3 files changed, 47 insertions, 4 deletions

diff --git a/drivers/misc/atmel-ssc.c b/drivers/misc/atmel-ssc.c
index 158da5a81a66..3c09cbb70b1d 100644
--- a/drivers/misc/atmel-ssc.c
+++ b/drivers/misc/atmel-ssc.c
@@ -19,6 +19,7 @@
 #include <linux/module.h>
 
 #include <linux/of.h>
+#include <linux/pinctrl/consumer.h>
 
 /* Serialize access to ssc_list and user count */
 static DEFINE_SPINLOCK(user_lock);
@@ -131,6 +132,13 @@ static int ssc_probe(struct platform_device *pdev)
         struct resource *regs;
         struct ssc_device *ssc;
         const struct atmel_ssc_platform_data *plat_dat;
+        struct pinctrl *pinctrl;
+
+        pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
+        if (IS_ERR(pinctrl)) {
+                dev_err(&pdev->dev, "Failed to request pinctrl\n");
+                return PTR_ERR(pinctrl);
+        }
 
         ssc = devm_kzalloc(&pdev->dev, sizeof(struct ssc_device), GFP_KERNEL);
         if (!ssc) {
diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c
index 18794aea6062..e40ffd9502d1 100644
--- a/drivers/misc/mei/amthif.c
+++ b/drivers/misc/mei/amthif.c
@@ -187,13 +187,13 @@ int mei_amthif_read(struct mei_device *dev, struct file *file,
                 wait_ret = wait_event_interruptible(dev->iamthif_cl.wait,
                         (cb = mei_amthif_find_read_list_entry(dev, file)));
 
+                /* Locking again the Mutex */
+                mutex_lock(&dev->device_lock);
+
                 if (wait_ret)
                         return -ERESTARTSYS;
 
                 dev_dbg(&dev->pdev->dev, "woke up from sleep\n");
-
-                /* Locking again the Mutex */
-                mutex_lock(&dev->device_lock);
         }
 
 
diff --git a/drivers/misc/ti-st/st_kim.c b/drivers/misc/ti-st/st_kim.c
index 9ff942a346ed..83269f1d16e3 100644
--- a/drivers/misc/ti-st/st_kim.c
+++ b/drivers/misc/ti-st/st_kim.c
@@ -468,6 +468,11 @@ long st_kim_start(void *kim_data)
                 if (pdata->chip_enable)
                         pdata->chip_enable(kim_gdata);
 
+                /* Configure BT nShutdown to HIGH state */
+                gpio_set_value(kim_gdata->nshutdown, GPIO_LOW);
+                mdelay(5);      /* FIXME: a proper toggle */
+                gpio_set_value(kim_gdata->nshutdown, GPIO_HIGH);
+                mdelay(100);
                 /* re-initialize the completion */
                 INIT_COMPLETION(kim_gdata->ldisc_installed);
                 /* send notification to UIM */
@@ -509,7 +514,8 @@ long st_kim_start(void *kim_data)
  *      (b) upon failure to either install ldisc or download firmware.
  *      The function is responsible to (a) notify UIM about un-installation,
  *      (b) flush UART if the ldisc was installed.
- *      (c) invoke platform's chip disabling routine.
+ *      (c) reset BT_EN - pull down nshutdown at the end.
+ *      (d) invoke platform's chip disabling routine.
  */
 long st_kim_stop(void *kim_data)
 {
@@ -541,6 +547,13 @@ long st_kim_stop(void *kim_data)
                 err = -ETIMEDOUT;
         }
 
+        /* By default configure BT nShutdown to LOW state */
+        gpio_set_value(kim_gdata->nshutdown, GPIO_LOW);
+        mdelay(1);
+        gpio_set_value(kim_gdata->nshutdown, GPIO_HIGH);
+        mdelay(1);
+        gpio_set_value(kim_gdata->nshutdown, GPIO_LOW);
+
         /* platform specific disable */
         if (pdata->chip_disable)
                 pdata->chip_disable(kim_gdata);
@@ -733,6 +746,20 @@ static int kim_probe(struct platform_device *pdev)
         /* refer to itself */
         kim_gdata->core_data->kim_data = kim_gdata;
 
+        /* Claim the chip enable nShutdown gpio from the system */
+        kim_gdata->nshutdown = pdata->nshutdown_gpio;
+        err = gpio_request(kim_gdata->nshutdown, "kim");
+        if (unlikely(err)) {
+                pr_err(" gpio %ld request failed ", kim_gdata->nshutdown);
+                return err;
+        }
+
+        /* Configure nShutdown GPIO as output=0 */
+        err = gpio_direction_output(kim_gdata->nshutdown, 0);
+        if (unlikely(err)) {
+                pr_err(" unable to configure gpio %ld", kim_gdata->nshutdown);
+                return err;
+        }
         /* get reference of pdev for request_firmware
          */
         kim_gdata->kim_pdev = pdev;
@@ -779,10 +806,18 @@ err_core_init:
 
 static int kim_remove(struct platform_device *pdev)
 {
+        /* free the GPIOs requested */
+        struct ti_st_plat_data  *pdata = pdev->dev.platform_data;
         struct kim_data_s       *kim_gdata;
 
         kim_gdata = dev_get_drvdata(&pdev->dev);
 
+        /* Free the Bluetooth/FM/GPIO
+         * nShutdown gpio from the system
+         */
+        gpio_free(pdata->nshutdown_gpio);
+        pr_info("nshutdown GPIO Freed");
+
         debugfs_remove_recursive(kim_debugfs_dir);
         sysfs_remove_group(&pdev->dev.kobj, &uim_attr_grp);
         pr_info("sysfs entries removed");