From patchwork Thu Dec 19 16:21:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Dubois-Briand X-Patchwork-Id: 852186 Received: from relay3-d.mail.gandi.net (relay3-d.mail.gandi.net [217.70.183.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 62C0E226551; Thu, 19 Dec 2024 16:21:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.195 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734625321; cv=none; b=ULd1ZQQSczXtc3JZvQQAaiCktDh+sPmJqfcOEIbv2xg4nxWRzelq98JqqE802nI9MG56Pv4nXv/5mLRyWpPAPns92mlt555H8udxfDVzoUs+20ZgAYuhomq7BMXFY7C1Rhlv0eo9vWR94mrWjJH4jvrqpennbsgiccIpPUwQAYk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734625321; c=relaxed/simple; bh=j/ZH98b7v/Dl8/WqhzlTaqw670w2ll3yf24VM/OuYrs=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Cq/mYr6vo15iqCikoKtLqnO1u1rJBJYqY1rn7MnzeoHsCgexlDJXv4MogOLQDFEISIuNY7VAsmh4XMB5BURW7E/u6zQekuXMYncI3e92YQSxfzUWIOYulxPP95dj/NNl/NQSJQy85zEOicfvJr2kwNdY7VQH12kGdUZ4GQYBp9c= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=ZlxOxTOY; arc=none smtp.client-ip=217.70.183.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="ZlxOxTOY" Received: by mail.gandi.net (Postfix) with ESMTPSA id D2B296000A; Thu, 19 Dec 2024 16:21:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1734625311; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=75o1demuGRTQhL28lBh4mm+iaPhJKlrwWjt0l8twc0g=; b=ZlxOxTOYBJ+kW5qF1ZulXGR+GdkMf6iBqgKZxrjeW3NP71CR0QIowqF3EBQLuQrzvdz41R ZjfOpJvLxc9Yut/4z+Uq4yonsD2NizlRBbTBX9lOHBxb5XYiCqVRRSAcjcOqPYZLHKK3cR OI4n7oHea/hpqm3k8ZOr/YNv6Li3fPwzH+cskSGHwdWSEv0feSHKysbCqwIw40/Wt55Qgr PSmjWYMmeose2sC3k4mdY1WBcUTDyAHGEaj2hXoqsyJw9PH9p0/kGR+AsNrSwlEgwnKBty zToqi0lgAuLJ9/uME2t19vCBHlJeTJvutlxU0ts/GzliTQGpdimy+EuXI9ZqSg== From: mathieu.dubois-briand@bootlin.com Date: Thu, 19 Dec 2024 17:21:21 +0100 Subject: [PATCH 4/8] pwm: max7360: Add MAX7360 PWM support Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241219-mdb-max7360-support-v1-4-8e8317584121@bootlin.com> References: <20241219-mdb-max7360-support-v1-0-8e8317584121@bootlin.com> In-Reply-To: <20241219-mdb-max7360-support-v1-0-8e8317584121@bootlin.com> To: Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Kamel Bouhara , Linus Walleij , Bartosz Golaszewski , Dmitry Torokhov , =?utf-8?q?Uwe_Kleine-K=C3=B6n?= =?utf-8?q?ig?= Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-input@vger.kernel.org, linux-pwm@vger.kernel.org, =?utf-8?q?Gr=C3=A9gory_Clement?= , Thomas Petazzoni , Mathieu Dubois-Briand X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1734625307; l=6535; i=mathieu.dubois-briand@bootlin.com; s=20241219; h=from:subject:message-id; bh=5JoN1j4Oackj65AqCNXP+34lE11Fh2kGLi9vl055Ecg=; b=Zbj0Zy9H9aJSPuFT5R3WeTcyln/ZpWn2Z8yyN8UBytSU7vsh4LqFLWN4h0ocIeQrhW2n63lOz 0duXmoXK0kGDLR19nMQlRMnmsSjHs6K2vhwpU+cW06ZhlwljE08gux/ X-Developer-Key: i=mathieu.dubois-briand@bootlin.com; a=ed25519; pk=1PVTmzPXfKvDwcPUzG0aqdGoKZJA3b9s+3DqRlm0Lww= X-GND-Sasl: mathieu.dubois-briand@bootlin.com From: Kamel Bouhara Add driver for Maxim Integrated MAX7360 PWM controller, supporting up to 8 independent PWM outputs. Signed-off-by: Kamel Bouhara Signed-off-by: Mathieu Dubois-Briand --- drivers/pwm/Kconfig | 11 +++ drivers/pwm/Makefile | 1 + drivers/pwm/pwm-max7360.c | 173 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 185 insertions(+) diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig index 0915c1e7df16..399dc3f76e92 100644 --- a/drivers/pwm/Kconfig +++ b/drivers/pwm/Kconfig @@ -745,4 +745,15 @@ config PWM_XILINX To compile this driver as a module, choose M here: the module will be called pwm-xilinx. +config PWM_MAX7360 + tristate "MAX7360 PWMs" + depends on MFD_MAX7360 + depends on OF_GPIO + help + PWM driver for Maxim Integrated MAX7360 multifunction device, with + support for up to 8 PWM outputs. + + To compile this driver as a module, choose M here: the module + will be called pwm-max7360. + endif diff --git a/drivers/pwm/Makefile b/drivers/pwm/Makefile index 9081e0c0e9e0..ae8908ffc892 100644 --- a/drivers/pwm/Makefile +++ b/drivers/pwm/Makefile @@ -36,6 +36,7 @@ obj-$(CONFIG_PWM_LPC32XX) += pwm-lpc32xx.o obj-$(CONFIG_PWM_LPSS) += pwm-lpss.o obj-$(CONFIG_PWM_LPSS_PCI) += pwm-lpss-pci.o obj-$(CONFIG_PWM_LPSS_PLATFORM) += pwm-lpss-platform.o +obj-$(CONFIG_PWM_MAX7360) += pwm-max7360.o obj-$(CONFIG_PWM_MESON) += pwm-meson.o obj-$(CONFIG_PWM_MEDIATEK) += pwm-mediatek.o obj-$(CONFIG_PWM_MICROCHIP_CORE) += pwm-microchip-core.o diff --git a/drivers/pwm/pwm-max7360.c b/drivers/pwm/pwm-max7360.c new file mode 100644 index 000000000000..b1cde3e86864 --- /dev/null +++ b/drivers/pwm/pwm-max7360.c @@ -0,0 +1,173 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2024 Bootlin + * + * Author: Kamel BOUHARA + */ +#include +#include +#include +#include +#include +#include +#include +#include + +#define MAX7360_NUM_PWMS 8 +#define MAX7360_PWM_MAX_RES 256 +#define MAX7360_PWM_PERIOD_NS 2000000 /* 500 Hz */ +#define MAX7360_PWM_COMMON_PWN BIT(5) +#define MAX7360_PWM_CTRL_ENABLE(n) BIT(n) +#define MAX7360_PWM_PORT(n) BIT(n) + +struct max7360_pwm { + struct device *dev; + struct regmap *regmap; +}; + +static inline struct max7360_pwm *to_max7360_pwm(struct pwm_chip *chip) +{ + return pwmchip_get_drvdata(chip); +} + +static int max7360_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm) +{ + struct max7360_pwm *max7360_pwm; + int ret; + + max7360_pwm = to_max7360_pwm(chip); + ret = max7360_port_pin_request(max7360_pwm->dev->parent, pwm->hwpwm, + true); + if (ret) { + dev_err(&chip->dev, "failed to request pwm-%d\n", pwm->hwpwm); + return ret; + } + + ret = regmap_write_bits(max7360_pwm->regmap, + MAX7360_REG_PWMCFG + pwm->hwpwm, + MAX7360_PWM_COMMON_PWN, + 0); + if (ret) { + dev_err(&chip->dev, "failed to write pwm-%d cfg register, error %d\n", + pwm->hwpwm, ret); + return ret; + } + + ret = regmap_write_bits(max7360_pwm->regmap, MAX7360_REG_PORTS, + MAX7360_PWM_PORT(pwm->hwpwm), + MAX7360_PWM_PORT(pwm->hwpwm)); + if (ret) { + dev_err(&chip->dev, "failed to write pwm-%d ports register, error %d\n", + pwm->hwpwm, ret); + return ret; + } + + return 0; +} + +static void max7360_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm) +{ + struct max7360_pwm *max7360_pwm; + int ret; + + max7360_pwm = to_max7360_pwm(chip); + ret = regmap_write_bits(max7360_pwm->regmap, MAX7360_REG_GPIOCTRL, + MAX7360_PWM_CTRL_ENABLE(pwm->hwpwm), + 0); + if (ret) + dev_err(&chip->dev, "failed to enable pwm-%d , error %d\n", + pwm->hwpwm, ret); + + max7360_port_pin_request(max7360_pwm->dev->parent, pwm->hwpwm, + false); +} + +static int max7360_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, + const struct pwm_state *state) +{ + struct max7360_pwm *max7360_pwm; + u64 duty_steps = state->duty_cycle * MAX7360_PWM_MAX_RES; + int ret; + + if (state->polarity != PWM_POLARITY_NORMAL) + return -EINVAL; + + max7360_pwm = to_max7360_pwm(chip); + ret = regmap_write_bits(max7360_pwm->regmap, MAX7360_REG_GPIOCTRL, + MAX7360_PWM_CTRL_ENABLE(pwm->hwpwm), + MAX7360_PWM_CTRL_ENABLE(pwm->hwpwm)); + if (ret) { + dev_err(&chip->dev, "failed to enable pwm-%d , error %d\n", + pwm->hwpwm, ret); + return ret; + } + + do_div(duty_steps, MAX7360_PWM_PERIOD_NS); + + ret = regmap_write(max7360_pwm->regmap, MAX7360_REG_PWMBASE + pwm->hwpwm, + duty_steps >= 255 ? 255 : duty_steps); + if (ret) { + dev_err(&chip->dev, + "failed to apply pwm duty_cycle %llu on pwm-%d, error %d\n", + duty_steps, pwm->hwpwm, ret); + return ret; + } + + return 0; +} + +static const struct pwm_ops max7360_pwm_ops = { + .request = max7360_pwm_request, + .free = max7360_pwm_free, + .apply = max7360_pwm_apply, +}; + +static int max7360_pwm_probe(struct platform_device *pdev) +{ + struct max7360_pwm *max7360_pwm; + struct pwm_chip *chip; + + if (!pdev->dev.parent) { + dev_err(&pdev->dev, "no parent device\n"); + return -ENODEV; + } + + chip = devm_pwmchip_alloc(&pdev->dev, MAX7360_NUM_PWMS, + sizeof(*max7360_pwm)); + if (IS_ERR(chip)) + return PTR_ERR(chip); + chip->ops = &max7360_pwm_ops; + + max7360_pwm = to_max7360_pwm(chip); + max7360_pwm->dev = &pdev->dev; + + max7360_pwm->regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!max7360_pwm->regmap) { + dev_err(&pdev->dev, "could not get parent regmap\n"); + return -ENODEV; + } + + return devm_pwmchip_add(&pdev->dev, chip); +} + +#ifdef CONFIG_OF +static const struct of_device_id max7360_pwm_of_match[] = { + { .compatible = "maxim,max7360-pwm", }, + { } +}; +MODULE_DEVICE_TABLE(of, max7360_pwm_of_match); +#endif + +static struct platform_driver max7360_pwm_driver = { + .driver = { + .name = "max7360-pwm", + .of_match_table = of_match_ptr(max7360_pwm_of_match), + }, + .probe = max7360_pwm_probe, +}; +module_platform_driver(max7360_pwm_driver); + +MODULE_DESCRIPTION("MAX7360 PWM driver"); +MODULE_AUTHOR("Kamel BOUHARA "); +MODULE_ALIAS("platform:max7360-pwm"); +MODULE_LICENSE("GPL");