linux-kernel - [PATCH v3 3/3] mmc: sdhci-msm: drop redundant of_device

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Message-Id: <20220714091042.22287-4-krzysztof.kozlowski@linaro.org>
Date:   Thu, 14 Jul 2022 11:10:42 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Bhupesh Sharma <bhupesh.sharma@...aro.org>,
        linux-mmc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Douglas Anderson <dianders@...omium.org>
Subject: [PATCH v3 3/3] mmc: sdhci-msm: drop redundant of_device_id entries

This reverts three commits:
1. Revert "mmc: sdhci-msm: Add compatible string check for sdx65"
   This reverts commit 953706844f0f2fd4dc6984cc010fe6cf51c041f2.

2. Revert "mmc: sdhci-msm: Add compatible string check for sm8150"
   This reverts commit 5acd6adb65802cc6f9986be3750179a820580d37.

3. Revert "mmc: sdhci-msm: Add SoC specific compatibles"
   This reverts commit 466614a9765c6fb67e1464d0a3f1261db903834b.

The oldest commit 466614a9765c ("mmc: sdhci-msm: Add SoC specific
compatibles") did not specify what benefits such multiple compatibles
bring, therefore assume there is none.  On the other hand such approach
brings a lot of churn to driver maintenance by expecting commit for
every new compatible, even though it is already covered by the fallback.

There is really no sense in duplicating of_device_id for each
variant, which is already covered by generic compatible fallback
qcom,sdhci-msm-v4 or qcom,sdhci-msm-v5.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Reviewed-by: Douglas Anderson <dianders@...omium.org>

---

Cc: Konrad Dybcio <konrad.dybcio@...ainline.org>
Cc: Bhupesh Sharma <bhupesh.sharma@...aro.org>
Cc: Doug Anderson <dianders@...omium.org>
---
 drivers/mmc/host/sdhci-msm.c | 29 ++++-------------------------
 1 file changed, 4 insertions(+), 25 deletions(-)

diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index e395411fb6fd..dc2991422a87 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -2435,33 +2435,12 @@ static const struct sdhci_msm_variant_info sdm845_sdhci_var = {
 };
 
 static const struct of_device_id sdhci_msm_dt_match[] = {
-	 /* Following two entries are deprecated (kept only for backward compatibility) */
-	{.compatible = "qcom,sdhci-msm-v4", .data = &sdhci_msm_mci_var},
-	{.compatible = "qcom,sdhci-msm-v5", .data = &sdhci_msm_v5_var},
-	/* Add entries for sdcc versions less than 5.0 here */
-	{.compatible = "qcom,apq8084-sdhci", .data = &sdhci_msm_mci_var},
-	{.compatible = "qcom,msm8226-sdhci", .data = &sdhci_msm_mci_var},
-	{.compatible = "qcom,msm8916-sdhci", .data = &sdhci_msm_mci_var},
-	{.compatible = "qcom,msm8953-sdhci", .data = &sdhci_msm_mci_var},
-	{.compatible = "qcom,msm8974-sdhci", .data = &sdhci_msm_mci_var},
-	{.compatible = "qcom,msm8992-sdhci", .data = &sdhci_msm_mci_var},
-	{.compatible = "qcom,msm8994-sdhci", .data = &sdhci_msm_mci_var},
-	{.compatible = "qcom,msm8996-sdhci", .data = &sdhci_msm_mci_var},
 	/*
-	 * Add entries for sdcc version 5.0 here. For SDCC version 5.0.0,
-	 * MCI registers are removed from SDCC interface and some registers
-	 * are moved to HC.
+	 * Do not add new variants to the driver which are compatible with
+	 * generic ones, unless they need customization.
 	 */
-	{.compatible = "qcom,qcs404-sdhci", .data = &sdhci_msm_v5_var},
-	{.compatible = "qcom,sdx55-sdhci",  .data = &sdhci_msm_v5_var},
-	{.compatible = "qcom,sdx65-sdhci",  .data = &sdhci_msm_v5_var},
-	{.compatible = "qcom,sdm630-sdhci", .data = &sdhci_msm_v5_var},
-	{.compatible = "qcom,sm6125-sdhci", .data = &sdhci_msm_v5_var},
-	{.compatible = "qcom,sm6350-sdhci", .data = &sdhci_msm_v5_var},
-	{.compatible = "qcom,sm8150-sdhci", .data = &sdhci_msm_v5_var},
-	{.compatible = "qcom,sm8250-sdhci", .data = &sdhci_msm_v5_var},
-	{.compatible = "qcom,sc7280-sdhci", .data = &sdhci_msm_v5_var},
-	/* Add entries where soc specific handling is required, here */
+	{.compatible = "qcom,sdhci-msm-v4", .data = &sdhci_msm_mci_var},
+	{.compatible = "qcom,sdhci-msm-v5", .data = &sdhci_msm_v5_var},
 	{.compatible = "qcom,sdm845-sdhci", .data = &sdm845_sdhci_var},
 	{.compatible = "qcom,sc7180-sdhci", .data = &sdm845_sdhci_var},
 	{},
-- 
2.34.1