From nobody Thu Jun 11 12:17:03 2026 Received: from ultrarisc.com (unknown [218.76.62.146]) by smtp.subspace.kernel.org (Postfix) with ESMTP id A69C5367F3A; Tue, 21 Apr 2026 06:00:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=218.76.62.146 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776751205; cv=none; b=d8RjYSdu1l2j+f7vLEedwFsK//lYQTk7TG5f1r9RLmqYJfiQQu+hhtuN6RJpGlzkvkWpgZSttaJ3i3/xoH9pXFSWeYuEr+M3S+KcbyYcpkJz6//vW6RiniK0SxlBRiWW5M3mqDnVphyhDQnDg9cTWoTImKbPUDo3XfuHHtRBVDA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776751205; c=relaxed/simple; bh=fd/GPuODvz6hEyhIIX23mIspVD0bj+TwDCa2egzIms4=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=j/xaJaMroRLRTIl0mJ1ESDceGCTwsTtz48+4/DNbk4szPu8RAlFTltHQagJhKaoK1OaHNPQYYCaOajiWbJMe1ScdJ6GcleW2OQNEMloz+5tQO32L+zGk/nhM8x67m7LqPjZFG+SiO7eSvanIhNQXRSvTfXWg5E87sbTXnXVia/I= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ultrarisc.com; spf=none smtp.mailfrom=ultrarisc.com; dkim=pass (1024-bit key) header.d=ultrarisc.com header.i=@ultrarisc.com header.b=EdX6J9y4; arc=none smtp.client-ip=218.76.62.146 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ultrarisc.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=ultrarisc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ultrarisc.com header.i=@ultrarisc.com header.b="EdX6J9y4" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ultrarisc.com; s=dkim; h=Received:From:Date:Subject: MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id: References:In-Reply-To:To:Cc; bh=IunV+g35Iv9Wif8Qwna4P1wIGXGPiiv nhH77S5h3sg8=; b=EdX6J9y4HTiBMUySpQhe1eugOQ72YhI5kFxFAHXJLD0CRIO 2ILuWwUpBZ4YsVeTU5jWKKB0Do+4guWPdvyAQzGxJcRiMk7Ck48QY2oK8H5Ljqvn Ax2i/CGcHOmHWbf0YGqOLPteZhQF89SPwhU8MF24kwLj9u2VMtacYp7N/Qrw= Received: from [127.0.0.1] (unknown [192.168.100.1]) by localhost.localdomain (Coremail) with SMTP id AQAAfwAnEkNyEudpn5ACAA--.1518S3; Tue, 21 Apr 2026 14:00:22 +0800 (CST) From: Jia Wang Date: Tue, 21 Apr 2026 13:58:51 +0800 Subject: [PATCH v3 1/2] dt-bindings: serial: snps-dw-apb-uart: Add UltraRISC DP1000 UART Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260421-ultrarisc-serial-v3-1-3d7f09c2420e@ultrarisc.com> References: <20260421-ultrarisc-serial-v3-0-3d7f09c2420e@ultrarisc.com> In-Reply-To: <20260421-ultrarisc-serial-v3-0-3d7f09c2420e@ultrarisc.com> To: =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Andy Shevchenko , Greg Kroah-Hartman , Jiri Slaby , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, Jia Wang X-Mailer: b4 0.15-dev X-Developer-Signature: v=1; a=ed25519-sha256; t=1776751174; l=887; i=wangjia@ultrarisc.com; s=20260309; h=from:subject:message-id; bh=fd/GPuODvz6hEyhIIX23mIspVD0bj+TwDCa2egzIms4=; b=2i7l2Hj3OGIs9vN1NC2cl2JWvsa6EaJM3B89Sp0O3lq6L/V1p0srR3MIXU0B0TT+Z6dI+9ne7 +m29PGkjIXOASIdgDWTJQ48tm4Kgovs+hTxcjjGfIT9uRw7dJwEBGz7 X-Developer-Key: i=wangjia@ultrarisc.com; a=ed25519; pk=XvYkrelqJIIzobY7j+nIg8rsfv5kzaOzuc1UPhd087U= X-CM-TRANSID: AQAAfwAnEkNyEudpn5ACAA--.1518S3 X-Coremail-Antispam: 1UD129KBjvdXoWrKF1UuFWkJF48CFWxXw43Jrb_yoWfGFb_C3 4xuayDXF45AFWFva1DAF4xtr1rZF47WF4rCrn8t3WDC34DZa98KFykKr90yw1rKr1rur4f ur93CryqkrsxGjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJ3UbIYCTnIWIevJa73UjIFyTuYvj4RJUUUUUUUU X-CM-SenderInfo: pzdqwylld63zxwud2x1vfou0bp/1tbiAQADEWnlor4ACwAHsP UltraRISC DP1000 integrates a Synopsys DesignWare APB UART, but it does not provide the standard CPR and UCV registers. Signed-off-by: Jia Wang Acked-by: Conor Dooley --- Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml | 1 + 1 file changed, 1 insertion(+) diff --git a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml= b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml index 6efe43089a74..f84600f66df8 100644 --- a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml +++ b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml @@ -77,6 +77,7 @@ properties: - starfive,jh7100-hsuart - starfive,jh7100-uart - starfive,jh7110-uart + - ultrarisc,dp1000-uart - const: snps,dw-apb-uart - const: snps,dw-apb-uart =20 --=20 2.34.1 From nobody Thu Jun 11 12:17:03 2026 Received: from ultrarisc.com (unknown [218.76.62.146]) by smtp.subspace.kernel.org (Postfix) with ESMTP id A7DD836826E; Tue, 21 Apr 2026 06:00:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=218.76.62.146 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776751205; cv=none; b=cbFF5Tj9fEcaFhu1SFqUmoPy90hjTkvxORewR4CD3s3062S2YxnnCiZ1YQWV5IAx/0nHP4RtSjpDRC1NkQWDddvuJBlXjyA2oTbmm9XZsJnux+D040tUBj2pJ1NAc8U7fohaEyiu58c1WEKivtv57+bILpaMB3AfxUkiJgKh37E= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776751205; c=relaxed/simple; bh=o2vQ1mjY+s3E7+IwbbZ2cAFAkNUbi8J2kxnxCeejBCY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=rYYuP8TP/OkSG9uhEvtIpyqBeQAA5iuyxBGppTASQxTxaU9maOYAOcaUIaguPC84dQk1LBzfSZaenbNERrlqUj45DWWVEL8O2a0TjUeleunODCX4yfr63GHnrXyV35+Lk4+wMW+C8Fjtep0m/BRPij2tV6mMdIOBiwQWZmL9L3g= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ultrarisc.com; spf=none smtp.mailfrom=ultrarisc.com; dkim=pass (1024-bit key) header.d=ultrarisc.com header.i=@ultrarisc.com header.b=aZUZRa8n; arc=none smtp.client-ip=218.76.62.146 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ultrarisc.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=ultrarisc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ultrarisc.com header.i=@ultrarisc.com header.b="aZUZRa8n" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ultrarisc.com; s=dkim; h=Received:From:Date:Subject: MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id: References:In-Reply-To:To:Cc; bh=pU4SxU5q9XltqS7pTAyz151B7uCmsjv J67qMEH2aIS8=; b=aZUZRa8nfERHquJ1KPg7aOkO0+T6b66/kGoZRPHo4LYvDCy L4T3pDhwJoULULWrzImA5UYIWm6hSfnhUm3MldpYkbPiknrCOebeVaVLMuZUqoTG 056perfi3Hby4eHCKk3vR+NG6xdWFDxNCOy5ML2rTbzW8Lp3jb0ZL53n705s= Received: from [127.0.0.1] (unknown [192.168.100.1]) by localhost.localdomain (Coremail) with SMTP id AQAAfwAnEkNyEudpn5ACAA--.1518S4; Tue, 21 Apr 2026 14:00:24 +0800 (CST) From: Jia Wang Date: Tue, 21 Apr 2026 13:58:52 +0800 Subject: [PATCH v3 2/2] serial: 8250_dw: Use a fixed CPR value for UltraRISC DP1000 UART Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260421-ultrarisc-serial-v3-2-3d7f09c2420e@ultrarisc.com> References: <20260421-ultrarisc-serial-v3-0-3d7f09c2420e@ultrarisc.com> In-Reply-To: <20260421-ultrarisc-serial-v3-0-3d7f09c2420e@ultrarisc.com> To: =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Andy Shevchenko , Greg Kroah-Hartman , Jiri Slaby , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, Jia Wang X-Mailer: b4 0.15-dev X-Developer-Signature: v=1; a=ed25519-sha256; t=1776751174; l=1571; i=wangjia@ultrarisc.com; s=20260309; h=from:subject:message-id; bh=o2vQ1mjY+s3E7+IwbbZ2cAFAkNUbi8J2kxnxCeejBCY=; b=gF8CwuBnMr4lURDDDwpznbbeJJQY59ELlnW8vpWfD7bhkk/Xx7L2JJUfJg7oXBO2309oNdzFf U2U18KcO2KtD7l1rC+cuZvMuPivRCC3fC6sEYJf8wPSDeIAiSKyHEqK X-Developer-Key: i=wangjia@ultrarisc.com; a=ed25519; pk=XvYkrelqJIIzobY7j+nIg8rsfv5kzaOzuc1UPhd087U= X-CM-TRANSID: AQAAfwAnEkNyEudpn5ACAA--.1518S4 X-Coremail-Antispam: 1UD129KBjvJXoW7tw4UJFy3Kw43tFWrXFW5Wrg_yoW8WrW5pF 47Cr90vF9a9F4jg3W2ya1vvFZ3ua12vFy2k39rK347tFn8tFyUAF1SkrWay3ZFgry0qrnF yF1Y9rW7Aa1xZa7anT9S1TB71UUUUUDqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnUUvcSsGvfC2KfnxnUUI43ZEXa7xR_UUUUUUUUU== X-CM-SenderInfo: pzdqwylld63zxwud2x1vfou0bp/1tbiAQADEWnlor4ACwAJsB The UltraRISC DP1000 UART does not provide the standard CPR register used by 8250_dw to discover port capabilities. Provide a fixed CPR value for the DP1000-specific compatible so the driver can configure the port correctly. Signed-off-by: Jia Wang --- drivers/tty/serial/8250/8250_dw.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/82= 50_dw.c index 94beadb4024d..ca6dbdf75918 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -962,6 +962,12 @@ static const struct dw8250_platform_data dw8250_intc10= ee =3D { .quirks =3D DW_UART_QUIRK_IER_KICK, }; =20 +static const struct dw8250_platform_data dw8250_ultrarisc_dp1000_data =3D { + .usr_reg =3D DW_UART_USR, + .cpr_value =3D 0x00022022, + .quirks =3D DW_UART_QUIRK_CPR_VALUE, +}; + static const struct of_device_id dw8250_of_match[] =3D { { .compatible =3D "snps,dw-apb-uart", .data =3D &dw8250_dw_apb }, { .compatible =3D "cavium,octeon-3860-uart", .data =3D &dw8250_octeon_386= 0_data }, @@ -969,6 +975,7 @@ static const struct of_device_id dw8250_of_match[] =3D { { .compatible =3D "renesas,rzn1-uart", .data =3D &dw8250_renesas_rzn1_dat= a }, { .compatible =3D "sophgo,sg2044-uart", .data =3D &dw8250_skip_set_rate_d= ata }, { .compatible =3D "starfive,jh7100-uart", .data =3D &dw8250_skip_set_rate= _data }, + { .compatible =3D "ultrarisc,dp1000-uart", .data =3D &dw8250_ultrarisc_dp= 1000_data }, { /* Sentinel */ } }; MODULE_DEVICE_TABLE(of, dw8250_of_match); --=20 2.34.1