[PATCH v3 3/3] i2c: designware: Cleanup bus lock handling

Hans de Goede
2018-10-11T14:29:54Z

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>
---
drivers/i2c/busses/i2c-designware-baytrail.c | 18 ++----------------
drivers/i2c/busses/i2c-designware-common.c | 4 ++--
drivers/i2c/busses/i2c-designware-core.h | 9 ++-------
drivers/i2c/busses/i2c-designware-platdrv.c | 2 --
4 files changed, 6 insertions(+), 27 deletions(-)

diff --git a/drivers/i2c/busses/i2c-designware-baytrail.c b/drivers/i2c/busses/i2c-designware-baytrail.c
index 8c84fa0b0384..33da07d64494 100644
--- a/drivers/i2c/busses/i2c-designware-baytrail.c
+++ b/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->shared_with_punit = true;

return 0;
}
-
-void i2c_dw_remove_lock_support(struct dw_i2c_dev *dev)
-{
-}
diff --git a/drivers/i2c/busses/i2c-designware-common.c b/drivers/i2c/busses/i2c-designware-common.c
index 36271cd75342..a4730111d290 100644
--- a/drivers/i2c/busses/i2c-designware-common.c
+++ b/drivers/i2c/busses/i2c-designware-common.c
@@ -269,7 +269,7 @@ 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;

@@ -281,7 +281,7 @@ 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();
}

/*
diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h
index 9ec8394f4787..b4a0b2b99a78 100644
--- a/drivers/i2c/busses/i2c-designware-core.h
+++ b/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
* @shared_with_punit: true if this bus is shared with the SoCs PUNIT
@@ -263,9 +261,8 @@ 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 shared_with_punit;
void (*disable)(struct dw_i2c_dev *dev);
void (*disable_int)(struct dw_i2c_dev *dev);
@@ -322,8 +319,6 @@ 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
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index 997bbb3d925f..9eaac3be1f63 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -418,8 +418,6 @@ 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;
}

--
2.19.0