From patchwork Wed Sep 7 08:02:42 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 603547 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AD956ECAAD3 for ; Wed, 7 Sep 2022 08:03:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229850AbiIGIDb (ORCPT ); Wed, 7 Sep 2022 04:03:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49622 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230246AbiIGIDO (ORCPT ); Wed, 7 Sep 2022 04:03:14 -0400 Received: from muru.com (muru.com [72.249.23.125]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 796F7AA4C1 for ; Wed, 7 Sep 2022 01:02:55 -0700 (PDT) Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id 8D6758162; Wed, 7 Sep 2022 07:55:16 +0000 (UTC) From: Tony Lindgren To: Nishanth Menon , Vignesh Raghavendra Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Keerthy Subject: [PATCH v3 1/2] arm64: dts: ti: k3-am65: Configure pinctrl for timer IO pads Date: Wed, 7 Sep 2022 11:02:42 +0300 Message-Id: <20220907080243.26697-2-tony@atomide.com> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220907080243.26697-1-tony@atomide.com> References: <20220907080243.26697-1-tony@atomide.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Compared to the earlier TI SoCs, am65 has an additional level of dedicated multiplexing registers for the timer IO pads. There are timer IO pads in the MCU domain, and in the MAIN domain. These pads can be muxed for the related timers. There are timer IO control registers for input and output. The registers for CTRLMMR_TIMER*_CTRL and CTRLMMR_MCU_TIMER*_CTRL are used to control the input. The registers for CTCTRLMMR_TIMERIO*_CTRL and CTRLMMR_MCU_TIMERIO*_CTRL the output. The multiplexing is documented in TRM "5.1.2.3.1.4 Timer IO Muxing Control Registers" and "5.1.3.3.1.5 Timer IO Muxing Control Registers", and the CASCADE_EN bit is documented in TRM "12.8.3.1 Timers Overview". For chaining timers, the timer IO control registers also have a CASCADE_EN input bit in the CTRLMMR_TIMER*_CTRL in the registers. The CASCADE_EN bit muxes the previous timer output, or possibly and external TIMER_IO pad source, to the input clock of the selected timer instance for odd numered timers. For the even numbered timers, the CASCADE_EN bit does not do anything. The timer cascade input routing options are shown in TRM "Figure 12-3632. Timers Overview". For handling beyond multiplexing, the driver support for timer cascading should be likely be handled via the clock framework. Cc: Keerthy Cc: Nishanth Menon Cc: Vignesh Raghavendra Signed-off-by: Tony Lindgren --- arch/arm64/boot/dts/ti/k3-am65-main.dtsi | 18 ++++++++++++++++++ arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi | 18 ++++++++++++++++++ 2 files changed, 36 insertions(+) diff --git a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi --- a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi @@ -130,6 +130,24 @@ rng: rng@4e10000 { }; }; + /* TIMERIO pad input CTRLMMR_TIMER*_CTRL registers */ + main_timerio_input: pinctrl@104200 { + compatible = "pinctrl-single"; + reg = <0x0 0x104200 0x0 0x30>; + #pinctrl-cells = <1>; + pinctrl-single,register-width = <32>; + pinctrl-single,function-mask = <0x0000001ff>; + }; + + /* TIMERIO pad output CTCTRLMMR_TIMERIO*_CTRL registers */ + main_timerio_output: pinctrl@104280 { + compatible = "pinctrl-single"; + reg = <0x0 0x104280 0x0 0x20>; + #pinctrl-cells = <1>; + pinctrl-single,register-width = <32>; + pinctrl-single,function-mask = <0x0000000f>; + }; + main_pmx0: pinctrl@11c000 { compatible = "pinctrl-single"; reg = <0x0 0x11c000 0x0 0x2e4>; diff --git a/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi b/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi --- a/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi @@ -20,6 +20,24 @@ phy_gmii_sel: phy@4040 { }; }; + /* MCU_TIMERIO pad input CTRLMMR_MCU_TIMER*_CTRL registers */ + mcu_timerio_input: pinctrl@40f04200 { + compatible = "pinctrl-single"; + reg = <0x0 0x40f04200 0x0 0x10>; + #pinctrl-cells = <1>; + pinctrl-single,register-width = <32>; + pinctrl-single,function-mask = <0x00000101>; + }; + + /* MCU_TIMERIO pad output CTRLMMR_MCU_TIMERIO*_CTRL registers */ + mcu_timerio_output: pinctrl@40f04280 { + compatible = "pinctrl-single"; + reg = <0x0 0x40f04280 0x0 0x8>; + #pinctrl-cells = <1>; + pinctrl-single,register-width = <32>; + pinctrl-single,function-mask = <0x00000003>; + }; + mcu_uart0: serial@40a00000 { compatible = "ti,am654-uart"; reg = <0x00 0x40a00000 0x00 0x100>;