From patchwork Mon Sep 14 13:58:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Satya Priya X-Patchwork-Id: 11773821 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 61315159A for ; Mon, 14 Sep 2020 14:05:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 520B42074B for ; Mon, 14 Sep 2020 14:05:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726827AbgINOFU (ORCPT ); Mon, 14 Sep 2020 10:05:20 -0400 Received: from alexa-out.qualcomm.com ([129.46.98.28]:31994 "EHLO alexa-out.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726328AbgINOAq (ORCPT ); Mon, 14 Sep 2020 10:00:46 -0400 Received: from ironmsg07-lv.qualcomm.com (HELO ironmsg07-lv.qulacomm.com) ([10.47.202.151]) by alexa-out.qualcomm.com with ESMTP; 14 Sep 2020 06:59:27 -0700 Received: from ironmsg02-blr.qualcomm.com ([10.86.208.131]) by ironmsg07-lv.qulacomm.com with ESMTP/TLS/AES256-SHA; 14 Sep 2020 06:59:26 -0700 Received: from c-skakit-linux.ap.qualcomm.com (HELO c-skakit-linux.qualcomm.com) ([10.242.51.242]) by ironmsg02-blr.qualcomm.com with ESMTP; 14 Sep 2020 19:28:55 +0530 Received: by c-skakit-linux.qualcomm.com (Postfix, from userid 2344709) id 2EAD144D9; Mon, 14 Sep 2020 19:28:54 +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 V6 3/4] arm64: dts: qcom: sc7180-trogdor: Add wakeup support for BT UART Date: Mon, 14 Sep 2020 19:28:36 +0530 Message-Id: <1600091917-7464-4-git-send-email-skakit@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1600091917-7464-1-git-send-email-skakit@codeaurora.org> References: <1600091917-7464-1-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 the necessary pinctrl, interrupt property and a suitable sleep config to support Bluetooth wakeup feature. GPIO mode is configured in sleep state to drive the RTS/RFR line low. 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. Signed-off-by: satya priya Reviewed-by: Matthias Kaehlcke Tested-by: Matthias Kaehlcke Reviewed-by: Douglas Anderson --- Changes in V5: - Newly added in V5. This patch adds wakeup support for trogdor board files. Changes in V6: - As per Doug's comment deleted interrupts property and sorted the qup sleep state before trackpad. - As per Bjorn's comment canged the commit text, rationale for RTS, TX, RX. arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi | 54 ++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi index a6b9beb..6629df9 100644 --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi @@ -794,6 +794,13 @@ ap_spi_fp: &spi10 { &uart3 { status = "okay"; + /delete-property/interrupts; + interrupts-extended = <&intc GIC_SPI 604 IRQ_TYPE_LEVEL_HIGH>, + <&tlmm 41 IRQ_TYPE_EDGE_FALLING>; + + pinctrl-names = "default", "sleep"; + pinctrl-1 = <&qup_uart3_sleep>; + bluetooth: bluetooth { compatible = "qcom,wcn3991-bt"; vddio-supply = <&pp1800_l10a>; @@ -1307,6 +1314,53 @@ ap_spi_fp: &spi10 { }; }; + 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. As RTS is active low + * signal, pull it low to indicate the BT SoC that it + * can wakeup the system anytime from suspend state by + * pulling RX low (by sending wakeup bytes). + */ + pins = "gpio39"; + bias-pull-down; + }; + + pinconf-tx { + /* + * Configure pull-up on TX when it isn't actively driven + * to prevent BT SoC from receiving garbage during sleep. + */ + 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 floating which may cause spurious wakeups. + */ + pins = "gpio41"; + bias-pull-up; + }; + }; + trackpad_int_1v8_odl: trackpad-int-1v8-odl { pinmux { pins = "gpio58";