From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexander Shiyan Subject: [PATCH v2 3/3] can: mcp251x: Allow tuning SPI mode and limit maximal SPI speed Date: Mon, 19 Aug 2013 15:39:21 +0400 Message-ID: <1376912361-22133-3-git-send-email-shc_work@mail.ru> References: <1376912361-22133-1-git-send-email-shc_work@mail.ru> Return-path: Received: from smtp33.i.mail.ru ([94.100.177.93]:58231 "EHLO smtp33.i.mail.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751267Ab3HSLjf (ORCPT ); Mon, 19 Aug 2013 07:39:35 -0400 In-Reply-To: <1376912361-22133-1-git-send-email-shc_work@mail.ru> Sender: linux-can-owner@vger.kernel.org List-ID: To: linux-can@vger.kernel.org Cc: Wolfgang Grandegger , Marc Kleine-Budde , linux-arm-kernel@lists.infradead.org, Eric Miao , Russell King , Haojian Zhuang , Alexander Shiyan Patch allow to use different mode settings for SPI (MODE3 for example) and limit maximal speed according to IC datasheet. Signed-off-by: Alexander Shiyan --- drivers/net/can/mcp251x.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/net/can/mcp251x.c b/drivers/net/can/mcp251x.c index a48d3df..c08edc7 100644 --- a/drivers/net/can/mcp251x.c +++ b/drivers/net/can/mcp251x.c @@ -1082,7 +1082,11 @@ static int mcp251x_can_probe(struct spi_device *spi) SET_NETDEV_DEV(net, &spi->dev); /* Configure the SPI bus */ - spi->mode = SPI_MODE_0; + spi->mode = spi->mode ? : SPI_MODE_0; + if (mcp251x_is_2510(spi)) + spi->max_speed_hz = spi->max_speed_hz ? : 5 * 1000 * 1000; + else + spi->max_speed_hz = spi->max_speed_hz ? : 10 * 1000 * 1000; spi->bits_per_word = 8; spi_setup(spi); -- 1.8.1.5