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From: Bhupesh Sharma <bhupesh.sharma@linaro.org>
To: linux-arm-msm@vger.kernel.org
Cc: bhupesh.sharma@linaro.org,
	Thara Gopinath <thara.gopinath@linaro.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Rob Herring <robh+dt@kernel.org>, Andy Gross <agross@kernel.org>,
	Herbert Xu <herbert@gondor.apana.org.au>,
	"David S . Miller" <davem@davemloft.net>,
	Stephen Boyd <sboyd@kernel.org>,
	Michael Turquette <mturquette@baylibre.com>,
	Vinod Koul <vkoul@kernel.org>,
	dmaengine@vger.kernel.org, linux-clk@vger.kernel.org,
	linux-crypto@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, bhupesh.linux@gmail.com
Subject: [PATCH v2 16/17] crypto: qce: Defer probe in case interconnect is not yet initialized
Date: Thu,  6 May 2021 03:07:30 +0530	[thread overview]
Message-ID: <20210505213731.538612-17-bhupesh.sharma@linaro.org> (raw)
In-Reply-To: <20210505213731.538612-1-bhupesh.sharma@linaro.org>

On some Qualcomm parts the qce crypto driver needs the interconnect between
the crypto block and main memory to be initialized first before the crypto
registers can be accessed. So it makes sense to defer the qce crypto driver
probing in case the interconnect driver is not yet probed.

This fixes the qce probe failure issues when both qce and
interconnect drivers are compiled as static part of the kernel.

Cc: Thara Gopinath <thara.gopinath@linaro.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Andy Gross <agross@kernel.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: David S. Miller <davem@davemloft.net>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Vinod Koul <vkoul@kernel.org>
Cc: dmaengine@vger.kernel.org
Cc: linux-clk@vger.kernel.org
Cc: linux-crypto@vger.kernel.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: bhupesh.linux@gmail.com
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
---
 drivers/crypto/qce/core.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/crypto/qce/core.c b/drivers/crypto/qce/core.c
index 3e742e9911fa..9915b184f780 100644
--- a/drivers/crypto/qce/core.c
+++ b/drivers/crypto/qce/core.c
@@ -222,6 +222,20 @@ static int qce_crypto_probe(struct platform_device *pdev)
 		return ret;
 
 	qce->mem_path = of_icc_get(qce->dev, "memory");
+
+	/* Check for NULL return path, which indicates
+	 * interconnect API is disabled or the "interconnects"
+	 * DT property is missing.
+	 */
+	if (!qce->mem_path)
+		/* On some qcom parts, the qce crypto block needs interconnect
+		 * paths to be configured before the registers can be accessed.
+		 * Check here for the same.
+		 */
+		if (!strcmp(of_id->compatible, "qcom,ipq6018-qce") ||
+		    !strcmp(of_id->compatible, "qcom,sdm845-qce"))
+			return -EPROBE_DEFER;
+
 	if (IS_ERR(qce->mem_path))
 		return PTR_ERR(qce->mem_path);
 
-- 
2.30.2


  parent reply	other threads:[~2021-05-05 21:40 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-05 21:37 [PATCH v2 00/17] Enable Qualcomm Crypto Engine on sm8250 Bhupesh Sharma
2021-05-05 21:37 ` [PATCH v2 01/17] dt-bindings: qcom-bam: Add 'interconnects' & 'interconnect-names' to optional properties Bhupesh Sharma
2021-05-05 21:37 ` [PATCH v2 02/17] dt-bindings: qcom-bam: Add 'iommus' to required properties Bhupesh Sharma
2021-05-05 21:37 ` [PATCH v2 03/17] dt-bindings: qcom-qce: " Bhupesh Sharma
2021-05-05 21:37 ` [PATCH v2 04/17] dt-bindings: qcom-qce: Add 'interconnects' and move 'clocks' to optional properties Bhupesh Sharma
2021-05-05 21:37 ` [PATCH v2 05/17] arm64/dts: qcom: sdm845: Use RPMH_CE_CLK macro directly Bhupesh Sharma
2021-05-05 21:37 ` [PATCH v2 06/17] dt-bindings: crypto : Add new compatible strings for qcom-qce Bhupesh Sharma
2021-05-05 21:37 ` [PATCH v2 07/17] arm64/dts: qcom: Use new compatibles for crypto nodes Bhupesh Sharma
2021-05-05 21:37 ` [PATCH v2 08/17] dma: qcom: bam_dma: Add support to initialize interconnect path Bhupesh Sharma
2021-05-05 21:37 ` [PATCH v2 09/17] crypto: qce: core: " Bhupesh Sharma
2021-05-18 15:07   ` Bjorn Andersson
2021-05-18 15:38     ` Thara Gopinath
2021-05-18 15:39     ` Bhupesh Sharma
2021-05-05 21:37 ` [PATCH v2 10/17] crypto: qce: Add new compatibles for qce crypto driver Bhupesh Sharma
2021-05-05 21:37 ` [PATCH v2 11/17] crypto: qce: core: Make clocks optional Bhupesh Sharma
2021-05-05 21:37 ` [PATCH v2 12/17] crypto: qce: Print a failure msg in case probe() fails Bhupesh Sharma
2021-05-05 21:37 ` [PATCH v2 13/17] crypto: qce: Convert the device found dev_dbg() to dev_info() Bhupesh Sharma
2021-05-05 21:37 ` [PATCH v2 14/17] dma: qcom: bam_dma: Create a new header file for BAM DMA driver Bhupesh Sharma
2021-05-09 13:58   ` Vinod Koul
2021-05-09 19:20     ` Bhupesh Sharma
2021-05-05 21:37 ` [PATCH v2 15/17] crypto: qce: Defer probing if BAM dma is not yet initialized Bhupesh Sharma
2021-05-06  4:52   ` kernel test robot
2021-05-07 21:16     ` Bhupesh Sharma
2021-05-10 13:22   ` Thara Gopinath
2021-05-18 14:44     ` Bhupesh Sharma
2021-05-05 21:37 ` Bhupesh Sharma [this message]
2021-05-10 13:23   ` [PATCH v2 16/17] crypto: qce: Defer probe in case interconnect " Thara Gopinath
2021-05-18 14:39     ` Bhupesh Sharma
2021-05-10 13:58   ` Rafael Reinoldes
2021-05-05 21:37 ` [PATCH v2 17/17] arm64/dts: qcom: sm8250: Add dt entries to support crypto engine Bhupesh Sharma
2021-05-05 22:09 ` [PATCH v2 00/17] Enable Qualcomm Crypto Engine on sm8250 Eric Biggers
2021-05-07 21:12   ` Bhupesh Sharma
2021-05-07 21:14 ` Rob Herring
2021-05-08 18:56   ` Bhupesh Sharma

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