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([82.78.167.53]) by smtp.gmail.com with ESMTPSA id r18-20020a05600c35d200b00418d434ae4esm16292565wmq.10.2024.04.22.04.11.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 22 Apr 2024 04:11:25 -0700 (PDT) From: Claudiu X-Google-Original-From: Claudiu To: gregkh@linuxfoundation.org, jirislaby@kernel.org, geert+renesas@glider.be, ulf.hansson@linaro.org Cc: linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, linux-pm@vger.kernel.org, claudiu.beznea@tuxon.dev Subject: [PATCH] serial: sh-sci: Call device_set_wakeup_path() for serial console Date: Mon, 22 Apr 2024 14:11:23 +0300 Message-Id: <20240422111123.1622967-1-claudiu.beznea.uj@bp.renesas.com> X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Claudiu Beznea In case the SCI is used as a UART console, no_console_suspend is available in bootargs and SCI is part of a software-controlled power domain we need to call device_set_wakeup_path(). This lets the power domain core code knows that this domain should not be powered off durring system suspend. Otherwise, the SCI power domain is turned off, nothing is printed while suspending and the suspend/resume process is blocked. This was detected on the RZ/G3S SoC while adding support for power domains. Signed-off-by: Claudiu Beznea Tested-by: Geert Uytterhoeven --- drivers/tty/serial/sh-sci.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 97031db26ae4..57a7f18e16e4 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -3441,8 +3441,12 @@ static __maybe_unused int sci_suspend(struct device *dev) { struct sci_port *sport = dev_get_drvdata(dev); - if (sport) + if (sport) { + if (uart_console(&sport->port) && !console_suspend_enabled) + device_set_wakeup_path(dev); + uart_suspend_port(&sci_uart_driver, &sport->port); + } return 0; }