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Message-ID: <20091204132430.GD3772@infomag.iguana.be>
Date: Fri, 4 Dec 2009 14:24:30 +0100
From: Wim Van Sebroeck <wim@...ana.be>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
LKML <linux-kernel@...r.kernel.org>,
Ben Dooks <ben@...tec.co.uk>,
Seth Heasley <seth.heasley@...el.com>
Subject: [WATCHDOG] v2.6.33-rc patches
Hi Linus,
Please pull from 'master' branch of
git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog.git
or if master.kernel.org hasn't synced up yet:
master.kernel.org:/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog.git
This will update the following files:
drivers/watchdog/iTCO_wdt.c | 68 +++++++++++--------------------
drivers/watchdog/s3c2410_wdt.c | 89 +++++++++++++++++++++++++++++++++++++++--
2 files changed, 112 insertions(+), 45 deletions(-)
with these Changes:
Author: Wim Van Sebroeck <wim@...ana.be>
Date: Sun Nov 15 13:44:54 2009 +0000
[WATCHDOG] iTCO_wdt.c - cleanup chipset documentation
Cleanup the documentation about the supported chipsets.
Signed-off-by: Wim Van Sebroeck <wim@...ana.be>
Author: Seth Heasley <seth.heasley@...el.com>
Date: Wed Nov 11 02:24:01 2009 +0100
[WATCHDOG] iTCO_wdt: Add support for Intel Ibex Peak
Add the Intel Ibex Peak (PCH) Device IDs to iTCO_wdt.c.
Signed-off-by: Seth Heasley <seth.heasley@...el.com>
Signed-off-by: Wim Van Sebroeck <wim@...ana.be>
Author: Ben Dooks <ben@...tec.co.uk>
Date: Fri Oct 30 00:30:25 2009 +0000
[WATCHDOG] CPUFREQ: S3C24XX Watchdog frequency scaling support.
Add support for CPU frequency scaling to the S3C24XX Watchdog
driver.
Signed-off-by: Simtec Linux Team <linux@...tec.co.uk>
Signed-off-by: Ben Dooks <ben@...tec.co.uk>
Signed-off-by: Wim Van Sebroeck <wim@...ana.be>
The Changes can also be looked at on:
http://www.kernel.org/git/?p=linux/kernel/git/wim/linux-2.6-watchdog.git;a=summary
For completeness, I added the overal diff below.
Greetings,
Wim.
================================================================================
diff --git a/drivers/watchdog/iTCO_wdt.c b/drivers/watchdog/iTCO_wdt.c
index 6a51edd..e44fbb3 100644
--- a/drivers/watchdog/iTCO_wdt.c
+++ b/drivers/watchdog/iTCO_wdt.c
@@ -1,5 +1,5 @@
/*
- * intel TCO Watchdog Driver (Used in i82801 and i63xxESB chipsets)
+ * intel TCO Watchdog Driver
*
* (c) Copyright 2006-2009 Wim Van Sebroeck <wim@...ana.be>.
*
@@ -14,47 +14,22 @@
*
* The TCO watchdog is implemented in the following I/O controller hubs:
* (See the intel documentation on http://developer.intel.com.)
- * 82801AA (ICH) : document number 290655-003, 290677-014,
- * 82801AB (ICHO) : document number 290655-003, 290677-014,
- * 82801BA (ICH2) : document number 290687-002, 298242-027,
- * 82801BAM (ICH2-M) : document number 290687-002, 298242-027,
- * 82801CA (ICH3-S) : document number 290733-003, 290739-013,
- * 82801CAM (ICH3-M) : document number 290716-001, 290718-007,
- * 82801DB (ICH4) : document number 290744-001, 290745-025,
- * 82801DBM (ICH4-M) : document number 252337-001, 252663-008,
- * 82801E (C-ICH) : document number 273599-001, 273645-002,
- * 82801EB (ICH5) : document number 252516-001, 252517-028,
- * 82801ER (ICH5R) : document number 252516-001, 252517-028,
- * 6300ESB (6300ESB) : document number 300641-004, 300884-013,
- * 82801FB (ICH6) : document number 301473-002, 301474-026,
- * 82801FR (ICH6R) : document number 301473-002, 301474-026,
- * 82801FBM (ICH6-M) : document number 301473-002, 301474-026,
- * 82801FW (ICH6W) : document number 301473-001, 301474-026,
- * 82801FRW (ICH6RW) : document number 301473-001, 301474-026,
- * 631xESB (631xESB) : document number 313082-001, 313075-006,
- * 632xESB (632xESB) : document number 313082-001, 313075-006,
- * 82801GB (ICH7) : document number 307013-003, 307014-024,
- * 82801GR (ICH7R) : document number 307013-003, 307014-024,
- * 82801GDH (ICH7DH) : document number 307013-003, 307014-024,
- * 82801GBM (ICH7-M) : document number 307013-003, 307014-024,
- * 82801GHM (ICH7-M DH) : document number 307013-003, 307014-024,
- * 82801GU (ICH7-U) : document number 307013-003, 307014-024,
- * 82801HB (ICH8) : document number 313056-003, 313057-017,
- * 82801HR (ICH8R) : document number 313056-003, 313057-017,
- * 82801HBM (ICH8M) : document number 313056-003, 313057-017,
- * 82801HH (ICH8DH) : document number 313056-003, 313057-017,
- * 82801HO (ICH8DO) : document number 313056-003, 313057-017,
- * 82801HEM (ICH8M-E) : document number 313056-003, 313057-017,
- * 82801IB (ICH9) : document number 316972-004, 316973-012,
- * 82801IR (ICH9R) : document number 316972-004, 316973-012,
- * 82801IH (ICH9DH) : document number 316972-004, 316973-012,
- * 82801IO (ICH9DO) : document number 316972-004, 316973-012,
- * 82801IBM (ICH9M) : document number 316972-004, 316973-012,
- * 82801IEM (ICH9M-E) : document number 316972-004, 316973-012,
- * 82801JIB (ICH10) : document number 319973-002, 319974-002,
- * 82801JIR (ICH10R) : document number 319973-002, 319974-002,
- * 82801JD (ICH10D) : document number 319973-002, 319974-002,
- * 82801JDO (ICH10DO) : document number 319973-002, 319974-002
+ * document number 290655-003, 290677-014: 82801AA (ICH), 82801AB (ICHO)
+ * document number 290687-002, 298242-027: 82801BA (ICH2)
+ * document number 290733-003, 290739-013: 82801CA (ICH3-S)
+ * document number 290716-001, 290718-007: 82801CAM (ICH3-M)
+ * document number 290744-001, 290745-025: 82801DB (ICH4)
+ * document number 252337-001, 252663-008: 82801DBM (ICH4-M)
+ * document number 273599-001, 273645-002: 82801E (C-ICH)
+ * document number 252516-001, 252517-028: 82801EB (ICH5), 82801ER (ICH5R)
+ * document number 300641-004, 300884-013: 6300ESB
+ * document number 301473-002, 301474-026: 82801F (ICH6)
+ * document number 313082-001, 313075-006: 631xESB, 632xESB
+ * document number 307013-003, 307014-024: 82801G (ICH7)
+ * document number 313056-003, 313057-017: 82801H (ICH8)
+ * document number 316972-004, 316973-012: 82801I (ICH9)
+ * document number 319973-002, 319974-002: 82801J (ICH10)
+ * document number 322169-001, 322170-001: 5 Series, 3400 Series (PCH)
*/
/*
@@ -122,6 +97,9 @@ enum iTCO_chipsets {
TCO_ICH10R, /* ICH10R */
TCO_ICH10D, /* ICH10D */
TCO_ICH10DO, /* ICH10DO */
+ TCO_PCH, /* PCH Desktop Full Featured */
+ TCO_PCHM, /* PCH Mobile Full Featured */
+ TCO_PCHMSFF, /* PCH Mobile SFF Full Featured */
};
static struct {
@@ -162,6 +140,9 @@ static struct {
{"ICH10R", 2},
{"ICH10D", 2},
{"ICH10DO", 2},
+ {"PCH Desktop Full Featured", 2},
+ {"PCH Mobile Full Featured", 2},
+ {"PCH Mobile SFF Full Featured", 2},
{NULL, 0}
};
@@ -230,6 +211,9 @@ static struct pci_device_id iTCO_wdt_pci_tbl[] = {
{ ITCO_PCI_DEVICE(0x3a16, TCO_ICH10R)},
{ ITCO_PCI_DEVICE(0x3a1a, TCO_ICH10D)},
{ ITCO_PCI_DEVICE(0x3a14, TCO_ICH10DO)},
+ { ITCO_PCI_DEVICE(0x3b00, TCO_PCH)},
+ { ITCO_PCI_DEVICE(0x3b01, TCO_PCHM)},
+ { ITCO_PCI_DEVICE(0x3b0d, TCO_PCHMSFF)},
{ 0, }, /* End of list */
};
MODULE_DEVICE_TABLE(pci, iTCO_wdt_pci_tbl);
diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c
index b57ac6b..85b93e1 100644
--- a/drivers/watchdog/s3c2410_wdt.c
+++ b/drivers/watchdog/s3c2410_wdt.c
@@ -36,6 +36,7 @@
#include <linux/clk.h>
#include <linux/uaccess.h>
#include <linux/io.h>
+#include <linux/cpufreq.h>
#include <mach/map.h>
@@ -142,9 +143,14 @@ static void s3c2410wdt_start(void)
spin_unlock(&wdt_lock);
}
+static inline int s3c2410wdt_is_running(void)
+{
+ return readl(wdt_base + S3C2410_WTCON) & S3C2410_WTCON_ENABLE;
+}
+
static int s3c2410wdt_set_heartbeat(int timeout)
{
- unsigned int freq = clk_get_rate(wdt_clock);
+ unsigned long freq = clk_get_rate(wdt_clock);
unsigned int count;
unsigned int divisor = 1;
unsigned long wtcon;
@@ -155,7 +161,7 @@ static int s3c2410wdt_set_heartbeat(int timeout)
freq /= 128;
count = timeout * freq;
- DBG("%s: count=%d, timeout=%d, freq=%d\n",
+ DBG("%s: count=%d, timeout=%d, freq=%lu\n",
__func__, count, timeout, freq);
/* if the count is bigger than the watchdog register,
@@ -324,6 +330,73 @@ static irqreturn_t s3c2410wdt_irq(int irqno, void *param)
s3c2410wdt_keepalive();
return IRQ_HANDLED;
}
+
+
+#ifdef CONFIG_CPU_FREQ
+
+static int s3c2410wdt_cpufreq_transition(struct notifier_block *nb,
+ unsigned long val, void *data)
+{
+ int ret;
+
+ if (!s3c2410wdt_is_running())
+ goto done;
+
+ if (val == CPUFREQ_PRECHANGE) {
+ /* To ensure that over the change we don't cause the
+ * watchdog to trigger, we perform an keep-alive if
+ * the watchdog is running.
+ */
+
+ s3c2410wdt_keepalive();
+ } else if (val == CPUFREQ_POSTCHANGE) {
+ s3c2410wdt_stop();
+
+ ret = s3c2410wdt_set_heartbeat(tmr_margin);
+
+ if (ret >= 0)
+ s3c2410wdt_start();
+ else
+ goto err;
+ }
+
+done:
+ return 0;
+
+ err:
+ dev_err(wdt_dev, "cannot set new value for timeout %d\n", tmr_margin);
+ return ret;
+}
+
+static struct notifier_block s3c2410wdt_cpufreq_transition_nb = {
+ .notifier_call = s3c2410wdt_cpufreq_transition,
+};
+
+static inline int s3c2410wdt_cpufreq_register(void)
+{
+ return cpufreq_register_notifier(&s3c2410wdt_cpufreq_transition_nb,
+ CPUFREQ_TRANSITION_NOTIFIER);
+}
+
+static inline void s3c2410wdt_cpufreq_deregister(void)
+{
+ cpufreq_unregister_notifier(&s3c2410wdt_cpufreq_transition_nb,
+ CPUFREQ_TRANSITION_NOTIFIER);
+}
+
+#else
+static inline int s3c2410wdt_cpufreq_register(void)
+{
+ return 0;
+}
+
+static inline void s3c2410wdt_cpufreq_deregister(void)
+{
+}
+#endif
+
+
+
/* device interface */
static int __devinit s3c2410wdt_probe(struct platform_device *pdev)
@@ -387,6 +460,11 @@ static int __devinit s3c2410wdt_probe(struct platform_device *pdev)
clk_enable(wdt_clock);
+ if (s3c2410wdt_cpufreq_register() < 0) {
+ printk(KERN_ERR PFX "failed to register cpufreq\n");
+ goto err_clk;
+ }
+
/* see if we can actually set the requested timer margin, and if
* not, try the default value */
@@ -407,7 +485,7 @@ static int __devinit s3c2410wdt_probe(struct platform_device *pdev)
if (ret) {
dev_err(dev, "cannot register miscdev on minor=%d (%d)\n",
WATCHDOG_MINOR, ret);
- goto err_clk;
+ goto err_cpufreq;
}
if (tmr_atboot && started == 0) {
@@ -432,6 +510,9 @@ static int __devinit s3c2410wdt_probe(struct platform_device *pdev)
return 0;
+ err_cpufreq:
+ s3c2410wdt_cpufreq_deregister();
+
err_clk:
clk_disable(wdt_clock);
clk_put(wdt_clock);
@@ -451,6 +532,8 @@ static int __devinit s3c2410wdt_probe(struct platform_device *pdev)
static int __devexit s3c2410wdt_remove(struct platform_device *dev)
{
+ s3c2410wdt_cpufreq_deregister();
+
release_resource(wdt_mem);
kfree(wdt_mem);
wdt_mem = NULL;
--
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