From patchwork Tue Oct 27 09:57:23 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oleksij Rempel X-Patchwork-Id: 11859757 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B818514B7 for ; Tue, 27 Oct 2020 09:58:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A440622282 for ; Tue, 27 Oct 2020 09:58:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2896557AbgJ0J63 (ORCPT ); Tue, 27 Oct 2020 05:58:29 -0400 Received: from metis.ext.pengutronix.de ([85.220.165.71]:40329 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2896554AbgJ0J5b (ORCPT ); Tue, 27 Oct 2020 05:57:31 -0400 Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kXLjK-0004UL-D8; Tue, 27 Oct 2020 10:57:26 +0100 Received: from ore by dude.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1kXLjJ-0004ry-Pr; Tue, 27 Oct 2020 10:57:25 +0100 From: Oleksij Rempel To: Dmitry Torokhov , Alexandru Ardelean , Mark Brown Cc: Oleksij Rempel , kernel@pengutronix.de, linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, linux-spi@vger.kernel.org, David Jander Subject: [PATCH v2 1/2] spi: introduce SPI_MODE_X_MASK macro Date: Tue, 27 Oct 2020 10:57:23 +0100 Message-Id: <20201027095724.18654-2-o.rempel@pengutronix.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201027095724.18654-1-o.rempel@pengutronix.de> References: <20201027095724.18654-1-o.rempel@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: ore@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-spi@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Provide a macro to filter all SPI_MODE_0,1,2,3 mode in one run. The latest SPI framework will parse the devicetree in following call sequence: of_register_spi_device() -> of_spi_parse_dt() So, driver do not need to pars the devicetree and will get prepared flags in the probe. On one hand it is good far most drivers. On other hand some drivers need to filter flags provide by SPI framework and apply know to work flags. This drivers may use SPI_MODE_X_MASK to filter MODE flags and set own, known flags: spi->flags &= ~SPI_MODE_X_MASK; spi->flags |= SPI_MODE_0; Signed-off-by: Oleksij Rempel --- include/linux/spi/spi.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 99380c0825db..8097f27702f3 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -171,6 +171,7 @@ struct spi_device { #define SPI_MODE_1 (0|SPI_CPHA) #define SPI_MODE_2 (SPI_CPOL|0) #define SPI_MODE_3 (SPI_CPOL|SPI_CPHA) +#define SPI_MODE_X_MASK (SPI_CPOL|SPI_CPHA) #define SPI_CS_HIGH 0x04 /* chipselect active high? */ #define SPI_LSB_FIRST 0x08 /* per-word bits-on-wire */ #define SPI_3WIRE 0x10 /* SI/SO signals shared */ From patchwork Tue Oct 27 09:57:24 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oleksij Rempel X-Patchwork-Id: 11859759 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9DFDD14B7 for ; Tue, 27 Oct 2020 09:58:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 87C8621D24 for ; Tue, 27 Oct 2020 09:58:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2896556AbgJ0J63 (ORCPT ); Tue, 27 Oct 2020 05:58:29 -0400 Received: from metis.ext.pengutronix.de ([85.220.165.71]:49525 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2896557AbgJ0J5c (ORCPT ); Tue, 27 Oct 2020 05:57:32 -0400 Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kXLjK-0004UM-D8; Tue, 27 Oct 2020 10:57:26 +0100 Received: from ore by dude.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1kXLjJ-0004s7-Ql; Tue, 27 Oct 2020 10:57:25 +0100 From: Oleksij Rempel To: Dmitry Torokhov , Alexandru Ardelean , Mark Brown Cc: Oleksij Rempel , kernel@pengutronix.de, linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, linux-spi@vger.kernel.org, David Jander Subject: [PATCH v2 2/2] Input: ads7846: do not overwrite spi->mode flags set by spi framework Date: Tue, 27 Oct 2020 10:57:24 +0100 Message-Id: <20201027095724.18654-3-o.rempel@pengutronix.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201027095724.18654-1-o.rempel@pengutronix.de> References: <20201027095724.18654-1-o.rempel@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: ore@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-spi@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Do not overwrite spi->mode flags set by spi framework, otherwise the chip select polarity will get lost. Signed-off-by: Oleksij Rempel Acked-by: Dmitry Torokhov --- drivers/input/touchscreen/ads7846.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c index 8fd7fc39c4fd..f2dc2c8ab5ec 100644 --- a/drivers/input/touchscreen/ads7846.c +++ b/drivers/input/touchscreen/ads7846.c @@ -1288,7 +1288,8 @@ static int ads7846_probe(struct spi_device *spi) * may not. So we stick to very-portable 8 bit words, both RX and TX. */ spi->bits_per_word = 8; - spi->mode = SPI_MODE_0; + spi->mode &= ~SPI_MODE_X_MASK; + spi->mode |= SPI_MODE_0; err = spi_setup(spi); if (err < 0) return err;