linux-kernel - [PATCH V2 2/2] mmc: sdhci-msm: Add wakeup functionality to sdio cards

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Date:   Thu, 26 May 2022 17:42:15 +0530
From:   Sarthak Garg <quic_sartgarg@...cinc.com>
To:     adrian.hunter@...el.com, ulf.hansson@...aro.org
Cc:     linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, quic_kamasali@...cinc.com,
        quic_rampraka@...cinc.com, quic_pragalla@...cinc.com,
        quic_sayalil@...cinc.com, Sarthak Garg <quic_sartgarg@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Subject: [PATCH V2 2/2] mmc: sdhci-msm: Add wakeup functionality to sdio cards

This patch initializes wakeup source if the detected card
is a sdio card and enables the wakeup capability.

Signed-off-by: Sarthak Garg <quic_sartgarg@...cinc.com>
---
 drivers/mmc/host/sdhci-msm.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index e395411fb6fd..3bfc506e5c45 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -2376,6 +2376,18 @@ static int sdhci_msm_start_signal_voltage_switch(struct mmc_host *mmc,
 	return -EAGAIN;
 }
 
+static void sdhci_msm_card_init_wakeup(struct mmc_card *card)
+{
+	int ret;
+
+	if (mmc_card_sdio(card)) {
+		ret = device_init_wakeup(&card->dev, true);
+		if (ret)
+			pr_err("%s: %s: failed to init wakeup: %d\n",
+				mmc_hostname(card->host), __func__, ret);
+	}
+}
+
 #define DRIVER_NAME "sdhci_msm"
 #define SDHCI_MSM_DUMP(f, x...) \
 	pr_err("%s: " DRIVER_NAME ": " f, mmc_hostname(host->mmc), ## x)
@@ -2794,6 +2806,8 @@ 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.card_init_wakeup = sdhci_msm_card_init_wakeup;
+
 	if (of_property_read_bool(node, "supports-cqe"))
 		ret = sdhci_msm_cqe_add_host(host, pdev);
 	else
-- 
2.17.1