mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 21:54:06 +08:00
44d82e2963
This branch contains a set of device-tree conversions for Marvell Orion platforms that were staged early but took a few tries to get the branch into a format where it was suitable for us to pick up. Given that most people working on these platforms are hobbyists with limited time, we were a bit more flexible with merging it even though it came in late. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAABAgAGBQJQGrp8AAoJEIwa5zzehBx3Ou8P/3HA53sS2WotNsBjpGTPuJim TppOmfFU6e7TLaY2oOWjIb5tPxK96u4vvCnQFAv+9TF+ewW0yCQlkBIJga3uVE7+ tlz5TbKBo+vQYrFgFCpEwwTHYuLgjpIK4wDs+09EkIM4cMqe6RnLK1KGo6vCAqO9 CKE0rqEfUFjdUq2jed7HA39iwNqJrz8VGLviozvTjW2R42x9iGuy5m2DpThYrLzr 7IYwKGMaJIatG1C/pai7KLEjdJgQl9PeDsgG0oyYY2HHeNy3o8m7tLOL3tnWXeyj XaniNs/YZBp4nADf2sCzXxEVjqRBPVyiw8qCHEOW5L1cfUTq//1QDI3I4kcQzffg VsfLPNvzFsPEMlLI1Xo5UX/8w3xQhBeoI8PtlX7coBMBLn5rJXGnjGpEnH+5SsSA 8KXxm4hP2aOGF+injoEv5HCEiUngH4YPN4hgXwyYdJKcln2YHy8xoIVabsmx27+v bSfododiEvHsBNxfz0Nn5Vo5O3trubU3qe4FEBAhS3pU3GksBocokAqtxeR+BBbH RfBVJ09QEYx1N+c6bhGQXt7F+8sUYO0s9tA7BEkeJtiXp8OX6M8eE4mFoMpIJbsC SmyxsVEE9pna9x3TSy42jiGO3yxbuKEoAy2HfyU1R8yq84XBFXbkgwV02tQcgClz vH4VgGdQoGULqa83GImG =xb8w -----END PGP SIGNATURE----- Merge tag 'dt2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull arm-soc Marvell Orion device-tree updates from Olof Johansson: "This contains a set of device-tree conversions for Marvell Orion platforms that were staged early but took a few tries to get the branch into a format where it was suitable for us to pick up. Given that most people working on these platforms are hobbyists with limited time, we were a bit more flexible with merging it even though it came in late." * tag 'dt2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (21 commits) ARM: Kirkwood: Replace mrvl with marvell ARM: Kirkwood: Describe GoFlex Net LEDs and SATA in DT. ARM: Kirkwood: Describe Dreamplug LEDs in DT. ARM: Kirkwood: Describe iConnects LEDs in DT. ARM: Kirkwood: Describe iConnects temperature sensor in DT. ARM: Kirkwood: Describe IB62x0 LEDs in DT. ARM: Kirkwood: Describe IB62x0 gpio-keys in DT. ARM: Kirkwood: Describe DNS32? gpio-keys in DT. ARM: Kirkwood: Move common portions into a kirkwood-dnskw.dtsi ARM: Kirkwood: Replace DNS-320/DNS-325 leds with dt bindings ARM: Kirkwood: Describe DNS325 temperature sensor in DT. ARM: Kirkwood: Use DT to configure SATA device. ARM: kirkwood: use devicetree for SPI on dreamplug ARM: kirkwood: Add LS-XHL and LS-CHLv2 support ARM: Kirkwood: Initial DTS support for Kirkwood GoFlex Net ARM: Kirkwood: Add basic device tree support for QNAP TS219. ATA: sata_mv: Add device tree support ARM: Orion: DTify the watchdog timer. ARM: Orion: Add arch support needed for I2C via DT. ARM: kirkwood: use devicetree for orion-spi ... Conflicts: drivers/watchdog/orion_wdt.c
227 lines
5.3 KiB
C
227 lines
5.3 KiB
C
/*
|
|
* drivers/watchdog/orion_wdt.c
|
|
*
|
|
* Watchdog driver for Orion/Kirkwood processors
|
|
*
|
|
* Author: Sylver Bruneau <sylver.bruneau@googlemail.com>
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public
|
|
* License version 2. This program is licensed "as is" without any
|
|
* warranty of any kind, whether express or implied.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/moduleparam.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/miscdevice.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/watchdog.h>
|
|
#include <linux/init.h>
|
|
#include <linux/io.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/err.h>
|
|
#include <linux/of.h>
|
|
#include <mach/bridge-regs.h>
|
|
|
|
/*
|
|
* Watchdog timer block registers.
|
|
*/
|
|
#define TIMER_CTRL 0x0000
|
|
#define WDT_EN 0x0010
|
|
#define WDT_VAL 0x0024
|
|
|
|
#define WDT_MAX_CYCLE_COUNT 0xffffffff
|
|
#define WDT_IN_USE 0
|
|
#define WDT_OK_TO_CLOSE 1
|
|
|
|
static bool nowayout = WATCHDOG_NOWAYOUT;
|
|
static int heartbeat = -1; /* module parameter (seconds) */
|
|
static unsigned int wdt_max_duration; /* (seconds) */
|
|
static struct clk *clk;
|
|
static unsigned int wdt_tclk;
|
|
static void __iomem *wdt_reg;
|
|
static DEFINE_SPINLOCK(wdt_lock);
|
|
|
|
static int orion_wdt_ping(struct watchdog_device *wdt_dev)
|
|
{
|
|
spin_lock(&wdt_lock);
|
|
|
|
/* Reload watchdog duration */
|
|
writel(wdt_tclk * wdt_dev->timeout, wdt_reg + WDT_VAL);
|
|
|
|
spin_unlock(&wdt_lock);
|
|
return 0;
|
|
}
|
|
|
|
static int orion_wdt_start(struct watchdog_device *wdt_dev)
|
|
{
|
|
u32 reg;
|
|
|
|
spin_lock(&wdt_lock);
|
|
|
|
/* Set watchdog duration */
|
|
writel(wdt_tclk * wdt_dev->timeout, wdt_reg + WDT_VAL);
|
|
|
|
/* Clear watchdog timer interrupt */
|
|
reg = readl(BRIDGE_CAUSE);
|
|
reg &= ~WDT_INT_REQ;
|
|
writel(reg, BRIDGE_CAUSE);
|
|
|
|
/* Enable watchdog timer */
|
|
reg = readl(wdt_reg + TIMER_CTRL);
|
|
reg |= WDT_EN;
|
|
writel(reg, wdt_reg + TIMER_CTRL);
|
|
|
|
/* Enable reset on watchdog */
|
|
reg = readl(RSTOUTn_MASK);
|
|
reg |= WDT_RESET_OUT_EN;
|
|
writel(reg, RSTOUTn_MASK);
|
|
|
|
spin_unlock(&wdt_lock);
|
|
return 0;
|
|
}
|
|
|
|
static int orion_wdt_stop(struct watchdog_device *wdt_dev)
|
|
{
|
|
u32 reg;
|
|
|
|
spin_lock(&wdt_lock);
|
|
|
|
/* Disable reset on watchdog */
|
|
reg = readl(RSTOUTn_MASK);
|
|
reg &= ~WDT_RESET_OUT_EN;
|
|
writel(reg, RSTOUTn_MASK);
|
|
|
|
/* Disable watchdog timer */
|
|
reg = readl(wdt_reg + TIMER_CTRL);
|
|
reg &= ~WDT_EN;
|
|
writel(reg, wdt_reg + TIMER_CTRL);
|
|
|
|
spin_unlock(&wdt_lock);
|
|
return 0;
|
|
}
|
|
|
|
static unsigned int orion_wdt_get_timeleft(struct watchdog_device *wdt_dev)
|
|
{
|
|
unsigned int time_left;
|
|
|
|
spin_lock(&wdt_lock);
|
|
time_left = readl(wdt_reg + WDT_VAL) / wdt_tclk;
|
|
spin_unlock(&wdt_lock);
|
|
|
|
return time_left;
|
|
}
|
|
|
|
static int orion_wdt_set_timeout(struct watchdog_device *wdt_dev,
|
|
unsigned int timeout)
|
|
{
|
|
wdt_dev->timeout = timeout;
|
|
return 0;
|
|
}
|
|
|
|
static const struct watchdog_info orion_wdt_info = {
|
|
.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
|
|
.identity = "Orion Watchdog",
|
|
};
|
|
|
|
static const struct watchdog_ops orion_wdt_ops = {
|
|
.owner = THIS_MODULE,
|
|
.start = orion_wdt_start,
|
|
.stop = orion_wdt_stop,
|
|
.ping = orion_wdt_ping,
|
|
.set_timeout = orion_wdt_set_timeout,
|
|
.get_timeleft = orion_wdt_get_timeleft,
|
|
};
|
|
|
|
static struct watchdog_device orion_wdt = {
|
|
.info = &orion_wdt_info,
|
|
.ops = &orion_wdt_ops,
|
|
};
|
|
|
|
static int __devinit orion_wdt_probe(struct platform_device *pdev)
|
|
{
|
|
struct resource *res;
|
|
int ret;
|
|
|
|
clk = devm_clk_get(&pdev->dev, NULL);
|
|
if (IS_ERR(clk)) {
|
|
dev_err(&pdev->dev, "Orion Watchdog missing clock\n");
|
|
return -ENODEV;
|
|
}
|
|
clk_prepare_enable(clk);
|
|
wdt_tclk = clk_get_rate(clk);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
wdt_reg = devm_ioremap(&pdev->dev, res->start, resource_size(res));
|
|
if (!wdt_reg)
|
|
return -ENOMEM;
|
|
|
|
wdt_max_duration = WDT_MAX_CYCLE_COUNT / wdt_tclk;
|
|
|
|
if ((heartbeat < 1) || (heartbeat > wdt_max_duration))
|
|
heartbeat = wdt_max_duration;
|
|
|
|
orion_wdt.timeout = heartbeat;
|
|
orion_wdt.min_timeout = 1;
|
|
orion_wdt.max_timeout = wdt_max_duration;
|
|
|
|
watchdog_set_nowayout(&orion_wdt, nowayout);
|
|
ret = watchdog_register_device(&orion_wdt);
|
|
if (ret) {
|
|
clk_disable_unprepare(clk);
|
|
return ret;
|
|
}
|
|
|
|
pr_info("Initial timeout %d sec%s\n",
|
|
heartbeat, nowayout ? ", nowayout" : "");
|
|
return 0;
|
|
}
|
|
|
|
static int __devexit orion_wdt_remove(struct platform_device *pdev)
|
|
{
|
|
watchdog_unregister_device(&orion_wdt);
|
|
clk_disable_unprepare(clk);
|
|
return 0;
|
|
}
|
|
|
|
static void orion_wdt_shutdown(struct platform_device *pdev)
|
|
{
|
|
orion_wdt_stop(&orion_wdt);
|
|
}
|
|
|
|
static const struct of_device_id orion_wdt_of_match_table[] __devinitdata = {
|
|
{ .compatible = "marvell,orion-wdt", },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, orion_wdt_of_match_table);
|
|
|
|
static struct platform_driver orion_wdt_driver = {
|
|
.probe = orion_wdt_probe,
|
|
.remove = __devexit_p(orion_wdt_remove),
|
|
.shutdown = orion_wdt_shutdown,
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "orion_wdt",
|
|
.of_match_table = of_match_ptr(orion_wdt_of_match_table),
|
|
},
|
|
};
|
|
|
|
module_platform_driver(orion_wdt_driver);
|
|
|
|
MODULE_AUTHOR("Sylver Bruneau <sylver.bruneau@googlemail.com>");
|
|
MODULE_DESCRIPTION("Orion Processor Watchdog");
|
|
|
|
module_param(heartbeat, int, 0);
|
|
MODULE_PARM_DESC(heartbeat, "Initial watchdog heartbeat in seconds");
|
|
|
|
module_param(nowayout, bool, 0);
|
|
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
|
|
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
|