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Wed, 3 Apr 2024 07:41:40 +0000 Received: from PSAPR06MB4952.apcprd06.prod.outlook.com ([fe80::45cb:f62c:d9bc:b12b]) by PSAPR06MB4952.apcprd06.prod.outlook.com ([fe80::45cb:f62c:d9bc:b12b%7]) with mapi id 15.20.7409.042; Wed, 3 Apr 2024 07:41:40 +0000 From: Guanbing Huang To: gregkh@linuxfoundation.org, andriy.shevchenko@intel.com, rafael.j.wysocki@intel.com Cc: linux-acpi@vger.kernel.org, tony@atomide.com, john.ogness@linutronix.de, yangyicong@hisilicon.com, jirislaby@kernel.org, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, lvjianmin@loongson.cn, albanhuang@tencent.com, tombinfan@tencent.com Subject: [PATCH v4 0/3] serial: 8250_pnp: Support configurable reg shift property Date: Wed, 3 Apr 2024 15:41:27 +0800 Message-ID: X-Mailer: git-send-email 2.17.1 Content-Type: text/plain X-TMN: [KOut+fD3pxOctsiPMJgwofpbhdruQFIO] X-ClientProxiedBy: SI1PR02CA0053.apcprd02.prod.outlook.com (2603:1096:4:1f5::8) To PSAPR06MB4952.apcprd06.prod.outlook.com (2603:1096:301:a3::11) X-Microsoft-Original-Message-ID: <20240403074130.93811-1-albanhuang@outlook.com> Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PSAPR06MB4952:EE_|TYZPR06MB7169:EE_ X-MS-Office365-Filtering-Correlation-Id: 80144fb7-8466-4424-e4dc-08dc53b17fbf X-Microsoft-Antispam: BCL:0; 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In the ACPI scenario, If the reg-shift property is not configured like in DTS, the 16550a serial driver cannot read or write controller registers properly during initialization. To address the issue of configuring the reg-shift property, the __uart_read_properties() universal interface is called to implement it. Adaptation of pnp devices is done in the __uart_read_properties() function. Guanbing Huang (3): pnp: Add dev_is_pnp() macro serial: 8250_port: Add support of pnp irq to __uart_read_properties() serial: 8250_pnp: Support configurable reg shift property drivers/tty/serial/8250/8250_pnp.c | 36 ++++++++++++++++++++---------- drivers/tty/serial/serial_port.c | 7 +++++- include/linux/pnp.h | 2 ++ 3 files changed, 32 insertions(+), 13 deletions(-) -- 2.17.1