From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755671AbbCFPpZ (ORCPT ); Fri, 6 Mar 2015 10:45:25 -0500 Received: from ns.mm-sol.com ([37.157.136.199]:50125 "EHLO extserv.mm-sol.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751602AbbCFPpW (ORCPT ); Fri, 6 Mar 2015 10:45:22 -0500 From: "Ivan T. Ivanov" To: Mark Brown Cc: linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org Subject: [RFC PATCH] spi: Ensure that CS line is in non-active state after setup Date: Fri, 6 Mar 2015 17:45:15 +0200 Message-Id: <1425656716-25363-1-git-send-email-iivanov@mm-sol.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When drivers didn't provide setup() method, SPI core should ensure that CS line is driven in non-active state after spi_setup(). Signed-off-by: Ivan T. Ivanov --- drivers/spi/spi.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index c64a3e5..bfba2d9 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1895,6 +1895,8 @@ int spi_setup(struct spi_device *spi) if (spi->master->setup) status = spi->master->setup(spi); + else + spi_set_cs(spi, false); dev_dbg(&spi->dev, "setup mode %d, %s%s%s%s%u bits/w, %u Hz max --> %d\n", (int) (spi->mode & (SPI_CPOL | SPI_CPHA)), -- 1.9.1