linux-kernel - [PATCH RFC v3 2/2] mmc: host: sdhci-msm: Avoid reprogram keys for QCOM socs

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Message-Id: <20241006135530.17363-3-quic_spuppala@quicinc.com>
Date: Sun,  6 Oct 2024 19:25:30 +0530
From: Seshu Madhavi Puppala <quic_spuppala@...cinc.com>
To: Ulf Hansson <ulf.hansson@...aro.org>,
        Adrian Hunter <adrian.hunter@...el.com>
Cc: linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, quic_rampraka@...cinc.com,
        quic_nitirawa@...cinc.com, quic_sachgupt@...cinc.com,
        quic_bhaskarv@...cinc.com, quic_neersoni@...cinc.com,
        quic_gaurkash@...cinc.com, quic_spuppala@...cinc.com
Subject: [PATCH RFC v3 2/2] mmc: host: sdhci-msm: Avoid reprogram keys for QCOM socs

Implement Qualcomm hook to avoid reprogram of all
keys to Inline Crypto Engine on runtime suspend resume
of MMC since keys are not lost for QCOM socs.

Signed-off-by: Seshu Madhavi Puppala <quic_spuppala@...cinc.com>
Co-developed-by: Ram Prakash Gupta <quic_rampraka@...cinc.com>
Signed-off-by: Ram Prakash Gupta <quic_rampraka@...cinc.com>
---
 drivers/mmc/host/sdhci-msm.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index e113b99a3eab..427e0126459a 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -1183,6 +1183,11 @@ static void sdhci_msm_set_cdr(struct sdhci_host *host, bool enable)
 	}
 }
 
+static bool sdhci_msm_avoid_reprogram_allkeys(void)
+{
+	return true;
+}
+
 static int sdhci_msm_execute_tuning(struct mmc_host *mmc, u32 opcode)
 {
 	struct sdhci_host *host = mmc_priv(mmc);
@@ -2641,6 +2646,7 @@ static int sdhci_msm_probe(struct platform_device *pdev)
 	host->mmc_host_ops.start_signal_voltage_switch =
 		sdhci_msm_start_signal_voltage_switch;
 	host->mmc_host_ops.execute_tuning = sdhci_msm_execute_tuning;
+	host->mmc_host_ops.avoid_reprogram_allkeys = sdhci_msm_avoid_reprogram_allkeys;
 	if (of_property_read_bool(node, "supports-cqe"))
 		ret = sdhci_msm_cqe_add_host(host, pdev);
 	else
-- 
2.17.1