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Re: [PATCH v9 2/3] fpga manager: Add cyclone-ps-spi driver for Altera FPGAs

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From Alan Tull <delicious.quinoa@gmail.com>
Newsgroups linux.kernel
Subject Re: [PATCH v9 2/3] fpga manager: Add cyclone-ps-spi driver for Altera FPGAs
Date Wed, 15 Feb 2017 18:20:07 +0100
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X-Original-Cc Joshua Clayton <stillcompiling@gmail.com>, Alan Tull <atull@opensource.altera.com>, Moritz Fischer <moritz.fischer@ettus.com>, Russell King <linux@armlinux.org.uk>, Shawn Guo <shawnguo@kernel.org>, Sascha Hauer <kernel@pengutronix.de>, Fabio Estevam <fabio.estevam@nxp.com>, Mark Rutland <mark.rutland@arm.com>, Rob Herring <robh+dt@kernel.org>, "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>, linux-kernel <linux-kernel@vger.kernel.org>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>, linux-fpga@vger.kernel.org
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On Wed, Feb 15, 2017 at 9:26 AM, Anatolij Gustschin <agust@denx.de> wrote:
> Hi Joshua,
>
> On Tue, 24 Jan 2017 14:19:33 -0800
> Joshua Clayton stillcompiling@gmail.com wrote:
> ...
>>+static int cyclonespi_write(struct fpga_manager *mgr, const char *buf,
>>+                          size_t count)
>>+{
>>+      struct cyclonespi_conf *conf = (struct cyclonespi_conf *)mgr->priv;
>>+      const char *fw_data = buf;
>>+      const char *fw_data_end = fw_data + count;
>>+
>>+      while (fw_data < fw_data_end) {
>>+              int ret;
>>+              size_t stride = min(fw_data_end - fw_data, SZ_4K);
>>+
>>+              rev_buf(fw_data, stride);
>
> Can we make rev_buf() optional here? I've tested this driver with
> Stratix-V FPGA using orion_spi driver. It works without swapping
> the data.

I replied earlier, but something in my email settings bounced.

The way to make it optional is to add a bit to the flags of the
fpga_image_info struct.

Alan

>
> Thanks,
> Anatolij

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Thread

Re: [PATCH v9 2/3] fpga manager: Add cyclone-ps-spi driver for  Altera FPGAs Anatolij Gustschin <agust@denx.de> - 2017-02-15 16:30 +0100
  Re: [PATCH v9 2/3] fpga manager: Add cyclone-ps-spi driver for Altera FPGAs Alan Tull <delicious.quinoa@gmail.com> - 2017-02-15 18:20 +0100
    Re: [PATCH v9 2/3] fpga manager: Add cyclone-ps-spi driver for Altera  FPGAs Joshua Clayton <stillcompiling@gmail.com> - 2017-02-16 00:10 +0100

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