Merge tag 'f2fs-for-3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk...

[karo-tx-linux.git] / drivers / mfd / ab8500-sysctrl.c

diff --git a/drivers/mfd/ab8500-sysctrl.c b/drivers/mfd/ab8500-sysctrl.c
index 8a33b2c7eeadf1ec900ae80ce0755ef37d19fbc4..108fd86552f0329df01bd905f4109882e236ba62 100644 (file)
--- a/drivers/mfd/ab8500-sysctrl.c
+++ b/drivers/mfd/ab8500-sysctrl.c
@@ -7,12 +7,73 @@
 #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>
 
 static struct device *sysctrl_dev;
 
+void ab8500_power_off(void)
+{
+       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);
+
+       if (!sigprocmask(SIG_BLOCK, &all, &old)) {
+               (void)ab8500_sysctrl_set(AB8500_STW4500CTRL1,
+                                        AB8500_STW4500CTRL1_SWOFF |
+                                        AB8500_STW4500CTRL1_SWRESET4500N);
+               (void)sigprocmask(SIG_SETMASK, &old, NULL);
+       }
+}
+
 static inline bool valid_bank(u8 bank)
 {
        return ((bank == AB8500_SYS_CTRL1_BLOCK) ||
@@ -33,6 +94,7 @@ 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 +110,40 @@ 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 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;
+
+       pdata = plat->sysctrl;
+
+       if (pdata) {
+               int ret, i, 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;
 }