From patchwork Mon Mar 4 12:27:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 13580522 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 07975C48BF6 for ; Mon, 4 Mar 2024 12:31:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=uejSX0XUZwgZEvgMv+AfZq5ps+5Dgz7JPydJRkVkey0=; b=fRxo183bOsqNu+ StsD5DEaeA6VmI6PdcPIzZXdV+Y+yfReUaEF5uhy/txK3CXlaukd+hbwr2L9XazrDOrcOY7z+Riqq KPRHyn/arsg1C1L2X6rJb/Bd14qAvgGX9fOaxjMxdJuMBq3UdmkYI/hvTkzIsVgnZeg9sGQgMDGkh e44bIAV/ap6YMjIiWf8nBLnRIxE2IMf0CBo9/sQAKIZrA8jXrAHwQP1w0qmMURynRSVX3XFmrMSx9 oA0Ck7Mn1uQR+NRid43HY9elBCcKWVslerWb46PeWhP08G3Rr8Ya4ebAYHjA5+jB/7DdKtCdTB8k0 zSeuf6tr2M8F5E1HuFRQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rh7TP-00000008z5V-0NzT; Mon, 04 Mar 2024 12:31:15 +0000 Received: from mgamail.intel.com ([192.198.163.12]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rh7T3-00000008ylA-1ckb; Mon, 04 Mar 2024 12:30:56 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1709555453; x=1741091453; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=nVEDA7ZUIo9sof6a5P5qPlQ65k7G7XcDNwxgT3ojRHI=; b=Sei2b1iXthvn+Cbuok3z3bwuu+5RwI9u8CcOvk6Gf1Ml3c1ePKTwmmRn hyWcYLVOOXs+H1kbX5J/karBt4aG2nm2tkH2NCrMVGxP34t5GWXGahBTB mJNpaQvudnoCqk2HiZRQMK3meZrxUk2CUj/OCx8jVK3bJSVyPRESeje56 4qW1oD6hRTJdObqx/bSnOe6qDVVM4T3fb0YlGOnGaeAGxuORXc2xFftI7 fP1fV805z0R2xSIxCDvmmBR/DyRySH+EmHG/nrOoKmqcb+Byykgu09PMB fkdlo+8inG66H6zEk8JhedSeAPx0FrHl+OujWCZH9tySFMGRKdAWYKZdQ A==; X-IronPort-AV: E=McAfee;i="6600,9927,11002"; a="7815108" X-IronPort-AV: E=Sophos;i="6.06,203,1705392000"; d="scan'208";a="7815108" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmvoesa106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Mar 2024 04:30:50 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,11002"; a="937040426" X-IronPort-AV: E=Sophos;i="6.06,203,1705392000"; d="scan'208";a="937040426" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga001.fm.intel.com with ESMTP; 04 Mar 2024 04:30:44 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id 73BFF697; Mon, 4 Mar 2024 14:30:37 +0200 (EET) From: Andy Shevchenko To: Greg Kroah-Hartman , Andy Shevchenko , Florian Fainelli , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-aspeed@lists.ozlabs.org, linux-rpi-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-tegra@vger.kernel.org Cc: Jiri Slaby , Joel Stanley , Andrew Jeffery , Broadcom internal kernel review list , Ray Jui , Scott Branden , Al Cooper , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Paul Cercueil , Vladimir Zapolskiy , Thierry Reding , Jonathan Hunter , Kunihiko Hayashi , Masami Hiramatsu Subject: [PATCH v3 05/14] serial: 8250_bcm2835aux: Switch to use uart_read_port_properties() Date: Mon, 4 Mar 2024 14:27:06 +0200 Message-ID: <20240304123035.758700-6-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.43.0.rc1.1.gbec44491f096 In-Reply-To: <20240304123035.758700-1-andriy.shevchenko@linux.intel.com> References: <20240304123035.758700-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240304_043053_503622_9BD419F0 X-CRM114-Status: GOOD ( 24.43 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Since we have now a common helper to read port properties use it instead of sparse home grown solution. Signed-off-by: Andy Shevchenko Reviewed-by: Florian Fainelli Tested-by: Florian Fainelli --- drivers/tty/serial/8250/8250_bcm2835aux.c | 92 +++++++++++------------ 1 file changed, 42 insertions(+), 50 deletions(-) diff --git a/drivers/tty/serial/8250/8250_bcm2835aux.c b/drivers/tty/serial/8250/8250_bcm2835aux.c index beac6b340ace..121a5ce86050 100644 --- a/drivers/tty/serial/8250/8250_bcm2835aux.c +++ b/drivers/tty/serial/8250/8250_bcm2835aux.c @@ -45,10 +45,6 @@ struct bcm2835aux_data { u32 cntl; }; -struct bcm2835_aux_serial_driver_data { - resource_size_t offset; -}; - static void bcm2835aux_rs485_start_tx(struct uart_8250_port *up) { if (!(up->port.rs485.flags & SER_RS485_RX_DURING_TX)) { @@ -85,10 +81,9 @@ static void bcm2835aux_rs485_stop_tx(struct uart_8250_port *up) static int bcm2835aux_serial_probe(struct platform_device *pdev) { - const struct bcm2835_aux_serial_driver_data *bcm_data; + const struct software_node *bcm2835_swnode; struct uart_8250_port up = { }; struct bcm2835aux_data *data; - resource_size_t offset = 0; struct resource *res; unsigned int uartclk; int ret; @@ -101,12 +96,8 @@ static int bcm2835aux_serial_probe(struct platform_device *pdev) /* initialize data */ up.capabilities = UART_CAP_FIFO | UART_CAP_MINI; up.port.dev = &pdev->dev; - up.port.regshift = 2; up.port.type = PORT_16550; - up.port.iotype = UPIO_MEM; - up.port.fifosize = 8; - up.port.flags = UPF_SHARE_IRQ | UPF_FIXED_PORT | UPF_FIXED_TYPE | - UPF_SKIP_TEST | UPF_IOREMAP; + up.port.flags = UPF_FIXED_PORT | UPF_FIXED_TYPE | UPF_SKIP_TEST | UPF_IOREMAP; up.port.rs485_config = serial8250_em485_config; up.port.rs485_supported = serial8250_em485_supported; up.rs485_start_tx = bcm2835aux_rs485_start_tx; @@ -122,12 +113,6 @@ static int bcm2835aux_serial_probe(struct platform_device *pdev) if (IS_ERR(data->clk)) return dev_err_probe(&pdev->dev, PTR_ERR(data->clk), "could not get clk\n"); - /* get the interrupt */ - ret = platform_get_irq(pdev, 0); - if (ret < 0) - return ret; - up.port.irq = ret; - /* map the main registers */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { @@ -135,52 +120,40 @@ static int bcm2835aux_serial_probe(struct platform_device *pdev) return -EINVAL; } - bcm_data = device_get_match_data(&pdev->dev); + up.port.mapbase = res->start; + up.port.mapsize = resource_size(res); - /* Some UEFI implementations (e.g. tianocore/edk2 for the Raspberry Pi) - * describe the miniuart with a base address that encompasses the auxiliary - * registers shared between the miniuart and spi. - * - * This is due to historical reasons, see discussion here : - * https://edk2.groups.io/g/devel/topic/87501357#84349 - * - * We need to add the offset between the miniuart and auxiliary - * registers to get the real miniuart base address. - */ - if (bcm_data) - offset = bcm_data->offset; + bcm2835_swnode = device_get_match_data(&pdev->dev); + if (bcm2835_swnode) { + ret = device_add_software_node(&pdev->dev, bcm2835_swnode); + if (ret) + return ret; + } - up.port.mapbase = res->start + offset; - up.port.mapsize = resource_size(res) - offset; + ret = uart_read_port_properties(&up.port); + if (ret) + goto rm_swnode; - /* Check for a fixed line number */ - ret = of_alias_get_id(pdev->dev.of_node, "serial"); - if (ret >= 0) - up.port.line = ret; + up.port.regshift = 2; + up.port.fifosize = 8; /* enable the clock as a last step */ ret = clk_prepare_enable(data->clk); if (ret) { - dev_err(&pdev->dev, "unable to enable uart clock - %d\n", - ret); - return ret; + dev_err_probe(&pdev->dev, ret, "unable to enable uart clock\n"); + goto rm_swnode; } uartclk = clk_get_rate(data->clk); - if (!uartclk) { - ret = device_property_read_u32(&pdev->dev, "clock-frequency", &uartclk); - if (ret) { - dev_err_probe(&pdev->dev, ret, "could not get clk rate\n"); - goto dis_clk; - } - } + if (uartclk) + up.port.uartclk = uartclk; /* the HW-clock divider for bcm2835aux is 8, * but 8250 expects a divider of 16, * so we have to multiply the actual clock by 2 * to get identical baudrates. */ - up.port.uartclk = uartclk * 2; + up.port.uartclk *= 2; /* register the port */ ret = serial8250_register_8250_port(&up); @@ -194,6 +167,8 @@ static int bcm2835aux_serial_probe(struct platform_device *pdev) dis_clk: clk_disable_unprepare(data->clk); +rm_swnode: + device_remove_software_node(&pdev->dev); return ret; } @@ -203,10 +178,27 @@ static void bcm2835aux_serial_remove(struct platform_device *pdev) serial8250_unregister_port(data->line); clk_disable_unprepare(data->clk); + device_remove_software_node(&pdev->dev); } -static const struct bcm2835_aux_serial_driver_data bcm2835_acpi_data = { - .offset = 0x40, +/* + * Some UEFI implementations (e.g. tianocore/edk2 for the Raspberry Pi) + * describe the miniuart with a base address that encompasses the auxiliary + * registers shared between the miniuart and spi. + * + * This is due to historical reasons, see discussion here: + * https://edk2.groups.io/g/devel/topic/87501357#84349 + * + * We need to add the offset between the miniuart and auxiliary registers + * to get the real miniuart base address. + */ +static const struct property_entry bcm2835_acpi_properties[] = { + PROPERTY_ENTRY_U32("reg-offset", 0x40), + { } +}; + +static const struct software_node bcm2835_acpi_node = { + .properties = bcm2835_acpi_properties, }; static const struct of_device_id bcm2835aux_serial_match[] = { @@ -216,7 +208,7 @@ static const struct of_device_id bcm2835aux_serial_match[] = { MODULE_DEVICE_TABLE(of, bcm2835aux_serial_match); static const struct acpi_device_id bcm2835aux_serial_acpi_match[] = { - { "BCM2836", (kernel_ulong_t)&bcm2835_acpi_data }, + { "BCM2836", (kernel_ulong_t)&bcm2835_acpi_node }, { } }; MODULE_DEVICE_TABLE(acpi, bcm2835aux_serial_acpi_match);