soundwire: qcom: start the clock during initialization

Start the clock during initialization, doing this explicitly
will add more clarity when we are adding clock stop feature.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210330144719.13284-5-srinivas.kandagatla@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
index edc77d1..0f21674 100644 (file)
--- a/drivers/soundwire/qcom.c
+++ b/drivers/soundwire/qcom.c
@@ -47,6 +47,8 @@
 #define SWRM_MCP_FRAME_CTRL_BANK_ADDR(m)               (0x101C + 0x40 * (m))
 #define SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK                 GENMASK(2, 0)
 #define SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK                 GENMASK(7, 3)
+#define SWRM_MCP_BUS_CTRL                                      0x1044
+#define SWRM_MCP_BUS_CLK_START                                 BIT(1)
 #define SWRM_MCP_CFG_ADDR                                      0x1048
 #define SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_BMSK              GENMASK(21, 17)
 #define SWRM_DEF_CMD_NO_PINGS                                  0x1f
@@ -343,6 +345,7 @@ static int qcom_swrm_init(struct qcom_swrm_ctrl *ctrl)
        u32p_replace_bits(&val, SWRM_DEF_CMD_NO_PINGS, SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_BMSK);
        ctrl->reg_write(ctrl, SWRM_MCP_CFG_ADDR, val);
 
+       ctrl->reg_write(ctrl, SWRM_MCP_BUS_CTRL, SWRM_MCP_BUS_CLK_START);
        /* Configure number of retries of a read/write cmd */
        if (ctrl->version > 0x01050001) {
                /* Only for versions >= 1.5.1 */