From: Huang Shijie <b32955@freescale.com>
To: <dwmw2@infradead.org>
Cc: <computersforpeace@gmail.com>, <marex@denx.de>,
<linux-mtd@lists.infradead.org>, <linux-doc@vger.kernel.org>,
<linux-spi@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<devicetree@vger.kernel.org>, Huang Shijie <b32955@freescale.com>
Subject: [PATCH v1 5/7] mtd: fsl-quadspi: get the dummy cycles for DDR Quad read from the DT property
Date: Wed, 23 Apr 2014 18:16:53 +0800 [thread overview]
Message-ID: <1398248215-26768-6-git-send-email-b32955@freescale.com> (raw)
In-Reply-To: <a>
Check the "spi-nor,ddr-quad-read-dummy" DT property to get the
dummy cycles for DDR quad read.
Signed-off-by: Huang Shijie <b32955@freescale.com>
---
drivers/mtd/spi-nor/fsl-quadspi.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/mtd/spi-nor/fsl-quadspi.c b/drivers/mtd/spi-nor/fsl-quadspi.c
index 8d659a2..15bdeb9 100644
--- a/drivers/mtd/spi-nor/fsl-quadspi.c
+++ b/drivers/mtd/spi-nor/fsl-quadspi.c
@@ -883,6 +883,7 @@ static int fsl_qspi_probe(struct platform_device *pdev)
for_each_available_child_of_node(dev->of_node, np) {
const struct spi_device_id *id;
char modalias[40];
+ u32 dummy = 0;
/* skip the holes */
if (!has_second_chip)
@@ -918,6 +919,12 @@ static int fsl_qspi_probe(struct platform_device *pdev)
if (ret < 0)
goto map_failed;
+ /* Set the dummy cycles for the DDR Quad Read */
+ ret = of_property_read_u32(np, "spi-nor,ddr-quad-read-dummy",
+ &dummy);
+ if (!ret && dummy > 0 && dummy < 8)
+ nor->read_dummy = dummy;
+
/* set the chip address for READID */
fsl_qspi_set_base_addr(q, nor);
--
1.7.2.rc3
next prev parent reply other threads:[~2014-04-23 10:16 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <a>
2014-04-23 10:16 ` [PATCH v1 0/7] mtd: spi-nor: Add the DDR quad read support Huang Shijie
2014-04-23 10:16 ` [PATCH v1 1/7] mtd: spi-nor: fix the wrong dummy value Huang Shijie
2014-04-23 19:41 ` Marek Vasut
[not found] ` <201404232141.27005.marex-ynQEQJNshbs@public.gmane.org>
2014-04-24 4:50 ` Huang Shijie
2014-04-24 13:45 ` Marek Vasut
2014-04-23 10:16 ` [PATCH v1 2/7] mtd: spi-nor: add DDR quad read support Huang Shijie
[not found] ` <1398248215-26768-3-git-send-email-b32955-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
2014-04-23 19:45 ` Marek Vasut
2014-04-24 4:53 ` Huang Shijie
2014-04-24 13:43 ` Marek Vasut
[not found] ` <201404241543.51752.marex-ynQEQJNshbs@public.gmane.org>
2014-04-24 14:26 ` Huang Shijie
2014-04-23 10:16 ` [PATCH v1 3/7] Documentation: mtd: add a new document for SPI NOR flash Huang Shijie
2014-04-23 10:16 ` [PATCH v1 4/7] Documentation: fsl-quadspi: update the document Huang Shijie
2014-04-23 10:16 ` Huang Shijie [this message]
2014-04-23 19:48 ` [PATCH v1 5/7] mtd: fsl-quadspi: get the dummy cycles for DDR Quad read from the DT property Marek Vasut
[not found] ` <201404232148.51034.marex-ynQEQJNshbs@public.gmane.org>
2014-04-24 4:58 ` Huang Shijie
2014-04-24 13:41 ` Marek Vasut
2014-04-24 14:27 ` Huang Shijie
2014-04-23 10:16 ` [PATCH v1 6/7] mtd: fsl-quadspi: use the information stored in spi-nor{} Huang Shijie
2014-04-23 10:16 ` [PATCH v1 7/7] mtd: fsl-quadspi: add the DDR quad read support Huang Shijie
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