diff options
| author | Daniel Willerud <daniel.willerud@stericsson.com> | 2011-08-25 17:39:18 +0200 |
|---|---|---|
| committer | Philippe Langlais <philippe.langlais@stericsson.com> | 2012-05-22 11:00:51 +0200 |
| commit | d8e4caf56945aed91c1610b6adeb2f23df02cbc4 (patch) | |
| tree | 66ad1c28205d3b10f37aa126fd986bb80c0f05a7 /drivers/mfd | |
| parent | 1232e887f97a3e9ea82b6193cda5e58ba7605736 (diff) | |
ux500: Thermal power off
To determine whether the system had a thermal power off or a regular software
power off upon the next boot, the system must utilize the thermal power off
bit, ThDB8500SWoff, in AB8500 register STw4500Ctrl1.
ST-Ericsson ID: 354533
ST-Ericsson Linux next: N/A
ST-Ericsson FOSS-OUT ID: Trivial
Change-Id: I07440dcdc39a86cb72aa95d86411a1f020b05cae
Signed-off-by: Daniel Willerud <daniel.willerud@stericsson.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/28515
Reviewed-by: QABUILD
Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com>
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/ab8500-sysctrl.c | 50 |
1 files changed, 46 insertions, 4 deletions
diff --git a/drivers/mfd/ab8500-sysctrl.c b/drivers/mfd/ab8500-sysctrl.c index cf58f694539..2a328cfaf43 100644 --- a/drivers/mfd/ab8500-sysctrl.c +++ b/drivers/mfd/ab8500-sysctrl.c @@ -14,11 +14,15 @@ #include <linux/mfd/abx500.h> #include <linux/mfd/abx500/ab8500.h> #include <linux/mfd/abx500/ab8500-sysctrl.h> +#include <linux/time.h> +#include <linux/hwmon.h> static struct device *sysctrl_dev; void ab8500_power_off(void) { + struct ab8500_platform_data *plat; + struct timespec ts; sigset_t old; sigset_t all; static char *pss[] = {"ab8500_ac", "ab8500_usb"}; @@ -66,14 +70,51 @@ void ab8500_power_off(void) shutdown: sigfillset(&all); + plat = dev_get_platdata(sysctrl_dev->parent); + getnstimeofday(&ts); if (!sigprocmask(SIG_BLOCK, &all, &old)) { - (void)ab8500_sysctrl_set(AB8500_STW4500CTRL1, - AB8500_STW4500CTRL1_SWOFF | - AB8500_STW4500CTRL1_SWRESET4500N); - (void)sigprocmask(SIG_SETMASK, &old, NULL); + if (ts.tv_sec == 0 || + (ts.tv_sec - plat->thermal_set_time_sec > + plat->thermal_time_out)) + plat->thermal_power_off_pending = false; + if (!plat->thermal_power_off_pending) { + (void)ab8500_sysctrl_set(AB8500_STW4500CTRL1, + AB8500_STW4500CTRL1_SWOFF | + AB8500_STW4500CTRL1_SWRESET4500N); + (void)sigprocmask(SIG_SETMASK, &old, NULL); + } else { + (void)ab8500_sysctrl_set(AB8500_STW4500CTRL1, + AB8500_STW4500CTRL1_THDB8500SWOFF | + AB8500_STW4500CTRL1_SWRESET4500N); + (void)sigprocmask(SIG_SETMASK, &old, NULL); + } } } +static int ab8500_notifier_call(struct notifier_block *this, + unsigned long val, void *data) +{ + struct ab8500_platform_data *plat; + static struct timespec ts; + if (sysctrl_dev == NULL) + return -EAGAIN; + + plat = dev_get_platdata(sysctrl_dev->parent); + if (val) { + getnstimeofday(&ts); + plat->thermal_set_time_sec = ts.tv_sec; + plat->thermal_power_off_pending = true; + } else { + plat->thermal_set_time_sec = 0; + plat->thermal_power_off_pending = false; + } + return 0; +} + +static struct notifier_block ab8500_notifier = { + .notifier_call = ab8500_notifier_call, +}; + static inline bool valid_bank(u8 bank) { return ((bank == AB8500_SYS_CTRL1_BLOCK) || @@ -118,6 +159,7 @@ static int __devinit ab8500_sysctrl_probe(struct platform_device *pdev) plat = dev_get_platdata(pdev->dev.parent); if (plat->pm_power_off) pm_power_off = ab8500_power_off; + hwmon_notifier_register(&ab8500_notifier); return 0; } |