i2c: designware: Cleanup bus lock handling

Now that most of the special Bay- / Cherry-Trail bus lock handling has
been moved to the iosf_mbi code we can simplify the remaining code a bit.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/i2c/busses/i2c-designware-baytrail.c

@@ -12,16 +12,6 @@
 
 #include "i2c-designware-core.h"
 
-static int baytrail_i2c_acquire(struct dw_i2c_dev *dev)
-{
-	return iosf_mbi_block_punit_i2c_access();
-}
-
-static void baytrail_i2c_release(struct dw_i2c_dev *dev)
-{
-	iosf_mbi_unblock_punit_i2c_access();
-}
-
 int i2c_dw_probe_lock_support(struct dw_i2c_dev *dev)
 {
 	acpi_status status;
@@ -46,13 +36,9 @@ int i2c_dw_probe_lock_support(struct dw_i2c_dev *dev)
 		return -EPROBE_DEFER;
 
 	dev_info(dev->dev, "I2C bus managed by PUNIT\n");
-	dev->acquire_lock = baytrail_i2c_acquire;
-	dev->release_lock = baytrail_i2c_release;
+	dev->acquire_lock = iosf_mbi_block_punit_i2c_access;
+	dev->release_lock = iosf_mbi_unblock_punit_i2c_access;
 	dev->pm_disabled = true;
 
 	return 0;
 }
-
-void i2c_dw_remove_lock_support(struct dw_i2c_dev *dev)
-{
-}

drivers/i2c/busses/i2c-designware-common.c

@@ -267,7 +267,7 @@ int i2c_dw_acquire_lock(struct dw_i2c_dev *dev)
 	if (!dev->acquire_lock)
 		return 0;
 
-	ret = dev->acquire_lock(dev);
+	ret = dev->acquire_lock();
 	if (!ret)
 		return 0;
 
@@ -279,7 +279,7 @@ int i2c_dw_acquire_lock(struct dw_i2c_dev *dev)
 void i2c_dw_release_lock(struct dw_i2c_dev *dev)
 {
 	if (dev->release_lock)
-		dev->release_lock(dev);
+		dev->release_lock();
 }
 
 /*

drivers/i2c/busses/i2c-designware-core.h

@@ -10,7 +10,6 @@
  */
 
 #include <linux/i2c.h>
-#include <linux/pm_qos.h>
 
 #define DW_IC_DEFAULT_FUNCTIONALITY (I2C_FUNC_I2C |			\
 					I2C_FUNC_SMBUS_BYTE |		\
@@ -209,7 +208,6 @@
  * @fp_lcnt: fast plus LCNT value
  * @hs_hcnt: high speed HCNT value
  * @hs_lcnt: high speed LCNT value
- * @pm_qos: pm_qos_request used while holding a hardware lock on the bus
  * @acquire_lock: function to acquire a hardware lock on the bus
  * @release_lock: function to release a hardware lock on the bus
  * @pm_disabled: true if power-management should be disabled for this i2c-bus
@@ -262,9 +260,8 @@ struct dw_i2c_dev {
 	u16			fp_lcnt;
 	u16			hs_hcnt;
 	u16			hs_lcnt;
-	struct pm_qos_request	pm_qos;
-	int			(*acquire_lock)(struct dw_i2c_dev *dev);
-	void			(*release_lock)(struct dw_i2c_dev *dev);
+	int			(*acquire_lock)(void);
+	void			(*release_lock)(void);
 	bool			pm_disabled;
 	void			(*disable)(struct dw_i2c_dev *dev);
 	void			(*disable_int)(struct dw_i2c_dev *dev);
@@ -317,8 +314,6 @@ static inline int i2c_dw_probe_slave(struct dw_i2c_dev *dev) { return -EINVAL; }
 
 #if IS_ENABLED(CONFIG_I2C_DESIGNWARE_BAYTRAIL)
 extern int i2c_dw_probe_lock_support(struct dw_i2c_dev *dev);
-extern void i2c_dw_remove_lock_support(struct dw_i2c_dev *dev);
 #else
 static inline int i2c_dw_probe_lock_support(struct dw_i2c_dev *dev) { return 0; }
-static inline void i2c_dw_remove_lock_support(struct dw_i2c_dev *dev) {}
 #endif

drivers/i2c/busses/i2c-designware-platdrv.c

@@ -388,8 +388,6 @@ static int dw_i2c_plat_remove(struct platform_device *pdev)
 	if (!IS_ERR_OR_NULL(dev->rst))
 		reset_control_assert(dev->rst);
 
-	i2c_dw_remove_lock_support(dev);
-
 	return 0;
 }