[PATCH 5/7] ASoC: SOF: amd: add conditional check for acp_clkmux_sel register

[Vijendar Mukunda]

Few AMD platforms require ACP ACLK as clock source.
Add conditional check for clock mux selection register for
switching between internal clock and ACP ACLK.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@xxxxxxx>
---
 sound/soc/sof/amd/acp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/soc/sof/amd/acp.c b/sound/soc/sof/amd/acp.c
index 61faae74d637..eceba9b794ab 100644
--- a/sound/soc/sof/amd/acp.c
+++ b/sound/soc/sof/amd/acp.c
@@ -423,7 +423,9 @@ static int acp_reset(struct snd_sof_dev *sdev)
 	if (ret < 0)
 		dev_err(sdev->dev, "timeout in releasing reset\n");
 
-	snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->acp_clkmux_sel, ACP_CLOCK_ACLK);
+	if (desc->acp_clkmux_sel)
+		snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->acp_clkmux_sel, ACP_CLOCK_ACLK);
+
 	if (desc->ext_intr_enb)
 		snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->ext_intr_enb, 0x01);
 
-- 
2.34.1