aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/omap24xx/patches-3.3/200-omap-platform.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/omap24xx/patches-3.3/200-omap-platform.patch')
-rw-r--r--target/linux/omap24xx/patches-3.3/200-omap-platform.patch897
1 files changed, 897 insertions, 0 deletions
diff --git a/target/linux/omap24xx/patches-3.3/200-omap-platform.patch b/target/linux/omap24xx/patches-3.3/200-omap-platform.patch
new file mode 100644
index 0000000000..6c215bdbed
--- /dev/null
+++ b/target/linux/omap24xx/patches-3.3/200-omap-platform.patch
@@ -0,0 +1,897 @@
+--- /dev/null
++++ b/arch/arm/plat-omap/bootreason.c
+@@ -0,0 +1,79 @@
++/*
++ * linux/arch/arm/plat-omap/bootreason.c
++ *
++ * OMAP Bootreason passing
++ *
++ * Copyright (c) 2004 Nokia
++ *
++ * Written by David Weinehall <david.weinehall@nokia.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License as published by the
++ * Free Software Foundation; either version 2 of the License, or (at your
++ * option) any later version.
++ *
++ * THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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.
++ *
++ * You should have received a copy of the GNU General Public License along
++ * with this program; if not, write to the Free Software Foundation, Inc.,
++ * 675 Mass Ave, Cambridge, MA 02139, USA.
++ */
++#include <linux/proc_fs.h>
++#include <linux/errno.h>
++#include <plat/board.h>
++
++static char boot_reason[16];
++
++static int omap_bootreason_read_proc(char *page, char **start, off_t off,
++ int count, int *eof, void *data)
++{
++ int len = 0;
++
++ len += sprintf(page + len, "%s\n", boot_reason);
++
++ *start = page + off;
++
++ if (len > off)
++ len -= off;
++ else
++ len = 0;
++
++ return len < count ? len : count;
++}
++
++static int __init bootreason_init(void)
++{
++ const struct omap_boot_reason_config *cfg;
++ int reason_valid = 0;
++
++ cfg = omap_get_config(OMAP_TAG_BOOT_REASON, struct omap_boot_reason_config);
++ if (cfg != NULL) {
++ strncpy(boot_reason, cfg->reason_str, sizeof(cfg->reason_str));
++ boot_reason[sizeof(cfg->reason_str)] = 0;
++ reason_valid = 1;
++ } else {
++ /* Read the boot reason from the OMAP registers */
++ }
++
++ if (!reason_valid)
++ return -ENOENT;
++
++ printk(KERN_INFO "Bootup reason: %s\n", boot_reason);
++
++ if (!create_proc_read_entry("bootreason", S_IRUGO, NULL,
++ omap_bootreason_read_proc, NULL))
++ return -ENOMEM;
++
++ return 0;
++}
++
++late_initcall(bootreason_init);
+--- a/arch/arm/plat-omap/common.c
++++ b/arch/arm/plat-omap/common.c
+@@ -24,18 +24,90 @@
+
+ #include <plat/omap-secure.h>
+
++#include <asm/setup.h>
++
+
+ #define NO_LENGTH_CHECK 0xffffffff
+
+ struct omap_board_config_kernel *omap_board_config __initdata;
+ int omap_board_config_size;
+
++unsigned char omap_bootloader_tag[1024];
++int omap_bootloader_tag_len;
++
++/* used by omap-smp.c and board-4430sdp.c */
++void __iomem *gic_cpu_base_addr;
++
++#ifdef CONFIG_OMAP_BOOT_TAG
++
++static int __init parse_tag_omap(const struct tag *tag)
++{
++ u32 size = tag->hdr.size - (sizeof(tag->hdr) >> 2);
++
++ size <<= 2;
++ if (size > sizeof(omap_bootloader_tag))
++ return -1;
++
++ memcpy(omap_bootloader_tag, tag->u.omap.data, size);
++ omap_bootloader_tag_len = size;
++
++ return 0;
++}
++
++__tagtable(ATAG_BOARD, parse_tag_omap);
++
++#endif
++
+ static const void *__init get_config(u16 tag, size_t len,
+ int skip, size_t *len_out)
+ {
+ struct omap_board_config_kernel *kinfo = NULL;
+ int i;
+
++#ifdef CONFIG_OMAP_BOOT_TAG
++ struct omap_board_config_entry *info = NULL;
++
++ if (omap_bootloader_tag_len > 4)
++ info = (struct omap_board_config_entry *) omap_bootloader_tag;
++ while (info != NULL) {
++ u8 *next;
++
++ if (info->tag == tag) {
++ if (skip == 0)
++ break;
++ skip--;
++ }
++
++ if ((info->len & 0x03) != 0) {
++ /* We bail out to avoid an alignment fault */
++ printk(KERN_ERR "OMAP peripheral config: Length (%d) not word-aligned (tag %04x)\n",
++ info->len, info->tag);
++ return NULL;
++ }
++ next = (u8 *) info + sizeof(*info) + info->len;
++ if (next >= omap_bootloader_tag + omap_bootloader_tag_len)
++ info = NULL;
++ else
++ info = (struct omap_board_config_entry *) next;
++ }
++ if (info != NULL) {
++ /* Check the length as a lame attempt to check for
++ * binary inconsistency. */
++ if (len != NO_LENGTH_CHECK) {
++ /* Word-align len */
++ if (len & 0x03)
++ len = (len + 3) & ~0x03;
++ if (info->len != len) {
++ printk(KERN_ERR "OMAP peripheral config: Length mismatch with tag %x (want %d, got %d)\n",
++ tag, len, info->len);
++ return NULL;
++ }
++ }
++ if (len_out != NULL)
++ *len_out = info->len;
++ return info->data;
++ }
++#endif
+ /* Try to find the config from the board-specific structures
+ * in the kernel. */
+ for (i = 0; i < omap_board_config_size; i++) {
+--- /dev/null
++++ b/arch/arm/plat-omap/component-version.c
+@@ -0,0 +1,64 @@
++/*
++ * linux/arch/arm/plat-omap/component-version.c
++ *
++ * Copyright (C) 2005 Nokia Corporation
++ * Written by Juha Yrjölä <juha.yrjola@nokia.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/err.h>
++#include <linux/proc_fs.h>
++#include <plat/board.h>
++
++static int component_version_read_proc(char *page, char **start, off_t off,
++ int count, int *eof, void *data)
++{
++ int len, i;
++ const struct omap_version_config *ver;
++ char *p;
++
++ i = 0;
++ p = page;
++ while ((ver = omap_get_nr_config(OMAP_TAG_VERSION_STR,
++ struct omap_version_config, i)) != NULL) {
++ p += sprintf(p, "%-12s%s\n", ver->component, ver->version);
++ i++;
++ }
++
++ len = (p - page) - off;
++ if (len < 0)
++ len = 0;
++
++ *eof = (len <= count) ? 1 : 0;
++ *start = page + off;
++
++ return len;
++}
++
++static int __init component_version_init(void)
++{
++ if (omap_get_config(OMAP_TAG_VERSION_STR, struct omap_version_config) == NULL)
++ return -ENODEV;
++ if (!create_proc_read_entry("component_version", S_IRUGO, NULL,
++ component_version_read_proc, NULL))
++ return -ENOMEM;
++
++ return 0;
++}
++
++static void __exit component_version_exit(void)
++{
++ remove_proc_entry("component_version", NULL);
++}
++
++late_initcall(component_version_init);
++module_exit(component_version_exit);
++
++MODULE_AUTHOR("Juha Yrjölä <juha.yrjola@nokia.com>");
++MODULE_DESCRIPTION("Component version driver");
++MODULE_LICENSE("GPL");
+--- a/arch/arm/plat-omap/Kconfig
++++ b/arch/arm/plat-omap/Kconfig
+@@ -84,6 +84,38 @@ config OMAP_RESET_CLOCKS
+ probably do not want this option enabled until your
+ device drivers work properly.
+
++config OMAP_BOOT_TAG
++ bool "OMAP bootloader information passing"
++ depends on ARCH_OMAP
++ default n
++ help
++ Say Y, if you have a bootloader which passes information
++ about your board and its peripheral configuration.
++
++config OMAP_BOOT_REASON
++ bool "Support for boot reason"
++ depends on OMAP_BOOT_TAG
++ default n
++ help
++ Say Y, if you want to have a procfs entry for reading the boot
++ reason in user-space.
++
++config OMAP_COMPONENT_VERSION
++ bool "Support for component version display"
++ depends on OMAP_BOOT_TAG && PROC_FS
++ default n
++ help
++ Say Y, if you want to have a procfs entry for reading component
++ versions (supplied by the bootloader) in user-space.
++
++config OMAP_GPIO_SWITCH
++ bool "GPIO switch support"
++ help
++ Say Y, if you want to have support for reporting of GPIO
++ switches (e.g. cover switches) via sysfs. Your bootloader has
++ to provide information about the switches to the kernel via the
++ ATAG_BOARD mechanism if they're not defined by the board config.
++
+ config OMAP_MUX
+ bool "OMAP multiplexing support"
+ depends on ARCH_OMAP
+--- a/arch/arm/plat-omap/Makefile
++++ b/arch/arm/plat-omap/Makefile
+@@ -20,6 +20,9 @@ obj-$(CONFIG_ARCH_OMAP4) += omap_device.
+ obj-$(CONFIG_OMAP_MCBSP) += mcbsp.o
+
+ obj-$(CONFIG_OMAP_DM_TIMER) += dmtimer.o
++obj-$(CONFIG_OMAP_BOOT_REASON) += bootreason.o
++obj-$(CONFIG_OMAP_COMPONENT_VERSION) += component-version.o
++obj-$(CONFIG_OMAP_GPIO_SWITCH) += gpio-switch.o
+ obj-$(CONFIG_OMAP_DEBUG_DEVICES) += debug-devices.o
+ obj-$(CONFIG_OMAP_DEBUG_LEDS) += debug-leds.o
+ i2c-omap-$(CONFIG_I2C_OMAP) := i2c.o
+--- a/arch/arm/include/asm/setup.h
++++ b/arch/arm/include/asm/setup.h
+@@ -136,6 +136,13 @@ struct tag_acorn {
+ __u8 adfsdrives;
+ };
+
++/* TI OMAP specific information */
++#define ATAG_BOARD 0x414f4d50
++
++struct tag_omap {
++ u8 data[0];
++};
++
+ /* footbridge memory clock, see arch/arm/mach-footbridge/arch.c */
+ #define ATAG_MEMCLK 0x41000402
+
+@@ -162,6 +169,11 @@ struct tag {
+ struct tag_acorn acorn;
+
+ /*
++ * OMAP specific
++ */
++ struct tag_omap omap;
++
++ /*
+ * DC21285 specific
+ */
+ struct tag_memclk memclk;
+--- /dev/null
++++ b/arch/arm/plat-omap/gpio-switch.c
+@@ -0,0 +1,554 @@
++/*
++ * linux/arch/arm/plat-omap/gpio-switch.c
++ *
++ * Copyright (C) 2004-2006 Nokia Corporation
++ * Written by Juha Yrjölä <juha.yrjola@nokia.com>
++ * and Paul Mundt <paul.mundt@nokia.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#include <linux/sched.h>
++#include <linux/init.h>
++#include <linux/list.h>
++#include <linux/irq.h>
++#include <linux/interrupt.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/timer.h>
++#include <linux/err.h>
++#include <linux/slab.h>
++#include <linux/gpio.h>
++#include <plat/hardware.h>
++#include <plat/irqs.h>
++#include <plat/mux.h>
++#include <plat/board.h>
++#include <plat/gpio-switch.h>
++
++struct gpio_switch {
++ char name[14];
++ u16 gpio;
++ unsigned flags:4;
++ unsigned type:4;
++ unsigned state:1;
++ unsigned both_edges:1;
++
++ u16 debounce_rising;
++ u16 debounce_falling;
++
++ void (* notify)(void *data, int state);
++ void *notify_data;
++
++ struct work_struct work;
++ struct timer_list timer;
++ struct platform_device pdev;
++
++ struct list_head node;
++};
++
++static LIST_HEAD(gpio_switches);
++static struct platform_device *gpio_sw_platform_dev;
++static struct platform_driver gpio_sw_driver;
++
++static const struct omap_gpio_switch *board_gpio_sw_table;
++static int board_gpio_sw_count;
++
++static const char *cover_str[2] = { "open", "closed" };
++static const char *connection_str[2] = { "disconnected", "connected" };
++static const char *activity_str[2] = { "inactive", "active" };
++
++/*
++ * GPIO switch state default debounce delay in ms
++ */
++#define OMAP_GPIO_SW_DEFAULT_DEBOUNCE 10
++
++static const char **get_sw_str(struct gpio_switch *sw)
++{
++ switch (sw->type) {
++ case OMAP_GPIO_SWITCH_TYPE_COVER:
++ return cover_str;
++ case OMAP_GPIO_SWITCH_TYPE_CONNECTION:
++ return connection_str;
++ case OMAP_GPIO_SWITCH_TYPE_ACTIVITY:
++ return activity_str;
++ default:
++ BUG();
++ return NULL;
++ }
++}
++
++static const char *get_sw_type(struct gpio_switch *sw)
++{
++ switch (sw->type) {
++ case OMAP_GPIO_SWITCH_TYPE_COVER:
++ return "cover";
++ case OMAP_GPIO_SWITCH_TYPE_CONNECTION:
++ return "connection";
++ case OMAP_GPIO_SWITCH_TYPE_ACTIVITY:
++ return "activity";
++ default:
++ BUG();
++ return NULL;
++ }
++}
++
++static void print_sw_state(struct gpio_switch *sw, int state)
++{
++ const char **str;
++
++ str = get_sw_str(sw);
++ if (str != NULL)
++ printk(KERN_INFO "%s (GPIO %d) is now %s\n", sw->name, sw->gpio, str[state]);
++}
++
++static int gpio_sw_get_state(struct gpio_switch *sw)
++{
++ int state;
++
++ state = gpio_get_value(sw->gpio);
++ if (sw->flags & OMAP_GPIO_SWITCH_FLAG_INVERTED)
++ state = !state;
++
++ return state;
++}
++
++static ssize_t gpio_sw_state_store(struct device *dev,
++ struct device_attribute *attr,
++ const char *buf,
++ size_t count)
++{
++ struct gpio_switch *sw = dev_get_drvdata(dev);
++ const char **str;
++ char state[16];
++ int enable;
++
++ if (!(sw->flags & OMAP_GPIO_SWITCH_FLAG_OUTPUT))
++ return -EPERM;
++
++ if (sscanf(buf, "%15s", state) != 1)
++ return -EINVAL;
++
++ str = get_sw_str(sw);
++ if (strcmp(state, str[0]) == 0)
++ sw->state = enable = 0;
++ else if (strcmp(state, str[1]) == 0)
++ sw->state = enable = 1;
++ else
++ return -EINVAL;
++
++ if (sw->flags & OMAP_GPIO_SWITCH_FLAG_INVERTED)
++ enable = !enable;
++ gpio_set_value(sw->gpio, enable);
++
++ return count;
++}
++
++static ssize_t gpio_sw_state_show(struct device *dev,
++ struct device_attribute *attr,
++ char *buf)
++{
++ struct gpio_switch *sw = dev_get_drvdata(dev);
++ const char **str;
++
++ str = get_sw_str(sw);
++ return sprintf(buf, "%s\n", str[sw->state]);
++}
++
++static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, gpio_sw_state_show,
++ gpio_sw_state_store);
++
++static ssize_t gpio_sw_type_show(struct device *dev,
++ struct device_attribute *attr,
++ char *buf)
++{
++ struct gpio_switch *sw = dev_get_drvdata(dev);
++
++ return sprintf(buf, "%s\n", get_sw_type(sw));
++}
++
++static DEVICE_ATTR(type, S_IRUGO, gpio_sw_type_show, NULL);
++
++static ssize_t gpio_sw_direction_show(struct device *dev,
++ struct device_attribute *attr,
++ char *buf)
++{
++ struct gpio_switch *sw = dev_get_drvdata(dev);
++ int is_output;
++
++ is_output = sw->flags & OMAP_GPIO_SWITCH_FLAG_OUTPUT;
++ return sprintf(buf, "%s\n", is_output ? "output" : "input");
++}
++
++static DEVICE_ATTR(direction, S_IRUGO, gpio_sw_direction_show, NULL);
++
++
++static irqreturn_t gpio_sw_irq_handler(int irq, void *arg)
++{
++ struct gpio_switch *sw = arg;
++ unsigned long timeout;
++ int state;
++
++ if (!sw->both_edges) {
++ if (gpio_get_value(sw->gpio))
++ irq_set_irq_type(OMAP_GPIO_IRQ(sw->gpio), IRQ_TYPE_EDGE_FALLING);
++ else
++ irq_set_irq_type(OMAP_GPIO_IRQ(sw->gpio), IRQ_TYPE_EDGE_RISING);
++ }
++
++ state = gpio_sw_get_state(sw);
++ if (sw->state == state)
++ return IRQ_HANDLED;
++
++ if (state)
++ timeout = sw->debounce_rising;
++ else
++ timeout = sw->debounce_falling;
++ if (!timeout)
++ schedule_work(&sw->work);
++ else
++ mod_timer(&sw->timer, jiffies + msecs_to_jiffies(timeout));
++
++ return IRQ_HANDLED;
++}
++
++static void gpio_sw_timer(unsigned long arg)
++{
++ struct gpio_switch *sw = (struct gpio_switch *) arg;
++
++ schedule_work(&sw->work);
++}
++
++static void gpio_sw_handler(struct work_struct *work)
++{
++ struct gpio_switch *sw = container_of(work, struct gpio_switch, work);
++ int state;
++
++ state = gpio_sw_get_state(sw);
++ if (sw->state == state)
++ return;
++
++ sw->state = state;
++ if (sw->notify != NULL)
++ sw->notify(sw->notify_data, state);
++ sysfs_notify(&sw->pdev.dev.kobj, NULL, "state");
++ print_sw_state(sw, state);
++}
++
++static int __init can_do_both_edges(struct gpio_switch *sw)
++{
++ if (!cpu_class_is_omap1())
++ return 1;
++ if (OMAP_GPIO_IS_MPUIO(sw->gpio))
++ return 0;
++ else
++ return 1;
++}
++
++static void gpio_sw_release(struct device *dev)
++{
++}
++
++static int __init new_switch(struct gpio_switch *sw)
++{
++ int r, direction, trigger;
++
++ switch (sw->type) {
++ case OMAP_GPIO_SWITCH_TYPE_COVER:
++ case OMAP_GPIO_SWITCH_TYPE_CONNECTION:
++ case OMAP_GPIO_SWITCH_TYPE_ACTIVITY:
++ break;
++ default:
++ printk(KERN_ERR "invalid GPIO switch type: %d\n", sw->type);
++ return -EINVAL;
++ }
++
++ sw->pdev.name = sw->name;
++ sw->pdev.id = -1;
++
++ sw->pdev.dev.parent = &gpio_sw_platform_dev->dev;
++ sw->pdev.dev.driver = &gpio_sw_driver.driver;
++ sw->pdev.dev.release = gpio_sw_release;
++
++ r = platform_device_register(&sw->pdev);
++ if (r) {
++ printk(KERN_ERR "gpio-switch: platform device registration "
++ "failed for %s", sw->name);
++ return r;
++ }
++ dev_set_drvdata(&sw->pdev.dev, sw);
++
++ r = gpio_request(sw->gpio, "gpio-switch");
++ if (r < 0) {
++ platform_device_unregister(&sw->pdev);
++ return r;
++ }
++
++ /* input: 1, output: 0 */
++ direction = !(sw->flags & OMAP_GPIO_SWITCH_FLAG_OUTPUT);
++ if (direction)
++ gpio_direction_input(sw->gpio);
++ else
++ gpio_direction_output(sw->gpio, 0);
++
++ sw->state = gpio_sw_get_state(sw);
++
++ r = 0;
++ r |= device_create_file(&sw->pdev.dev, &dev_attr_state);
++ r |= device_create_file(&sw->pdev.dev, &dev_attr_type);
++ r |= device_create_file(&sw->pdev.dev, &dev_attr_direction);
++ if (r)
++ printk(KERN_ERR "gpio-switch: attribute file creation "
++ "failed for %s\n", sw->name);
++
++ if (!direction)
++ return 0;
++
++ if (can_do_both_edges(sw)) {
++ trigger = IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING;
++ sw->both_edges = 1;
++ } else {
++ if (gpio_get_value(sw->gpio))
++ trigger = IRQF_TRIGGER_FALLING;
++ else
++ trigger = IRQF_TRIGGER_RISING;
++ }
++ r = request_irq(OMAP_GPIO_IRQ(sw->gpio), gpio_sw_irq_handler,
++ IRQF_SHARED | trigger, sw->name, sw);
++ if (r < 0) {
++ printk(KERN_ERR "gpio-switch: request_irq() failed "
++ "for GPIO %d\n", sw->gpio);
++ platform_device_unregister(&sw->pdev);
++ gpio_free(sw->gpio);
++ return r;
++ }
++
++ INIT_WORK(&sw->work, gpio_sw_handler);
++ init_timer(&sw->timer);
++
++ sw->timer.function = gpio_sw_timer;
++ sw->timer.data = (unsigned long)sw;
++
++ list_add(&sw->node, &gpio_switches);
++
++ return 0;
++}
++
++static int __init add_atag_switches(void)
++{
++ const struct omap_gpio_switch_config *cfg;
++ struct gpio_switch *sw;
++ int i, r;
++
++ for (i = 0; ; i++) {
++ cfg = omap_get_nr_config(OMAP_TAG_GPIO_SWITCH,
++ struct omap_gpio_switch_config, i);
++ if (cfg == NULL)
++ break;
++ sw = kzalloc(sizeof(*sw), GFP_KERNEL);
++ if (sw == NULL) {
++ printk(KERN_ERR "gpio-switch: kmalloc failed\n");
++ return -ENOMEM;
++ }
++ strncpy(sw->name, cfg->name, sizeof(cfg->name));
++ sw->gpio = cfg->gpio;
++ sw->flags = cfg->flags;
++ sw->type = cfg->type;
++ sw->debounce_rising = OMAP_GPIO_SW_DEFAULT_DEBOUNCE;
++ sw->debounce_falling = OMAP_GPIO_SW_DEFAULT_DEBOUNCE;
++ if ((r = new_switch(sw)) < 0) {
++ kfree(sw);
++ return r;
++ }
++ }
++ return 0;
++}
++
++static struct gpio_switch * __init find_switch(int gpio, const char *name)
++{
++ struct gpio_switch *sw;
++
++ list_for_each_entry(sw, &gpio_switches, node) {
++ if ((gpio < 0 || sw->gpio != gpio) &&
++ (name == NULL || strcmp(sw->name, name) != 0))
++ continue;
++
++ if (gpio < 0 || name == NULL)
++ goto no_check;
++
++ if (strcmp(sw->name, name) != 0)
++ printk("gpio-switch: name mismatch for %d (%s, %s)\n",
++ gpio, name, sw->name);
++ else if (sw->gpio != gpio)
++ printk("gpio-switch: GPIO mismatch for %s (%d, %d)\n",
++ name, gpio, sw->gpio);
++no_check:
++ return sw;
++ }
++ return NULL;
++}
++
++static int __init add_board_switches(void)
++{
++ int i;
++
++ for (i = 0; i < board_gpio_sw_count; i++) {
++ const struct omap_gpio_switch *cfg;
++ struct gpio_switch *sw;
++ int r;
++
++ cfg = board_gpio_sw_table + i;
++ if (strlen(cfg->name) > sizeof(sw->name) - 1)
++ return -EINVAL;
++ /* Check whether we only update an existing switch
++ * or add a new switch. */
++ sw = find_switch(cfg->gpio, cfg->name);
++ if (sw != NULL) {
++ sw->debounce_rising = cfg->debounce_rising;
++ sw->debounce_falling = cfg->debounce_falling;
++ sw->notify = cfg->notify;
++ sw->notify_data = cfg->notify_data;
++ continue;
++ } else {
++ if (cfg->gpio < 0 || cfg->name == NULL) {
++ printk("gpio-switch: required switch not "
++ "found (%d, %s)\n", cfg->gpio,
++ cfg->name);
++ continue;
++ }
++ }
++ sw = kzalloc(sizeof(*sw), GFP_KERNEL);
++ if (sw == NULL) {
++ printk(KERN_ERR "gpio-switch: kmalloc failed\n");
++ return -ENOMEM;
++ }
++ strlcpy(sw->name, cfg->name, sizeof(sw->name));
++ sw->gpio = cfg->gpio;
++ sw->flags = cfg->flags;
++ sw->type = cfg->type;
++ sw->debounce_rising = cfg->debounce_rising;
++ sw->debounce_falling = cfg->debounce_falling;
++ sw->notify = cfg->notify;
++ sw->notify_data = cfg->notify_data;
++ if ((r = new_switch(sw)) < 0) {
++ kfree(sw);
++ return r;
++ }
++ }
++ return 0;
++}
++
++static void gpio_sw_cleanup(void)
++{
++ struct gpio_switch *sw = NULL, *old = NULL;
++
++ list_for_each_entry(sw, &gpio_switches, node) {
++ if (old != NULL)
++ kfree(old);
++ flush_scheduled_work();
++ del_timer_sync(&sw->timer);
++
++ free_irq(OMAP_GPIO_IRQ(sw->gpio), sw);
++
++ device_remove_file(&sw->pdev.dev, &dev_attr_state);
++ device_remove_file(&sw->pdev.dev, &dev_attr_type);
++ device_remove_file(&sw->pdev.dev, &dev_attr_direction);
++
++ platform_device_unregister(&sw->pdev);
++ gpio_free(sw->gpio);
++ old = sw;
++ }
++ kfree(old);
++}
++
++static void __init report_initial_state(void)
++{
++ struct gpio_switch *sw;
++
++ list_for_each_entry(sw, &gpio_switches, node) {
++ int state;
++
++ state = gpio_get_value(sw->gpio);
++ if (sw->flags & OMAP_GPIO_SWITCH_FLAG_INVERTED)
++ state = !state;
++ if (sw->notify != NULL)
++ sw->notify(sw->notify_data, state);
++ print_sw_state(sw, state);
++ }
++}
++
++static int gpio_sw_remove(struct platform_device *dev)
++{
++ return 0;
++}
++
++static struct platform_driver gpio_sw_driver = {
++ .remove = gpio_sw_remove,
++ .driver = {
++ .name = "gpio-switch",
++ },
++};
++
++void __init omap_register_gpio_switches(const struct omap_gpio_switch *tbl,
++ int count)
++{
++ BUG_ON(board_gpio_sw_table != NULL);
++
++ board_gpio_sw_table = tbl;
++ board_gpio_sw_count = count;
++}
++
++static int __init gpio_sw_init(void)
++{
++ int r;
++
++ printk(KERN_INFO "OMAP GPIO switch handler initializing\n");
++
++ r = platform_driver_register(&gpio_sw_driver);
++ if (r)
++ return r;
++
++ gpio_sw_platform_dev = platform_device_register_simple("gpio-switch",
++ -1, NULL, 0);
++ if (IS_ERR(gpio_sw_platform_dev)) {
++ r = PTR_ERR(gpio_sw_platform_dev);
++ goto err1;
++ }
++
++ r = add_atag_switches();
++ if (r < 0)
++ goto err2;
++
++ r = add_board_switches();
++ if (r < 0)
++ goto err2;
++
++ report_initial_state();
++
++ return 0;
++err2:
++ gpio_sw_cleanup();
++ platform_device_unregister(gpio_sw_platform_dev);
++err1:
++ platform_driver_unregister(&gpio_sw_driver);
++ return r;
++}
++
++static void __exit gpio_sw_exit(void)
++{
++ gpio_sw_cleanup();
++ platform_device_unregister(gpio_sw_platform_dev);
++ platform_driver_unregister(&gpio_sw_driver);
++}
++
++#ifndef MODULE
++late_initcall(gpio_sw_init);
++#else
++module_init(gpio_sw_init);
++#endif
++module_exit(gpio_sw_exit);
++
++MODULE_AUTHOR("Juha Yrjölä <juha.yrjola@nokia.com>, Paul Mundt <paul.mundt@nokia.com");
++MODULE_DESCRIPTION("GPIO switch driver");
++MODULE_LICENSE("GPL");
+--- a/arch/arm/plat-omap/include/plat/board.h
++++ b/arch/arm/plat-omap/include/plat/board.h
+@@ -151,6 +151,14 @@ struct omap_board_config_kernel {
+ const void *data;
+ };
+
++struct omap_gpio_switch_config {
++ char name[12];
++ u16 gpio;
++ int flags:4;
++ int type:4;
++ int key_code:24; /* Linux key code */
++};
++
+ extern const void *__init __omap_get_config(u16 tag, size_t len, int nr);
+
+ #define omap_get_config(tag, type) \
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-27 08:39:01 +0000