Quoting Srinivasa Rao Mandadapu (2022-06-08 07:02:09)
Validate software clock gating required or not and do softwareThis talks about software clock gating but the code is getting a reset
clock gating on hclk if soundwire is operational and keep it
running by adding flag in private dat structure.
This is to avoid conflict between older architectures,
where software clock gating is not required and on latest
architectues, where software clock gating is mandatory.
and asserting it. Is that because the power on reset value of the clock
gating is to have hardware clock gating disabled, but some earlier code
is enabling hardware clock gating?
Okay. revert this NULL check here.
Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@xxxxxxxxxxx>reset_control_reset() is a no-op if the pointer is NULL so the if
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
---
drivers/soundwire/qcom.c | 27 ++++++++++++++++++++-------
1 file changed, 20 insertions(+), 7 deletions(-)
diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
index 38c3bf5..ebd7479 100644
--- a/drivers/soundwire/qcom.c
+++ b/drivers/soundwire/qcom.c
@@ -659,7 +665,8 @@ static int qcom_swrm_init(struct qcom_swrm_ctrl *ctrl)
val = FIELD_PREP(SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK, ctrl->rows_index);
val |= FIELD_PREP(SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK, ctrl->cols_index);
- reset_control_reset(ctrl->audio_cgcr);
+ if (ctrl->audio_cgcr)
+ reset_control_reset(ctrl->audio_cgcr);
ctrl->reg_write(ctrl, SWRM_MCP_FRAME_CTRL_BANK_ADDR(0), val);
@@ -1494,7 +1506,8 @@ static int __maybe_unused swrm_runtime_resume(struct device *dev)
qcom_swrm_get_device_status(ctrl);
sdw_handle_slave_status(&ctrl->bus, ctrl->status);
} else {
- reset_control_reset(ctrl->audio_cgcr);
+ if (ctrl->audio_cgcr)
+ reset_control_reset(ctrl->audio_cgcr);
condition is not necessary in the above two statements.