Commit abd9a604 authored by Srinivas Kandagatla's avatar Srinivas Kandagatla Committed by Vinod Koul
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soundwire: qcom: add debugfs entry for soundwire register dump 



For debug purposes add an entry in debugfs to dump Qualcomm
SoundWire Controller registers.

Signed-off-by: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210907105636.3171-1-srinivas.kandagatla@linaro.org


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 4cbbe74d

drivers/soundwire/qcom.c

+27 −0
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ 
#include <linux/io.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/debugfs.h>

#include <linux/of.h>

#include <linux/of_irq.h>

#include <linux/of_device.h>
@@ -83,6 +84,7 @@ 
#define SWRM_DP_PORT_HCTRL_BANK(n, m)	(0x1134 + 0x100 * (n - 1) + 0x40 * m)

#define SWRM_DP_BLOCK_CTRL3_BANK(n, m)	(0x1138 + 0x100 * (n - 1) + 0x40 * m)

#define SWRM_DIN_DPn_PCM_PORT_CTRL(n)	(0x1054 + 0x100 * (n - 1))

#define SWR_MSTR_MAX_REG_ADDR		(0x1740)



#define SWRM_DP_PORT_CTRL_EN_CHAN_SHFT				0x18

#define SWRM_DP_PORT_CTRL_OFFSET2_SHFT				0x10
@@ -127,6 +129,9 @@ struct qcom_swrm_ctrl { 
	struct device *dev;

	struct regmap *regmap;

	void __iomem *mmio;

#ifdef CONFIG_DEBUG_FS

	struct dentry *debugfs;

#endif

	struct completion broadcast;

	struct completion enumeration;

	struct work_struct slave_work;
@@ -1192,6 +1197,22 @@ static int qcom_swrm_get_port_config(struct qcom_swrm_ctrl *ctrl) 
	return 0;

}



#ifdef CONFIG_DEBUG_FS

static int swrm_reg_show(struct seq_file *s_file, void *data)

{

	struct qcom_swrm_ctrl *swrm = s_file->private;

	int reg, reg_val;



	for (reg = 0; reg <= SWR_MSTR_MAX_REG_ADDR; reg += 4) {

		swrm->reg_read(swrm, reg, &reg_val);

		seq_printf(s_file, "0x%.3x: 0x%.2x\n", reg, reg_val);

	}



	return 0;

}

DEFINE_SHOW_ATTRIBUTE(swrm_reg);

#endif



static int qcom_swrm_probe(struct platform_device *pdev)

{

	struct device *dev = &pdev->dev;
@@ -1302,6 +1323,12 @@ static int qcom_swrm_probe(struct platform_device *pdev) 
		 (ctrl->version >> 24) & 0xff, (ctrl->version >> 16) & 0xff,

		 ctrl->version & 0xffff);



#ifdef CONFIG_DEBUG_FS

	ctrl->debugfs = debugfs_create_dir("qualcomm-sdw", ctrl->bus.debugfs);

	debugfs_create_file("qualcomm-registers", 0400, ctrl->debugfs, ctrl,

			    &swrm_reg_fops);

#endif



	return 0;



err_master_add: