linux-kernel - [PATCH V4 11/25] mmc: mmci: add validate

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Date:   Tue, 2 Oct 2018 14:09:13 +0200
From:   Ludovic Barre <ludovic.Barre@...com>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
CC:     Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        <benjamin.gaignard@...aro.org>, Gerald Baeza <gerald.baeza@...com>,
        Loic Pallardy <loic.pallardy@...com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-mmc@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        Ludovic Barre <ludovic.barre@...com>
Subject: [PATCH V4 11/25] mmc: mmci: add validate_data callback

From: Ludovic Barre <ludovic.barre@...com>

This patch adds validate_data callback at mmci_host_ops
to check specific constraints of variant.
Move mmci_validate_data function to regroup mmci_host_ops interfaces.

Signed-off-by: Ludovic Barre <ludovic.barre@...com>
---
 drivers/mmc/host/mmci.c | 39 +++++++++++++++++++++------------------
 drivers/mmc/host/mmci.h |  1 +
 2 files changed, 22 insertions(+), 18 deletions(-)

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 1835d77..c8fdb24 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -233,24 +233,6 @@ static int mmci_card_busy(struct mmc_host *mmc)
 	return busy;
 }
 
-/*
- * Validate mmc prerequisites
- */
-static int mmci_validate_data(struct mmci_host *host,
-			      struct mmc_data *data)
-{
-	if (!data)
-		return 0;
-
-	if (!is_power_of_2(data->blksz)) {
-		dev_err(mmc_dev(host->mmc),
-			"unsupported block size (%d bytes)\n", data->blksz);
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
 static void mmci_reg_delay(struct mmci_host *host)
 {
 	/*
@@ -384,6 +366,27 @@ void mmci_dma_release(struct mmci_host *host)
 		host->ops->dma_release(host);
 }
 
+/*
+ * Validate mmc prerequisites
+ */
+static int mmci_validate_data(struct mmci_host *host,
+			      struct mmc_data *data)
+{
+	if (!data)
+		return 0;
+
+	if (!is_power_of_2(data->blksz)) {
+		dev_err(mmc_dev(host->mmc),
+			"unsupported block size (%d bytes)\n", data->blksz);
+		return -EINVAL;
+	}
+
+	if (host->ops && host->ops->validate_data)
+		return host->ops->validate_data(host, data);
+
+	return 0;
+}
+
 int mmci_prep_data(struct mmci_host *host, struct mmc_data *data, bool next)
 {
 	int err;
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index 2c9e679..9e701d8 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -273,6 +273,7 @@ struct variant_data {
 
 /* mmci variant callbacks */
 struct mmci_host_ops {
+	int (*validate_data)(struct mmci_host *host, struct mmc_data *data);
 	int (*prep_data)(struct mmci_host *host, struct mmc_data *data,
 			 bool next);
 	void (*unprep_data)(struct mmci_host *host, struct mmc_data *data,
-- 
2.7.4