linux-kernel - [PATCH v5 6/8] remoteproc: qcom: Introduce reset assert/deassert helper functions

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Date:   Mon, 21 May 2018 22:57:12 +0530
From:   Sibi Sankar <sibis@...eaurora.org>
To:     bjorn.andersson@...aro.org, p.zabel@...gutronix.de,
        robh+dt@...nel.org
Cc:     linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, sibis@...eaurora.org,
        georgi.djakov@...aro.org, jassisinghbrar@...il.com,
        ohad@...ery.com, mark.rutland@....com, kyan@...eaurora.org,
        sricharan@...eaurora.org, akdwived@...eaurora.org,
        linux-arm-msm@...r.kernel.org, tsoni@...eaurora.org
Subject: [PATCH v5 6/8] remoteproc: qcom: Introduce reset assert/deassert helper functions

Adding reset assert/deassert helper functions to handle SoC
specific reset sequences. This wil be used by SDM845 to assert and
deassert ALT_RESET and MSS_RESET signals.

Signed-off-by: Sibi Sankar <sibis@...eaurora.org>
---
 drivers/remoteproc/qcom_q6v5_pil.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/remoteproc/qcom_q6v5_pil.c b/drivers/remoteproc/qcom_q6v5_pil.c
index a5fa6521bb83..552805bc07c1 100644
--- a/drivers/remoteproc/qcom_q6v5_pil.c
+++ b/drivers/remoteproc/qcom_q6v5_pil.c
@@ -352,6 +352,16 @@ static int q6v5_load(struct rproc *rproc, const struct firmware *fw)
 	return 0;
 }
 
+static int q6v5_reset_assert(struct q6v5 *qproc)
+{
+	return reset_control_assert(qproc->mss_restart);
+}
+
+static int q6v5_reset_deassert(struct q6v5 *qproc)
+{
+	return reset_control_deassert(qproc->mss_restart);
+}
+
 static int q6v5_rmb_pbl_wait(struct q6v5 *qproc, int ms)
 {
 	unsigned long timeout;
@@ -767,7 +777,7 @@ static int q6v5_start(struct rproc *rproc)
 		dev_err(qproc->dev, "failed to enable supplies\n");
 		goto disable_proxy_clk;
 	}
-	ret = reset_control_deassert(qproc->mss_restart);
+	ret = q6v5_reset_deassert(qproc);
 	if (ret) {
 		dev_err(qproc->dev, "failed to deassert mss restart\n");
 		goto disable_vdd;
@@ -859,7 +869,7 @@ static int q6v5_start(struct rproc *rproc)
 			 qproc->active_clk_count);
 
 assert_reset:
-	reset_control_assert(qproc->mss_restart);
+	q6v5_reset_assert(qproc);
 disable_vdd:
 	q6v5_regulator_disable(qproc, qproc->active_regs,
 			       qproc->active_reg_count);
@@ -909,7 +919,7 @@ static int q6v5_stop(struct rproc *rproc)
 				      qproc->mpss_phys, qproc->mpss_size);
 	WARN_ON(ret);
 
-	reset_control_assert(qproc->mss_restart);
+	q6v5_reset_assert(qproc);
 	q6v5_disable_irqs(qproc);
 
 	if (!qproc->unvoted_flag) {
-- 
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