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Ip=[149.199.60.83]; Helo=[xsj-pvapsmtpgw01] X-MS-Exchange-CrossTenant-AuthSource: DM3NAM02FT016.eop-nam02.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR02MB2455 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add the arm,xlnx-sbsa-uart compatible. Xilinx versal uart is similar to sbsa-uart except that it has termios configurable. Signed-off-by: Shubhrajyoti Datta --- Documentation/devicetree/bindings/serial/pl011.yaml | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/serial/pl011.yaml b/Documentation/devicetree/bindings/serial/pl011.yaml index c23c93b..6e123b1 100644 --- a/Documentation/devicetree/bindings/serial/pl011.yaml +++ b/Documentation/devicetree/bindings/serial/pl011.yaml @@ -20,6 +20,7 @@ select: enum: - arm,pl011 - zte,zx296702-uart + - arm,xlnx-sbsa-uart required: - compatible @@ -32,6 +33,7 @@ properties: - items: - const: zte,zx296702-uart - const: arm,primecell + - const: arm,xlnx-sbsa-uart reg: maxItems: 1 From patchwork Wed Aug 19 16:43:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shubhrajyoti Datta X-Patchwork-Id: 253608 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=-12.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 6DA22C433E1 for ; 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Wed, 19 Aug 2020 09:44:07 -0700 From: Shubhrajyoti Datta To: linux-serial@vger.kernel.org Cc: devicetree@vger.kernel.org, jslaby@suse.com, robh+dt@kernel.org, git-dev@xilinx.com, gregkh@linuxfoundation.org, Shubhrajyoti Datta Subject: [PATCH 2/2] tty: pl011: Add support for xilinx uart Date: Wed, 19 Aug 2020 22:13:59 +0530 Message-Id: <1597855439-746-2-git-send-email-shubhrajyoti.datta@xilinx.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1597855439-746-1-git-send-email-shubhrajyoti.datta@xilinx.com> References: <1597855439-746-1-git-send-email-shubhrajyoti.datta@xilinx.com> X-RCIS-Action: ALLOW X-TM-AS-Product-Ver: IMSS-7.1.0.1224-8.2.0.1013-23620.005 X-TM-AS-User-Approved-Sender: Yes;Yes X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-MS-PublicTrafficType: Email MIME-Version: 1.0 X-MS-Office365-Filtering-Correlation-Id: d82e202e-84c1-481f-5451-08d8445f1ce0 X-MS-TrafficTypeDiagnostic: BN8PR02MB5873: X-Microsoft-Antispam-PRVS: X-Auto-Response-Suppress: DR, RN, NRN, OOF, AutoReply X-MS-Oob-TLC-OOBClassifiers: OLM:5236; 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X-OriginatorOrg: xilinx.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Aug 2020 16:44:16.9900 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d82e202e-84c1-481f-5451-08d8445f1ce0 X-MS-Exchange-CrossTenant-Id: 657af505-d5df-48d0-8300-c31994686c5c X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=657af505-d5df-48d0-8300-c31994686c5c; Ip=[149.199.60.83]; Helo=[xsj-pvapsmtpgw01] X-MS-Exchange-CrossTenant-AuthSource: SN1NAM02FT062.eop-nam02.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN8PR02MB5873 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Xilinx uart is similar to sbsa but it has configurable parity and hardware flow. Add a compatible for the same. Signed-off-by: Shubhrajyoti Datta --- drivers/tty/serial/amba-pl011.c | 77 ++++++++++++++++++++++++++++++++++++++++- 1 file changed, 76 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 8efd7c2..41dbcee 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -2073,6 +2073,55 @@ sbsa_uart_set_termios(struct uart_port *port, struct ktermios *termios, spin_unlock_irqrestore(&port->lock, flags); } +static void +xlnx_sbsa_uart_set_termios(struct uart_port *port, struct ktermios *termios, + struct ktermios *old) +{ + struct uart_amba_port *uap = + container_of(port, struct uart_amba_port, port); + unsigned long flags; + unsigned int lcr_h, old_cr; + + tty_termios_encode_baud_rate(termios, uap->fixed_baud, uap->fixed_baud); + /* The SBSA UART only supports 8n1 without hardware flow control. */ + termios->c_cflag &= ~(CMSPAR | CRTSCTS); + switch (termios->c_cflag & CSIZE) { + case CS5: + lcr_h = UART01x_LCRH_WLEN_5; + break; + case CS6: + lcr_h = UART01x_LCRH_WLEN_6; + break; + case CS7: + lcr_h = UART01x_LCRH_WLEN_7; + break; + default: + lcr_h = UART01x_LCRH_WLEN_8; + break; + } + if (termios->c_cflag & CSTOPB) + lcr_h |= UART01x_LCRH_STP2; + if (termios->c_cflag & PARENB) { + lcr_h |= UART01x_LCRH_PEN; + if (!(termios->c_cflag & PARODD)) + lcr_h |= UART01x_LCRH_EPS; + if (termios->c_cflag & CMSPAR) + lcr_h |= UART011_LCRH_SPS; + } + if (uap->fifosize > 1) + lcr_h |= UART01x_LCRH_FEN; + + spin_lock_irqsave(&port->lock, flags); + uart_update_timeout(port, CS8, uap->fixed_baud); + pl011_setup_status_masks(port, termios); + /* first, disable everything */ + old_cr = pl011_read(uap, REG_CR); + pl011_write(0, uap, REG_CR); + pl011_write_lcr_h(uap, lcr_h); + pl011_write(old_cr, uap, REG_CR); + spin_unlock_irqrestore(&port->lock, flags); +} + static const char *pl011_type(struct uart_port *port) { struct uart_amba_port *uap = @@ -2179,6 +2228,28 @@ static const struct uart_ops sbsa_uart_pops = { #endif }; +static const struct uart_ops xlnx_sbsa_uart_pops = { + .tx_empty = pl011_tx_empty, + .set_mctrl = sbsa_uart_set_mctrl, + .get_mctrl = sbsa_uart_get_mctrl, + .stop_tx = pl011_stop_tx, + .start_tx = pl011_start_tx, + .stop_rx = pl011_stop_rx, + .startup = sbsa_uart_startup, + .shutdown = sbsa_uart_shutdown, + .set_termios = xlnx_sbsa_uart_set_termios, + .type = pl011_type, + .release_port = pl011_release_port, + .request_port = pl011_request_port, + .config_port = pl011_config_port, + .verify_port = pl011_verify_port, +#ifdef CONFIG_CONSOLE_POLL + .poll_init = pl011_hwinit, + .poll_get_char = pl011_get_poll_char, + .poll_put_char = pl011_put_poll_char, +#endif +}; + static struct uart_amba_port *amba_ports[UART_NR]; #ifdef CONFIG_SERIAL_AMBA_PL011_CONSOLE @@ -2754,7 +2825,10 @@ static int sbsa_uart_probe(struct platform_device *pdev) uap->reg_offset = uap->vendor->reg_offset; uap->fifosize = 32; uap->port.iotype = uap->vendor->access_32b ? UPIO_MEM32 : UPIO_MEM; - uap->port.ops = &sbsa_uart_pops; + if (of_device_is_compatible(pdev->dev.of_node, "arm,xlnx-sbsa-uart")) + uap->port.ops = &xlnx_sbsa_uart_pops; + else + uap->port.ops = &sbsa_uart_pops; uap->fixed_baud = baudrate; snprintf(uap->type, sizeof(uap->type), "SBSA"); @@ -2781,6 +2855,7 @@ static int sbsa_uart_remove(struct platform_device *pdev) static const struct of_device_id sbsa_uart_of_match[] = { { .compatible = "arm,sbsa-uart", }, + { .compatible = "arm,xlnx-sbsa-uart", }, {}, }; MODULE_DEVICE_TABLE(of, sbsa_uart_of_match);