From patchwork Tue Jun 27 05:53:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xingyu Wu X-Patchwork-Id: 13294013 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 BC885EB64DC for ; Tue, 27 Jun 2023 05:54:13 +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=4dX2t4fqTnEEcubPPC+wcDymiUOQfTHC7OH1RR1IJ0w=; b=kAVudcY1LZd04V 3FrkrzHUgomDgRLz05uQj9mHXPINrYgOzIpyhnJGFKu3u2NlUiIb/AsDN2xFHLlarHXjFwj6eWgUV mDHItlnjdbe5EcxjWT3vOcvs7EmBiP56XiRu7wfFchz076sN5xwanpEHcKEGjiVUMdtRCzCyEOyFB ur3R8gbARkXF+0B1f5LSFOSs3oOy3eBN/nM0yii8nNtWuWlFlHwJJwPYCoHcwzd5VKQz12rJH/9vQ 4Arf7z/46X4Qst7bAVpbyKX279VbCvmU5BLWSRXetRniQMoYmCZpoYElOZizzL5ydm9hJZLytNCv7 kaJqs4ZEULqRgVnBpqHw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qE1eT-00BzKy-0b; Tue, 27 Jun 2023 05:54:09 +0000 Received: from ex01.ufhost.com ([61.152.239.75]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qE1eQ-00BytV-1a for linux-riscv@lists.infradead.org; Tue, 27 Jun 2023 05:54:08 +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 ex01.ufhost.com (Postfix) with ESMTP id 930FF24DBC0; Tue, 27 Jun 2023 13:53:15 +0800 (CST) Received: from EXMBX061.cuchost.com (172.16.6.61) by EXMBX165.cuchost.com (172.16.6.75) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Tue, 27 Jun 2023 13:53:15 +0800 Received: from localhost.localdomain (183.27.97.206) by EXMBX061.cuchost.com (172.16.6.61) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Tue, 27 Jun 2023 13:53:14 +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 , , Conor Dooley Subject: [PATCH v3 1/3] dt-bindings: timer: Add timer for StarFive JH7110 SoC Date: Tue, 27 Jun 2023 13:53:11 +0800 Message-ID: <20230627055313.252519-2-xingyu.wu@starfivetech.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230627055313.252519-1-xingyu.wu@starfivetech.com> References: <20230627055313.252519-1-xingyu.wu@starfivetech.com> MIME-Version: 1.0 X-Originating-IP: [183.27.97.206] X-ClientProxiedBy: EXCAS066.cuchost.com (172.16.6.26) To EXMBX061.cuchost.com (172.16.6.61) X-YovoleRuleAgent: yovoleflag X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230626_225406_816674_6E73E02B X-CRM114-Status: GOOD ( 12.63 ) 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. Reviewed-by: Krzysztof Kozlowski Signed-off-by: Xingyu Wu --- .../bindings/timer/starfive,jh7110-timer.yaml | 96 +++++++++++++++++++ 1 file changed, 96 insertions(+) create mode 100644 Documentation/devicetree/bindings/timer/starfive,jh7110-timer.yaml diff --git a/Documentation/devicetree/bindings/timer/starfive,jh7110-timer.yaml b/Documentation/devicetree/bindings/timer/starfive,jh7110-timer.yaml new file mode 100644 index 000000000000..9a2dac11eb06 --- /dev/null +++ b/Documentation/devicetree/bindings/timer/starfive,jh7110-timer.yaml @@ -0,0 +1,96 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/timer/starfive,jh7110-timer.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: StarFive JH7110 Timer + +maintainers: + - Xingyu Wu + - Samin Guo + +description: + This timer has four free-running 32 bit counters in StarFive JH7110 SoC. + And each channel(counter) triggers an interrupt when timeout. They support + one-shot mode and continuous-run mode. + +properties: + compatible: + const: starfive,jh7110-timer + + reg: + maxItems: 1 + + interrupts: + items: + - description: channel 0 + - description: channel 1 + - description: channel 2 + - description: channel 3 + + clocks: + items: + - description: timer APB + - description: channel 0 + - description: channel 1 + - description: channel 2 + - description: channel 3 + + clock-names: + items: + - const: apb + - const: ch0 + - const: ch1 + - const: ch2 + - const: ch3 + + resets: + items: + - description: timer APB + - description: channel 0 + - description: channel 1 + - description: channel 2 + - description: channel 3 + + reset-names: + items: + - const: apb + - const: ch0 + - const: ch1 + - const: ch2 + - const: ch3 + +required: + - compatible + - reg + - interrupts + - clocks + - clock-names + - resets + - reset-names + +additionalProperties: false + +examples: + - | + timer@13050000 { + compatible = "starfive,jh7110-timer"; + reg = <0x13050000 0x10000>; + interrupts = <69>, <70>, <71> ,<72>; + clocks = <&clk 124>, + <&clk 125>, + <&clk 126>, + <&clk 127>, + <&clk 128>; + clock-names = "apb", "ch0", "ch1", + "ch2", "ch3"; + resets = <&rst 117>, + <&rst 118>, + <&rst 119>, + <&rst 120>, + <&rst 121>; + reset-names = "apb", "ch0", "ch1", + "ch2", "ch3"; + }; + From patchwork Tue Jun 27 05:53:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xingyu Wu X-Patchwork-Id: 13294012 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 12E09EB64DC for ; Tue, 27 Jun 2023 05:54:08 +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=H8UFiLrY9C9xntXALxXki5x2YDJUxoM3tZlCo4ZaHCk=; b=ZFSvbkYhtx8gyk kjfjiCbwGDZkGHrzTuesOQkmoOAp7e72kPJM2QdyebKSIFxC/xQl/FY1vbZ8j6m2+11wiwEogrZ1f +I9nrstK+QoO1cMeUcx2vEDrRGyx7gVCVDStY6PKL/p/vOTPiT8VuSNValV4XzQzVhOc/ClNlRlX0 ldOhokMAAsbhzwaDFX//sYFebgyKk4howC38EhrizOMJGnFRQZ8cWqZTUblH/yOiOCKkg+4Rx/cru qygvSVAAngDt6+wgvNBmAhlIpDdTdiZdmRQyFl7PQaacldCjiiOhYkoDbIl+7yKPViDR2iz0MTD5/ cR/Cfst9yofV5uXOL5sQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qE1eO-00BzG7-1J; Tue, 27 Jun 2023 05:54:04 +0000 Received: from ex01.ufhost.com ([61.152.239.75]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qE1eK-00BytU-2j for linux-riscv@lists.infradead.org; Tue, 27 Jun 2023 05:54:03 +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 5A6BF24DBCE; Tue, 27 Jun 2023 13:53:16 +0800 (CST) Received: from EXMBX061.cuchost.com (172.16.6.61) by EXMBX166.cuchost.com (172.16.6.76) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Tue, 27 Jun 2023 13:53:16 +0800 Received: from localhost.localdomain (183.27.97.206) by EXMBX061.cuchost.com (172.16.6.61) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Tue, 27 Jun 2023 13:53:15 +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 , , Conor Dooley Subject: [PATCH v3 2/3] clocksource: Add JH7110 timer driver Date: Tue, 27 Jun 2023 13:53:12 +0800 Message-ID: <20230627055313.252519-3-xingyu.wu@starfivetech.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230627055313.252519-1-xingyu.wu@starfivetech.com> References: <20230627055313.252519-1-xingyu.wu@starfivetech.com> MIME-Version: 1.0 X-Originating-IP: [183.27.97.206] X-ClientProxiedBy: EXCAS066.cuchost.com (172.16.6.26) To EXMBX061.cuchost.com (172.16.6.61) X-YovoleRuleAgent: yovoleflag X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230626_225401_324542_7AD42089 X-CRM114-Status: GOOD ( 27.44 ) 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 | 11 + drivers/clocksource/Makefile | 1 + drivers/clocksource/timer-jh7110.c | 485 +++++++++++++++++++++++++++++ 4 files changed, 504 insertions(+) create mode 100644 drivers/clocksource/timer-jh7110.c diff --git a/MAINTAINERS b/MAINTAINERS index 6992b7cc7095..4e8e39ae685c 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -20125,6 +20125,13 @@ S: Supported F: Documentation/devicetree/bindings/mmc/starfive* F: drivers/mmc/host/dw_mmc-starfive.c +STARFIVE JH7110 TIMER DRIVER +M: Samin Guo +M: Xingyu Wu +S: Supported +F: Documentation/devicetree/bindings/timer/starfive,jh7110-timer.yaml +F: drivers/clocksource/timer-jh7110.c + STARFIVE JH71X0 CLOCK DRIVERS M: Emil Renner Berthing M: Hal Feng diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index 526382dc7482..a1393ec074c0 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -639,6 +639,17 @@ config RISCV_TIMER is accessed via both the SBI and the rdcycle instruction. This is required for all RISC-V systems. +config STARFIVE_JH7110_TIMER + bool "Timer for the STARFIVE JH7110 SoC" + depends on ARCH_STARFIVE || COMPILE_TEST + select TIMER_OF + select CLKSRC_MMIO + default ARCH_STARFIVE + help + This enables the timer for StarFive JH7110 SoCs. On RISC-V platform, + the system has started RISCV_TIMER. But you can also use this timer + which can provides four channels to do a lot more on JH7110 SoC. + 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 f12d3987a960..791fb3379f50 100644 --- a/drivers/clocksource/Makefile +++ b/drivers/clocksource/Makefile @@ -81,6 +81,7 @@ 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-$(CONFIG_STARFIVE_JH7110_TIMER) += timer-jh7110.o obj-$(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-jh7110.c b/drivers/clocksource/timer-jh7110.c new file mode 100644 index 000000000000..b88334a916fb --- /dev/null +++ b/drivers/clocksource/timer-jh7110.c @@ -0,0 +1,485 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Starfive JH7110 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 + +/* Bias: Ch0-0x0, Ch1-0x40, Ch2-0x80, and so on. */ +#define JH7110_TIMER_CH_LEN 0x40 +#define JH7110_TIMER_CH_BASE(x) ((x) * JH7110_TIMER_CH_LEN) + +#define JH7110_CLOCK_SOURCE_RATING 200 +#define JH7110_VALID_BITS 32 +#define JH7110_DELAY_US 0 +#define JH7110_TIMEOUT_US 10000 +#define JH7110_CLOCKEVENT_RATING 300 +#define JH7110_TIMER_MAX_TICKS 0xffffffff +#define JH7110_TIMER_MIN_TICKS 0xf +#define JH7110_TIMER_NAME_NUM 20 + +#define JH7110_TIMER_INT_STATUS 0x00 /* RO[0:4]: Interrupt Status for channel0~4 */ +#define JH7110_TIMER_CTL 0x04 /* RW[0]: 0-continuous run, 1-single run */ +#define JH7110_TIMER_LOAD 0x08 /* RW: load value to counter */ +#define JH7110_TIMER_ENABLE 0x10 /* RW[0]: timer enable register */ +#define JH7110_TIMER_RELOAD 0x14 /* RW: write 1 or 0 both reload counter */ +#define JH7110_TIMER_VALUE 0x18 /* RO: timer value register */ +#define JH7110_TIMER_INT_CLR 0x20 /* RW: timer interrupt clear register */ +#define JH7110_TIMER_INT_MASK 0x24 /* RW[0]: timer interrupt mask register */ +#define JH7110_TIMER_INT_CLR_AVA_MASK BIT(1) + +enum JH7110_TIMER_CH { + JH7110_TIMER_CH_0 = 0, + JH7110_TIMER_CH_1, + JH7110_TIMER_CH_2, + JH7110_TIMER_CH_3, + JH7110_TIMER_CH_MAX +}; + +enum JH7110_TIMER_INTMASK { + JH7110_TIMER_INTMASK_DIS = 0, + JH7110_TIMER_INTMASK_ENA = 1 +}; + +enum JH7110_TIMER_MOD { + JH7110_TIMER_MOD_CONTIN = 0, + JH7110_TIMER_MOD_SINGLE = 1 +}; + +enum JH7110_TIMER_CTL_EN { + JH7110_TIMER_DIS = 0, + JH7110_TIMER_ENA = 1 +}; + +struct jh7110_timer_info { + /* Resgister */ + unsigned int ctrl; + unsigned int load; + unsigned int enable; + unsigned int reload; + unsigned int value; + unsigned int intclr; + unsigned int intmask; + unsigned int channel_base[JH7110_TIMER_CH_MAX]; +}; + +struct jh7110_clkevt { + struct clock_event_device evt; + struct clocksource cs; + struct clk *clk; + char name[JH7110_TIMER_NAME_NUM]; + 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; +}; + +struct jh7110_timer_priv { + struct device *dev; + void __iomem *base; + struct jh7110_clkevt clkevt[JH7110_TIMER_CH_MAX]; +}; + +static const struct jh7110_timer_info jh7110_timer_data = { + .ctrl = JH7110_TIMER_CTL, + .load = JH7110_TIMER_LOAD, + .enable = JH7110_TIMER_ENABLE, + .reload = JH7110_TIMER_RELOAD, + .value = JH7110_TIMER_VALUE, + .intclr = JH7110_TIMER_INT_CLR, + .intmask = JH7110_TIMER_INT_MASK, + .channel_base = {JH7110_TIMER_CH_BASE(JH7110_TIMER_CH_0), + JH7110_TIMER_CH_BASE(JH7110_TIMER_CH_1), + JH7110_TIMER_CH_BASE(JH7110_TIMER_CH_2), + JH7110_TIMER_CH_BASE(JH7110_TIMER_CH_3)}, +}; + +static inline struct jh7110_clkevt *to_jh7110_clkevt(struct clock_event_device *evt) +{ + return container_of(evt, struct jh7110_clkevt, evt); +} + +/* 0:continuous-run mode, 1:single-run mode */ +static inline void jh7110_timer_set_mod(struct jh7110_clkevt *clkevt, int mod) +{ + writel(mod, clkevt->ctrl); +} + +/* Interrupt Mask Register, 0:Unmask, 1:Mask */ +static inline void jh7110_timer_int_enable(struct jh7110_clkevt *clkevt) +{ + writel(JH7110_TIMER_INTMASK_DIS, clkevt->intmask); +} + +static inline void jh7110_timer_int_disable(struct jh7110_clkevt *clkevt) +{ + writel(JH7110_TIMER_INTMASK_ENA, 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 int jh7110_timer_int_clear(struct jh7110_clkevt *clkevt) +{ + u32 value; + int ret; + + /* waiting interrupt can be to clearing */ + ret = readl_poll_timeout_atomic(clkevt->intclr, value, + !(value & JH7110_TIMER_INT_CLR_AVA_MASK), + JH7110_DELAY_US, JH7110_TIMEOUT_US); + if (!ret) + writel(0x1, clkevt->intclr); + + return ret; +} + +/* + * The initial value to be loaded into the + * counter and is also used as the reload value. + * val = clock rate --> 1s + */ +static inline void jh7110_timer_set_load(struct jh7110_clkevt *clkevt, u32 val) +{ + writel(val, clkevt->load); +} + +static inline u32 jh7110_timer_get_val(struct jh7110_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 jh7110_timer_set_reload(struct jh7110_clkevt *clkevt) +{ + writel(0, clkevt->reload); +} + +static inline void jh7110_timer_enable(struct jh7110_clkevt *clkevt) +{ + writel(JH7110_TIMER_ENA, clkevt->enable); +} + +static inline void jh7110_timer_disable(struct jh7110_clkevt *clkevt) +{ + writel(JH7110_TIMER_DIS, clkevt->enable); +} + +static int jh7110_timer_int_init_enable(struct jh7110_clkevt *clkevt) +{ + int ret; + + jh7110_timer_int_disable(clkevt); + ret = jh7110_timer_int_clear(clkevt); + if (ret) + return ret; + + jh7110_timer_int_enable(clkevt); + jh7110_timer_enable(clkevt); + + return 0; +} + +static int jh7110_timer_shutdown(struct clock_event_device *evt) +{ + struct jh7110_clkevt *clkevt = to_jh7110_clkevt(evt); + + jh7110_timer_disable(clkevt); + return jh7110_timer_int_clear(clkevt); +} + +static void jh7110_timer_suspend(struct clock_event_device *evt) +{ + struct jh7110_clkevt *clkevt = to_jh7110_clkevt(evt); + + clkevt->reload_val = jh7110_timer_get_val(clkevt); + jh7110_timer_shutdown(evt); +} + +static void jh7110_timer_resume(struct clock_event_device *evt) +{ + struct jh7110_clkevt *clkevt = to_jh7110_clkevt(evt); + + jh7110_timer_set_load(clkevt, clkevt->reload_val); + jh7110_timer_set_reload(clkevt); + jh7110_timer_int_enable(clkevt); + jh7110_timer_enable(clkevt); +} + +static int jh7110_timer_tick_resume(struct clock_event_device *evt) +{ + jh7110_timer_resume(evt); + + return 0; +} + +static u64 jh7110_timer_clocksource_read(struct clocksource *cs) +{ + struct jh7110_clkevt *clkevt = container_of(cs, struct jh7110_clkevt, cs); + + return (u64)jh7110_timer_get_val(clkevt); +} + +static int jh7110_clocksource_init(struct jh7110_clkevt *clkevt) +{ + int ret; + + jh7110_timer_set_mod(clkevt, JH7110_TIMER_MOD_CONTIN); + jh7110_timer_set_load(clkevt, JH7110_TIMER_MAX_TICKS); + + ret = jh7110_timer_int_init_enable(clkevt); + if (ret) + return ret; + + clkevt->cs.name = clkevt->name; + clkevt->cs.rating = JH7110_CLOCK_SOURCE_RATING; + clkevt->cs.read = jh7110_timer_clocksource_read; + clkevt->cs.mask = CLOCKSOURCE_MASK(JH7110_VALID_BITS); + clkevt->cs.flags = CLOCK_SOURCE_IS_CONTINUOUS; + + return clocksource_register_hz(&clkevt->cs, clkevt->rate); +} + +/* IRQ handler for the timer */ +static irqreturn_t jh7110_timer_interrupt(int irq, void *priv) +{ + struct clock_event_device *evt = (struct clock_event_device *)priv; + struct jh7110_clkevt *clkevt = to_jh7110_clkevt(evt); + + if (jh7110_timer_int_clear(clkevt)) + return IRQ_NONE; + + if (evt->event_handler) + evt->event_handler(evt); + + return IRQ_HANDLED; +} + +static int jh7110_timer_set_periodic(struct clock_event_device *evt) +{ + struct jh7110_clkevt *clkevt = to_jh7110_clkevt(evt); + + clkevt->periodic = DIV_ROUND_CLOSEST(clkevt->rate, HZ); + jh7110_timer_disable(clkevt); + jh7110_timer_set_mod(clkevt, JH7110_TIMER_MOD_CONTIN); + jh7110_timer_set_load(clkevt, clkevt->periodic); + + return jh7110_timer_int_init_enable(clkevt); +} + +static int jh7110_timer_set_oneshot(struct clock_event_device *evt) +{ + struct jh7110_clkevt *clkevt = to_jh7110_clkevt(evt); + + jh7110_timer_disable(clkevt); + jh7110_timer_set_mod(clkevt, JH7110_TIMER_MOD_SINGLE); + jh7110_timer_set_load(clkevt, JH7110_TIMER_MAX_TICKS); + + return jh7110_timer_int_init_enable(clkevt); +} + +static int jh7110_timer_set_next_event(unsigned long next, + struct clock_event_device *evt) +{ + struct jh7110_clkevt *clkevt = to_jh7110_clkevt(evt); + + jh7110_timer_disable(clkevt); + jh7110_timer_set_mod(clkevt, JH7110_TIMER_MOD_SINGLE); + jh7110_timer_set_load(clkevt, next); + jh7110_timer_enable(clkevt); + + return 0; +} + +static void jh7110_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 = jh7110_timer_shutdown; + evt->set_state_periodic = jh7110_timer_set_periodic; + evt->set_state_oneshot = jh7110_timer_set_oneshot; + evt->set_state_oneshot_stopped = jh7110_timer_shutdown; + evt->tick_resume = jh7110_timer_tick_resume; + evt->set_next_event = jh7110_timer_set_next_event; + evt->suspend = jh7110_timer_suspend; + evt->resume = jh7110_timer_resume; + evt->rating = JH7110_CLOCKEVENT_RATING; +} + +static void jh7110_clockevents_register(struct jh7110_clkevt *clkevt) +{ + clkevt->rate = clk_get_rate(clkevt->clk); + + jh7110_set_clockevent(&clkevt->evt); + clkevt->evt.name = clkevt->name; + clkevt->evt.irq = clkevt->irq; + clkevt->evt.cpumask = cpu_possible_mask; + + clockevents_config_and_register(&clkevt->evt, clkevt->rate, + JH7110_TIMER_MIN_TICKS, JH7110_TIMER_MAX_TICKS); +} + +static void jh7110_clkevt_base_init(const struct jh7110_timer_info *data, + struct jh7110_clkevt *clkevt, + void __iomem *base, int ch) +{ + void __iomem *channel_base; + + channel_base = base + data->channel_base[ch]; + clkevt->base = channel_base; + clkevt->ctrl = channel_base + data->ctrl; + clkevt->load = channel_base + data->load; + clkevt->enable = channel_base + data->enable; + clkevt->reload = channel_base + data->reload; + clkevt->value = channel_base + data->value; + clkevt->intclr = channel_base + data->intclr; + clkevt->intmask = channel_base + data->intmask; +} + +static int jh7110_timer_probe(struct platform_device *pdev) +{ + const struct jh7110_timer_info *data = of_device_get_match_data(&pdev->dev); + char name[JH7110_TIMER_NAME_NUM]; + struct jh7110_timer_priv *priv; + struct jh7110_clkevt *clkevt; + struct clk *pclk; + struct reset_control *rst; + int ch; + int ret; + + if (!data) + return -ENOENT; + + priv = devm_kzalloc(&pdev->dev, struct_size(priv, clkevt, JH7110_TIMER_CH_MAX), + GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(priv->base)) + return dev_err_probe(&pdev->dev, PTR_ERR(priv->base), + "failed to map registers\n"); + + rst = devm_reset_control_get_exclusive(&pdev->dev, "apb"); + if (IS_ERR(rst)) + return dev_err_probe(&pdev->dev, PTR_ERR(rst), "failed to get apb reset\n"); + + pclk = devm_clk_get_enabled(&pdev->dev, "apb"); + if (IS_ERR(pclk)) + return dev_err_probe(&pdev->dev, PTR_ERR(pclk), + "failed to get & enable apb clock\n"); + + ret = reset_control_deassert(rst); + if (ret) + goto err; + + priv->dev = &pdev->dev; + platform_set_drvdata(pdev, priv); + + for (ch = 0; ch < JH7110_TIMER_CH_MAX; ch++) { + clkevt = &priv->clkevt[ch]; + snprintf(name, sizeof(name), "ch%d", ch); + + jh7110_clkevt_base_init(data, clkevt, priv->base, ch); + /* Ensure timers are disabled */ + jh7110_timer_disable(clkevt); + + rst = devm_reset_control_get_exclusive(&pdev->dev, name); + if (IS_ERR(rst)) { + ret = PTR_ERR(rst); + goto err; + } + + clkevt->clk = devm_clk_get_enabled(&pdev->dev, name); + if (IS_ERR(clkevt->clk)) { + ret = PTR_ERR(clkevt->clk); + goto err; + } + + ret = reset_control_deassert(rst); + if (ret) + goto ch_err; + + clkevt->irq = platform_get_irq(pdev, ch); + if (clkevt->irq < 0) { + ret = clkevt->irq; + goto ch_err; + } + + snprintf(clkevt->name, sizeof(clkevt->name), "%s.ch%d", pdev->name, ch); + jh7110_clockevents_register(clkevt); + + ret = devm_request_irq(&pdev->dev, clkevt->irq, jh7110_timer_interrupt, + IRQF_TIMER | IRQF_IRQPOLL, + clkevt->name, &clkevt->evt); + if (ret) + goto ch_err; + + ret = jh7110_clocksource_init(clkevt); + if (ret) + goto ch_err; + } + + return 0; + +ch_err: + for (; ch < 0; ch--) + clk_disable_unprepare(priv->clkevt[ch].clk); +err: + clk_disable_unprepare(pclk); + + return ret; +} + +static const struct of_device_id jh7110_timer_match[] = { + { .compatible = "starfive,jh7110-timer", .data = &jh7110_timer_data }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, jh7110_timer_match); + +static struct platform_driver jh7110_timer_driver = { + .probe = jh7110_timer_probe, + .driver = { + .name = "jh7110-timer", + .of_match_table = jh7110_timer_match, + }, +}; +module_platform_driver(jh7110_timer_driver); + +MODULE_AUTHOR("Xingyu Wu "); +MODULE_DESCRIPTION("StarFive JH7110 timer driver"); +MODULE_LICENSE("GPL"); From patchwork Tue Jun 27 05:53:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xingyu Wu X-Patchwork-Id: 13294011 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 8DF5EEB64DD for ; Tue, 27 Jun 2023 05:54:00 +0000 (UTC) DKIM-Signature: v=1; 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Tue, 27 Jun 2023 05:53:54 +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 08CEE8062; Tue, 27 Jun 2023 13:53:17 +0800 (CST) Received: from EXMBX061.cuchost.com (172.16.6.61) by EXMBX165.cuchost.com (172.16.6.75) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Tue, 27 Jun 2023 13:53:16 +0800 Received: from localhost.localdomain (183.27.97.206) by EXMBX061.cuchost.com (172.16.6.61) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Tue, 27 Jun 2023 13:53:16 +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 , , Conor Dooley Subject: [PATCH v3 3/3] riscv: dts: jh7110: starfive: Add timer node Date: Tue, 27 Jun 2023 13:53:13 +0800 Message-ID: <20230627055313.252519-4-xingyu.wu@starfivetech.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230627055313.252519-1-xingyu.wu@starfivetech.com> References: <20230627055313.252519-1-xingyu.wu@starfivetech.com> MIME-Version: 1.0 X-Originating-IP: [183.27.97.206] X-ClientProxiedBy: EXCAS066.cuchost.com (172.16.6.26) To EXMBX061.cuchost.com (172.16.6.61) X-YovoleRuleAgent: yovoleflag X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230626_225352_866483_34CCF3FD X-CRM114-Status: UNSURE ( 9.97 ) X-CRM114-Notice: Please train this message. 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 | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/arch/riscv/boot/dts/starfive/jh7110.dtsi b/arch/riscv/boot/dts/starfive/jh7110.dtsi index 4c5fdb905da8..587aa6830c4b 100644 --- a/arch/riscv/boot/dts/starfive/jh7110.dtsi +++ b/arch/riscv/boot/dts/starfive/jh7110.dtsi @@ -469,6 +469,26 @@ #gpio-cells = <2>; }; + timer@13050000 { + compatible = "starfive,jh7110-timer"; + reg = <0x0 0x13050000 0x0 0x10000>; + interrupts = <69>, <70>, <71> ,<72>; + clocks = <&syscrg JH7110_SYSCLK_TIMER_APB>, + <&syscrg JH7110_SYSCLK_TIMER0>, + <&syscrg JH7110_SYSCLK_TIMER1>, + <&syscrg JH7110_SYSCLK_TIMER2>, + <&syscrg JH7110_SYSCLK_TIMER3>; + clock-names = "apb", "ch0", "ch1", + "ch2", "ch3"; + resets = <&syscrg JH7110_SYSRST_TIMER_APB>, + <&syscrg JH7110_SYSRST_TIMER0>, + <&syscrg JH7110_SYSRST_TIMER1>, + <&syscrg JH7110_SYSRST_TIMER2>, + <&syscrg JH7110_SYSRST_TIMER3>; + reset-names = "apb", "ch0", "ch1", + "ch2", "ch3"; + }; + aoncrg: clock-controller@17000000 { compatible = "starfive,jh7110-aoncrg"; reg = <0x0 0x17000000 0x0 0x10000>;