Merge "dt-bindings: arm: coresight: Add qcom,hw-enable-check for tpdm" (7839efbd) · Commits · e / devices / android_kernel_fairphone_FP4

Documentation/devicetree/bindings/arm/coresight.txt

+3 −0

Original line number	Diff line number	Diff line
		@@ -169,6 +169,9 @@ its hardware characteristcs.

		* qcom,tpdm-regs: List of regulators required.

		* qcom,hw-enable-check: Check if the tpdm need to be probed as some tpdms
		are not enabled in secure device.

		* Optional properties for CSRs:

		* qcom,usb-bam-support: boolean, indicates CSR has the ability to operate on

+13 −0

Original line number	Diff line number	Diff line
		@@ -14,6 +14,7 @@
		#include <linux/of.h>
		#include <linux/coresight.h>
		#include <linux/regulator/consumer.h>
		#include <soc/qcom/scm.h>

		#include "coresight-priv.h"

		@@ -131,6 +132,8 @@ do { \
		#define TPDM_REVISION_A 0
		#define TPDM_REVISION_B 1

		#define HW_ENABLE_CHECK_VALUE 0x10

		enum tpdm_dataset {
		TPDM_DS_IMPLDEF,
		TPDM_DS_DSB,
		@@ -4368,12 +4371,22 @@ static int tpdm_probe(struct amba_device adev, const struct amba_id id)
		struct coresight_desc *desc;
		static int traceid = TPDM_TRACE_ID_START;
		uint32_t version;
		struct scm_desc des = {0};
		u32 scm_ret = 0;

		pdata = of_get_coresight_platform_data(dev, adev->dev.of_node);
		if (IS_ERR(pdata))
		return PTR_ERR(pdata);
		adev->dev.platform_data = pdata;

		if (of_property_read_bool(adev->dev.of_node, "qcom,hw-enable-check")) {
		ret = scm_call2(SCM_SIP_FNID(SCM_SVC_UTIL,
		HW_ENABLE_CHECK_VALUE), &des);
		scm_ret = des.ret[0];
		if (scm_ret == 0)
		return -ENXIO;
		}

		drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
		if (!drvdata)
		return -ENOMEM;