32 static int get_sem(struct device *dev, u32 *sem)  in get_sem()  argument
40 		dev_err(dev, "iosf failed to read punit semaphore\n");  in get_sem()
49 static void reset_semaphore(struct device *dev)  in reset_semaphore()  argument
55 		dev_err(dev, "iosf failed to reset punit semaphore during read\n");  in reset_semaphore()
62 		dev_err(dev, "iosf failed to reset punit semaphore during write\n");  in reset_semaphore()
65 static int baytrail_i2c_acquire(struct dw_i2c_dev *dev)  in baytrail_i2c_acquire()  argument
73 	if (!dev || !dev->dev)  in baytrail_i2c_acquire()
76 	if (!dev->release_lock)  in baytrail_i2c_acquire()
83 		dev_err(dev->dev, "iosf punit semaphore request failed\n");  in baytrail_i2c_acquire()
91 		ret = get_sem(dev->dev, &sem);  in baytrail_i2c_acquire()
94 			dev_dbg(dev->dev, "punit semaphore acquired after %ums\n",  in baytrail_i2c_acquire()
102 	dev_err(dev->dev, "punit semaphore timed out, resetting\n");  in baytrail_i2c_acquire()
103 	reset_semaphore(dev->dev);  in baytrail_i2c_acquire()
108 		dev_err(dev->dev, "iosf failed to read punit semaphore\n");  in baytrail_i2c_acquire()
110 		dev_err(dev->dev, "PUNIT SEM: %d\n", sem);  in baytrail_i2c_acquire()
117 static void baytrail_i2c_release(struct dw_i2c_dev *dev)  in baytrail_i2c_release()  argument
119 	if (!dev || !dev->dev)  in baytrail_i2c_release()
122 	if (!dev->acquire_lock)  in baytrail_i2c_release()
125 	reset_semaphore(dev->dev);  in baytrail_i2c_release()
126 	dev_dbg(dev->dev, "punit semaphore held for %ums\n",  in baytrail_i2c_release()
130 int i2c_dw_eval_lock_support(struct dw_i2c_dev *dev)  in i2c_dw_eval_lock_support()  argument
136 	if (!dev || !dev->dev)  in i2c_dw_eval_lock_support()
139 	handle = ACPI_HANDLE(dev->dev);  in i2c_dw_eval_lock_support()
148 		dev_info(dev->dev, "I2C bus managed by PUNIT\n");  in i2c_dw_eval_lock_support()
149 		dev->acquire_lock = baytrail_i2c_acquire;  in i2c_dw_eval_lock_support()
150 		dev->release_lock = baytrail_i2c_release;  in i2c_dw_eval_lock_support()
151 		dev->pm_runtime_disabled = true;  in i2c_dw_eval_lock_support()