diff mbox series

ASoC: qcom: soundwire: Add support for controlling audio CGCR from HLOS

Message ID 1646035750-25635-1-git-send-email-quic_srivasam@quicinc.com
State Accepted
Commit 32882881078bd8f8fae47ff69c102d9e691f5bb9
Headers show
Series ASoC: qcom: soundwire: Add support for controlling audio CGCR from HLOS | expand

Commit Message

Srinivasa Rao Mandadapu Feb. 28, 2022, 8:09 a.m. UTC 
Add support for controlling soundwire audio CGCR interface using clock framework
to make hclk ungating with software.
As per new hardware changes, software has to always ungate hclk if soundwire
is operational and keep it running.
This requirement is for latest LPASS chipsets for RX, TX and WSA path to work.

Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
Co-developed-by: Venkata Prasad Potturu <quic_potturu@quicinc.com>
Signed-off-by: Venkata Prasad Potturu <quic_potturu@quicinc.com>
---
This patch set depends on:
	-- Clock driver patches with reset control support, yet to be posted.

 drivers/soundwire/qcom.c | 7 +++++++
 1 file changed, 7 insertions(+)
diff mbox series

Patch

diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
index fb183bd..440aad8 100644
--- a/drivers/soundwire/qcom.c
+++ b/drivers/soundwire/qcom.c
@@ -12,6 +12,7 @@ 
 #include <linux/of_irq.h>
 #include <linux/of_device.h>
 #include <linux/regmap.h>
+#include <linux/reset.h>
 #include <linux/slab.h>
 #include <linux/slimbus.h>
 #include <linux/soundwire/sdw.h>
@@ -129,6 +130,7 @@  struct qcom_swrm_ctrl {
 	struct device *dev;
 	struct regmap *regmap;
 	void __iomem *mmio;
+	struct reset_control *audio_cgcr;
 #ifdef CONFIG_DEBUG_FS
 	struct dentry *debugfs;
 #endif
@@ -618,6 +620,8 @@  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);
+
 	ctrl->reg_write(ctrl, SWRM_MCP_FRAME_CTRL_BANK_ADDR(0), val);
 
 	/* Enable Auto enumeration */
@@ -1269,6 +1273,9 @@  static int qcom_swrm_probe(struct platform_device *pdev)
 	ctrl->bus.ops = &qcom_swrm_ops;
 	ctrl->bus.port_ops = &qcom_swrm_port_ops;
 	ctrl->bus.compute_params = &qcom_swrm_compute_params;
+	ctrl->audio_cgcr = devm_reset_control_get_exclusive(dev, "swr_audio_cgcr");
+	if (IS_ERR(ctrl->audio_cgcr))
+		dev_err(dev, "Failed to get audio_cgcr reset required for soundwire-v1.6.0\n");
 
 	ret = qcom_swrm_get_port_config(ctrl);
 	if (ret)