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Wed, 5 Jul 2023 21:18:39 +0300 From: Dmitry Rokosov To: , , , , , , , , CC: , , , , , , , , , Dmitry Rokosov Subject: [PATCH v2 0/7] tty: serial: meson: support ttyS devname Date: Wed, 5 Jul 2023 21:18:26 +0300 Message-ID: <20230705181833.16137-1-ddrokosov@sberdevices.ru> X-Mailer: git-send-email 2.36.0 MIME-Version: 1.0 X-Originating-IP: [100.64.160.123] X-ClientProxiedBy: p-i-exch-sc-m02.sberdevices.ru (172.16.192.103) To p-i-exch-sc-m01.sberdevices.ru (172.16.192.107) X-KSMG-Rule-ID: 10 X-KSMG-Message-Action: clean X-KSMG-AntiSpam-Lua-Profiles: 178461 [Jul 05 2023] X-KSMG-AntiSpam-Version: 5.9.59.0 X-KSMG-AntiSpam-Envelope-From: DDRokosov@sberdevices.ru X-KSMG-AntiSpam-Rate: 0 X-KSMG-AntiSpam-Status: not_detected X-KSMG-AntiSpam-Method: none X-KSMG-AntiSpam-Auth: dkim=none X-KSMG-AntiSpam-Info: LuaCore: 520 520 ccb018a655251011855942a2571029252d3d69a2, {Tracking_uf_ne_domains}, {Tracking_from_domain_doesnt_match_to}, libera.irclog.whitequark.org:7.1.1;p-i-exch-sc-m01.sberdevices.ru:7.1.1,5.0.1;d41d8cd98f00b204e9800998ecf8427e.com:7.1.1;lore.kernel.org:7.1.1;sberdevices.ru:7.1.1,5.0.1;127.0.0.199:7.1.2;100.64.160.123:7.1.2, FromAlignment: s, {Tracking_white_helo}, ApMailHostAddress: 100.64.160.123 X-MS-Exchange-Organization-SCL: -1 X-KSMG-AntiSpam-Interceptor-Info: scan successful X-KSMG-AntiPhishing: Clean, bases: 2023/07/05 16:50:00 X-KSMG-LinksScanning: Clean, bases: 2023/07/05 16:49:00 X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 2.0.1.6960, bases: 2023/07/05 14:57:00 #21566867 X-KSMG-AntiVirus-Status: Clean, skipped X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230705_111849_249578_5039ABB7 X-CRM114-Status: GOOD ( 13.65 ) 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 During a IRC discussion with Neil, as reported in reference [1], an idea emerged to provide support for a standard devname 'ttyS' in new SoCs such as A1, S4, T7, C3 and others. The current devname 'ttyAML' is not widely known and has caused several issues with both low and high-level software, without any apparent justification for its implementation. Consequently, it has been deemed necessary to introduce the 'ttyS' devname for all new 'compatible' entries, while still retaining backward compatibility with the old 'ttyAML' devname by supporting it in parallel with the new approach. This patch series therefore aims to implement these changes. Changes v2 since v1 at [2]: - as suggested by Conor, relocate modifications with the new uart_data structures of S4 and A1 SoC from the main meson_uart patchset to a separate patchsets - ensure that the uart_driver is not unregistered if there is at least one active port - per Neil's suggestion declare separate uart_driver and console objects for both tty devnames (ttyAML and ttyS) to enable the use of multiple uart objects with different compatibility strings Links: [1]: https://libera.irclog.whitequark.org/linux-amlogic/2023-07-03 [2]: https://lore.kernel.org/linux-amlogic/20230704135936.14697-1-ddrokosov@sberdevices.ru/ Dmitry Rokosov (7): tty: serial: meson: use dev_err_probe tty: serial: meson: redesign the module to platform_driver tty: serial: meson: apply ttyS devname instead of ttyAML for new SoCs tty: serial: meson: introduce separate uart_data for S4 SoC family tty: serial: meson: add independent uart_data for A1 SoC family dt-bindings: serial: amlogic,meson-uart: support Amlogic A1 arm64: dts: meson: a1: change uart compatible string .../bindings/serial/amlogic,meson-uart.yaml | 2 + arch/arm64/boot/dts/amlogic/meson-a1.dtsi | 4 +- drivers/tty/serial/meson_uart.c | 145 ++++++++++-------- 3 files changed, 88 insertions(+), 63 deletions(-)