From: swarren@wwwdotorg•org (Stephen Warren)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH V3 0/4] ARM: tegra: Enable SLINK controller driver
Date: Tue, 30 Oct 2012 14:29:46 -0600 [thread overview]
Message-ID: <509038BA.30600@wwwdotorg.org> (raw)
In-Reply-To: <1351580726-17350-1-git-send-email-ldewangan@nvidia.com>
On 10/30/2012 01:05 AM, Laxman Dewangan wrote:
> This series modify the dts file to add the slink addresses,
> make AUXDATA in board dt files, enable slink4 for tegra30-cardhu and
> enable slink controller defconfig.
This series only instantiates the SPI controller, and not any SPI
devices. I tried to solve this:
> diff --git a/arch/arm/boot/dts/tegra30-cardhu.dtsi b/arch/arm/boot/dts/tegra30-cardhu.dtsi
> index 700f0a3..3689853 100644
> --- a/arch/arm/boot/dts/tegra30-cardhu.dtsi
> +++ b/arch/arm/boot/dts/tegra30-cardhu.dtsi
> @@ -278,6 +278,11 @@
> spi at 7000da00 {
> status = "okay";
> spi-max-frequency = <25000000>;
> + flash at 0 {
> + reg = <0>;
> + compatible = "atmel,at25df321a";
> + spi-max-frequency = <25000000>;
> + };
> };
>
> ahub {
However, this didn't work. Has the driver been tested? I'm seeing the
exact same problems I saw with the old driver, namely that the SPI flash
chip can't be identified; I think the ID bytes are read back as 0, and
hence drivers/mtd/devices/m25p80.c falls back to identifying the device
as mr25h256. Attempting to hexdump -C /dev/mtd0 gives me 32K of zeros,
whereas the device is 4M and full of non-zero data according to U-Boot.
Do you know what the problem is here? Can you please update the patch
series so that the SPI flash is instantiated and works correctly?
next prev parent reply other threads:[~2012-10-30 20:29 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-30 7:05 [PATCH V3 0/4] ARM: tegra: Enable SLINK controller driver Laxman Dewangan
2012-10-30 7:05 ` [PATCH V3 1/4] ARM: tegra: dts: add slink controller dt entry Laxman Dewangan
2012-10-30 7:05 ` [PATCH V3 2/4] ARM: tegra: Add OF_DEV_AUXDATA for SLINK driver in board dt Laxman Dewangan
2012-10-30 7:05 ` [PATCH V3 3/4] ARM: tegra: dts: cardhu: enable SLINK4 Laxman Dewangan
2012-10-30 7:05 ` [PATCH V3 4/4] ARM: tegra: config: enable spi driver for Tegra SLINK controller Laxman Dewangan
2012-10-30 20:29 ` Stephen Warren [this message]
2012-10-31 8:51 ` [PATCH V3 0/4] ARM: tegra: Enable SLINK controller driver Laxman Dewangan
2012-10-31 16:06 ` Stephen Warren
2012-10-31 17:33 ` Laxman Dewangan
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