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[75.142.250.213]) by smtp.gmail.com with ESMTPSA id f12sm1102779qke.37.2021.07.14.07.22.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 14 Jul 2021 07:22:24 -0700 (PDT) Subject: Re: [PATCH v4 2/4] spi: spi-altera-dfl: support n5010 feature revision To: =?UTF-8?Q?Martin_Hundeb=c3=b8ll?= , =?UTF-8?Q?Martin_Hundeb=c3=b8ll?= , Wu Hao , Moritz Fischer , Xu Yilun , Jean Delvare , Guenter Roeck , Lee Jones , Mark Brown Cc: linux-fpga@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-spi@vger.kernel.org References: <20210705101645.2040106-1-martin@geanix.com> <20210705101645.2040106-3-martin@geanix.com> From: Tom Rix Message-ID: <99abfd17-4307-0b88-32a3-c80f61da587b@redhat.com> Date: Wed, 14 Jul 2021 07:22:21 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 7/14/21 4:33 AM, Martin Hundebøll wrote: > > > On 06/07/2021 16.56, Tom Rix wrote: >>> diff --git a/drivers/spi/spi-altera-dfl.c >>> b/drivers/spi/spi-altera-dfl.c >>> index 3e32e4fe5895..f6cf7c8d9dac 100644 >>> --- a/drivers/spi/spi-altera-dfl.c >>> +++ b/drivers/spi/spi-altera-dfl.c >>> @@ -111,6 +111,13 @@ static struct spi_board_info m10_bmc_info = { >>>       .chip_select = 0, >>>   }; >>> +static struct spi_board_info m10_n5010_bmc_info = { >>> +    .modalias = "m10-n5010", >>> +    .max_speed_hz = 12500000, >>> +    .bus_num = 0, >>> +    .chip_select = 0, >>> +}; >> >> Other then the modalias, this is exactly the same as m10_bmc_info. >> >> Why not set platform_data? > > So like this? > > +static struct spi_board_info m10_n5010_bmc_info = { > +    .platform_data = "m10-n5010", > +    .max_speed_hz = 12500000, > +    .bus_num = 0, > +    .chip_select = 0, > +}; > > I don't see how that should improve the situation, but we might allocate > the board info on the stack and set modalias dynamically instead? No, I mean that instead of have two *bmc_info's generalize the existing one. This could be done by using the as yet unused platform_data field to hold the identity as a bit/enum in an int. Tom > > // Martin >