From patchwork Fri May 25 17:19:41 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Radu Pirea X-Patchwork-Id: 10428075 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id C189B6053B for ; Fri, 25 May 2018 17:20:26 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A6DDA29711 for ; Fri, 25 May 2018 17:20:26 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9B9762972F; Fri, 25 May 2018 17:20:26 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C9EE02972B for ; Fri, 25 May 2018 17:20:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S967562AbeEYRUH (ORCPT ); Fri, 25 May 2018 13:20:07 -0400 Received: from esa4.microchip.iphmx.com ([68.232.154.123]:36808 "EHLO esa4.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S967542AbeEYRT7 (ORCPT ); Fri, 25 May 2018 13:19:59 -0400 X-IronPort-AV: E=Sophos;i="5.49,440,1520924400"; d="scan'208";a="14357832" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa4.microchip.iphmx.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 25 May 2018 10:19:59 -0700 Received: from m19893.microchip.com (10.10.76.4) by chn-sv-exch04.mchp-main.com (10.10.76.105) with Microsoft SMTP Server id 14.3.352.0; Fri, 25 May 2018 10:19:58 -0700 From: Radu Pirea To: , , , , , , , CC: , , , , , Radu Pirea Subject: [PATCH v4 6/6] tty/serial: atmel: changed the driver to work under at91-usart mfd Date: Fri, 25 May 2018 20:19:41 +0300 Message-ID: <20180525171941.26766-7-radu.pirea@microchip.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180525171941.26766-1-radu.pirea@microchip.com> References: <20180525171941.26766-1-radu.pirea@microchip.com> MIME-Version: 1.0 Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch modifies the place where resources and device tree properties are searched. Signed-off-by: Radu Pirea --- drivers/tty/serial/Kconfig | 1 + drivers/tty/serial/atmel_serial.c | 40 +++++++++++++++++-------------- 2 files changed, 23 insertions(+), 18 deletions(-) diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 3682fd3e960c..25e55332f8b1 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -119,6 +119,7 @@ config SERIAL_ATMEL depends on ARCH_AT91 || COMPILE_TEST select SERIAL_CORE select SERIAL_MCTRL_GPIO if GPIOLIB + select MFD_AT91_USART help This enables the driver for the on-chip UARTs of the Atmel AT91 processors. diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index df46a9e88c34..740c7d7f4a0c 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -193,8 +193,8 @@ static struct console atmel_console; #if defined(CONFIG_OF) static const struct of_device_id atmel_serial_dt_ids[] = { - { .compatible = "atmel,at91rm9200-usart" }, - { .compatible = "atmel,at91sam9260-usart" }, + { .compatible = "atmel,at91rm9200-usart-serial" }, + { .compatible = "atmel,at91sam9260-usart-serial" }, { /* sentinel */ } }; #endif @@ -915,6 +915,7 @@ static void atmel_tx_dma(struct uart_port *port) static int atmel_prepare_tx_dma(struct uart_port *port) { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + struct device *mfd_dev = port->dev->parent; dma_cap_mask_t mask; struct dma_slave_config config; int ret, nent; @@ -922,7 +923,7 @@ static int atmel_prepare_tx_dma(struct uart_port *port) dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); - atmel_port->chan_tx = dma_request_slave_channel(port->dev, "tx"); + atmel_port->chan_tx = dma_request_slave_channel(mfd_dev, "tx"); if (atmel_port->chan_tx == NULL) goto chan_err; dev_info(port->dev, "using %s for tx DMA transfers\n", @@ -1093,6 +1094,7 @@ static void atmel_rx_from_dma(struct uart_port *port) static int atmel_prepare_rx_dma(struct uart_port *port) { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + struct device *mfd_dev = port->dev->parent; struct dma_async_tx_descriptor *desc; dma_cap_mask_t mask; struct dma_slave_config config; @@ -1104,7 +1106,7 @@ static int atmel_prepare_rx_dma(struct uart_port *port) dma_cap_zero(mask); dma_cap_set(DMA_CYCLIC, mask); - atmel_port->chan_rx = dma_request_slave_channel(port->dev, "rx"); + atmel_port->chan_rx = dma_request_slave_channel(mfd_dev, "rx"); if (atmel_port->chan_rx == NULL) goto chan_err; dev_info(port->dev, "using %s for rx DMA transfers\n", @@ -1631,7 +1633,7 @@ static void atmel_tasklet_tx_func(unsigned long data) static void atmel_init_property(struct atmel_uart_port *atmel_port, struct platform_device *pdev) { - struct device_node *np = pdev->dev.of_node; + struct device_node *np = pdev->dev.parent->of_node; /* DMA/PDC usage specification */ if (of_property_read_bool(np, "atmel,use-dma-rx")) { @@ -2222,8 +2224,8 @@ static const char *atmel_type(struct uart_port *port) */ static void atmel_release_port(struct uart_port *port) { - struct platform_device *pdev = to_platform_device(port->dev); - int size = pdev->resource[0].end - pdev->resource[0].start + 1; + struct platform_device *mpdev = to_platform_device(port->dev->parent); + int size = resource_size(mpdev->resource); release_mem_region(port->mapbase, size); @@ -2238,8 +2240,8 @@ static void atmel_release_port(struct uart_port *port) */ static int atmel_request_port(struct uart_port *port) { - struct platform_device *pdev = to_platform_device(port->dev); - int size = pdev->resource[0].end - pdev->resource[0].start + 1; + struct platform_device *mpdev = to_platform_device(port->dev->parent); + int size = resource_size(mpdev->resource); if (!request_mem_region(port->mapbase, size, "atmel_serial")) return -EBUSY; @@ -2341,27 +2343,28 @@ static int atmel_init_port(struct atmel_uart_port *atmel_port, { int ret; struct uart_port *port = &atmel_port->uart; + struct platform_device *mpdev = to_platform_device(pdev->dev.parent); atmel_init_property(atmel_port, pdev); atmel_set_ops(port); - uart_get_rs485_mode(&pdev->dev, &port->rs485); + uart_get_rs485_mode(&mpdev->dev, &port->rs485); port->iotype = UPIO_MEM; port->flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP; port->ops = &atmel_pops; port->fifosize = 1; port->dev = &pdev->dev; - port->mapbase = pdev->resource[0].start; - port->irq = pdev->resource[1].start; + port->mapbase = mpdev->resource[0].start; + port->irq = mpdev->resource[1].start; port->rs485_config = atmel_config_rs485; - port->membase = NULL; + port->membase = NULL; memset(&atmel_port->rx_ring, 0, sizeof(atmel_port->rx_ring)); /* for console, the clock could already be configured */ if (!atmel_port->clk) { - atmel_port->clk = clk_get(&pdev->dev, "usart"); + atmel_port->clk = clk_get(&mpdev->dev, "usart"); if (IS_ERR(atmel_port->clk)) { ret = PTR_ERR(atmel_port->clk); atmel_port->clk = NULL; @@ -2652,11 +2655,13 @@ static int atmel_serial_resume(struct platform_device *pdev) static void atmel_serial_probe_fifos(struct atmel_uart_port *atmel_port, struct platform_device *pdev) { + struct device *dev = pdev->dev.parent; + atmel_port->fifo_size = 0; atmel_port->rts_low = 0; atmel_port->rts_high = 0; - if (of_property_read_u32(pdev->dev.of_node, + if (of_property_read_u32(dev->of_node, "atmel,fifo-size", &atmel_port->fifo_size)) return; @@ -2694,11 +2699,10 @@ static void atmel_serial_probe_fifos(struct atmel_uart_port *atmel_port, static int atmel_serial_probe(struct platform_device *pdev) { struct atmel_uart_port *atmel_port; - struct device_node *np = pdev->dev.of_node; + struct device_node *np = pdev->dev.parent->of_node; void *data; int ret = -ENODEV; bool rs485_enabled; - BUILD_BUG_ON(ATMEL_SERIAL_RINGSIZE & (ATMEL_SERIAL_RINGSIZE - 1)); ret = of_alias_get_id(np, "serial"); @@ -2845,7 +2849,7 @@ static struct platform_driver atmel_serial_driver = { .suspend = atmel_serial_suspend, .resume = atmel_serial_resume, .driver = { - .name = "atmel_usart", + .name = "atmel_usart_serial", .of_match_table = of_match_ptr(atmel_serial_dt_ids), }, };