From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alok Chauhan Subject: [PATCH 5/6] tty: serial: qcom_geni_serial: Add interconnect support Date: Tue, 22 Jan 2019 12:03:35 +0530 Message-ID: <1548138816-1149-6-git-send-email-alokc@codeaurora.org> References: <1548138816-1149-1-git-send-email-alokc@codeaurora.org> Return-path: In-Reply-To: <1548138816-1149-1-git-send-email-alokc@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org To: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org, linux-spi@vger.kernel.org, linux-serial@vger.kernel.org, Greg Kroah-Hartman , Jiri Slaby Cc: andy.gross@linaro.org, david.brown@linaro.org, georgi.djakov@linaro.org, dianders@chromium.org, swboyd@chromium.org, bjorn.andersson@linaro.org, Alok Chauhan List-Id: linux-arm-msm@vger.kernel.org Get the interconnect paths for Uart based Serial Engine device and vote accordingly based on maximum supported Uart frequency. Signed-off-by: Alok Chauhan --- drivers/tty/serial/qcom_geni_serial.c | 27 ++++++++++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index a72d6d9..e2ea499 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -19,6 +19,7 @@ #include #include #include +#include /* UART specific GENI registers */ #define SE_UART_LOOPBACK_CFG 0x22c @@ -1348,6 +1349,22 @@ static int qcom_geni_serial_probe(struct platform_device *pdev) return ret; } + /* Set the bus quota to a reasonable value */ + port->se.avg_bw = console ? Bps_to_icc(1000) : Bps_to_icc(2500); + port->se.peak_bw = Bps_to_icc(76800000); + ret = geni_interconnect_init(&port->se); + if (ret) { + dev_err(&pdev->dev, "interconnect_init failed %d\n", ret); + return ret; + } + + /* + * Vote for interconnect path early. This has to move as part of + * Runtime PM APIs when implemented for better control betwen + * console and non-console usecases + */ + geni_icc_update_bw(&port->se, true); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) return -EINVAL; @@ -1385,8 +1402,15 @@ static int __maybe_unused qcom_geni_serial_sys_suspend(struct device *dev) { struct qcom_geni_serial_port *port = dev_get_drvdata(dev); struct uart_port *uport = &port->uport; + int ret; + + ret = uart_suspend_port(uport->private_data, uport); + if (ret) + return ret; + + geni_icc_update_bw(&port->se, false); - return uart_suspend_port(uport->private_data, uport); + return 0; } static int __maybe_unused qcom_geni_serial_sys_resume(struct device *dev) @@ -1394,6 +1418,7 @@ static int __maybe_unused qcom_geni_serial_sys_resume(struct device *dev) struct qcom_geni_serial_port *port = dev_get_drvdata(dev); struct uart_port *uport = &port->uport; + geni_icc_update_bw(&port->se, true); return uart_resume_port(uport->private_data, uport); } -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project