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From:   Pratyush Yadav <p.yadav@ti.com>
To:     Nishanth Menon <nm@ti.com>, Tero Kristo <kristo@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Tudor Ambarus <tudor.ambarus@microchip.com>,
        Michael Walle <michael@walle.cc>,
        Miquel Raynal <miquel.raynal@bootlin.com>,
        Richard Weinberger <richard@nod.at>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        Mark Brown <broonie@kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <linux-mtd@lists.infradead.org>, <linux-spi@vger.kernel.org>
CC:     Pratyush Yadav <p.yadav@ti.com>, Lokesh Vutla <lokeshvutla@ti.com>
Subject: [RFC PATCH 3/6] mtd: spi-nor: core: run calibration when initialization is done
Date:   Fri, 12 Mar 2021 00:42:13 +0530
Message-ID: <20210311191216.7363-4-p.yadav@ti.com>
In-Reply-To: <20210311191216.7363-1-p.yadav@ti.com>
References: <20210311191216.7363-1-p.yadav@ti.com>
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Once the flash is initialized tell the controller it can run
calibration procedures if needed. This can be useful when calibration is
needed to run at higher clock speeds.

Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
---
 drivers/mtd/spi-nor/core.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 88888df009f0..e0cbcaf1be89 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -3650,6 +3650,7 @@ static int spi_nor_probe(struct spi_mem *spimem)
 	 * checking what's really supported using spi_mem_supports_op().
 	 */
 	const struct spi_nor_hwcaps hwcaps = { .mask = SNOR_HWCAPS_ALL };
+	struct spi_mem_op op;
 	char *flash_name;
 	int ret;
 
@@ -3709,8 +3710,15 @@ static int spi_nor_probe(struct spi_mem *spimem)
 	if (ret)
 		return ret;
 
-	return mtd_device_register(&nor->mtd, data ? data->parts : NULL,
-				   data ? data->nr_parts : 0);
+	ret = mtd_device_register(&nor->mtd, data ? data->parts : NULL,
+				  data ? data->nr_parts : 0);
+	if (ret)
+		return ret;
+
+	op = spi_nor_spimem_get_read_op(nor);
+	spi_mem_do_calibration(nor->spimem, &op);
+
+	return 0;
 }
 
 static int spi_nor_remove(struct spi_mem *spimem)
-- 
2.30.0