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X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Oct 2016 19:55:32.5782 (UTC) X-MS-Exchange-CrossTenant-Id: fbd72e03-d4a5-4110-adce-614d51f2077a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=fbd72e03-d4a5-4110-adce-614d51f2077a;Ip=[66.35.236.236];Helo=[sj-itexedge04.altera.priv.altera.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BLUPR03MB485 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1896 Lines: 51 On 10/07/2016 02:33 PM, Geert Uytterhoeven wrote: > On Fri, Oct 7, 2016 at 4:56 PM, wrote: >> From: Thor Thayer >> >> Some SPI masters require the slave to be selected before a >> transaction can occur - even in the case of GPIO chip select. >> >> This patch adds a GPIO slave select parameter to indicate >> the slave needs to be selected in the GPIO CS case. >> >> Signed-off-by: Thor Thayer >> --- >> v2 Add to SPI framework - add bindings. >> --- >> Documentation/devicetree/bindings/spi/spi-bus.txt | 1 + >> 1 file changed, 1 insertion(+) >> >> diff --git a/Documentation/devicetree/bindings/spi/spi-bus.txt b/Documentation/devicetree/bindings/spi/spi-bus.txt >> index 4b1d6e7..3a006bc 100644 >> --- a/Documentation/devicetree/bindings/spi/spi-bus.txt >> +++ b/Documentation/devicetree/bindings/spi/spi-bus.txt >> @@ -24,6 +24,7 @@ support describing the chip select layout. >> Optional properties: >> - cs-gpios - gpios chip select. >> - num-cs - total number of chipselects. >> +- gpio-ss - use internal slave select with gpio chip select. >> >> If cs-gpios is used the number of chip selects will be increased automatically >> with max(cs-gpios > hw cs). > > To me, this looks more like a new flag the SPI controller driver should > set in spi_master.flags, instead of a DT property. > Yes, I see your point since this is SPI master specific. I'll respin as you suggest. Thanks for reviewing! > Gr{oetje,eeting}s, > > Geert > > -- > Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org > > In personal conversations with technical people, I call myself a hacker. But > when I'm talking to journalists I just say "programmer" or something like that. > -- Linus Torvalds >