From patchwork Thu Sep 10 12:53:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Satya Priya X-Patchwork-Id: 11769481 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AEBB2139F for ; Thu, 10 Sep 2020 21:54:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9FE4D20732 for ; Thu, 10 Sep 2020 21:54:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728571AbgIJVms (ORCPT ); Thu, 10 Sep 2020 17:42:48 -0400 Received: from alexa-out.qualcomm.com ([129.46.98.28]:32804 "EHLO alexa-out.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730553AbgIJMy7 (ORCPT ); Thu, 10 Sep 2020 08:54:59 -0400 Received: from ironmsg07-lv.qualcomm.com (HELO ironmsg07-lv.qulacomm.com) ([10.47.202.151]) by alexa-out.qualcomm.com with ESMTP; 10 Sep 2020 05:54:58 -0700 Received: from ironmsg01-blr.qualcomm.com ([10.86.208.130]) by ironmsg07-lv.qulacomm.com with ESMTP/TLS/AES256-SHA; 10 Sep 2020 05:54:56 -0700 Received: from c-skakit-linux.ap.qualcomm.com (HELO c-skakit-linux.qualcomm.com) ([10.242.51.242]) by ironmsg01-blr.qualcomm.com with ESMTP; 10 Sep 2020 18:24:31 +0530 Received: by c-skakit-linux.qualcomm.com (Postfix, from userid 2344709) id 794584401; Thu, 10 Sep 2020 18:24:30 +0530 (IST) From: satya priya To: Bjorn Andersson Cc: Matthias Kaehlcke , gregkh@linuxfoundation.org, Andy Gross , Rob Herring , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, akashast@codeaurora.org, rojay@codeaurora.org, msavaliy@qti.qualcomm.com, dianders@chromium.org, satya priya Subject: [PATCH V5 3/4] arm64: dts: qcom: sc7180-trogdor: Add pinctrl and interrupt config for BT UART Date: Thu, 10 Sep 2020 18:23:57 +0530 Message-Id: <1599742438-16811-4-git-send-email-skakit@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1599742438-16811-1-git-send-email-skakit@codeaurora.org> References: <1599742438-16811-1-git-send-email-skakit@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add a suitable sleep configuration for uart3 to support Bluetooth wakeup. If QUP function is selected in sleep state, UART RTS/RFR is pulled high during suspend and BT SoC not able to send wakeup bytes. So, configure GPIO mode in sleep state to keep it low during suspend. Signed-off-by: satya priya --- Changes in V5: - Newly added in V5. This patch adds wakeup support for trogdor board files. arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi | 48 ++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi index a6b9beb..96b5331 100644 --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi @@ -792,6 +792,11 @@ ap_spi_fp: &spi10 { #include &uart3 { + pinctrl-names = "default", "sleep"; + pinctrl-1 = <&qup_uart3_sleep>; + interrupts-extended = <&intc GIC_SPI 604 IRQ_TYPE_LEVEL_HIGH>, + <&tlmm 41 IRQ_TYPE_EDGE_FALLING>; + status = "okay"; bluetooth: bluetooth { @@ -1345,4 +1350,47 @@ ap_spi_fp: &spi10 { drive-strength = <2>; }; }; + + qup_uart3_sleep: qup-uart3-sleep { + pinmux { + pins = "gpio38", "gpio39", + "gpio40", "gpio41"; + function = "gpio"; + }; + + pinconf-cts { + /* + * Configure a pull-down on CTS to match the pull of + * the Bluetooth module. + */ + pins = "gpio38"; + bias-pull-down; + }; + + pinconf-rts { + /* + * Configure pull-down on RTS to make sure that the BT SoC can + * wake up the system by sending wakeup bytes during suspend. + */ + pins = "gpio39"; + bias-pull-down; + }; + + pinconf-tx { + /* Configure pull-up on TX when it isn't actively driven */ + pins = "gpio40"; + bias-pull-up; + }; + + pinconf-rx { + /* + * Configure a pull-up on RX. This is needed to avoid + * garbage data when the TX pin of the Bluetooth module is + * in tri-state (module powered off or not driving the + * signal yet). + */ + pins = "gpio41"; + bias-pull-up; + }; + }; };