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[93.227.135.64]) by smtp.googlemail.com with ESMTPSA id a186sm24182515wmh.1.2017.01.15.14.33.04 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 15 Jan 2017 14:33:04 -0800 (PST) From: Martin Blumenstingl To: linux-serial@vger.kernel.org, linux-amlogic@lists.infradead.org, jslaby@suse.com, gregkh@linuxfoundation.org, khilman@baylibre.com, carlo@caione.org Subject: [PATCH 1/4] tty: serial: meson: allow baud-rates higher than 115200 Date: Sun, 15 Jan 2017 23:32:52 +0100 Message-Id: <20170115223255.10350-2-martin.blumenstingl@googlemail.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170115223255.10350-1-martin.blumenstingl@googlemail.com> References: <20170115223255.10350-1-martin.blumenstingl@googlemail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170115_143327_520202_4367F783 X-CRM114-Status: UNSURE ( 9.56 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, Martin Blumenstingl , catalin.marinas@arm.com, will.deacon@arm.com, robh+dt@kernel.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The vendor driver allows setting baud-rates higher than 115200 baud. There is a check in the vendor driver which prevents using more than 115200 baud during startup, however it does not have such a check in .set_termios. Higher baud-rates are often used by the bluetooth modules embedded into the SDIO wifi chips (Amlogic devices use brcmfmac based wifi chips quite often, 2000000 baud seems to be a common value for the UART baud-rate in Amlogic's "libbt"). I have tested this on a Meson GXL device with uart_A (to which the bluetooth module is connected, where initialization times out with 115200 baud) and uart_AO (which I manually set to 2000000 baud and then connected with my USB UART adapter to that). Signed-off-by: Martin Blumenstingl Tested-by: Andreas Färber Acked-by: Kevin Hilman --- drivers/tty/serial/meson_uart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c index 6aea0f4a9165..60f16795d16b 100644 --- a/drivers/tty/serial/meson_uart.c +++ b/drivers/tty/serial/meson_uart.c @@ -364,7 +364,7 @@ static void meson_uart_set_termios(struct uart_port *port, writel(val, port->membase + AML_UART_CONTROL); - baud = uart_get_baud_rate(port, termios, old, 9600, 115200); + baud = uart_get_baud_rate(port, termios, old, 9600, 4000000); meson_uart_change_speed(port, baud); port->read_status_mask = AML_UART_TX_FIFO_WERR;