From patchwork Mon May 17 14:03:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 440433 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BB2C9C433ED for ; Mon, 17 May 2021 14:03:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9D334611EE for ; Mon, 17 May 2021 14:03:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237696AbhEQOFC (ORCPT ); Mon, 17 May 2021 10:05:02 -0400 Received: from mga11.intel.com ([192.55.52.93]:59401 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237698AbhEQOEz (ORCPT ); Mon, 17 May 2021 10:04:55 -0400 IronPort-SDR: RMV/LUNUA+Cf4mF+OUmvDSqgsk5GxRJz2s0PY5LMzRU/3023wjwb8aSN6QzWilKz4SS6ufoAqz x8soKToGfaLg== X-IronPort-AV: E=McAfee;i="6200,9189,9986"; a="197388012" X-IronPort-AV: E=Sophos;i="5.82,307,1613462400"; d="scan'208";a="197388012" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 May 2021 07:03:36 -0700 IronPort-SDR: A9TCXsoFi4Y4oPVncf/BNgR2xI6V6hl0tFWU40gl3f57FeOgTgro3mZKzK6i4hHTGlWgO8Umut PjluE9Rk7C5Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.82,307,1613462400"; d="scan'208";a="432671162" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga007.jf.intel.com with ESMTP; 17 May 2021 07:03:33 -0700 Received: by black.fi.intel.com (Postfix, from userid 1003) id 23FF6752; Mon, 17 May 2021 17:03:55 +0300 (EEST) From: Andy Shevchenko To: Andy Shevchenko , Mark Brown , linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Daniel Mack , Haojian Zhuang , Robert Jarzmik Subject: [PATCH v1 3/9] spi: pxa2xx: Switch to use SPI core GPIO (legacy) CS handling Date: Mon, 17 May 2021 17:03:45 +0300 Message-Id: <20210517140351.901-4-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210517140351.901-1-andriy.shevchenko@linux.intel.com> References: <20210517140351.901-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org SPI core has been already providing the GPIO CS handling. Use it. Signed-off-by: Andy Shevchenko --- drivers/spi/spi-pxa2xx.c | 59 ++++++++++++++++++---------------------- drivers/spi/spi-pxa2xx.h | 12 ++++---- 2 files changed, 32 insertions(+), 39 deletions(-) diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index d19cea4ed946..1a0bcd3bac1f 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -441,11 +441,6 @@ static void cs_assert(struct spi_device *spi) return; } - if (chip->gpiod_cs) { - gpiod_set_value(chip->gpiod_cs, chip->gpio_cs_inverted); - return; - } - if (is_lpss_ssp(drv_data)) lpss_ssp_cs_control(spi, true); } @@ -471,11 +466,6 @@ static void cs_deassert(struct spi_device *spi) return; } - if (chip->gpiod_cs) { - gpiod_set_value(chip->gpiod_cs, !chip->gpio_cs_inverted); - return; - } - if (is_lpss_ssp(drv_data)) lpss_ssp_cs_control(spi, false); } @@ -1195,11 +1185,19 @@ static int pxa2xx_spi_unprepare_transfer(struct spi_controller *controller) return 0; } +static void cleanup_cs(struct spi_device *spi) +{ + if (!gpio_is_valid(spi->cs_gpio)) + return; + + gpio_free(spi->cs_gpio); + spi->cs_gpio = -ENOENT; +} + static int setup_cs(struct spi_device *spi, struct chip_data *chip, struct pxa2xx_spi_chip *chip_info) { - struct gpio_desc *gpiod; - int err = 0; + struct driver_data *drv_data = spi_controller_get_devdata(spi->controller); if (chip == NULL) return 0; @@ -1207,13 +1205,13 @@ static int setup_cs(struct spi_device *spi, struct chip_data *chip, if (chip_info == NULL) return 0; + if (drv_data->ssp_type == CE4100_SSP) + return 0; + /* NOTE: setup() can be called multiple times, possibly with * different chip_info, release previously requested GPIO */ - if (chip->gpiod_cs) { - gpiod_put(chip->gpiod_cs); - chip->gpiod_cs = NULL; - } + cleanup_cs(spi); /* If (*cs_control) is provided, ignore GPIO chip select */ if (chip_info->cs_control) { @@ -1222,21 +1220,25 @@ static int setup_cs(struct spi_device *spi, struct chip_data *chip, } if (gpio_is_valid(chip_info->gpio_cs)) { - err = gpio_request(chip_info->gpio_cs, "SPI_CS"); + int gpio = chip_info->gpio_cs; + int err; + + err = gpio_request(gpio, "SPI_CS"); if (err) { - dev_err(&spi->dev, "failed to request chip select GPIO%d\n", - chip_info->gpio_cs); + dev_err(&spi->dev, "failed to request chip select GPIO%d\n", gpio); return err; } - gpiod = gpio_to_desc(chip_info->gpio_cs); - chip->gpiod_cs = gpiod; - chip->gpio_cs_inverted = spi->mode & SPI_CS_HIGH; + err = gpio_direction_output(gpio, !(spi->mode & SPI_CS_HIGH)); + if (err) { + gpio_free(gpio); + return err; + } - err = gpiod_direction_output(gpiod, !chip->gpio_cs_inverted); + spi->cs_gpio = gpio; } - return err; + return 0; } static int setup(struct spi_device *spi) @@ -1411,15 +1413,8 @@ static int setup(struct spi_device *spi) static void cleanup(struct spi_device *spi) { struct chip_data *chip = spi_get_ctldata(spi); - struct driver_data *drv_data = - spi_controller_get_devdata(spi->controller); - - if (!chip) - return; - - if (drv_data->ssp_type != CE4100_SSP && chip->gpiod_cs) - gpiod_put(chip->gpiod_cs); + cleanup_cs(spi); kfree(chip); } diff --git a/drivers/spi/spi-pxa2xx.h b/drivers/spi/spi-pxa2xx.h index 672dfd4863cc..a91fe6edb275 100644 --- a/drivers/spi/spi-pxa2xx.h +++ b/drivers/spi/spi-pxa2xx.h @@ -62,19 +62,17 @@ struct chip_data { u32 dds_rate; u32 timeout; u8 n_bytes; + u8 enable_dma; u32 dma_burst_size; - u32 threshold; u32 dma_threshold; + u32 threshold; u16 lpss_rx_threshold; u16 lpss_tx_threshold; - u8 enable_dma; - union { - struct gpio_desc *gpiod_cs; - unsigned int frm; - }; - int gpio_cs_inverted; + int (*write)(struct driver_data *drv_data); int (*read)(struct driver_data *drv_data); + + unsigned int frm; void (*cs_control)(u32 command); };