diff options
Diffstat (limited to 'drivers/watchdog')
| -rw-r--r-- | drivers/watchdog/iTCO_wdt.c | 68 | ||||
| -rw-r--r-- | drivers/watchdog/s3c2410_wdt.c | 89 |
2 files changed, 112 insertions, 45 deletions
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@iguana.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; |