diff options
| author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2020-03-17 17:33:20 +0100 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-03-19 08:13:04 +0100 |
| commit | 12632459f11a3e082207d48dca53555dfcf95585 (patch) | |
| tree | 5a81ba0e76ee054dd850d668111e145e644af27a /drivers/soundwire | |
| parent | soundwire: cadence: mask Slave interrupt before stopping clock (diff) | |
| download | linux-12632459f11a3e082207d48dca53555dfcf95585.tar.xz linux-12632459f11a3e082207d48dca53555dfcf95585.zip | |
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>
Diffstat (limited to 'drivers/soundwire')
| -rw-r--r-- | drivers/soundwire/cadence_master.c | 28 |
1 files changed, 8 insertions, 20 deletions
diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c index 613c63359413..7d9fc2c645e3 100644 --- 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 |