diff options
Diffstat (limited to 'drivers/clocksource')
30 files changed, 194 insertions, 277 deletions
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index 48321488f0fd..3300739edce4 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only menu "Clock Source drivers" depends on GENERIC_CLOCKEVENTS @@ -387,7 +388,7 @@ config ARM_GLOBAL_TIMER This options enables support for the ARM global timer unit config ARM_TIMER_SP804 - bool "Support for Dual Timer SP804 module" + bool "Support for Dual Timer SP804 module" if COMPILE_TEST depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP select CLKSRC_MMIO select TIMER_OF if OF @@ -407,8 +408,11 @@ config ARMV7M_SYSTICK This options enables support for the ARMv7M system timer unit config ATMEL_PIT + bool "Atmel PIT support" if COMPILE_TEST + depends on HAS_IOMEM select TIMER_OF if OF - def_bool SOC_AT91SAM9 || SOC_SAMA5 + help + Support for the Periodic Interval Timer found on Atmel SoCs. config ATMEL_ST bool "Atmel ST timer support" if COMPILE_TEST @@ -418,6 +422,13 @@ config ATMEL_ST help Support for the Atmel ST timer. +config ATMEL_TCB_CLKSRC + bool "Atmel TC Block timer driver" if COMPILE_TEST + depends on HAS_IOMEM + select TIMER_OF if OF + help + Support for Timer Counter Blocks on Atmel SoCs. + config CLKSRC_EXYNOS_MCT bool "Exynos multi core timer driver" if COMPILE_TEST depends on ARM || ARM64 diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile index dba4eff880de..236858fa7fbf 100644 --- a/drivers/clocksource/Makefile +++ b/drivers/clocksource/Makefile @@ -3,7 +3,7 @@ obj-$(CONFIG_TIMER_OF) += timer-of.o obj-$(CONFIG_TIMER_PROBE) += timer-probe.o obj-$(CONFIG_ATMEL_PIT) += timer-atmel-pit.o obj-$(CONFIG_ATMEL_ST) += timer-atmel-st.o -obj-$(CONFIG_ATMEL_TCB_CLKSRC) += tcb_clksrc.o +obj-$(CONFIG_ATMEL_TCB_CLKSRC) += timer-atmel-tcb.o obj-$(CONFIG_X86_PM_TIMER) += acpi_pm.o obj-$(CONFIG_SCx200HR_TIMER) += scx200_hrt.o obj-$(CONFIG_CS5535_CLOCK_EVENT_SRC) += timer-cs5535.o diff --git a/drivers/clocksource/armv7m_systick.c b/drivers/clocksource/armv7m_systick.c index ac046d6fb0bf..7e78074480e4 100644 --- a/drivers/clocksource/armv7m_systick.c +++ b/drivers/clocksource/armv7m_systick.c @@ -1,7 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) Maxime Coquelin 2015 * Author: Maxime Coquelin <mcoquelin.stm32@gmail.com> - * License terms: GNU General Public License (GPL), version 2 */ #include <linux/kernel.h> diff --git a/drivers/clocksource/asm9260_timer.c b/drivers/clocksource/asm9260_timer.c index fbaee04fd1d9..9f09a59161e7 100644 --- a/drivers/clocksource/asm9260_timer.c +++ b/drivers/clocksource/asm9260_timer.c @@ -1,10 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2014 Oleksij Rempel <linux@rempel-privat.de> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. */ #include <linux/kernel.h> diff --git a/drivers/clocksource/clksrc-dbx500-prcmu.c b/drivers/clocksource/clksrc-dbx500-prcmu.c index 51d53c4e646f..996900d017c6 100644 --- a/drivers/clocksource/clksrc-dbx500-prcmu.c +++ b/drivers/clocksource/clksrc-dbx500-prcmu.c @@ -1,7 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) ST-Ericsson SA 2011 * - * License Terms: GNU General Public License v2 * Author: Mattias Wallin <mattias.wallin@stericsson.com> for ST-Ericsson * Author: Sundar Iyer for ST-Ericsson * sched_clock implementation is based on: diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clksrc_st_lpc.c index a1d01ebb81f5..419a886876e4 100644 --- a/drivers/clocksource/clksrc_st_lpc.c +++ b/drivers/clocksource/clksrc_st_lpc.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Clocksource using the Low Power Timer found in the Low Power Controller (LPC) * @@ -5,11 +6,6 @@ * * Author(s): Francesco Virlinzi <francesco.virlinzi@st.com> * Ajit Pal Singh <ajitpal.singh@st.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. */ #include <linux/clk.h> diff --git a/drivers/clocksource/clps711x-timer.c b/drivers/clocksource/clps711x-timer.c index 857f8c086274..e95fdc49c226 100644 --- a/drivers/clocksource/clps711x-timer.c +++ b/drivers/clocksource/clps711x-timer.c @@ -1,12 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Cirrus Logic CLPS711X clocksource driver * * Copyright (C) 2014 Alexander Shiyan <shc_work@mail.ru> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. */ #include <linux/clk.h> diff --git a/drivers/clocksource/em_sti.c b/drivers/clocksource/em_sti.c index 269db74a0658..8e12b11e81b0 100644 --- a/drivers/clocksource/em_sti.c +++ b/drivers/clocksource/em_sti.c @@ -1,20 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Emma Mobile Timer Support - STI * * Copyright (C) 2012 Magnus Damm - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/init.h> diff --git a/drivers/clocksource/scx200_hrt.c b/drivers/clocksource/scx200_hrt.c index a46660bf6588..c3536fffbe9a 100644 --- a/drivers/clocksource/scx200_hrt.c +++ b/drivers/clocksource/scx200_hrt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2006 Jim Cromie * @@ -9,11 +10,6 @@ * over timekeeping duties. * * Based on work by John Stultz, and Ted Phelps (in a 2.6.12-rc6 patch) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or (at your option) any later version. */ #include <linux/clocksource.h> diff --git a/drivers/clocksource/timer-atlas7.c b/drivers/clocksource/timer-atlas7.c index 62c4bbc55a7e..93c3ac6d72bd 100644 --- a/drivers/clocksource/timer-atlas7.c +++ b/drivers/clocksource/timer-atlas7.c @@ -1,9 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * System timer for CSR SiRFprimaII * * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company. - * - * Licensed under GPLv2 or later. */ #include <linux/kernel.h> diff --git a/drivers/clocksource/timer-atmel-st.c b/drivers/clocksource/timer-atmel-st.c index d2e660f475af..ab0aabfae5f0 100644 --- a/drivers/clocksource/timer-atmel-st.c +++ b/drivers/clocksource/timer-atmel-st.c @@ -1,22 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * linux/arch/arm/mach-at91/at91rm9200_time.c * * Copyright (C) 2003 SAN People * Copyright (C) 2003 ATMEL - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/kernel.h> diff --git a/drivers/clocksource/tcb_clksrc.c b/drivers/clocksource/timer-atmel-tcb.c index f987027ca566..6ed31f9def7e 100644 --- a/drivers/clocksource/tcb_clksrc.c +++ b/drivers/clocksource/timer-atmel-tcb.c @@ -9,9 +9,11 @@ #include <linux/err.h> #include <linux/ioport.h> #include <linux/io.h> -#include <linux/platform_device.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/sched_clock.h> #include <linux/syscore_ops.h> -#include <linux/atmel_tc.h> +#include <soc/at91/atmel_tcb.h> /* @@ -28,13 +30,6 @@ * source, used in either periodic or oneshot mode. This runs * at 32 KiHZ, and can handle delays of up to two seconds. * - * A boot clocksource and clockevent source are also currently needed, - * unless the relevant platforms (ARM/AT91, AVR32/AT32) are changed so - * this code can be used when init_timers() is called, well before most - * devices are set up. (Some low end AT91 parts, which can run uClinux, - * have only the timers in one TC block... they currently don't support - * the tclib code, because of that initialization issue.) - * * REVISIT behavior during system suspend states... we should disable * all clocks and save the power. Easily done for clockevent devices, * but clocksources won't necessarily get the needed notifications. @@ -112,7 +107,6 @@ static void tc_clksrc_resume(struct clocksource *cs) } static struct clocksource clksrc = { - .name = "tcb_clksrc", .rating = 200, .read = tc_get_cycles, .mask = CLOCKSOURCE_MASK(32), @@ -121,6 +115,16 @@ static struct clocksource clksrc = { .resume = tc_clksrc_resume, }; +static u64 notrace tc_sched_clock_read(void) +{ + return tc_get_cycles(&clksrc); +} + +static u64 notrace tc_sched_clock_read32(void) +{ + return tc_get_cycles32(&clksrc); +} + #ifdef CONFIG_GENERIC_CLOCKEVENTS struct tc_clkevt_device { @@ -214,7 +218,6 @@ static int tc_next_event(unsigned long delta, struct clock_event_device *d) static struct tc_clkevt_device clkevt = { .clkevt = { - .name = "tc_clkevt", .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, /* Should be lower than at91rm9200's system timer */ @@ -330,39 +333,74 @@ static void __init tcb_setup_single_chan(struct atmel_tc *tc, int mck_divisor_id writel(ATMEL_TC_SYNC, tcaddr + ATMEL_TC_BCR); } -static int __init tcb_clksrc_init(void) -{ - static char bootinfo[] __initdata - = KERN_DEBUG "%s: tc%d at %d.%03d MHz\n"; +static const u8 atmel_tcb_divisors[5] = { 2, 8, 32, 128, 0, }; + +static const struct of_device_id atmel_tcb_of_match[] = { + { .compatible = "atmel,at91rm9200-tcb", .data = (void *)16, }, + { .compatible = "atmel,at91sam9x5-tcb", .data = (void *)32, }, + { /* sentinel */ } +}; - struct platform_device *pdev; - struct atmel_tc *tc; +static int __init tcb_clksrc_init(struct device_node *node) +{ + struct atmel_tc tc; struct clk *t0_clk; + const struct of_device_id *match; + u64 (*tc_sched_clock)(void); u32 rate, divided_rate = 0; int best_divisor_idx = -1; int clk32k_divisor_idx = -1; + int bits; int i; int ret; - tc = atmel_tc_alloc(CONFIG_ATMEL_TCB_CLKSRC_BLOCK); - if (!tc) { - pr_debug("can't alloc TC for clocksource\n"); - return -ENODEV; + /* Protect against multiple calls */ + if (tcaddr) + return 0; + + tc.regs = of_iomap(node->parent, 0); + if (!tc.regs) + return -ENXIO; + + t0_clk = of_clk_get_by_name(node->parent, "t0_clk"); + if (IS_ERR(t0_clk)) + return PTR_ERR(t0_clk); + + tc.slow_clk = of_clk_get_by_name(node->parent, "slow_clk"); + if (IS_ERR(tc.slow_clk)) + return PTR_ERR(tc.slow_clk); + + tc.clk[0] = t0_clk; + tc.clk[1] = of_clk_get_by_name(node->parent, "t1_clk"); + if (IS_ERR(tc.clk[1])) + tc.clk[1] = t0_clk; + tc.clk[2] = of_clk_get_by_name(node->parent, "t2_clk"); + if (IS_ERR(tc.clk[2])) + tc.clk[2] = t0_clk; + + tc.irq[2] = of_irq_get(node->parent, 2); + if (tc.irq[2] <= 0) { + tc.irq[2] = of_irq_get(node->parent, 0); + if (tc.irq[2] <= 0) + return -EINVAL; } - tcaddr = tc->regs; - pdev = tc->pdev; - t0_clk = tc->clk[0]; + match = of_match_node(atmel_tcb_of_match, node->parent); + bits = (uintptr_t)match->data; + + for (i = 0; i < ARRAY_SIZE(tc.irq); i++) + writel(ATMEL_TC_ALL_IRQ, tc.regs + ATMEL_TC_REG(i, IDR)); + ret = clk_prepare_enable(t0_clk); if (ret) { pr_debug("can't enable T0 clk\n"); - goto err_free_tc; + return ret; } /* How fast will we be counting? Pick something over 5 MHz. */ rate = (u32) clk_get_rate(t0_clk); - for (i = 0; i < 5; i++) { - unsigned divisor = atmel_tc_divisors[i]; + for (i = 0; i < ARRAY_SIZE(atmel_tcb_divisors); i++) { + unsigned divisor = atmel_tcb_divisors[i]; unsigned tmp; /* remember 32 KiHz clock for later */ @@ -381,27 +419,31 @@ static int __init tcb_clksrc_init(void) best_divisor_idx = i; } - - printk(bootinfo, clksrc.name, CONFIG_ATMEL_TCB_CLKSRC_BLOCK, - divided_rate / 1000000, + clksrc.name = kbasename(node->parent->full_name); + clkevt.clkevt.name = kbasename(node->parent->full_name); + pr_debug("%s at %d.%03d MHz\n", clksrc.name, divided_rate / 1000000, ((divided_rate % 1000000) + 500) / 1000); - if (tc->tcb_config && tc->tcb_config->counter_width == 32) { + tcaddr = tc.regs; + + if (bits == 32) { /* use apropriate function to read 32 bit counter */ clksrc.read = tc_get_cycles32; /* setup ony channel 0 */ - tcb_setup_single_chan(tc, best_divisor_idx); + tcb_setup_single_chan(&tc, best_divisor_idx); + tc_sched_clock = tc_sched_clock_read32; } else { - /* tclib will give us three clocks no matter what the + /* we have three clocks no matter what the * underlying platform supports. */ - ret = clk_prepare_enable(tc->clk[1]); + ret = clk_prepare_enable(tc.clk[1]); if (ret) { pr_debug("can't enable T1 clk\n"); goto err_disable_t0; } /* setup both channel 0 & 1 */ - tcb_setup_dual_chan(tc, best_divisor_idx); + tcb_setup_dual_chan(&tc, best_divisor_idx); + tc_sched_clock = tc_sched_clock_read; } /* and away we go! */ @@ -410,24 +452,26 @@ static int __init tcb_clksrc_init(void) goto err_disable_t1; /* channel 2: periodic and oneshot timer support */ - ret = setup_clkevents(tc, clk32k_divisor_idx); + ret = setup_clkevents(&tc, clk32k_divisor_idx); if (ret) goto err_unregister_clksrc; + sched_clock_register(tc_sched_clock, 32, divided_rate); + return 0; err_unregister_clksrc: clocksource_unregister(&clksrc); err_disable_t1: - if (!tc->tcb_config || tc->tcb_config->counter_width != 32) - clk_disable_unprepare(tc->clk[1]); + if (bits != 32) + clk_disable_unprepare(tc.clk[1]); err_disable_t0: clk_disable_unprepare(t0_clk); -err_free_tc: - atmel_tc_free(tc); + tcaddr = NULL; + return ret; } -arch_initcall(tcb_clksrc_init); +TIMER_OF_DECLARE(atmel_tcb_clksrc, "atmel,tcb-timer", tcb_clksrc_init); diff --git a/drivers/clocksource/timer-cs5535.c b/drivers/clocksource/timer-cs5535.c index 1de8cac99a0e..8f6bc536bef2 100644 --- a/drivers/clocksource/timer-cs5535.c +++ b/drivers/clocksource/timer-cs5535.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Clock event driver for the CS5535/CS5536 * @@ -5,10 +6,6 @@ * Copyright (C) 2007 Andres Salomon <dilinger@debian.org> * Copyright (C) 2009 Andres Salomon <dilinger@collabora.co.uk> * - * This program is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public License - * as published by the Free Software Foundation. - * * The MFGPTs are documented in AMD Geode CS5536 Companion Device Data Book. */ diff --git a/drivers/clocksource/timer-fsl-ftm.c b/drivers/clocksource/timer-fsl-ftm.c index e1c34b2f53a5..a9d9a3ca5996 100644 --- a/drivers/clocksource/timer-fsl-ftm.c +++ b/drivers/clocksource/timer-fsl-ftm.c @@ -1,12 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Freescale FlexTimer Module (FTM) timer driver. * * Copyright 2014 Freescale Semiconductor, Inc. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. */ #include <linux/clk.h> diff --git a/drivers/clocksource/timer-integrator-ap.c b/drivers/clocksource/timer-integrator-ap.c index 19fb7de4b928..c90a69c7b5fa 100644 --- a/drivers/clocksource/timer-integrator-ap.c +++ b/drivers/clocksource/timer-integrator-ap.c @@ -1,21 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Integrator/AP timer driver * Copyright (C) 2000-2003 Deep Blue Solutions Ltd * Copyright (c) 2014, Linaro Limited - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/clk.h> diff --git a/drivers/clocksource/timer-mediatek.c b/drivers/clocksource/timer-mediatek.c index eb10321f8517..a562f491b0f8 100644 --- a/drivers/clocksource/timer-mediatek.c +++ b/drivers/clocksource/timer-mediatek.c @@ -1,19 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Mediatek SoCs General-Purpose Timer handling. * * Copyright (C) 2014 Matthias Brugger * * Matthias Brugger <matthias.bgg@gmail.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/clocksource/timer-milbeaut.c b/drivers/clocksource/timer-milbeaut.c index f2019a88e3ee..fa9fb4eacade 100644 --- a/drivers/clocksource/timer-milbeaut.c +++ b/drivers/clocksource/timer-milbeaut.c @@ -26,8 +26,8 @@ #define MLB_TMR_TMCSR_CSL_DIV2 0 #define MLB_TMR_DIV_CNT 2 -#define MLB_TMR_SRC_CH (1) -#define MLB_TMR_EVT_CH (0) +#define MLB_TMR_SRC_CH 1 +#define MLB_TMR_EVT_CH 0 #define MLB_TMR_SRC_CH_OFS (MLB_TMR_REGSZPCH * MLB_TMR_SRC_CH) #define MLB_TMR_EVT_CH_OFS (MLB_TMR_REGSZPCH * MLB_TMR_EVT_CH) @@ -43,6 +43,8 @@ #define MLB_TMR_EVT_TMRLR2_OFS (MLB_TMR_EVT_CH_OFS + MLB_TMR_TMRLR2_OFS) #define MLB_TIMER_RATING 500 +#define MLB_TIMER_ONESHOT 0 +#define MLB_TIMER_PERIODIC 1 static irqreturn_t mlb_timer_interrupt(int irq, void *dev_id) { @@ -59,27 +61,53 @@ static irqreturn_t mlb_timer_interrupt(int irq, void *dev_id) return IRQ_HANDLED; } -static int mlb_set_state_periodic(struct clock_event_device *clk) +static void mlb_evt_timer_start(struct timer_of *to, bool periodic) { - struct timer_of *to = to_timer_of(clk); u32 val = MLB_TMR_TMCSR_CSL_DIV2; + val |= MLB_TMR_TMCSR_CNTE | MLB_TMR_TMCSR_TRG | MLB_TMR_TMCSR_INTE; + if (periodic) + val |= MLB_TMR_TMCSR_RELD; writel_relaxed(val, timer_of_base(to) + MLB_TMR_EVT_TMCSR_OFS); +} - writel_relaxed(to->of_clk.period, timer_of_base(to) + - MLB_TMR_EVT_TMRLR1_OFS); - val |= MLB_TMR_TMCSR_RELD | MLB_TMR_TMCSR_CNTE | - MLB_TMR_TMCSR_TRG | MLB_TMR_TMCSR_INTE; +static void mlb_evt_timer_stop(struct timer_of *to) +{ + u32 val = readl_relaxed(timer_of_base(to) + MLB_TMR_EVT_TMCSR_OFS); + + val &= ~MLB_TMR_TMCSR_CNTE; writel_relaxed(val, timer_of_base(to) + MLB_TMR_EVT_TMCSR_OFS); +} + +static void mlb_evt_timer_register_count(struct timer_of *to, unsigned long cnt) +{ + writel_relaxed(cnt, timer_of_base(to) + MLB_TMR_EVT_TMRLR1_OFS); +} + +static int mlb_set_state_periodic(struct clock_event_device *clk) +{ + struct timer_of *to = to_timer_of(clk); + + mlb_evt_timer_stop(to); + mlb_evt_timer_register_count(to, to->of_clk.period); + mlb_evt_timer_start(to, MLB_TIMER_PERIODIC); return 0; } static int mlb_set_state_oneshot(struct clock_event_device *clk) { struct timer_of *to = to_timer_of(clk); - u32 val = MLB_TMR_TMCSR_CSL_DIV2; - writel_relaxed(val, timer_of_base(to) + MLB_TMR_EVT_TMCSR_OFS); + mlb_evt_timer_stop(to); + mlb_evt_timer_start(to, MLB_TIMER_ONESHOT); + return 0; +} + +static int mlb_set_state_shutdown(struct clock_event_device *clk) +{ + struct timer_of *to = to_timer_of(clk); + + mlb_evt_timer_stop(to); return 0; } @@ -88,22 +116,21 @@ static int mlb_clkevt_next_event(unsigned long event, { struct timer_of *to = to_timer_of(clk); - writel_relaxed(event, timer_of_base(to) + MLB_TMR_EVT_TMRLR1_OFS); - writel_relaxed(MLB_TMR_TMCSR_CSL_DIV2 | - MLB_TMR_TMCSR_CNTE | MLB_TMR_TMCSR_INTE | - MLB_TMR_TMCSR_TRG, timer_of_base(to) + - MLB_TMR_EVT_TMCSR_OFS); + mlb_evt_timer_stop(to); + mlb_evt_timer_register_count(to, event); + mlb_evt_timer_start(to, MLB_TIMER_ONESHOT); return 0; } static int mlb_config_clock_source(struct timer_of *to) { - writel_relaxed(0, timer_of_base(to) + MLB_TMR_SRC_TMCSR_OFS); - writel_relaxed(~0, timer_of_base(to) + MLB_TMR_SRC_TMR_OFS); + u32 val = MLB_TMR_TMCSR_CSL_DIV2; + + writel_relaxed(val, timer_of_base(to) + MLB_TMR_SRC_TMCSR_OFS); writel_relaxed(~0, timer_of_base(to) + MLB_TMR_SRC_TMRLR1_OFS); writel_relaxed(~0, timer_of_base(to) + MLB_TMR_SRC_TMRLR2_OFS); - writel_relaxed(BIT(4) | BIT(1) | BIT(0), timer_of_base(to) + - MLB_TMR_SRC_TMCSR_OFS); + val |= MLB_TMR_TMCSR_RELD | MLB_TMR_TMCSR_CNTE | MLB_TMR_TMCSR_TRG; + writel_relaxed(val, timer_of_base(to) + MLB_TMR_SRC_TMCSR_OFS); return 0; } @@ -123,6 +150,7 @@ static struct timer_of to = { .features = CLOCK_EVT_FEAT_DYNIRQ | CLOCK_EVT_FEAT_ONESHOT, .set_state_oneshot = mlb_set_state_oneshot, .set_state_periodic = mlb_set_state_periodic, + .set_state_shutdown = mlb_set_state_shutdown, .set_next_event = mlb_clkevt_next_event, }, diff --git a/drivers/clocksource/timer-of.c b/drivers/clocksource/timer-of.c index 06ed88a2a8a0..80542289fae7 100644 --- a/drivers/clocksource/timer-of.c +++ b/drivers/clocksource/timer-of.c @@ -1,19 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2017, Linaro Ltd. All rights reserved. * * Author: Daniel Lezcano <daniel.lezcano@linaro.org> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include <linux/clk.h> #include <linux/interrupt.h> diff --git a/drivers/clocksource/timer-owl.c b/drivers/clocksource/timer-owl.c index ea00a5e8f95d..900fe736145d 100644 --- a/drivers/clocksource/timer-owl.c +++ b/drivers/clocksource/timer-owl.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Actions Semi Owl timer * @@ -6,11 +7,6 @@ * * Copyright (c) 2017 SUSE Linux GmbH * Author: Andreas Färber - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. */ #include <linux/clk.h> diff --git a/drivers/clocksource/timer-oxnas-rps.c b/drivers/clocksource/timer-oxnas-rps.c index 30c6f4ce672b..56c0cc32d0ac 100644 --- a/drivers/clocksource/timer-oxnas-rps.c +++ b/drivers/clocksource/timer-oxnas-rps.c @@ -1,21 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * drivers/clocksource/timer-oxnas-rps.c * * Copyright (C) 2009 Oxford Semiconductor Ltd * Copyright (C) 2013 Ma Haijun <mahaijuns@gmail.com> * Copyright (C) 2016 Neil Armstrong <narmstrong@baylibre.com> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/clocksource/timer-prima2.c b/drivers/clocksource/timer-prima2.c index 20ff33b698df..d4a9dcf5fba2 100644 --- a/drivers/clocksource/timer-prima2.c +++ b/drivers/clocksource/timer-prima2.c @@ -1,9 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * System timer for CSR SiRFprimaII * * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company. - * - * Licensed under GPLv2 or later. */ #include <linux/kernel.h> diff --git a/drivers/clocksource/timer-probe.c b/drivers/clocksource/timer-probe.c index 028075720334..dda1946e84dd 100644 --- a/drivers/clocksource/timer-probe.c +++ b/drivers/clocksource/timer-probe.c @@ -1,17 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include <linux/acpi.h> diff --git a/drivers/clocksource/timer-sp804.c b/drivers/clocksource/timer-sp804.c index 052b230ca312..9c841980eed1 100644 --- a/drivers/clocksource/timer-sp804.c +++ b/drivers/clocksource/timer-sp804.c @@ -1,22 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * linux/drivers/clocksource/timer-sp.c * * Copyright (C) 1999 - 2003 ARM Limited * Copyright (C) 2000 Deep Blue Solutions Ltd - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/clk.h> #include <linux/clocksource.h> diff --git a/drivers/clocksource/timer-stm32.c b/drivers/clocksource/timer-stm32.c index 2717f88c7904..c9a753f96ba1 100644 --- a/drivers/clocksource/timer-stm32.c +++ b/drivers/clocksource/timer-stm32.c @@ -1,7 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) Maxime Coquelin 2015 * Author: Maxime Coquelin <mcoquelin.stm32@gmail.com> - * License terms: GNU General Public License (GPL), version 2 * * Inspired by time-efm32.c from Uwe Kleine-Koenig */ diff --git a/drivers/clocksource/timer-sun4i.c b/drivers/clocksource/timer-sun4i.c index 6e0180aaf784..65f38f6ca714 100644 --- a/drivers/clocksource/timer-sun4i.c +++ b/drivers/clocksource/timer-sun4i.c @@ -186,7 +186,8 @@ static int __init sun4i_timer_init(struct device_node *node) */ if (of_machine_is_compatible("allwinner,sun4i-a10") || of_machine_is_compatible("allwinner,sun5i-a13") || - of_machine_is_compatible("allwinner,sun5i-a10s")) + of_machine_is_compatible("allwinner,sun5i-a10s") || + of_machine_is_compatible("allwinner,suniv-f1c100s")) sched_clock_register(sun4i_timer_sched_read, 32, timer_of_rate(&to)); @@ -218,3 +219,5 @@ static int __init sun4i_timer_init(struct device_node *node) } TIMER_OF_DECLARE(sun4i, "allwinner,sun4i-a10-timer", sun4i_timer_init); +TIMER_OF_DECLARE(suniv, "allwinner,suniv-f1c100s-timer", + sun4i_timer_init); diff --git a/drivers/clocksource/timer-tegra20.c b/drivers/clocksource/timer-tegra20.c index fdb3d795a409..919b3568c495 100644 --- a/drivers/clocksource/timer-tegra20.c +++ b/drivers/clocksource/timer-tegra20.c @@ -60,9 +60,6 @@ static u32 usec_config; static void __iomem *timer_reg_base; #ifdef CONFIG_ARM -static void __iomem *rtc_base; -static struct timespec64 persistent_ts; -static u64 persistent_ms, last_persistent_ms; static struct delay_timer tegra_delay_timer; #endif @@ -199,40 +196,30 @@ static unsigned long tegra_delay_timer_read_counter_long(void) return readl(timer_reg_base + TIMERUS_CNTR_1US); } +static struct timer_of suspend_rtc_to = { + .flags = TIMER_OF_BASE | TIMER_OF_CLOCK, +}; + /* * tegra_rtc_read - Reads the Tegra RTC registers * Care must be taken that this funciton is not called while the * tegra_rtc driver could be executing to avoid race conditions * on the RTC shadow register */ -static u64 tegra_rtc_read_ms(void) +static u64 tegra_rtc_read_ms(struct clocksource *cs) { - u32 ms = readl(rtc_base + RTC_MILLISECONDS); - u32 s = readl(rtc_base + RTC_SHADOW_SECONDS); + u32 ms = readl(timer_of_base(&suspend_rtc_to) + RTC_MILLISECONDS); + u32 s = readl(timer_of_base(&suspend_rtc_to) + RTC_SHADOW_SECONDS); return (u64)s * MSEC_PER_SEC + ms; } -/* - * tegra_read_persistent_clock64 - Return time from a persistent clock. - * - * Reads the time from a source which isn't disabled during PM, the - * 32k sync timer. Convert the cycles elapsed since last read into - * nsecs and adds to a monotonically increasing timespec64. - * Care must be taken that this funciton is not called while the - * tegra_rtc driver could be executing to avoid race conditions - * on the RTC shadow register - */ -static void tegra_read_persistent_clock64(struct timespec64 *ts) -{ - u64 delta; - - last_persistent_ms = persistent_ms; - persistent_ms = tegra_rtc_read_ms(); - delta = persistent_ms - last_persistent_ms; - - timespec64_add_ns(&persistent_ts, delta * NSEC_PER_MSEC); - *ts = persistent_ts; -} +static struct clocksource suspend_rtc_clocksource = { + .name = "tegra_suspend_timer", + .rating = 200, + .read = tegra_rtc_read_ms, + .mask = CLOCKSOURCE_MASK(32), + .flags = CLOCK_SOURCE_IS_CONTINUOUS | CLOCK_SOURCE_SUSPEND_NONSTOP, +}; #endif static int tegra_timer_common_init(struct device_node *np, struct timer_of *to) @@ -385,25 +372,15 @@ out: static int __init tegra20_init_rtc(struct device_node *np) { - struct clk *clk; + int ret; - rtc_base = of_iomap(np, 0); - if (!rtc_base) { - pr_err("Can't map RTC registers\n"); - return -ENXIO; - } + ret = timer_of_init(np, &suspend_rtc_to); + if (ret) + return ret; - /* - * rtc registers are used by read_persistent_clock, keep the rtc clock - * enabled - */ - clk = of_clk_get(np, 0); - if (IS_ERR(clk)) - pr_warn("Unable to get rtc-tegra clock\n"); - else - clk_prepare_enable(clk); + clocksource_register_hz(&suspend_rtc_clocksource, 1000); - return register_persistent_clock(tegra_read_persistent_clock64); + return 0; } TIMER_OF_DECLARE(tegra20_rtc, "nvidia,tegra20-rtc", tegra20_init_rtc); #endif diff --git a/drivers/clocksource/timer-u300.c b/drivers/clocksource/timer-u300.c index be34b116d4d2..32adc3057dda 100644 --- a/drivers/clocksource/timer-u300.c +++ b/drivers/clocksource/timer-u300.c @@ -1,6 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2007-2009 ST-Ericsson AB - * License terms: GNU General Public License (GPL) version 2 * Timer COH 901 328, runs the OS timer interrupt. * Author: Linus Walleij <linus.walleij@stericsson.com> */ diff --git a/drivers/clocksource/timer-versatile.c b/drivers/clocksource/timer-versatile.c index 39725d38aede..e4ebb656d005 100644 --- a/drivers/clocksource/timer-versatile.c +++ b/drivers/clocksource/timer-versatile.c @@ -1,12 +1,5 @@ +// SPDX-License-Identifier: GPL-2.0-only /* - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. * * Copyright (C) 2014 ARM Limited */ diff --git a/drivers/clocksource/timer-vf-pit.c b/drivers/clocksource/timer-vf-pit.c index 0f92089ec08c..fef0bb4e0c8c 100644 --- a/drivers/clocksource/timer-vf-pit.c +++ b/drivers/clocksource/timer-vf-pit.c @@ -1,10 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright 2012-2013 Freescale Semiconductor, Inc. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. */ #include <linux/interrupt.h> diff --git a/drivers/clocksource/timer-vt8500.c b/drivers/clocksource/timer-vt8500.c index c3aff1a8f7d5..bb424bcefbb3 100644 --- a/drivers/clocksource/timer-vt8500.c +++ b/drivers/clocksource/timer-vt8500.c @@ -1,22 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * arch/arm/mach-vt8500/timer.c * * Copyright (C) 2012 Tony Prisk <linux@prisktech.co.nz> * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* |