From patchwork Fri Mar 10 07:45:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: William Qiu X-Patchwork-Id: 67260 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:5915:0:0:0:0:0 with SMTP id v21csp742870wrd; Fri, 10 Mar 2023 00:06:22 -0800 (PST) X-Google-Smtp-Source: AK7set+R67B2cvybCWOn28Z5hB+xRPcwxH0TgNBM+33Uer7J8DH10L/SR5v6aohUsOEQSfo/cNzK X-Received: by 2002:a17:902:bb81:b0:19d:164e:5560 with SMTP id m1-20020a170902bb8100b0019d164e5560mr20982607pls.22.1678435582122; Fri, 10 Mar 2023 00:06:22 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1678435582; cv=none; d=google.com; s=arc-20160816; b=ESU1vMRpc7svTQ+8oVe+eOJd99EFD3S7IRJpHh1QSf8IYiiMSMq3LAGTpFQ1LBNnln YN0yLSajX/fd8LYo4IxftA7i4/0U/+bCNvAl726eUFcdR5OrqfjO3zF2e1CwmI+UleKi 7UjBd7wQ9VDnJZBkYcN/bfB7Kw6kTEgh6VXhGAzXEdgagzgRRrkn2NMYQZ7db9CJDtBf ppRtie1b3nfMjt7nRcv9k5V5dRGc6IhN+H/AIyoHZ1EtVIjhXVUAXs3wzhwMUGxdm5HL Jl6U6q43cyUG57YHfVe/jp36ncis8Z/Omic5BSug4rgVTsFayaxS8zm93+wtTQN2S/yJ EfcQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=iH0BpB0fqDLZrKJyKaJ52Q1NcFYiIQYkXdzCXUwa4Bc=; b=tiM8Rt9/91AeWAYRH4Dp4E1Spc1bhjFmq2uat/ch8b3S5vQnnH/KKDAsKbm6s47/WJ Hau04xeaSG8m5kzhjnW3XyLIzEu8VicCUKH3lW6UX+L17IesrygGvEbEA4NyTTe8UO0W h3vw/b38H5Fdz+MS3+hEsuaVA4F1cHB9PsR0sQrAJvRxsfDCi1nB3TFD0d4F7Aiyg3jk jZMih7dCiPSghQHpCSOZ45yYPP08W/sxsXabfmjXNip00BiTAo6HcGdLvDh1Xq4EkrI+ CnuId30747wPcfByPaN2U71fSINczNHg0Q8vcfMJDMBFv/vWYnRJEq/eoD1IbVyWvcgf lNSA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id u12-20020a170902e80c00b0019acc520cf5si1741613plg.389.2023.03.10.00.06.06; Fri, 10 Mar 2023 00:06:22 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229645AbjCJHqU convert rfc822-to-8bit (ORCPT + 99 others); Fri, 10 Mar 2023 02:46:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46054 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229843AbjCJHqD (ORCPT ); Fri, 10 Mar 2023 02:46:03 -0500 Received: from fd01.gateway.ufhost.com (fd01.gateway.ufhost.com [61.152.239.71]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2882E38010; Thu, 9 Mar 2023 23:45:07 -0800 (PST) Received: from EXMBX165.cuchost.com (unknown [175.102.18.54]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "EXMBX165", Issuer "EXMBX165" (not verified)) by fd01.gateway.ufhost.com (Postfix) with ESMTP id A37EB24E17F; Fri, 10 Mar 2023 15:45:05 +0800 (CST) Received: from EXMBX068.cuchost.com (172.16.6.68) by EXMBX165.cuchost.com (172.16.6.75) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Fri, 10 Mar 2023 15:45:05 +0800 Received: from williamqiu-virtual-machine.starfivetech.com (171.223.208.138) by EXMBX068.cuchost.com (172.16.6.68) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Fri, 10 Mar 2023 15:45:04 +0800 From: William Qiu To: , , CC: Rob Herring , Krzysztof Kozlowski , Philipp Zabel , Thierry Reding , William Qiu , Hal Feng Subject: [PATCH v2 1/2] dt-bindings: PWM: Add StarFive PWM module Date: Fri, 10 Mar 2023 15:45:02 +0800 Message-ID: <20230310074503.155131-2-william.qiu@starfivetech.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230310074503.155131-1-william.qiu@starfivetech.com> References: <20230310074503.155131-1-william.qiu@starfivetech.com> MIME-Version: 1.0 X-Originating-IP: [171.223.208.138] X-ClientProxiedBy: EXCAS066.cuchost.com (172.16.6.26) To EXMBX068.cuchost.com (172.16.6.68) X-YovoleRuleAgent: yovoleflag X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RCVD_IN_MSPIKE_H2, SPF_HELO_PASS,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1759967268946820185?= X-GMAIL-MSGID: =?utf-8?q?1759967268946820185?= Add documentation to describe StarFive Pulse Width Modulation controller driver. Signed-off-by: William Qiu Reviewed-by: Krzysztof Kozlowski --- .../bindings/pwm/starfive,jh7110-pwm.yaml | 53 +++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 Documentation/devicetree/bindings/pwm/starfive,jh7110-pwm.yaml diff --git a/Documentation/devicetree/bindings/pwm/starfive,jh7110-pwm.yaml b/Documentation/devicetree/bindings/pwm/starfive,jh7110-pwm.yaml new file mode 100644 index 000000000000..b66aa4b6eca8 --- /dev/null +++ b/Documentation/devicetree/bindings/pwm/starfive,jh7110-pwm.yaml @@ -0,0 +1,53 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/pwm/starfive,jh7110-pwm.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: StarFive PWM controller + +maintainers: + - William Qiu + +description: + StarFive SoCs contain PWM and when operating in PWM mode, the PTC core generates + binary signal with user-programmable low and high periods. Clock source for the + PWM can be either system clockor external clock. Each PWM timer block provides 8 + PWM channels. + +allOf: + - $ref: pwm.yaml# + +properties: + compatible: + const: starfive,jh7110-pwm + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + resets: + maxItems: 1 + + "#pwm-cells": + const: 3 + +required: + - compatible + - reg + - clocks + - resets + +additionalProperties: false + +examples: + - | + pwm@120d0000 { + compatible = "starfive,jh7110-pwm"; + reg = <0x120d0000 0x10000>; + clocks = <&syscrg 121>; + resets = <&syscrg 108>; + #pwm-cells=<3>; + }; From patchwork Fri Mar 10 07:45:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: William Qiu X-Patchwork-Id: 67255 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:5915:0:0:0:0:0 with SMTP id v21csp738036wrd; Thu, 9 Mar 2023 23:52:18 -0800 (PST) X-Google-Smtp-Source: AK7set8iSdEiGNrGUWcykXtzcYtku5gJaUa8nbZMZz9cQrEerC27bP1t6TsHcGSExoQqSLO2KsLe X-Received: by 2002:a62:7905:0:b0:5a9:c75f:bcc4 with SMTP id u5-20020a627905000000b005a9c75fbcc4mr26522861pfc.25.1678434738586; Thu, 09 Mar 2023 23:52:18 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1678434738; cv=none; d=google.com; s=arc-20160816; b=lANJtHe4Xcsj2c00PoH6FjF+UYEo1U/bwQzzGe0h2fe89r0iJVfUD2qgCzXjFC/Ipo 5Mf4Qx0ZhpmUlzUE0c3VZGMjsUENqGvoCcjljWj/r5QrQRTTHX+QA643Gu0egykGn8Ju ONptUeps1nkIDt1ygLciiikhe+TcShmnKKgzxdjxVX10je2hdM3zFHwDZf7/OgLxx7M5 9JiNDGxNqGebg/D3NyoQR2iC4JGy5itEFAu8wKnP3lYX53gEaqBiBsWkj3Rd6o9Tzfyc YScL49KxlNVas9BUWMbAYNLD1mVjj5qxaHwS1Cenim0In9ur7rxV+R58OVDI5r81MsEe dBbA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=RPlmFftO+TzycuPUJ1NMg0ZCQcY+Pbm0zq0mrvNdCFg=; b=oiiCx6GFkgJo79Bc6/FgdCptW+OYjaHNK1LCNLQTZSsn0mavHtbG9t+fLoNpP9pjgo sCtxOBxp9laguhw+J7/DCWo+gSFyd4kb6bWNS7riN1hJykCOsfOK1Yt/pW3PYJBoTjC/ RO5U6OfY2qeADUfMkSAnQHNUX8XipzHXp2IW7fev9O+VHQpzhF7OrJq5THpYyp6XjgCo RtK2agVXL/4BnODUolP1+qR3DWi4EFBt3Wcderj2SscJGS2JCKge3y7qVQCtN4qdBkB8 HglnFB8tO36z1zxryrJmG9/mEVvmsn9GjYRJhzDQrzbn3mVapE5c7cVjarybxhiqTxoR jhQQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id t11-20020a63dd0b000000b005034a57b4d1si1427313pgg.406.2023.03.09.23.52.04; Thu, 09 Mar 2023 23:52:18 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229708AbjCJHqZ convert rfc822-to-8bit (ORCPT + 99 others); Fri, 10 Mar 2023 02:46:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46066 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229830AbjCJHqD (ORCPT ); Fri, 10 Mar 2023 02:46:03 -0500 Received: from fd01.gateway.ufhost.com (fd01.gateway.ufhost.com [61.152.239.71]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2910C38B42; Thu, 9 Mar 2023 23:45:08 -0800 (PST) Received: from EXMBX166.cuchost.com (unknown [175.102.18.54]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "EXMBX166", Issuer "EXMBX166" (not verified)) by fd01.gateway.ufhost.com (Postfix) with ESMTP id 6359924E227; Fri, 10 Mar 2023 15:45:06 +0800 (CST) Received: from EXMBX068.cuchost.com (172.16.6.68) by EXMBX166.cuchost.com (172.16.6.76) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Fri, 10 Mar 2023 15:45:06 +0800 Received: from williamqiu-virtual-machine.starfivetech.com (171.223.208.138) by EXMBX068.cuchost.com (172.16.6.68) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Fri, 10 Mar 2023 15:45:05 +0800 From: William Qiu To: , , CC: Rob Herring , Krzysztof Kozlowski , Philipp Zabel , Thierry Reding , William Qiu , Hal Feng Subject: [PATCH v2 2/2] pwm: starfive: Add PWM driver support Date: Fri, 10 Mar 2023 15:45:03 +0800 Message-ID: <20230310074503.155131-3-william.qiu@starfivetech.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230310074503.155131-1-william.qiu@starfivetech.com> References: <20230310074503.155131-1-william.qiu@starfivetech.com> MIME-Version: 1.0 X-Originating-IP: [171.223.208.138] X-ClientProxiedBy: EXCAS066.cuchost.com (172.16.6.26) To EXMBX068.cuchost.com (172.16.6.68) X-YovoleRuleAgent: yovoleflag X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RCVD_IN_MSPIKE_H2, SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1759966384548493247?= X-GMAIL-MSGID: =?utf-8?q?1759966384548493247?= Add Pulse Width Modulation driver support for StarFive JH7110 soc. Signed-off-by: Hal Feng Signed-off-by: William Qiu --- MAINTAINERS | 7 + drivers/pwm/Kconfig | 10 ++ drivers/pwm/Makefile | 1 + drivers/pwm/pwm-starfive-ptc.c | 245 +++++++++++++++++++++++++++++++++ 4 files changed, 263 insertions(+) create mode 100644 drivers/pwm/pwm-starfive-ptc.c diff --git a/MAINTAINERS b/MAINTAINERS index ac151975d0d3..efe1811f9501 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -19929,6 +19929,13 @@ F: drivers/pinctrl/starfive/pinctrl-starfive-jh71* F: include/dt-bindings/pinctrl/pinctrl-starfive-jh7100.h F: include/dt-bindings/pinctrl/starfive,jh7110-pinctrl.h +STARFIVE JH71X0 PWM DRIVERS +M: William Qiu +M: Hal Feng +S: Supported +F: Documentation/devicetree/bindings/pwm/starfive,jh7110-pwm.yaml +F: drivers/pwm/pwm-starfive-ptc.c + STARFIVE JH71X0 RESET CONTROLLER DRIVERS M: Emil Renner Berthing M: Hal Feng diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig index dae023d783a2..2307a0099994 100644 --- a/drivers/pwm/Kconfig +++ b/drivers/pwm/Kconfig @@ -536,6 +536,16 @@ config PWM_SPRD To compile this driver as a module, choose M here: the module will be called pwm-sprd. +config PWM_STARFIVE_PTC + tristate "StarFive PWM PTC support" + depends on OF + depends on COMMON_CLK + help + Generic PWM framework driver for StarFive SoCs. + + To compile this driver as a module, choose M here: the module + will be called pwm-starfive-ptc. + config PWM_STI tristate "STiH4xx PWM support" depends on ARCH_STI || COMPILE_TEST diff --git a/drivers/pwm/Makefile b/drivers/pwm/Makefile index 7bf1a29f02b8..577f69904baa 100644 --- a/drivers/pwm/Makefile +++ b/drivers/pwm/Makefile @@ -49,6 +49,7 @@ obj-$(CONFIG_PWM_SIFIVE) += pwm-sifive.o obj-$(CONFIG_PWM_SL28CPLD) += pwm-sl28cpld.o obj-$(CONFIG_PWM_SPEAR) += pwm-spear.o obj-$(CONFIG_PWM_SPRD) += pwm-sprd.o +obj-$(CONFIG_PWM_STARFIVE_PTC) += pwm-starfive-ptc.o obj-$(CONFIG_PWM_STI) += pwm-sti.o obj-$(CONFIG_PWM_STM32) += pwm-stm32.o obj-$(CONFIG_PWM_STM32_LP) += pwm-stm32-lp.o diff --git a/drivers/pwm/pwm-starfive-ptc.c b/drivers/pwm/pwm-starfive-ptc.c new file mode 100644 index 000000000000..239df796d240 --- /dev/null +++ b/drivers/pwm/pwm-starfive-ptc.c @@ -0,0 +1,245 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * PWM driver for the StarFive JH7110 SoC + * + * Copyright (C) 2018 StarFive Technology Co., Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +/* how many parameters can be transferred to ptc */ +#define OF_PWM_N_CELLS 3 + +/* PTC Register offsets */ +#define REG_RPTC_CNTR 0x0 +#define REG_RPTC_HRC 0x4 +#define REG_RPTC_LRC 0x8 +#define REG_RPTC_CTRL 0xC + +/* Bit for PWM clock */ +#define BIT_PWM_CLOCK_EN 31 + +/* Bit for clock gen soft reset */ +#define BIT_CLK_GEN_SOFT_RESET 13 + +#define NS_PER_SECOND 1000000000 + +/* + * Access PTC register (cntr hrc lrc and ctrl), + * need to replace PWM_BASE_ADDR + */ +#define REG_PTC_BASE_ADDR_SUB(base, N) \ +((base) + (((N) > 3) ? (((N) % 4) * 0x10 + (1 << 15)) : ((N) * 0x10))) +#define REG_PTC_RPTC_CNTR(base, N) (REG_PTC_BASE_ADDR_SUB(base, N)) +#define REG_PTC_RPTC_HRC(base, N) (REG_PTC_BASE_ADDR_SUB(base, N) + 0x4) +#define REG_PTC_RPTC_LRC(base, N) (REG_PTC_BASE_ADDR_SUB(base, N) + 0x8) +#define REG_PTC_RPTC_CTRL(base, N) (REG_PTC_BASE_ADDR_SUB(base, N) + 0xC) + +/* PTC_RPTC_CTRL */ +#define PTC_EN BIT(0) +#define PTC_ECLK BIT(1) +#define PTC_NEC BIT(2) +#define PTC_OE BIT(3) +#define PTC_SIGNLE BIT(4) +#define PTC_INTE BIT(5) +#define PTC_INT BIT(6) +#define PTC_CNTRRST BIT(7) +#define PTC_CAPTE BIT(8) + +struct starfive_pwm_ptc_device { + struct pwm_chip chip; + struct clk *clk; + struct reset_control *rst; + void __iomem *regs; + int irq; + unsigned int approx_freq;/*pwm apb clock frequency*/ +}; + +static inline +struct starfive_pwm_ptc_device *chip_to_starfive_ptc(struct pwm_chip *c) +{ + return container_of(c, struct starfive_pwm_ptc_device, chip); +} + +static int starfive_pwm_ptc_get_state(struct pwm_chip *chip, + struct pwm_device *dev, + struct pwm_state *state) +{ + struct starfive_pwm_ptc_device *pwm = chip_to_starfive_ptc(chip); + u32 data_lrc, data_hrc; + u32 pwm_clk_ns = 0; + + data_lrc = ioread32(REG_PTC_RPTC_LRC(pwm->regs, dev->hwpwm)); + data_hrc = ioread32(REG_PTC_RPTC_HRC(pwm->regs, dev->hwpwm)); + + pwm_clk_ns = NS_PER_SECOND / pwm->approx_freq; + + state->period = data_lrc * pwm_clk_ns; + state->duty_cycle = data_hrc * pwm_clk_ns; + state->polarity = PWM_POLARITY_NORMAL; + state->enabled = 1; + + return 0; +} + +static int starfive_pwm_ptc_apply(struct pwm_chip *chip, + struct pwm_device *dev, + struct pwm_state *state) +{ + struct starfive_pwm_ptc_device *pwm = chip_to_starfive_ptc(chip); + u32 data_hrc = 0; + u32 data_lrc = 0; + u32 period_data = 0; + u32 duty_data = 0; + s64 multi = pwm->approx_freq; + s64 div = NS_PER_SECOND; + void __iomem *reg_addr; + + if (state->duty_cycle > state->period) + state->duty_cycle = state->period; + + while (multi % 10 == 0 && div % 10 == 0 && multi > 0 && div > 0) { + multi /= 10; + div /= 10; + } + + period_data = (u32)(state->period * multi / div); + if (abs(period_data * div / multi - state->period) + > abs((period_data + 1) * div / multi - state->period) || + (state->period > 0 && period_data == 0)) + period_data += 1; + + if (state->enabled) { + duty_data = (u32)(state->duty_cycle * multi / div); + if (abs(duty_data * div / multi - state->duty_cycle) + > abs((duty_data + 1) * div / multi - state->duty_cycle) || + (state->duty_cycle > 0 && duty_data == 0)) + duty_data += 1; + } else { + duty_data = 0; + } + + if (state->polarity == PWM_POLARITY_NORMAL) + data_hrc = period_data - duty_data; + else + data_hrc = duty_data; + + data_lrc = period_data; + + reg_addr = REG_PTC_RPTC_HRC(pwm->regs, dev->hwpwm); + iowrite32(data_hrc, reg_addr); + + reg_addr = REG_PTC_RPTC_LRC(pwm->regs, dev->hwpwm); + iowrite32(data_lrc, reg_addr); + + reg_addr = REG_PTC_RPTC_CNTR(pwm->regs, dev->hwpwm); + iowrite32(0, reg_addr); + + reg_addr = REG_PTC_RPTC_CTRL(pwm->regs, dev->hwpwm); + iowrite32(PTC_EN | PTC_OE, reg_addr); + + return 0; +} + +static const struct pwm_ops starfive_pwm_ptc_ops = { + .get_state = starfive_pwm_ptc_get_state, + .apply = (void *)starfive_pwm_ptc_apply, + .owner = THIS_MODULE, +}; + +static int starfive_pwm_ptc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct starfive_pwm_ptc_device *pwm; + struct pwm_chip *chip; + int ret; + + pwm = devm_kzalloc(dev, sizeof(*pwm), GFP_KERNEL); + if (!pwm) + return -ENOMEM; + + chip = &pwm->chip; + chip->dev = dev; + chip->ops = &starfive_pwm_ptc_ops; + chip->npwm = 8; + + chip->of_pwm_n_cells = OF_PWM_N_CELLS; + chip->base = -1; + + pwm->regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(pwm->regs)) + return dev_err_probe(dev, PTR_ERR(pwm->regs), + "Unable to map IO resources\n"); + + pwm->clk = devm_clk_get(dev, NULL); + if (IS_ERR(pwm->clk)) + return dev_err_probe(dev, PTR_ERR(pwm->clk), + "Unable to get pwm clock\n"); + + pwm->rst = devm_reset_control_get_exclusive(dev, NULL); + if (IS_ERR(pwm->rst)) + return dev_err_probe(dev, PTR_ERR(pwm->rst), + "Unable to get pwm reset\n"); + + ret = clk_prepare_enable(pwm->clk); + if (ret) { + dev_err(dev, + "Failed to enable pwm clock, %d\n", ret); + return ret; + } + + reset_control_deassert(pwm->rst); + + pwm->approx_freq = (unsigned int)clk_get_rate(pwm->clk); + if (!pwm->approx_freq) + dev_err(dev, "get pwm apb clock rate failed.\n"); + + ret = devm_pwmchip_add(dev, chip); + if (ret < 0) { + dev_err(dev, "cannot register PTC: %d\n", ret); + clk_disable_unprepare(pwm->clk); + return ret; + } + + platform_set_drvdata(pdev, pwm); + + return 0; +} + +static int starfive_pwm_ptc_remove(struct platform_device *dev) +{ + struct starfive_pwm_ptc_device *pwm = platform_get_drvdata(dev); + struct pwm_chip *chip = &pwm->chip; + + pwmchip_remove(chip); + + return 0; +} + +static const struct of_device_id starfive_pwm_ptc_of_match[] = { + { .compatible = "starfive,jh7110-pwm" }, + {}, +}; +MODULE_DEVICE_TABLE(of, starfive_pwm_ptc_of_match); + +static struct platform_driver starfive_pwm_ptc_driver = { + .probe = starfive_pwm_ptc_probe, + .remove = starfive_pwm_ptc_remove, + .driver = { + .name = "pwm-starfive-ptc", + .of_match_table = starfive_pwm_ptc_of_match, + }, +}; +module_platform_driver(starfive_pwm_ptc_driver); + +MODULE_AUTHOR("Jenny Zhang "); +MODULE_AUTHOR("Hal Feng "); +MODULE_DESCRIPTION("StarFive PWM PTC driver"); +MODULE_LICENSE("GPL");