soundwire: cadence: merge routines to clear/set bits

Use a single loop to wait for hardware to set/clear fields.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200317163329.25501-9-pierre-louis.bossart@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c
index 613c633..7d9fc2c 100644 (file)
--- a/drivers/soundwire/cadence_master.c
+++ b/drivers/soundwire/cadence_master.c
@@ -211,26 +211,6 @@ static inline void cdns_updatel(struct sdw_cdns *cdns,
        cdns_writel(cdns, offset, tmp);
 }
 
-static int cdns_clear_bit(struct sdw_cdns *cdns, int offset, u32 value)
-{
-       int timeout = 10;
-       u32 reg_read;
-
-       writel(value, cdns->registers + offset);
-
-       /* Wait for bit to be self cleared */
-       do {
-               reg_read = readl(cdns->registers + offset);
-               if ((reg_read & value) == 0)
-                       return 0;
-
-               timeout--;
-               udelay(50);
-       } while (timeout != 0);
-
-       return -EAGAIN;
-}
-
 static int cdns_set_wait(struct sdw_cdns *cdns, int offset, u32 mask, u32 value)
 {
        int timeout = 10;
@@ -249,6 +229,14 @@ static int cdns_set_wait(struct sdw_cdns *cdns, int offset, u32 mask, u32 value)
        return -ETIMEDOUT;
 }
 
+static int cdns_clear_bit(struct sdw_cdns *cdns, int offset, u32 value)
+{
+       writel(value, cdns->registers + offset);
+
+       /* Wait for bit to be self cleared */
+       return cdns_set_wait(cdns, offset, value, 0);
+}
+
 /*
  * all changes to the MCP_CONFIG, MCP_CONTROL, MCP_CMDCTRL and MCP_PHYCTRL
  * need to be confirmed with a write to MCP_CONFIG_UPDATE