Release 4.11 arch/arm/mach-pxa/reset.c
/*
* 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/kernel.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/io.h>
#include <asm/proc-fns.h>
#include <asm/system_misc.h>
#include <mach/regs-ost.h>
#include <mach/reset.h>
#include <mach/smemc.h>
unsigned int reset_status;
EXPORT_SYMBOL(reset_status);
static void do_hw_reset(void);
static int reset_gpio = -1;
int init_gpio_reset(int gpio, int output, int level)
{
int rc;
rc = gpio_request(gpio, "reset generator");
if (rc) {
printk(KERN_ERR "Can't request reset_gpio\n");
goto out;
}
if (output)
rc = gpio_direction_output(gpio, level);
else
rc = gpio_direction_input(gpio);
if (rc) {
printk(KERN_ERR "Can't configure reset_gpio\n");
gpio_free(gpio);
goto out;
}
out:
if (!rc)
reset_gpio = gpio;
return rc;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dmitry Baryshkov | 92 | 95.83% | 2 | 66.67% |
| Daniel Ribeiro | 4 | 4.17% | 1 | 33.33% |
| Total | 96 | 100.00% | 3 | 100.00% |
/*
* Trigger GPIO reset.
* This covers various types of logic connecting gpio pin
* to RESET pins (nRESET or GPIO_RESET):
*/
static void do_gpio_reset(void)
{
BUG_ON(reset_gpio == -1);
/* drive it low */
gpio_direction_output(reset_gpio, 0);
mdelay(2);
/* rising edge or drive high */
gpio_set_value(reset_gpio, 1);
mdelay(2);
/* falling edge */
gpio_set_value(reset_gpio, 0);
/* give it some time */
mdelay(10);
WARN_ON(1);
/* fallback */
do_hw_reset();
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dmitry Baryshkov | 65 | 100.00% | 1 | 100.00% |
| Total | 65 | 100.00% | 1 | 100.00% |
static void do_hw_reset(void)
{
/* Initialize the watchdog and let it fire */
writel_relaxed(OWER_WME, OWER);
writel_relaxed(OSSR_M3, OSSR);
/* ... in 100 ms */
writel_relaxed(readl_relaxed(OSCR) + 368640, OSMR3);
/*
* SDRAM hangs on watchdog reset on Marvell PXA270 (erratum 71)
* we put SDRAM into self-refresh to prevent that
*/
while (1)
writel_relaxed(MDREFR_SLFRSH, MDREFR);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Russell King | 19 | 39.58% | 1 | 33.33% |
| Dmitry Baryshkov | 17 | 35.42% | 1 | 33.33% |
| Sergey Yanovich | 12 | 25.00% | 1 | 33.33% |
| Total | 48 | 100.00% | 3 | 100.00% |
void pxa_restart(enum reboot_mode mode, const char *cmd)
{
local_irq_disable();
local_fiq_disable();
clear_reset_status(RESET_STATUS_ALL);
switch (mode) {
case REBOOT_SOFT:
/* Jump into ROM at address 0 */
soft_restart(0);
break;
case REBOOT_GPIO:
do_gpio_reset();
break;
case REBOOT_HARD:
default:
do_hw_reset();
break;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dmitry Baryshkov | 31 | 55.36% | 1 | 14.29% |
| Russell King | 13 | 23.21% | 3 | 42.86% |
| Robin Holt | 5 | 8.93% | 1 | 14.29% |
| Eric Miao | 4 | 7.14% | 1 | 14.29% |
| Jaya Kumar | 3 | 5.36% | 1 | 14.29% |
| Total | 56 | 100.00% | 7 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dmitry Baryshkov | 240 | 75.00% | 2 | 12.50% |
| Russell King | 34 | 10.62% | 6 | 37.50% |
| Sergey Yanovich | 15 | 4.69% | 1 | 6.25% |
| Eric Miao | 14 | 4.38% | 2 | 12.50% |
| Robin Holt | 5 | 1.56% | 1 | 6.25% |
| Daniel Ribeiro | 4 | 1.25% | 1 | 6.25% |
| Jaya Kumar | 3 | 0.94% | 1 | 6.25% |
| David Howells | 3 | 0.94% | 1 | 6.25% |
| Philipp Zabel | 2 | 0.62% | 1 | 6.25% |
| Total | 320 | 100.00% | 16 | 100.00% |
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