From patchwork Fri Dec 23 09:47:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xingyu Wu X-Patchwork-Id: 13080869 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 CE1B2C4332F for ; Fri, 23 Dec 2022 10:23:53 +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=qd3uNljPlDKjPwGX/+ybo12EA+M/intm4NPnQxdEwuA=; b=didiJl8cWbIOIl Fn/PncCjJkuzkZ6q1s863POzrw7ebOIJrcvwgGcKV0vWFbRa+g0TH7wZUmxkNK0LGH5Uzt+hXvXTA qyGyFuRHZWaUfTzurkly0eQ1HD1B1rQJZo8IY1smr2xuSWcEzTAknOd5xqanffP/Ar/8VOlQ7Bk2o t9XtCfhy+3IfghDAy3hvKMiTNezJpxqjmnFO50ur7yadfKg3ZJWaF1GZ5ED7ZcafiP73a2NlRTBQr AJyrcdoydiiodV9uTqgHIR7hDhkmzPv2+dbxdHetbId59GQ9qbj7M68hdf87CVb6yTD1rzHzZqQOB IGdMk2oK3EIJChdNNkmg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1p8fDJ-006Ln6-HQ; Fri, 23 Dec 2022 10:23:41 +0000 Received: from [61.152.239.75] (helo=ex01.ufhost.com) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1p8efZ-005wUc-LK for linux-riscv@lists.infradead.org; Fri, 23 Dec 2022 09:49:01 +0000 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 ex01.ufhost.com (Postfix) with ESMTP id BCEEE24E2A1; Fri, 23 Dec 2022 17:48:03 +0800 (CST) Received: from EXMBX161.cuchost.com (172.16.6.71) by EXMBX166.cuchost.com (172.16.6.76) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Fri, 23 Dec 2022 17:48:03 +0800 Received: from localhost.localdomain (183.27.97.120) by EXMBX161.cuchost.com (172.16.6.71) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Fri, 23 Dec 2022 17:48:02 +0800 From: Xingyu Wu To: , , "Daniel Lezcano" , Thomas Gleixner , Krzysztof Kozlowski CC: Rob Herring , Paul Walmsley , Palmer Dabbelt , Albert Ou , Philipp Zabel , Xingyu Wu , Samin Guo , Subject: [PATCH v1 1/3] dt-bindings: timer: Add timer for StarFive JH7110 SoC Date: Fri, 23 Dec 2022 17:47:59 +0800 Message-ID: <20221223094801.181315-2-xingyu.wu@starfivetech.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221223094801.181315-1-xingyu.wu@starfivetech.com> References: <20221223094801.181315-1-xingyu.wu@starfivetech.com> MIME-Version: 1.0 X-Originating-IP: [183.27.97.120] X-ClientProxiedBy: EXCAS066.cuchost.com (172.16.6.26) To EXMBX161.cuchost.com (172.16.6.71) X-YovoleRuleAgent: yovoleflag X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221223_014850_210698_8093F2FD X-CRM114-Status: GOOD ( 12.06 ) X-BeenThere: linux-riscv@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-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add bindings for the timer on the JH7110 RISC-V SoC by StarFive Technology Ltd. Signed-off-by: Xingyu Wu --- .../timer/starfive,jh7110-timers.yaml | 105 ++++++++++++++++++ 1 file changed, 105 insertions(+) create mode 100644 Documentation/devicetree/bindings/timer/starfive,jh7110-timers.yaml diff --git a/Documentation/devicetree/bindings/timer/starfive,jh7110-timers.yaml b/Documentation/devicetree/bindings/timer/starfive,jh7110-timers.yaml new file mode 100644 index 000000000000..fe58dc056313 --- /dev/null +++ b/Documentation/devicetree/bindings/timer/starfive,jh7110-timers.yaml @@ -0,0 +1,105 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/timer/starfive,jh7110-timers.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: StarFive Timers + +maintainers: + - Samin Guo + - Xingyu Wu + +properties: + compatible: + const: starfive,jh7110-timers + + reg: + maxItems: 1 + + interrupts: + items: + - description: timer channel 0 interrupt + - description: timer channel 1 interrupt + - description: timer channel 2 interrupt + - description: timer channel 3 interrupt + + interrupt-names: + items: + - const: timer0 + - const: timer1 + - const: timer2 + - const: timer3 + + clocks: + items: + - description: timer channel 0 clock + - description: timer channel 1 clock + - description: timer channel 2 clock + - description: timer channel 3 clock + - description: APB clock + + clock-names: + items: + - const: timer0 + - const: timer1 + - const: timer2 + - const: timer3 + - const: apb + + resets: + items: + - description: timer channel 0 reset + - description: timer channel 1 reset + - description: timer channel 2 reset + - description: timer channel 3 reset + - description: APB reset + + reset-names: + items: + - const: timer0 + - const: timer1 + - const: timer2 + - const: timer3 + - const: apb + + clock-frequency: + description: The frequency of the clock that drives the counter, in Hz. + +required: + - compatible + - reg + - interrupts + - interrupt-names + - clocks + - clock-names + - resets + - reset-names + - clock-frequency + +unevaluatedProperties: false + +examples: + - | + timer@13050000 { + compatible = "starfive,jh7110-timers"; + reg = <0x13050000 0x10000>; + interrupts = <69>, <70>, <71> ,<72>; + interrupt-names = "timer0", "timer1", "timer2", "timer3"; + clocks = <&clk 125>, + <&clk 126>, + <&clk 127>, + <&clk 128>, + <&clk 124>; + clock-names = "timer0", "timer1", + "timer2", "timer3", "apb"; + resets = <&rst 118>, + <&rst 119>, + <&rst 120>, + <&rst 121>, + <&rst 117>; + reset-names = "timer0", "timer1", + "timer2", "timer3", "apb"; + clock-frequency = <24000000>; + }; + From patchwork Fri Dec 23 09:48:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xingyu Wu X-Patchwork-Id: 13080870 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 08B4EC4332F for ; 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Fri, 23 Dec 2022 10:24:10 +0000 Received: from [61.152.239.71] (helo=fd01.gateway.ufhost.com) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1p8efe-005wUY-KS for linux-riscv@lists.infradead.org; Fri, 23 Dec 2022 09:49:08 +0000 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 7C66C24DFDC; Fri, 23 Dec 2022 17:48:04 +0800 (CST) Received: from EXMBX161.cuchost.com (172.16.6.71) by EXMBX165.cuchost.com (172.16.6.75) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Fri, 23 Dec 2022 17:48:04 +0800 Received: from localhost.localdomain (183.27.97.120) by EXMBX161.cuchost.com (172.16.6.71) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Fri, 23 Dec 2022 17:48:03 +0800 From: Xingyu Wu To: , , "Daniel Lezcano" , Thomas Gleixner , Krzysztof Kozlowski CC: Rob Herring , Paul Walmsley , Palmer Dabbelt , Albert Ou , Philipp Zabel , Xingyu Wu , Samin Guo , Subject: [PATCH v1 2/3] clocksource: Add StarFive timer driver Date: Fri, 23 Dec 2022 17:48:00 +0800 Message-ID: <20221223094801.181315-3-xingyu.wu@starfivetech.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221223094801.181315-1-xingyu.wu@starfivetech.com> References: <20221223094801.181315-1-xingyu.wu@starfivetech.com> MIME-Version: 1.0 X-Originating-IP: [183.27.97.120] X-ClientProxiedBy: EXCAS066.cuchost.com (172.16.6.26) To EXMBX161.cuchost.com (172.16.6.71) X-YovoleRuleAgent: yovoleflag X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221223_014855_473191_FCC33DF8 X-CRM114-Status: GOOD ( 30.68 ) X-BeenThere: linux-riscv@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-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add timer driver for the StarFive JH7110 SoC. Signed-off-by: Xingyu Wu --- MAINTAINERS | 7 + drivers/clocksource/Kconfig | 12 + drivers/clocksource/Makefile | 1 + drivers/clocksource/timer-starfive.c | 465 +++++++++++++++++++++++++++ drivers/clocksource/timer-starfive.h | 104 ++++++ 5 files changed, 589 insertions(+) create mode 100644 drivers/clocksource/timer-starfive.c create mode 100644 drivers/clocksource/timer-starfive.h diff --git a/MAINTAINERS b/MAINTAINERS index a70c1d0f303e..340ad9e0a31f 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -19623,6 +19623,13 @@ F: Documentation/devicetree/bindings/reset/starfive,jh7100-reset.yaml F: drivers/reset/starfive/ F: include/dt-bindings/reset/starfive* +STARFIVE TIMER DRIVER +M: Samin Guo +M: Xingyu Wu +S: Supported +F: Documentation/devicetree/bindings/timer/starfive* +F: drivers/clocksource/timer-starfive* + STATIC BRANCH/CALL M: Peter Zijlstra M: Josh Poimboeuf diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index 4469e7f555e9..11400b3a8f5c 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -630,6 +630,18 @@ config RISCV_TIMER is accessed via both the SBI and the rdcycle instruction. This is required for all RISC-V systems. +config STARFIVE_TIMER + bool "Timer for the STARFIVE SoCs" + depends on RISCV && OF && (SOC_STARFIVE || COMPILE_TEST) + select TIMER_OF + select CLKSRC_MMIO + default SOC_STARFIVE + help + This enables the timers for StarFive SoCs. On RISC-V platform, + the system has started RISCV_TIMER. But you can also use these timers + to do a lot more on StarFive SoCs. These timers can provide much + higher precision than RISCV_TIMER. + config CLINT_TIMER bool "CLINT Timer for the RISC-V platform" if COMPILE_TEST depends on GENERIC_SCHED_CLOCK && RISCV diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile index 64ab547de97b..276695d95cdc 100644 --- a/drivers/clocksource/Makefile +++ b/drivers/clocksource/Makefile @@ -80,6 +80,7 @@ obj-$(CONFIG_INGENIC_TIMER) += ingenic-timer.o obj-$(CONFIG_CLKSRC_ST_LPC) += clksrc_st_lpc.o obj-$(CONFIG_X86_NUMACHIP) += numachip.o obj-$(CONFIG_RISCV_TIMER) += timer-riscv.o +obj-$(CONFIG_STARFIVE_TIMER) += timer-starfive.o obj-$(CONFIG_CLINT_TIMER) += timer-clint.o obj-$(CONFIG_CSKY_MP_TIMER) += timer-mp-csky.o obj-$(CONFIG_GX6605S_TIMER) += timer-gx6605s.o diff --git a/drivers/clocksource/timer-starfive.c b/drivers/clocksource/timer-starfive.c new file mode 100644 index 000000000000..8db413a22fdc --- /dev/null +++ b/drivers/clocksource/timer-starfive.c @@ -0,0 +1,465 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Starfive Timer driver + * + * Copyright (C) 2022 StarFive Technology Co., Ltd. + * + * Author: + * Xingyu Wu + * Samin Guo + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "timer-starfive.h" + +struct starfive_timer __initdata starfive_timer_jh7110 = { + .ctrl = STARFIVE_TIMER_JH7110_CTL, + .load = STARFIVE_TIMER_JH7110_LOAD, + .enable = STARFIVE_TIMER_JH7110_ENABLE, + .reload = STARFIVE_TIMER_JH7110_RELOAD, + .value = STARFIVE_TIMER_JH7110_VALUE, + .intclr = STARFIVE_TIMER_JH7110_INT_CLR, + .intmask = STARFIVE_TIMER_JH7110_INT_MASK, + .timer_base = {STARFIVE_TIMER_BASE(0), STARFIVE_TIMER_BASE(1), + STARFIVE_TIMER_BASE(2), STARFIVE_TIMER_BASE(3)}, +}; + +static inline struct starfive_clkevt *to_starfive_clkevt(struct clock_event_device *evt) +{ + return container_of(evt, struct starfive_clkevt, evt); +} + +/* 0:continuous-run mode, 1:single-run mode */ +static inline void starfive_timer_set_mod(struct starfive_clkevt *clkevt, int mod) +{ + writel(mod, clkevt->ctrl); +} + +/* Interrupt Mask Register, 0:Unmask, 1:Mask */ +static inline void starfive_timer_int_enable(struct starfive_clkevt *clkevt) +{ + writel(INTMASK_ENABLE_DIS, clkevt->intmask); +} + +static inline void starfive_timer_int_disable(struct starfive_clkevt *clkevt) +{ + writel(INTMASK_ENABLE, clkevt->intmask); +} + +/* + * BIT(0): Read value represent channel intr status. + * Write 1 to this bit to clear interrupt. Write 0 has no effects. + * BIT(1): "1" means that it is clearing interrupt. BIT(0) can not be written. + */ +static inline void starfive_timer_int_clear(struct starfive_clkevt *clkevt) +{ + /* waiting interrupt can be to clearing */ + u32 value; + int ret = 0; + + value = readl(clkevt->intclr); + ret = readl_poll_timeout_atomic(clkevt->intclr, value, + !(value & STARFIVE_TIMER_JH7110_INT_STATUS_CLR_AVA), + STARFIVE_DELAY_US, STARFIVE_TIMEOUT_US); + if (!ret) + writel(1, clkevt->intclr); +} + +/* + * The initial value to be loaded into the + * counter and is also used as the reload value. + */ +static inline void starfive_timer_set_load(struct starfive_clkevt *clkevt, u32 val) +{ + writel(val, clkevt->load); +} + +static inline u32 starfive_timer_get_val(struct starfive_clkevt *clkevt) +{ + return readl(clkevt->value); +} + +/* + * Write RELOAD register to reload preset value to counter. + * (Write 0 and write 1 are both ok) + */ +static inline void starfive_timer_set_reload(struct starfive_clkevt *clkevt) +{ + writel(1, clkevt->reload); +} + +static inline void starfive_timer_enable(struct starfive_clkevt *clkevt) +{ + writel(TIMER_ENA, clkevt->enable); +} + +static inline void starfive_timer_disable(struct starfive_clkevt *clkevt) +{ + writel(TIMER_ENA_DIS, clkevt->enable); +} + +static void timer_shutdown(struct starfive_clkevt *clkevt) +{ + starfive_timer_int_disable(clkevt); + starfive_timer_disable(clkevt); + starfive_timer_int_clear(clkevt); +} + +static void starfive_timer_suspend(struct clock_event_device *evt) +{ + struct starfive_clkevt *clkevt = to_starfive_clkevt(evt); + + clkevt->reload_val = starfive_timer_get_val(clkevt); + + starfive_timer_disable(clkevt); + starfive_timer_int_disable(clkevt); + starfive_timer_int_clear(clkevt); +} + +static void starfive_timer_resume(struct clock_event_device *evt) +{ + struct starfive_clkevt *clkevt = to_starfive_clkevt(evt); + + starfive_timer_set_load(clkevt, clkevt->reload_val); + starfive_timer_set_reload(clkevt); + starfive_timer_int_enable(clkevt); + starfive_timer_enable(clkevt); +} + +static int starfive_timer_tick_resume(struct clock_event_device *evt) +{ + starfive_timer_resume(evt); + + return 0; +} + +static int starfive_timer_shutdown(struct clock_event_device *evt) +{ + struct starfive_clkevt *clkevt = to_starfive_clkevt(evt); + + timer_shutdown(clkevt); + + return 0; +} + +static int starfive_get_clock_rate(struct starfive_clkevt *clkevt, struct device_node *np) +{ + int ret; + u32 rate; + + if (clkevt->clk) { + clkevt->rate = clk_get_rate(clkevt->clk); + if (clkevt->rate > 0) { + pr_debug("clk_get_rate clkevt->rate: %d\n", clkevt->rate); + return 0; + } + } + + /* Next we try to get clock-frequency from dts.*/ + ret = of_property_read_u32(np, "clock-frequency", &rate); + if (!ret) { + pr_debug("Timer: try get clock-frequency:%d Hz\n", rate); + clkevt->rate = rate; + return 0; + } + pr_err("Timer: get rate failed, need clock-frequency define in dts.\n"); + + return -ENOENT; +} + +static int starfive_clocksource_init(struct starfive_clkevt *clkevt, + const char *name, struct device_node *np) +{ + starfive_timer_set_mod(clkevt, MOD_CONTIN); + starfive_timer_set_load(clkevt, STARFIVE_MAX_TICKS); /* val = rate --> 1s */ + starfive_timer_int_disable(clkevt); + starfive_timer_int_clear(clkevt); + starfive_timer_int_enable(clkevt); + starfive_timer_enable(clkevt); + + return clocksource_mmio_init(clkevt->value, name, clkevt->rate, + STARFIVE_CLOCK_SOURCE_RATING, STARFIVE_VALID_BITS, + clocksource_mmio_readl_down); +} + +/* + * IRQ handler for the timer + */ +static irqreturn_t starfive_timer_interrupt(int irq, void *priv) +{ + struct clock_event_device *evt = (struct clock_event_device *)priv; + struct starfive_clkevt *clkevt = to_starfive_clkevt(evt); + + starfive_timer_int_clear(clkevt); + + if (evt->event_handler) + evt->event_handler(evt); + + return IRQ_HANDLED; +} + +static int starfive_timer_set_periodic(struct clock_event_device *evt) +{ + struct starfive_clkevt *clkevt = to_starfive_clkevt(evt); + + starfive_timer_disable(clkevt); + starfive_timer_set_mod(clkevt, MOD_CONTIN); + starfive_timer_set_load(clkevt, clkevt->periodic); + starfive_timer_int_disable(clkevt); + starfive_timer_int_clear(clkevt); + starfive_timer_int_enable(clkevt); + starfive_timer_enable(clkevt); + + return 0; +} + +static int starfive_timer_set_oneshot(struct clock_event_device *evt) +{ + struct starfive_clkevt *clkevt = to_starfive_clkevt(evt); + + starfive_timer_disable(clkevt); + starfive_timer_set_mod(clkevt, MOD_SINGLE); + starfive_timer_set_load(clkevt, STARFIVE_MAX_TICKS); + starfive_timer_int_disable(clkevt); + starfive_timer_int_clear(clkevt); + starfive_timer_int_enable(clkevt); + starfive_timer_enable(clkevt); + + return 0; +} + +static int starfive_timer_set_next_event(unsigned long next, + struct clock_event_device *evt) +{ + struct starfive_clkevt *clkevt = to_starfive_clkevt(evt); + + starfive_timer_disable(clkevt); + starfive_timer_set_mod(clkevt, MOD_SINGLE); + starfive_timer_set_load(clkevt, next); + starfive_timer_enable(clkevt); + + return 0; +} + +static void starfive_set_clockevent(struct clock_event_device *evt) +{ + evt->features = CLOCK_EVT_FEAT_PERIODIC | + CLOCK_EVT_FEAT_ONESHOT | + CLOCK_EVT_FEAT_DYNIRQ; + evt->set_state_shutdown = starfive_timer_shutdown; + evt->set_state_periodic = starfive_timer_set_periodic; + evt->set_state_oneshot = starfive_timer_set_oneshot; + evt->set_state_oneshot_stopped = starfive_timer_shutdown; + evt->tick_resume = starfive_timer_tick_resume; + evt->set_next_event = starfive_timer_set_next_event; + evt->suspend = starfive_timer_suspend; + evt->resume = starfive_timer_resume; + evt->rating = STARFIVE_CLOCKEVENT_RATING; +} + +static int starfive_clockevents_register(struct starfive_clkevt *clkevt, unsigned int irq, + struct device_node *np, const char *name) +{ + int ret = 0; + + ret = starfive_get_clock_rate(clkevt, np); + if (ret) + return -EINVAL; + + clkevt->periodic = DIV_ROUND_CLOSEST(clkevt->rate, HZ); + + starfive_set_clockevent(&clkevt->evt); + clkevt->evt.name = name; + clkevt->evt.irq = irq; + clkevt->evt.cpumask = cpu_possible_mask; + + ret = request_irq(irq, starfive_timer_interrupt, + IRQF_TIMER | IRQF_IRQPOLL, name, &clkevt->evt); + if (ret) + pr_err("%s: request_irq failed\n", name); + + clockevents_config_and_register(&clkevt->evt, clkevt->rate, + STARFIVE_MIN_TICKS, STARFIVE_MAX_TICKS); + + return ret; +} + +static void __init starfive_clkevt_base_init(struct starfive_timer *timer, + struct starfive_clkevt *clkevt, + void __iomem *base, int index) +{ + void __iomem *timer_base; + + timer_base = base + timer->timer_base[index]; + clkevt->base = timer_base; + clkevt->ctrl = timer_base + timer->ctrl; + clkevt->load = timer_base + timer->load; + clkevt->enable = timer_base + timer->enable; + clkevt->reload = timer_base + timer->reload; + clkevt->value = timer_base + timer->value; + clkevt->intclr = timer_base + timer->intclr; + clkevt->intmask = timer_base + timer->intmask; +} + +static int __init starfive_timer_jh7110_of_init(struct device_node *np) +{ + int index, count, irq, ret; + const char *name = NULL; + struct clk *clk; + struct clk *pclk; + struct reset_control *prst; + struct reset_control *rst; + struct starfive_clkevt *clkevt[STARFIVE_NR_TIMERS]; + void __iomem *base; + struct starfive_timer *timer = &starfive_timer_jh7110; + + base = of_iomap(np, 0); + if (!base) + return -ENXIO; + + if (!of_device_is_available(np)) { + ret = -EINVAL; + goto err; + } + + pclk = of_clk_get_by_name(np, "apb"); + if (!IS_ERR(pclk)) { + if (clk_prepare_enable(pclk)) + pr_warn("pclk for %pOFn is present, but could not be activated\n", np); + /* + * Clock framework support is late, continue on + * anyways if we don't find a matching clock. + */ + } else if (PTR_ERR(pclk) != -EPROBE_DEFER) { + ret = PTR_ERR(pclk); + goto err; + } + + prst = of_reset_control_get(np, "apb"); + if (!IS_ERR(prst)) { + ret = reset_control_deassert(prst); + if (ret) + goto prst_err; + /* + * Reset framework support is late, continue on + * anyways if we don't find a matching reset. + */ + } else if (PTR_ERR(prst) != -EPROBE_DEFER) { + ret = PTR_ERR(prst); + goto prst_err; + } + + /* The number of timers used is determined according to the device tree. */ + count = of_irq_count(np); + if (count > STARFIVE_NR_TIMERS || count <= 0) { + ret = -EINVAL; + goto count_err; + } + + for (index = 0; index < count; index++) { + of_property_read_string_index(np, "clock-names", index, &name); + if (strncmp(name, "timer", strlen("timer"))) + continue; + + clkevt[index] = kzalloc(sizeof(*clkevt[index]), GFP_KERNEL); + if (!clkevt[index]) { + ret = -ENOMEM; + goto clkevt_err; + } + + starfive_clkevt_base_init(timer, clkevt[index], base, index); + + /* Ensure timers are disabled */ + starfive_timer_disable(clkevt[index]); + + clk = of_clk_get_by_name(np, name); + if (!IS_ERR(clk)) { + clkevt[index]->clk = clk; + if (clk_prepare_enable(clkevt[index]->clk)) + pr_warn("clk for %pOFn is present, but could not be activated\n", + np); + } else if (PTR_ERR(clk) != -EPROBE_DEFER) { + ret = PTR_ERR(clk); + goto clk_err; + } + + rst = of_reset_control_get(np, name); + if (!IS_ERR(rst)) { + clkevt[index]->rst = rst; + ret = reset_control_deassert(clkevt[index]->rst); + if (ret) + goto rst_err; + } + + irq = irq_of_parse_and_map(np, index); + if (irq < 0) { + ret = -EINVAL; + goto irq_err; + } + + snprintf(clkevt[index]->name, sizeof(clkevt[index]->name), "%s.ch%d", + np->full_name, index); + + ret = starfive_clockevents_register(clkevt[index], irq, np, clkevt[index]->name); + if (ret) { + pr_err("%s: init clockevents failed.\n", clkevt[index]->name); + goto register_err; + } + clkevt[index]->irq = irq; + + ret = starfive_clocksource_init(clkevt[index], clkevt[index]->name, np); + if (ret) + goto init_err; + } + if (!IS_ERR(pclk)) + clk_put(pclk); + + return 0; + +init_err: +register_err: + free_irq(clkevt[index]->irq, &clkevt[index]->evt); +irq_err: +rst_err: +clk_err: + /* Only unregister the failed timer and the rest timers continue to work. */ + if (!clkevt[index]->rst) { + reset_control_assert(clkevt[index]->rst); + reset_control_put(clkevt[index]->rst); + } + if (!clkevt[index]->clk) { + clk_disable_unprepare(clkevt[index]->clk); + clk_put(clkevt[index]->clk); + } + kfree(clkevt[index]); +clkevt_err: +count_err: +prst_err: + if (!IS_ERR(pclk)) { + /* If no other timer successfully registers, pclk is disabled. */ + if (!index) + clk_disable_unprepare(pclk); + clk_put(pclk); + } +err: + iounmap(base); + return ret; +} + +TIMER_OF_DECLARE(starfive_timer_jh7110, "starfive,jh7110-timers", starfive_timer_jh7110_of_init); diff --git a/drivers/clocksource/timer-starfive.h b/drivers/clocksource/timer-starfive.h new file mode 100644 index 000000000000..9fd3303b31d1 --- /dev/null +++ b/drivers/clocksource/timer-starfive.h @@ -0,0 +1,104 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2022 StarFive Technology Co., Ltd. + */ + +#ifndef __STARFIVE_TIMER_H__ +#define __STARFIVE_TIMER_H__ + +#define STARFIVE_NR_TIMERS TIMERS_MAX +/* Bias: Timer0-0x0, Timer1-0x40, Timer2-0x80, and so on. */ +#define STARFIVE_PER_TIMER_LEN 0x40 +#define STARFIVE_TIMER_BASE(x) ((TIMER_##x) * STARFIVE_PER_TIMER_LEN) + +#define STARFIVE_CLOCK_SOURCE_RATING 200 +#define STARFIVE_VALID_BITS 32 +#define STARFIVE_DELAY_US 0 +#define STARFIVE_TIMEOUT_US 10000 +#define STARFIVE_CLOCKEVENT_RATING 300 +#define STARFIVE_MAX_TICKS 0xffffffff +#define STARFIVE_MIN_TICKS 0xf + +/* + * JH7110 timer TIMER_INT_STATUS: + * ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ + * | Bits | 08~31 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | + * ---------------------------------------------------------- + * | timer(n)_int | res | 6 | 5 | 4 | Wdt | 3 | 2 | 1 | 0 | + * ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ + * + * Software can read this register to know which interrupt is occurred. + */ +#define STARFIVE_TIMER_JH7110_INT_STATUS 0x00 +#define STARFIVE_TIMER_JH7110_CTL 0x04 +#define STARFIVE_TIMER_JH7110_LOAD 0x08 +#define STARFIVE_TIMER_JH7110_ENABLE 0x10 +#define STARFIVE_TIMER_JH7110_RELOAD 0x14 +#define STARFIVE_TIMER_JH7110_VALUE 0x18 +#define STARFIVE_TIMER_JH7110_INT_CLR 0x20 +#define STARFIVE_TIMER_JH7110_INT_MASK 0x24 +#define STARFIVE_TIMER_JH7110_INT_STATUS_CLR_AVA BIT(1) + +enum STARFIVE_TIMERS { + TIMER_0 = 0, + TIMER_1, + TIMER_2, + TIMER_3, + TIMER_4, /*WDT*/ + TIMER_5, + TIMER_6, + TIMER_7, + TIMERS_MAX +}; + +enum TIMERI_INTMASK { + INTMASK_ENABLE_DIS = 0, + INTMASK_ENABLE = 1 +}; + +enum TIMER_MOD { + MOD_CONTIN = 0, + MOD_SINGLE = 1 +}; + +enum TIMER_CTL_EN { + TIMER_ENA_DIS = 0, + TIMER_ENA = 1 +}; + +enum { + INT_CLR_AVAILABLE = 0, + INT_CLR_NOT_AVAILABLE = 1 +}; + +struct starfive_timer { + u32 ctrl; + u32 load; + u32 enable; + u32 reload; + u32 value; + u32 intclr; + u32 intmask; + u32 wdt_lock; /* 0x3c+i*0x40 watchdog use ONLY */ + u32 timer_base[STARFIVE_NR_TIMERS]; +}; + +struct starfive_clkevt { + struct clock_event_device evt; + struct clk *clk; + struct reset_control *rst; + char name[20]; + int irq; + u32 periodic; + u32 rate; + u32 reload_val; + void __iomem *base; + void __iomem *ctrl; + void __iomem *load; + void __iomem *enable; + void __iomem *reload; + void __iomem *value; + void __iomem *intclr; + void __iomem *intmask; +}; +#endif /* __STARFIVE_TIMER_H__ */ From patchwork Fri Dec 23 09:48:01 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xingyu Wu X-Patchwork-Id: 13080867 X-Patchwork-Delegate: mail@conchuod.ie 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 1431DC4332F for ; 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X-BeenThere: linux-riscv@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-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add the timer node for the Starfive JH7110 SoC. Signed-off-by: Xingyu Wu --- arch/riscv/boot/dts/starfive/jh7110.dtsi | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/arch/riscv/boot/dts/starfive/jh7110.dtsi b/arch/riscv/boot/dts/starfive/jh7110.dtsi index c22e8f1d2640..3936c7c0c962 100644 --- a/arch/riscv/boot/dts/starfive/jh7110.dtsi +++ b/arch/riscv/boot/dts/starfive/jh7110.dtsi @@ -356,6 +356,28 @@ gpioa: gpio@17020000 { #gpio-cells = <2>; }; + timer: timer@13050000 { + compatible = "starfive,jh7110-timers"; + reg = <0x0 0x13050000 0x0 0x10000>; + interrupts = <69>, <70>, <71> ,<72>; + interrupt-names = "timer0", "timer1", "timer2", "timer3"; + clocks = <&syscrg JH7110_SYSCLK_TIMER0>, + <&syscrg JH7110_SYSCLK_TIMER1>, + <&syscrg JH7110_SYSCLK_TIMER2>, + <&syscrg JH7110_SYSCLK_TIMER3>, + <&syscrg JH7110_SYSCLK_TIMER_APB>; + clock-names = "timer0", "timer1", + "timer2", "timer3", "apb"; + resets = <&syscrg JH7110_SYSRST_TIMER0>, + <&syscrg JH7110_SYSRST_TIMER1>, + <&syscrg JH7110_SYSRST_TIMER2>, + <&syscrg JH7110_SYSRST_TIMER3>, + <&syscrg JH7110_SYSRST_TIMER_APB>; + reset-names = "timer0", "timer1", + "timer2", "timer3", "apb"; + clock-frequency = <24000000>; + }; + uart0: serial@10000000 { compatible = "snps,dw-apb-uart"; reg = <0x0 0x10000000 0x0 0x10000>;