diff options
Diffstat (limited to 'drivers/mfd/ab8500-sysctrl.c')
| -rw-r--r-- | drivers/mfd/ab8500-sysctrl.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/drivers/mfd/ab8500-sysctrl.c b/drivers/mfd/ab8500-sysctrl.c index c28d4eb1eff..d5865d41514 100644 --- a/drivers/mfd/ab8500-sysctrl.c +++ b/drivers/mfd/ab8500-sysctrl.c @@ -7,12 +7,114 @@ #include <linux/err.h> #include <linux/module.h> #include <linux/platform_device.h> +#include <linux/pm.h> +#include <linux/reboot.h> +#include <linux/signal.h> +#include <linux/power_supply.h> #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"}; + int i; + bool charger_present = false; + union power_supply_propval val; + struct power_supply *psy; + int ret; + + /* + * If we have a charger connected and we're powering off, + * reboot into charge-only mode. + */ + + for (i = 0; i < ARRAY_SIZE(pss); i++) { + psy = power_supply_get_by_name(pss[i]); + if (!psy) + continue; + + ret = psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &val); + + if (!ret && val.intval) { + charger_present = true; + break; + } + } + + if (!charger_present) + goto shutdown; + + /* Check if battery is known */ + psy = power_supply_get_by_name("ab8500_btemp"); + if (psy) { + ret = psy->get_property(psy, POWER_SUPPLY_PROP_TECHNOLOGY, + &val); + if (!ret && val.intval != POWER_SUPPLY_TECHNOLOGY_UNKNOWN) { + printk(KERN_INFO + "Charger \"%s\" is connected with known battery." + " Rebooting.\n", + pss[i]); + machine_restart("charging"); + } + } + +shutdown: + sigfillset(&all); + + plat = dev_get_platdata(sysctrl_dev->parent); + getnstimeofday(&ts); + if (!sigprocmask(SIG_BLOCK, &all, &old)) { + 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) || @@ -33,6 +135,7 @@ int ab8500_sysctrl_read(u16 reg, u8 *value) return abx500_get_register_interruptible(sysctrl_dev, bank, (u8)(reg & 0xFF), value); } +EXPORT_SYMBOL(ab8500_sysctrl_read); int ab8500_sysctrl_write(u16 reg, u8 mask, u8 value) { @@ -48,10 +151,42 @@ int ab8500_sysctrl_write(u16 reg, u8 mask, u8 value) return abx500_mask_and_set_register_interruptible(sysctrl_dev, bank, (u8)(reg & 0xFF), mask, value); } +EXPORT_SYMBOL(ab8500_sysctrl_write); static int __devinit ab8500_sysctrl_probe(struct platform_device *pdev) { + struct ab8500_platform_data *plat; + struct ab8500_sysctrl_platform_data *pdata; + sysctrl_dev = &pdev->dev; + plat = dev_get_platdata(pdev->dev.parent); + if (plat->pm_power_off) + pm_power_off = ab8500_power_off; + hwmon_notifier_register(&ab8500_notifier); + + pdata = plat->sysctrl; + + if (pdata) { + int ret; + int i; + int j; + for (i = AB8500_SYSCLKREQ1RFCLKBUF; + i <= AB8500_SYSCLKREQ8RFCLKBUF; i++) { + j = i - AB8500_SYSCLKREQ1RFCLKBUF; + ret = ab8500_sysctrl_write(i, 0xff, + pdata->initial_req_buf_config[j]); + dev_dbg(&pdev->dev, + "Setting SysClkReq%dRfClkBuf 0x%X\n", + j + 1, + pdata->initial_req_buf_config[j]); + if (ret < 0) { + dev_err(&pdev->dev, + "unable to set sysClkReq%dRfClkBuf: " + "%d\n", j + 1, ret); + } + } + } + return 0; } |