From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6557CC142 for ; Mon, 4 Sep 2023 18:35:00 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DC980C433C8; Mon, 4 Sep 2023 18:34:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1693852500; bh=uOl8bCqQp8PKjdS9X2+5MsGUoeyiQSqC5HOShuKtQsQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0ZTvOdbA+Kqaofa3aC0EfK62LMn+uFbJ8py7z2PEMi0U4TWqKwn/MTGxRBvoXUGO1 Y/GRKFWXVrr9kDiEEWknozvpmYQd7iM09s70VledrtzRn/Ib5NGWXMmVILfy8Ff3PE gdfnz8CHgdqEf4Ot3wYAWt2Kg8RQrhWJJxet4QVQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Rajendra Nayak , Matthias Kaehlcke , Johan Hovold , Konrad Dybcio Subject: [PATCH 6.1 21/31] serial: qcom-geni: fix opp vote on shutdown Date: Mon, 4 Sep 2023 19:30:29 +0100 Message-ID: <20230904182948.052674627@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230904182946.999390199@linuxfoundation.org> References: <20230904182946.999390199@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Johan Hovold commit 8ece7b754bc34ffd7fcc8269ccb9128e72ca76d8 upstream. The operating-performance-point vote needs to be dropped when shutting down the port to avoid wasting power by keeping resources like power domains in an unnecessarily high performance state (e.g. when a UART connected Bluetooth controller is not in use). Fixes: a5819b548af0 ("tty: serial: qcom_geni_serial: Use OPP API to set clk/perf state") Cc: stable@vger.kernel.org # 5.9 Cc: Rajendra Nayak Cc: Matthias Kaehlcke Signed-off-by: Johan Hovold Acked-by: Konrad Dybcio Link: https://lore.kernel.org/r/20230714130214.14552-2-johan+linaro@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/qcom_geni_serial.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -129,6 +129,7 @@ struct qcom_geni_serial_port { u32 tx_fifo_width; u32 rx_fifo_depth; bool setup; + unsigned long clk_rate; int (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop); unsigned int baud; void *rx_fifo; @@ -1061,6 +1062,7 @@ static void qcom_geni_serial_set_termios baud * sampling_rate, clk_rate, clk_div); uport->uartclk = clk_rate; + port->clk_rate = clk_rate; dev_pm_opp_set_rate(uport->dev, clk_rate); ser_clk_cfg = SER_CLK_EN; ser_clk_cfg |= clk_div << CLK_DIV_SHFT; @@ -1330,10 +1332,13 @@ static void qcom_geni_serial_pm(struct u if (new_state == UART_PM_STATE_ON && old_state == UART_PM_STATE_OFF) { geni_icc_enable(&port->se); + if (port->clk_rate) + dev_pm_opp_set_rate(uport->dev, port->clk_rate); geni_se_resources_on(&port->se); } else if (new_state == UART_PM_STATE_OFF && old_state == UART_PM_STATE_ON) { geni_se_resources_off(&port->se); + dev_pm_opp_set_rate(uport->dev, 0); geni_icc_disable(&port->se); } }