From patchwork Fri Nov 4 08:01:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 13031502 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B5858C433FE for ; Fri, 4 Nov 2022 08:03:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=J9FaQyVaIId/QezWX12WgZ0vAweesKsrey3mIpV7OGw=; b=rxYxoPqlRFJ7hC zoIgHdQxacf6sbI5A3mDqqmxBeSlKNxyrtgxsoXPQmO8fAAJu0j35LgnEoV49Itf3K6f0gc7NOvXg oCQ7OaIJHExzCyIjuPSnVB7LAT6UWcw+5RCTx7kZZcBkprNlO0We2U5mAfpFXBWpr8TCZCFXCnzkc S0whyvXVstG2Xf+OrBetyAGZzTLZAQH6mSB7sZnsV4CKks7VNqZydYKPxhawwx9K20xJLtC/hxLqF +GpX07bh5UYh/dIQVcH9YUxpVV9zL5TGgIUhhJJNfyc4dRY5BtmVU7mixyiN+ISC+FyL15LuJsNWS A3xbpzoUyDTiiz0Oaiow==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oqreQ-002qi7-My; Fri, 04 Nov 2022 08:02:06 +0000 Received: from muru.com ([72.249.23.125]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oqre3-002qca-Px for linux-arm-kernel@lists.infradead.org; Fri, 04 Nov 2022 08:01:45 +0000 Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id 7D34B821D; Fri, 4 Nov 2022 07:52:05 +0000 (UTC) From: Tony Lindgren To: Nishanth Menon , Vignesh Raghavendra Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Keerthy , Georgi Vlaev Subject: [PATCH 4/4] arm64: dts: ti: k3-am625-sk: Use pwm-led instead of gpio-led Date: Fri, 4 Nov 2022 10:01:22 +0200 Message-Id: <20221104080122.49220-5-tony@atomide.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221104080122.49220-1-tony@atomide.com> References: <20221104080122.49220-1-tony@atomide.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221104_010143_962243_227EA56C X-CRM114-Status: GOOD ( 11.03 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On am625, pad c17 can be used either in gpio mode or pwm mode to control the connected led. Let's change to use pwm-led for additional brighness control. The pwm controller is dmtimer7 for pad C17. We configure it for 128 Hz rate (1000000000 / 7812500) similar to what has been done elsewhere for pwm-leds. Cc: Keerthy Cc: Nishanth Menon Cc: Vignesh Raghavendra Tested-by: Georgi Vlaev Signed-off-by: Tony Lindgren --- arch/arm64/boot/dts/ti/k3-am625-sk.dts | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/arch/arm64/boot/dts/ti/k3-am625-sk.dts b/arch/arm64/boot/dts/ti/k3-am625-sk.dts --- a/arch/arm64/boot/dts/ti/k3-am625-sk.dts +++ b/arch/arm64/boot/dts/ti/k3-am625-sk.dts @@ -131,18 +131,25 @@ vdd_sd_dv: regulator-4 { }; leds { - compatible = "gpio-leds"; - pinctrl-names = "default"; - pinctrl-0 = <&usr_led_pins_default>; + compatible = "pwm-leds"; led-0 { label = "am62-sk:green:heartbeat"; - gpios = <&main_gpio1 49 GPIO_ACTIVE_HIGH>; + pwms = <&main_pwm7 0 7812500 0>; + max-brightness = <255>; linux,default-trigger = "heartbeat"; function = LED_FUNCTION_HEARTBEAT; default-state = "off"; }; }; + + main_pwm7: dmtimer-main-pwm-7 { + pinctrl-0 = <&usr_led_pins_default>; + pinctrl-names = "default"; + compatible = "ti,omap-dmtimer-pwm"; + #pwm-cells = <3>; + ti,timers = <&main_timer7>; + }; }; &main_pmx0 { @@ -203,7 +210,7 @@ AM62X_IOPAD(0x240, PIN_INPUT, 0) /* (D17) MMC1_SDCD */ usr_led_pins_default: usr-led-pins-default { pinctrl-single,pins = < - AM62X_IOPAD(0x244, PIN_OUTPUT, 7) /* (C17) MMC1_SDWP.GPIO1_49 */ + AM62X_IOPAD(0x244, PIN_OUTPUT, 2) /* (C17) MMC1_SDWP.TIMER_IO7 */ >; };