From: Bhupesh Sharma <bhupesh.sharma@linaro.org>
To: linux-pm@vger.kernel.org
Cc: bhupesh.sharma@linaro.org, bhupesh.linux@gmail.com,
linux-kernel@vger.kernel.org, bjorn.andersson@linaro.org,
konrad.dybcio@somainline.org, linux-arm-msm@vger.kernel.org,
daniel.lezcano@linaro.org, robh+dt@kernel.org, rafael@kernel.org,
Amit Kucheria <amitk@kernel.org>,
Thara Gopinath <thara.gopinath@gmail.com>
Subject: [PATCH v3 1/4] firmware: qcom: scm: Add support for tsens reinit workaround
Date: Thu, 4 Aug 2022 11:16:35 +0530 [thread overview]
Message-ID: <20220804054638.3197294-2-bhupesh.sharma@linaro.org> (raw)
In-Reply-To: <20220804054638.3197294-1-bhupesh.sharma@linaro.org>
Some versions of Qualcomm tsens controller might enter a
'bad state' while running stability tests causing sensor
temperatures/interrupts status to be in an 'invalid' state.
It is recommended to re-initialize the tsens controller
via trustzone (secure registers) using scm call(s) when that
happens.
Add support for the same in the qcom_scm driver.
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Amit Kucheria <amitk@kernel.org>
Cc: Thara Gopinath <thara.gopinath@gmail.com>
Cc: linux-pm@vger.kernel.org
Cc: linux-arm-msm@vger.kernel.org
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
---
drivers/firmware/qcom_scm.c | 15 +++++++++++++++
drivers/firmware/qcom_scm.h | 4 ++++
include/linux/qcom_scm.h | 2 ++
3 files changed, 21 insertions(+)
diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
index cdbfe54c8146..93adcc046a62 100644
--- a/drivers/firmware/qcom_scm.c
+++ b/drivers/firmware/qcom_scm.c
@@ -858,6 +858,21 @@ int qcom_scm_mem_protect_video_var(u32 cp_start, u32 cp_size,
}
EXPORT_SYMBOL(qcom_scm_mem_protect_video_var);
+int qcom_scm_tsens_reinit(void)
+{
+ int ret;
+ const struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_TSENS,
+ .cmd = QCOM_SCM_TSENS_INIT_ID,
+ };
+ struct qcom_scm_res res;
+
+ ret = qcom_scm_call(__scm->dev, &desc, &res);
+
+ return ret ? : res.result[0];
+}
+EXPORT_SYMBOL(qcom_scm_tsens_reinit);
+
static int __qcom_scm_assign_mem(struct device *dev, phys_addr_t mem_region,
size_t mem_sz, phys_addr_t src, size_t src_sz,
phys_addr_t dest, size_t dest_sz)
diff --git a/drivers/firmware/qcom_scm.h b/drivers/firmware/qcom_scm.h
index 0d51eef2472f..495fa00230c7 100644
--- a/drivers/firmware/qcom_scm.h
+++ b/drivers/firmware/qcom_scm.h
@@ -94,6 +94,10 @@ extern int scm_legacy_call(struct device *dev, const struct qcom_scm_desc *desc,
#define QCOM_SCM_PIL_PAS_IS_SUPPORTED 0x07
#define QCOM_SCM_PIL_PAS_MSS_RESET 0x0a
+/* TSENS Services and Function IDs */
+#define QCOM_SCM_SVC_TSENS 0x1E
+#define QCOM_SCM_TSENS_INIT_ID 0x5
+
#define QCOM_SCM_SVC_IO 0x05
#define QCOM_SCM_IO_READ 0x01
#define QCOM_SCM_IO_WRITE 0x02
diff --git a/include/linux/qcom_scm.h b/include/linux/qcom_scm.h
index f8335644a01a..5c37e1658cef 100644
--- a/include/linux/qcom_scm.h
+++ b/include/linux/qcom_scm.h
@@ -124,4 +124,6 @@ extern int qcom_scm_lmh_dcvsh(u32 payload_fn, u32 payload_reg, u32 payload_val,
extern int qcom_scm_lmh_profile_change(u32 profile_id);
extern bool qcom_scm_lmh_dcvsh_available(void);
+extern int qcom_scm_tsens_reinit(void);
+
#endif
--
2.35.3
next prev parent reply other threads:[~2022-08-04 5:47 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-04 5:46 [PATCH v3 0/4] Add support for tsens controller reinit via trustzone Bhupesh Sharma
2022-08-04 5:46 ` Bhupesh Sharma [this message]
2022-08-29 22:15 ` [PATCH v3 1/4] firmware: qcom: scm: Add support for tsens reinit workaround Bjorn Andersson
2022-08-30 17:03 ` Bhupesh Sharma
2022-08-04 5:46 ` [PATCH v3 2/4] thermal: qcom: tsens: Add hooks for supplying platform specific reinit quirks Bhupesh Sharma
2022-08-04 5:46 ` [PATCH v3 3/4] thermal: qcom: tsens: Add driver support for re-initialization quirk Bhupesh Sharma
2022-08-29 22:14 ` Bjorn Andersson
2022-08-30 17:14 ` Bhupesh Sharma
2022-08-04 5:46 ` [PATCH v3 4/4] thermal: qcom: tsens: Add reinit quirk support for tsens v2 controllers Bhupesh Sharma
2022-08-29 22:14 ` Bjorn Andersson
2022-08-25 5:00 ` [PATCH v3 0/4] Add support for tsens controller reinit via trustzone Bhupesh Sharma
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