyright
|
|
- * notice, this list of conditions and the following disclaimer in the
|
|
- * documentation and/or other materials provided with the distribution.
|
|
- * 3. The names of the above-listed copyright holders may not be used
|
|
- * to endorse or promote products derived from this software without
|
|
- * specific prior written permission.
|
|
- *
|
|
- * ALTERNATIVELY, this software may be distributed under the terms of the
|
|
- * GNU General Public License ("GPL") version 2, as published by the Free
|
|
- * Software Foundation.
|
|
- *
|
|
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
|
|
- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
|
|
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
|
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
- */
|
|
-
|
|
-#include <linux/kernel.h>
|
|
-#include <linux/module.h>
|
|
-#include <linux/of.h>
|
|
-#include <linux/platform_device.h>
|
|
-#include <linux/mm.h>
|
|
-#include <linux/slab.h>
|
|
-#include <linux/cdev.h>
|
|
-#include <linux/pagemap.h>
|
|
-#include <linux/io.h>
|
|
-
|
|
-#define DEVICE_NAME "bcm2835-gpiomem"
|
|
-#define DRIVER_NAME "gpiomem-bcm2835"
|
|
-#define DEVICE_MINOR 0
|
|
-
|
|
-struct bcm2835_gpiomem_instance {
|
|
- unsigned long gpio_regs_phys;
|
|
- struct device *dev;
|
|
-};
|
|
-
|
|
-static struct cdev bcm2835_gpiomem_cdev;
|
|
-static dev_t bcm2835_gpiomem_devid;
|
|
-static struct class *bcm2835_gpiomem_class;
|
|
-static struct device *bcm2835_gpiomem_dev;
|
|
-static struct bcm2835_gpiomem_instance *inst;
|
|
-
|
|
-
|
|
-/****************************************************************************
|
|
-*
|
|
-* GPIO mem chardev file ops
|
|
-*
|
|
-***************************************************************************/
|
|
-
|
|
-static int bcm2835_gpiomem_open(struct inode *inode, struct file *file)
|
|
-{
|
|
- int dev = iminor(inode);
|
|
- int ret = 0;
|
|
-
|
|
- if (dev != DEVICE_MINOR) {
|
|
- dev_err(inst->dev, "Unknown minor device: %d", dev);
|
|
- ret = -ENXIO;
|
|
- }
|
|
- return ret;
|
|
-}
|
|
-
|
|
-static int bcm2835_gpiomem_release(struct inode *inode, struct file *file)
|
|
-{
|
|
- int dev = iminor(inode);
|
|
- int ret = 0;
|
|
-
|
|
- if (dev != DEVICE_MINOR) {
|
|
- dev_err(inst->dev, "Unknown minor device %d", dev);
|
|
- ret = -ENXIO;
|
|
- }
|
|
- return ret;
|
|
-}
|
|
-
|
|
-static const struct vm_operations_struct bcm2835_gpiomem_vm_ops = {
|
|
-#ifdef CONFIG_HAVE_IOREMAP_PROT
|
|
- .access = generic_access_phys
|
|
-#endif
|
|
-};
|
|
-
|
|
-static int bcm2835_gpiomem_mmap(struct file *file, struct vm_area_struct *vma)
|
|
-{
|
|
- /* Ignore what the user says - they're getting the GPIO regs
|
|
- whether they like it or not! */
|
|
- unsigned long gpio_page = inst->gpio_regs_phys >> PAGE_SHIFT;
|
|
-
|
|
- vma->vm_page_prot = phys_mem_access_prot(file, gpio_page,
|
|
- PAGE_SIZE,
|
|
- vma->vm_page_prot);
|
|
- vma->vm_ops = &bcm2835_gpiomem_vm_ops;
|
|
- if (remap_pfn_range(vma, vma->vm_start,
|
|
- gpio_page,
|
|
- PAGE_SIZE,
|
|
- vma->vm_page_prot)) {
|
|
- return -EAGAIN;
|
|
- }
|
|
- return 0;
|
|
-}
|
|
-
|
|
-static const struct file_operations
|
|
-bcm2835_gpiomem_fops = {
|
|
- .owner = THIS_MODULE,
|
|
- .open = bcm2835_gpiomem_open,
|
|
- .release = bcm2835_gpiomem_release,
|
|
- .mmap = bcm2835_gpiomem_mmap,
|
|
-};
|
|
-
|
|
-
|
|
- /****************************************************************************
|
|
-*
|
|
-* Probe and remove functions
|
|
-*
|
|
-***************************************************************************/
|
|
-
|
|
-
|
|
-static int bcm2835_gpiomem_probe(struct platform_device *pdev)
|
|
-{
|
|
- int err;
|
|
- void *ptr_err;
|
|
- struct device *dev = &pdev->dev;
|
|
- struct resource *ioresource;
|
|
-
|
|
- /* Allocate buffers and instance data */
|
|
-
|
|
- inst = kzalloc(sizeof(struct bcm2835_gpiomem_instance), GFP_KERNEL);
|
|
-
|
|
- if (!inst) {
|
|
- err = -ENOMEM;
|
|
- goto failed_inst_alloc;
|
|
- }
|
|
-
|
|
- inst->dev = dev;
|
|
-
|
|
- ioresource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
- if (ioresource) {
|
|
- inst->gpio_regs_phys = ioresource->start;
|
|
- } else {
|
|
- dev_err(inst->dev, "failed to get IO resource");
|
|
- err = -ENOENT;
|
|
- goto failed_get_resource;
|
|
- }
|
|
-
|
|
- /* Create character device entries */
|
|
-
|
|
- err = alloc_chrdev_region(&bcm2835_gpiomem_devid,
|
|
- DEVICE_MINOR, 1, DEVICE_NAME);
|
|
- if (err != 0) {
|
|
- dev_err(inst->dev, "unable to allocate device number");
|
|
- goto failed_alloc_chrdev;
|
|
- }
|
|
- cdev_init(&bcm2835_gpiomem_cdev, &bcm2835_gpiomem_fops);
|
|
- bcm2835_gpiomem_cdev.owner = THIS_MODULE;
|
|
- err = cdev_add(&bcm2835_gpiomem_cdev, bcm2835_gpiomem_devid, 1);
|
|
- if (err != 0) {
|
|
- dev_err(inst->dev, "unable to register device");
|
|
- goto failed_cdev_add;
|
|
- }
|
|
-
|
|
- /* Create sysfs entries */
|
|
-
|
|
- bcm2835_gpiomem_class = class_create(DEVICE_NAME);
|
|
- ptr_err = bcm2835_gpiomem_class;
|
|
- if (IS_ERR(ptr_err))
|
|
- goto failed_class_create;
|
|
-
|
|
- bcm2835_gpiomem_dev = device_create(bcm2835_gpiomem_class, NULL,
|
|
- bcm2835_gpiomem_devid, NULL,
|
|
- "gpiomem");
|
|
- ptr_err = bcm2835_gpiomem_dev;
|
|
- if (IS_ERR(ptr_err))
|
|
- goto failed_device_create;
|
|
-
|
|
- dev_info(inst->dev, "Initialised: Registers at 0x%08lx",
|
|
- inst->gpio_regs_phys);
|
|
-
|
|
- return 0;
|
|
-
|
|
-failed_device_create:
|
|
- class_destroy(bcm2835_gpiomem_class);
|
|
-failed_class_create:
|
|
- cdev_del(&bcm2835_gpiomem_cdev);
|
|
- err = PTR_ERR(ptr_err);
|
|
-failed_cdev_add:
|
|
- unregister_chrdev_region(bcm2835_gpiomem_devid, 1);
|
|
-failed_alloc_chrdev:
|
|
-failed_get_resource:
|
|
- kfree(inst);
|
|
-failed_inst_alloc:
|
|
- dev_err(inst->dev, "could not load bcm2835_gpiomem");
|
|
- return err;
|
|
-}
|
|
-
|
|
-static int bcm2835_gpiomem_remove(struct platform_device *pdev)
|
|
-{
|
|
- struct device *dev = inst->dev;
|
|
-
|
|
- kfree(inst);
|
|
- device_destroy(bcm2835_gpiomem_class, bcm2835_gpiomem_devid);
|
|
- class_destroy(bcm2835_gpiomem_class);
|
|
- cdev_del(&bcm2835_gpiomem_cdev);
|
|
- unregister_chrdev_region(bcm2835_gpiomem_devid, 1);
|
|
-
|
|
- dev_info(dev, "GPIO mem driver removed - OK");
|
|
- return 0;
|
|
-}
|
|
-
|
|
- /****************************************************************************
|
|
-*
|
|
-* Register the driver with device tree
|
|
-*
|
|
-***************************************************************************/
|
|
-
|
|
-static const struct of_device_id bcm2835_gpiomem_of_match[] = {
|
|
- {.compatible = "brcm,bcm2835-gpiomem",},
|
|
- { /* sentinel */ },
|
|
-};
|
|
-
|
|
-MODULE_DEVICE_TABLE(of, bcm2835_gpiomem_of_match);
|
|
-
|
|
-static struct platform_driver bcm2835_gpiomem_driver = {
|
|
- .probe = bcm2835_gpiomem_probe,
|
|
- .remove = bcm2835_gpiomem_remove,
|
|
- .driver = {
|
|
- .name = DRIVER_NAME,
|
|
- .owner = THIS_MODULE,
|
|
- .of_match_table = bcm2835_gpiomem_of_match,
|
|
- },
|
|
-};
|
|
-
|
|
-module_platform_driver(bcm2835_gpiomem_driver);
|
|
-
|
|
-MODULE_ALIAS("platform:gpiomem-bcm2835");
|
|
-MODULE_LICENSE("GPL");
|
|
-MODULE_DESCRIPTION("gpiomem driver for accessing GPIO from userspace");
|
|
-MODULE_AUTHOR("Luke Wren <luke@raspberrypi.org>");
|