From patchwork Mon Nov 21 17:42:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sasha Finkelstein X-Patchwork-Id: 627368 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 DDDBBC433FE for ; Mon, 21 Nov 2022 17:45:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230072AbiKURpM (ORCPT ); Mon, 21 Nov 2022 12:45:12 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36380 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230081AbiKURpH (ORCPT ); Mon, 21 Nov 2022 12:45:07 -0500 Received: from mail-ej1-x636.google.com (mail-ej1-x636.google.com [IPv6:2a00:1450:4864:20::636]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4B1DB41984; Mon, 21 Nov 2022 09:45:05 -0800 (PST) Received: by mail-ej1-x636.google.com with SMTP id vv4so20981090ejc.2; Mon, 21 Nov 2022 09:45:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=vc7s+j1I+v53zIS5PmltGaeTsanNeN5sDlFmwluvB4c=; b=ZW7YE20LBYtuKZLnhkZfVvIw0tdu4LjJ5muSHbTVqkWxOEaxDM8Po2OsAitkQgNX4N DCQRE1JY+E0OJ37N4H9hVjdHD4ey3PtMr/N9mT0uvoeDPkHFvMLu7XoAjx39++8TIXGe LK9WRn/LtxTMMLGBkR3t/ncaXH2UKpHENGAq6UDo6tZvxwbMLdBeA0hrnJKtHK7UkSWU icXlOnv+MYkFR33qMD0ZdcITLgMeWLPvkmKyatSwhzYY59G0hkl3kAVr/V7l07tAr8Iw qiN1gLFQIU13b/NL+NTJu4EM+IkkbKff7UkcxX/7o5AA/P75Pm+F1Y8bD9s1WDXD65SZ IEBg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=vc7s+j1I+v53zIS5PmltGaeTsanNeN5sDlFmwluvB4c=; b=BnqXbpZlwsBDSoDLfV/zlPlYKf/GEKd85rztUgdKlW4kER+Hi+iC/QGSiGoW+6PqWa HdeYhkX4gIIrL8jvWu7KAwSN5EuuFyJDMrCkrb4TPajE0+kCpRObgmVCQtsqhlNTkz1b /lZhLBx+O4vxfrEN0ZAq8zEWk/x6LB2ue7n289ZkSH66g8zNwcbUyOHosF7rbxDTJp7q XyaUHGkG6sOuv4SJjsOU8FDEwY2LxYLmYtZQ4hky0fSYXu2LoFA+qWIHTLXcUFzd6Crb StRBFK4rtIOuI1Odr1oa65mQxiWQRWTqQhzxgyGkZaj/tEBWqPKBgEvmp8DA9AKYbvtC i/jg== X-Gm-Message-State: ANoB5plAQ3bS0mb9wEJFvTQ3Mvka6p67M2I5mxd/KDU4pp5f1ZywuD0K 5xZcRZ+C1oZzQplsZq5M8lw= X-Google-Smtp-Source: AA0mqf7lXxnZYpevpsV858rlXSzg0QPJ3/LuKa1iCQAHnmOwNX3SpRCzIWR+qkYbpC56H0BsZIHzcQ== X-Received: by 2002:a17:907:3ac2:b0:7b7:c1e7:eb54 with SMTP id fi2-20020a1709073ac200b007b7c1e7eb54mr353463ejc.393.1669052703924; Mon, 21 Nov 2022 09:45:03 -0800 (PST) Received: from localhost ([217.131.81.52]) by smtp.gmail.com with UTF8SMTPSA id x19-20020aa7cd93000000b00467f643585fsm5404201edv.64.2022.11.21.09.45.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 21 Nov 2022 09:45:03 -0800 (PST) From: Sasha Finkelstein To: thierry.reding@gmail.com, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org Cc: marcan@marcan.st, sven@svenpeter.dev, alyssa@rosenzweig.io, asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-pwm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Sasha Finkelstein , Krzysztof Kozlowski Subject: [PATCH RESEND v3 1/4] dt-bindings: pwm: Add Apple PWM controller Date: Mon, 21 Nov 2022 20:42:25 +0300 Message-Id: <20221121174228.93670-2-fnkl.kernel@gmail.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221121174228.93670-1-fnkl.kernel@gmail.com> References: <20221121174228.93670-1-fnkl.kernel@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Apple SoCs such as the M1 contain a PWM controller used among other things to control the keyboard backlight. Signed-off-by: Sasha Finkelstein Reviewed-by: Krzysztof Kozlowski Acked-by: Sven Peter --- .../bindings/pwm/apple,s5l-fpwm.yaml | 51 +++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 Documentation/devicetree/bindings/pwm/apple,s5l-fpwm.yaml diff --git a/Documentation/devicetree/bindings/pwm/apple,s5l-fpwm.yaml b/Documentation/devicetree/bindings/pwm/apple,s5l-fpwm.yaml new file mode 100644 index 000000000000..142157bff0cd --- /dev/null +++ b/Documentation/devicetree/bindings/pwm/apple,s5l-fpwm.yaml @@ -0,0 +1,51 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/pwm/apple,s5l-fpwm.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Apple FPWM controller + +maintainers: + - asahi@lists.linux.dev + - Sasha Finkelstein + +description: PWM controller used for keyboard backlight on ARM Macs + +properties: + compatible: + items: + - enum: + - apple,t8103-fpwm + - apple,t6000-fpwm + - apple,t8112-fpwm + - const: apple,s5l-fpwm + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + power-domains: + maxItems: 1 + + "#pwm-cells": + const: 2 + +required: + - compatible + - reg + - clocks + +additionalProperties: false + +examples: + - | + pwm@235044000 { + compatible = "apple,t8103-fpwm", "apple,s5l-fpwm"; + reg = <0x35044000 0x4000>; + power-domains = <&ps_fpwm1>; + clocks = <&clkref>; + #pwm-cells = <2>; + }; From patchwork Mon Nov 21 17:42:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sasha Finkelstein X-Patchwork-Id: 627673 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 78930C43219 for ; Mon, 21 Nov 2022 17:45:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229813AbiKURpR (ORCPT ); Mon, 21 Nov 2022 12:45:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36378 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230139AbiKURpL (ORCPT ); Mon, 21 Nov 2022 12:45:11 -0500 Received: from mail-ej1-x636.google.com (mail-ej1-x636.google.com [IPv6:2a00:1450:4864:20::636]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8685D5B87E; 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Signed-off-by: Sasha Finkelstein Acked-by: Sven Peter --- drivers/pwm/Kconfig | 12 ++++ drivers/pwm/Makefile | 1 + drivers/pwm/pwm-apple.c | 127 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 140 insertions(+) create mode 100644 drivers/pwm/pwm-apple.c diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig index 60d13a949bc5..c3be11468414 100644 --- a/drivers/pwm/Kconfig +++ b/drivers/pwm/Kconfig @@ -51,6 +51,18 @@ config PWM_AB8500 To compile this driver as a module, choose M here: the module will be called pwm-ab8500. +config PWM_APPLE + tristate "Apple SoC PWM support" + depends on ARCH_APPLE || COMPILE_TEST + help + Generic PWM framework driver for PWM controller present on + Apple SoCs + + Say Y here if you have an ARM Apple laptop, otherwise say N + + To compile this driver as a module, choose M here: the module + will be called pwm-apple. + config PWM_ATMEL tristate "Atmel PWM support" depends on ARCH_AT91 || COMPILE_TEST diff --git a/drivers/pwm/Makefile b/drivers/pwm/Makefile index 7bf1a29f02b8..19899b912e00 100644 --- a/drivers/pwm/Makefile +++ b/drivers/pwm/Makefile @@ -2,6 +2,7 @@ obj-$(CONFIG_PWM) += core.o obj-$(CONFIG_PWM_SYSFS) += sysfs.o obj-$(CONFIG_PWM_AB8500) += pwm-ab8500.o +obj-$(CONFIG_PWM_APPLE) += pwm-apple.o obj-$(CONFIG_PWM_ATMEL) += pwm-atmel.o obj-$(CONFIG_PWM_ATMEL_HLCDC_PWM) += pwm-atmel-hlcdc.o obj-$(CONFIG_PWM_ATMEL_TCB) += pwm-atmel-tcb.o diff --git a/drivers/pwm/pwm-apple.c b/drivers/pwm/pwm-apple.c new file mode 100644 index 000000000000..b0c3f86fd578 --- /dev/null +++ b/drivers/pwm/pwm-apple.c @@ -0,0 +1,127 @@ +// SPDX-License-Identifier: GPL-2.0 OR MIT +/* + * Driver for the Apple SoC PWM controller + * + * Copyright The Asahi Linux Contributors + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define PWM_CONTROL 0x00 +#define PWM_ON_CYCLES 0x1c +#define PWM_OFF_CYCLES 0x18 + +#define CTRL_ENABLE BIT(0) +#define CTRL_MODE BIT(2) +#define CTRL_UPDATE BIT(5) +#define CTRL_TRIGGER BIT(9) +#define CTRL_INVERT BIT(10) +#define CTRL_OUTPUT_ENABLE BIT(14) + +struct apple_pwm { + struct pwm_chip chip; + void __iomem *base; + u64 clkrate; +}; + +static int apple_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, + const struct pwm_state *state) +{ + struct apple_pwm *fpwm; + u64 on_cycles, off_cycles; + + fpwm = container_of(chip, struct apple_pwm, chip); + if (state->enabled) { + on_cycles = mul_u64_u64_div_u64(fpwm->clkrate, + state->duty_cycle, NSEC_PER_SEC); + off_cycles = mul_u64_u64_div_u64(fpwm->clkrate, + state->period, NSEC_PER_SEC) - on_cycles; + writel(on_cycles, fpwm->base + PWM_ON_CYCLES); + writel(off_cycles, fpwm->base + PWM_OFF_CYCLES); + writel(CTRL_ENABLE | CTRL_OUTPUT_ENABLE | CTRL_UPDATE, + fpwm->base + PWM_CONTROL); + } else { + writel(0, fpwm->base + PWM_CONTROL); + } + return 0; +} + +static void apple_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm, + struct pwm_state *state) +{ + struct apple_pwm *fpwm; + u32 on_cycles, off_cycles, ctrl; + + fpwm = container_of(chip, struct apple_pwm, chip); + + ctrl = readl(fpwm->base + PWM_CONTROL); + on_cycles = readl(fpwm->base + PWM_ON_CYCLES); + off_cycles = readl(fpwm->base + PWM_OFF_CYCLES); + + state->enabled = (ctrl & CTRL_ENABLE) && (ctrl & CTRL_OUTPUT_ENABLE); + state->polarity = PWM_POLARITY_NORMAL; + state->duty_cycle = div_u64(on_cycles, fpwm->clkrate) * NSEC_PER_SEC; + state->period = div_u64(off_cycles + on_cycles, fpwm->clkrate) * NSEC_PER_SEC; +} + +static const struct pwm_ops apple_pwm_ops = { + .apply = apple_pwm_apply, + .get_state = apple_pwm_get_state, + .owner = THIS_MODULE, +}; + +static int apple_pwm_probe(struct platform_device *pdev) +{ + struct apple_pwm *pwm; + struct clk *clk; + int ret; + + pwm = devm_kzalloc(&pdev->dev, sizeof(*pwm), GFP_KERNEL); + if (!pwm) + return -ENOMEM; + + pwm->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(pwm->base)) + return PTR_ERR(pwm->base); + + platform_set_drvdata(pdev, pwm); + + clk = devm_clk_get_enabled(&pdev->dev, NULL); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + pwm->clkrate = clk_get_rate(clk); + pwm->chip.dev = &pdev->dev; + pwm->chip.npwm = 1; + pwm->chip.ops = &apple_pwm_ops; + + ret = devm_pwmchip_add(&pdev->dev, &pwm->chip); + return ret; +} + +static const struct of_device_id apple_pwm_of_match[] = { + { .compatible = "apple,s5l-fpwm" }, + {} +}; +MODULE_DEVICE_TABLE(of, apple_pwm_of_match); + +static struct platform_driver apple_pwm_driver = { + .probe = apple_pwm_probe, + .driver = { + .name = "apple-pwm", + .owner = THIS_MODULE, + .of_match_table = apple_pwm_of_match, + }, +}; +module_platform_driver(apple_pwm_driver); + +MODULE_DESCRIPTION("Apple SoC PWM driver"); +MODULE_LICENSE("Dual MIT/GPL"); From patchwork Mon Nov 21 17:42:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sasha Finkelstein X-Patchwork-Id: 627672 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 5EAE7C43219 for ; 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Mon, 21 Nov 2022 09:45:13 -0800 (PST) From: Sasha Finkelstein To: thierry.reding@gmail.com, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org Cc: marcan@marcan.st, sven@svenpeter.dev, alyssa@rosenzweig.io, asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-pwm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Sasha Finkelstein Subject: [PATCH RESEND v3 3/4] arm64: dts: apple: t8103: Add PWM controller Date: Mon, 21 Nov 2022 20:42:27 +0300 Message-Id: <20221121174228.93670-4-fnkl.kernel@gmail.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221121174228.93670-1-fnkl.kernel@gmail.com> References: <20221121174228.93670-1-fnkl.kernel@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Adds PWM controller and keyboard backlight bindings for M1 MacBooks Signed-off-by: Sasha Finkelstein Acked-by: Sven Peter --- arch/arm64/boot/dts/apple/t8103-j293.dts | 20 ++++++++++++++++++++ arch/arm64/boot/dts/apple/t8103-j313.dts | 20 ++++++++++++++++++++ arch/arm64/boot/dts/apple/t8103.dtsi | 9 +++++++++ 3 files changed, 49 insertions(+) diff --git a/arch/arm64/boot/dts/apple/t8103-j293.dts b/arch/arm64/boot/dts/apple/t8103-j293.dts index ecb10d237a05..0b4b7e8e0726 100644 --- a/arch/arm64/boot/dts/apple/t8103-j293.dts +++ b/arch/arm64/boot/dts/apple/t8103-j293.dts @@ -11,6 +11,7 @@ #include "t8103.dtsi" #include "t8103-jxxx.dtsi" +#include / { compatible = "apple,j293", "apple,t8103", "apple,arm-platform"; @@ -43,3 +44,22 @@ &i2c2 { &i2c4 { status = "okay"; }; + +/ { + led-controller { + compatible = "pwm-leds"; + led-0 { + pwms = <&fpwm1 0 40000>; + pwm-names = "kbd-backlight"; + label = "kbd_backlight"; + function = LED_FUNCTION_KBD_BACKLIGHT; + color = ; + max-brightness = <255>; + default-state = "keep"; + }; + }; +}; + +&fpwm1 { + status = "okay"; +}; diff --git a/arch/arm64/boot/dts/apple/t8103-j313.dts b/arch/arm64/boot/dts/apple/t8103-j313.dts index df741737b8e6..0e0f57dee96b 100644 --- a/arch/arm64/boot/dts/apple/t8103-j313.dts +++ b/arch/arm64/boot/dts/apple/t8103-j313.dts @@ -11,6 +11,7 @@ #include "t8103.dtsi" #include "t8103-jxxx.dtsi" +#include / { compatible = "apple,j313", "apple,t8103", "apple,arm-platform"; @@ -35,3 +36,22 @@ &pcie0_dart_2 { /delete-node/ &port01; /delete-node/ &port02; + +/ { + led-controller { + compatible = "pwm-leds"; + led-0 { + pwms = <&fpwm1 0 40000>; + pwm-names = "kbd-backlight"; + label = "kbd_backlight"; + function = LED_FUNCTION_KBD_BACKLIGHT; + color = ; + max-brightness = <255>; + default-state = "keep"; + }; + }; +}; + +&fpwm1 { + status = "okay"; +}; diff --git a/arch/arm64/boot/dts/apple/t8103.dtsi b/arch/arm64/boot/dts/apple/t8103.dtsi index 51a63b29d404..ccdb26ef6b22 100644 --- a/arch/arm64/boot/dts/apple/t8103.dtsi +++ b/arch/arm64/boot/dts/apple/t8103.dtsi @@ -191,6 +191,15 @@ i2c4: i2c@235020000 { status = "disabled"; /* only used in J293 */ }; + fpwm1: pwm@235044000 { + compatible = "apple,t8103-fpwm", "apple,s5l-fpwm"; + reg = <0x2 0x35044000 0x0 0x4000>; + power-domains = <&ps_fpwm1>; + clocks = <&clkref>; + #pwm-cells = <2>; + status = "disabled"; + }; + serial0: serial@235200000 { compatible = "apple,s5l-uart"; reg = <0x2 0x35200000 0x0 0x1000>; From patchwork Mon Nov 21 17:42:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sasha Finkelstein X-Patchwork-Id: 627367 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 65AEEC433FE for ; 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Mon, 21 Nov 2022 09:45:17 -0800 (PST) From: Sasha Finkelstein To: thierry.reding@gmail.com, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org Cc: marcan@marcan.st, sven@svenpeter.dev, alyssa@rosenzweig.io, asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-pwm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Sasha Finkelstein Subject: [PATCH RESEND v3 4/4] MAINTAINERS: Add entries for Apple PWM driver Date: Mon, 21 Nov 2022 20:42:28 +0300 Message-Id: <20221121174228.93670-5-fnkl.kernel@gmail.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221121174228.93670-1-fnkl.kernel@gmail.com> References: <20221121174228.93670-1-fnkl.kernel@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add the MAINTAINERS entries for the driver Signed-off-by: Sasha Finkelstein Acked-by: Sven Peter --- MAINTAINERS | 2 ++ 1 file changed, 2 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 046ff06ff97f..69f56f7cf907 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1908,6 +1908,7 @@ F: Documentation/devicetree/bindings/nvmem/apple,efuses.yaml F: Documentation/devicetree/bindings/pci/apple,pcie.yaml F: Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml F: Documentation/devicetree/bindings/power/apple* +F: Documentation/devicetree/bindings/pwm/pwm-apple.yaml F: Documentation/devicetree/bindings/watchdog/apple,wdt.yaml F: arch/arm64/boot/dts/apple/ F: drivers/clk/clk-apple-nco.c @@ -1921,6 +1922,7 @@ F: drivers/mailbox/apple-mailbox.c F: drivers/nvme/host/apple.c F: drivers/nvmem/apple-efuses.c F: drivers/pinctrl/pinctrl-apple-gpio.c +F: drivers/pwm/pwm-apple.c F: drivers/soc/apple/* F: drivers/watchdog/apple_wdt.c F: include/dt-bindings/interrupt-controller/apple-aic.h