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linux/drivers/clocksource/timer-oxnas-rps.c

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201 Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 228 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528171438.107155473@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-28 17:10:04 +00:00
// SPDX-License-Identifier: GPL-2.0-only
clocksource/drivers/oxnas-rps: Add Oxford Semiconductor RPS Dual Timer Add clocksource and clockevent driver from dual RPS timer. The HW provides a dual one-shot or periodic 24bit timers, the drivers set the first one as tick event source and the second as a continuous scheduler clock source. The timer can use 1, 16 or 256 as pre-dividers, thus the clocksource uses 16 by default. CC: Ma Haijun <mahaijuns@gmail.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-15 10:13:26 +00:00
/*
* 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>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <linux/clockchips.h>
#include <linux/sched_clock.h>
/* TIMER1 used as tick
* TIMER2 used as clocksource
*/
/* Registers definitions */
#define TIMER_LOAD_REG 0x0
#define TIMER_CURR_REG 0x4
#define TIMER_CTRL_REG 0x8
#define TIMER_CLRINT_REG 0xC
#define TIMER_BITS 24
#define TIMER_MAX_VAL (BIT(TIMER_BITS) - 1)
#define TIMER_PERIODIC BIT(6)
#define TIMER_ENABLE BIT(7)
#define TIMER_DIV1 (0)
#define TIMER_DIV16 (1 << 2)
#define TIMER_DIV256 (2 << 2)
#define TIMER1_REG_OFFSET 0
#define TIMER2_REG_OFFSET 0x20
/* Clockevent & Clocksource data */
struct oxnas_rps_timer {
struct clock_event_device clkevent;
void __iomem *clksrc_base;
void __iomem *clkevt_base;
unsigned long timer_period;
unsigned int timer_prescaler;
struct clk *clk;
int irq;
};
static irqreturn_t oxnas_rps_timer_irq(int irq, void *dev_id)
{
struct oxnas_rps_timer *rps = dev_id;
writel_relaxed(0, rps->clkevt_base + TIMER_CLRINT_REG);
rps->clkevent.event_handler(&rps->clkevent);
return IRQ_HANDLED;
}
static void oxnas_rps_timer_config(struct oxnas_rps_timer *rps,
unsigned long period,
unsigned int periodic)
{
uint32_t cfg = rps->timer_prescaler;
if (period)
cfg |= TIMER_ENABLE;
if (periodic)
cfg |= TIMER_PERIODIC;
writel_relaxed(period, rps->clkevt_base + TIMER_LOAD_REG);
writel_relaxed(cfg, rps->clkevt_base + TIMER_CTRL_REG);
}
static int oxnas_rps_timer_shutdown(struct clock_event_device *evt)
{
struct oxnas_rps_timer *rps =
container_of(evt, struct oxnas_rps_timer, clkevent);
oxnas_rps_timer_config(rps, 0, 0);
return 0;
}
static int oxnas_rps_timer_set_periodic(struct clock_event_device *evt)
{
struct oxnas_rps_timer *rps =
container_of(evt, struct oxnas_rps_timer, clkevent);
oxnas_rps_timer_config(rps, rps->timer_period, 1);
return 0;
}
static int oxnas_rps_timer_set_oneshot(struct clock_event_device *evt)
{
struct oxnas_rps_timer *rps =
container_of(evt, struct oxnas_rps_timer, clkevent);
oxnas_rps_timer_config(rps, rps->timer_period, 0);
return 0;
}
static int oxnas_rps_timer_next_event(unsigned long delta,
struct clock_event_device *evt)
{
struct oxnas_rps_timer *rps =
container_of(evt, struct oxnas_rps_timer, clkevent);
oxnas_rps_timer_config(rps, delta, 0);
return 0;
}
static int __init oxnas_rps_clockevent_init(struct oxnas_rps_timer *rps)
{
ulong clk_rate = clk_get_rate(rps->clk);
ulong timer_rate;
/* Start with prescaler 1 */
rps->timer_prescaler = TIMER_DIV1;
rps->timer_period = DIV_ROUND_UP(clk_rate, HZ);
timer_rate = clk_rate;
if (rps->timer_period > TIMER_MAX_VAL) {
rps->timer_prescaler = TIMER_DIV16;
timer_rate = clk_rate / 16;
rps->timer_period = DIV_ROUND_UP(timer_rate, HZ);
}
if (rps->timer_period > TIMER_MAX_VAL) {
rps->timer_prescaler = TIMER_DIV256;
timer_rate = clk_rate / 256;
rps->timer_period = DIV_ROUND_UP(timer_rate, HZ);
}
rps->clkevent.name = "oxnas-rps";
rps->clkevent.features = CLOCK_EVT_FEAT_PERIODIC |
CLOCK_EVT_FEAT_ONESHOT |
CLOCK_EVT_FEAT_DYNIRQ;
rps->clkevent.tick_resume = oxnas_rps_timer_shutdown;
rps->clkevent.set_state_shutdown = oxnas_rps_timer_shutdown;
rps->clkevent.set_state_periodic = oxnas_rps_timer_set_periodic;
rps->clkevent.set_state_oneshot = oxnas_rps_timer_set_oneshot;
rps->clkevent.set_next_event = oxnas_rps_timer_next_event;
rps->clkevent.rating = 200;
rps->clkevent.cpumask = cpu_possible_mask;
rps->clkevent.irq = rps->irq;
clockevents_config_and_register(&rps->clkevent,
timer_rate,
1,
TIMER_MAX_VAL);
pr_info("Registered clock event rate %luHz prescaler %x period %lu\n",
clk_rate,
rps->timer_prescaler,
rps->timer_period);
return 0;
}
/* Clocksource */
static void __iomem *timer_sched_base;
static u64 notrace oxnas_rps_read_sched_clock(void)
{
return ~readl_relaxed(timer_sched_base);
}
static int __init oxnas_rps_clocksource_init(struct oxnas_rps_timer *rps)
{
ulong clk_rate = clk_get_rate(rps->clk);
int ret;
/* use prescale 16 */
clk_rate = clk_rate / 16;
writel_relaxed(TIMER_MAX_VAL, rps->clksrc_base + TIMER_LOAD_REG);
writel_relaxed(TIMER_PERIODIC | TIMER_ENABLE | TIMER_DIV16,
rps->clksrc_base + TIMER_CTRL_REG);
timer_sched_base = rps->clksrc_base + TIMER_CURR_REG;
sched_clock_register(oxnas_rps_read_sched_clock,
TIMER_BITS, clk_rate);
ret = clocksource_mmio_init(timer_sched_base,
"oxnas_rps_clocksource_timer",
clk_rate, 250, TIMER_BITS,
clocksource_mmio_readl_down);
if (WARN_ON(ret)) {
pr_err("can't register clocksource\n");
return ret;
}
pr_info("Registered clocksource rate %luHz\n", clk_rate);
return 0;
}
clocksource/drivers/oxnas-rps: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Neil Armstrong <narmstrong@baylibre.com>
2016-06-16 16:10:58 +00:00
static int __init oxnas_rps_timer_init(struct device_node *np)
clocksource/drivers/oxnas-rps: Add Oxford Semiconductor RPS Dual Timer Add clocksource and clockevent driver from dual RPS timer. The HW provides a dual one-shot or periodic 24bit timers, the drivers set the first one as tick event source and the second as a continuous scheduler clock source. The timer can use 1, 16 or 256 as pre-dividers, thus the clocksource uses 16 by default. CC: Ma Haijun <mahaijuns@gmail.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-15 10:13:26 +00:00
{
struct oxnas_rps_timer *rps;
void __iomem *base;
int ret;
rps = kzalloc(sizeof(*rps), GFP_KERNEL);
clocksource/drivers/oxnas-rps: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Neil Armstrong <narmstrong@baylibre.com>
2016-06-16 16:10:58 +00:00
if (!rps)
return -ENOMEM;
clocksource/drivers/oxnas-rps: Add Oxford Semiconductor RPS Dual Timer Add clocksource and clockevent driver from dual RPS timer. The HW provides a dual one-shot or periodic 24bit timers, the drivers set the first one as tick event source and the second as a continuous scheduler clock source. The timer can use 1, 16 or 256 as pre-dividers, thus the clocksource uses 16 by default. CC: Ma Haijun <mahaijuns@gmail.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-15 10:13:26 +00:00
rps->clk = of_clk_get(np, 0);
clocksource/drivers/oxnas-rps: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Neil Armstrong <narmstrong@baylibre.com>
2016-06-16 16:10:58 +00:00
if (IS_ERR(rps->clk)) {
ret = PTR_ERR(rps->clk);
clocksource/drivers/oxnas-rps: Add Oxford Semiconductor RPS Dual Timer Add clocksource and clockevent driver from dual RPS timer. The HW provides a dual one-shot or periodic 24bit timers, the drivers set the first one as tick event source and the second as a continuous scheduler clock source. The timer can use 1, 16 or 256 as pre-dividers, thus the clocksource uses 16 by default. CC: Ma Haijun <mahaijuns@gmail.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-15 10:13:26 +00:00
goto err_alloc;
clocksource/drivers/oxnas-rps: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Neil Armstrong <narmstrong@baylibre.com>
2016-06-16 16:10:58 +00:00
}
clocksource/drivers/oxnas-rps: Add Oxford Semiconductor RPS Dual Timer Add clocksource and clockevent driver from dual RPS timer. The HW provides a dual one-shot or periodic 24bit timers, the drivers set the first one as tick event source and the second as a continuous scheduler clock source. The timer can use 1, 16 or 256 as pre-dividers, thus the clocksource uses 16 by default. CC: Ma Haijun <mahaijuns@gmail.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-15 10:13:26 +00:00
clocksource/drivers/oxnas-rps: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Neil Armstrong <narmstrong@baylibre.com>
2016-06-16 16:10:58 +00:00
ret = clk_prepare_enable(rps->clk);
if (ret)
clocksource/drivers/oxnas-rps: Add Oxford Semiconductor RPS Dual Timer Add clocksource and clockevent driver from dual RPS timer. The HW provides a dual one-shot or periodic 24bit timers, the drivers set the first one as tick event source and the second as a continuous scheduler clock source. The timer can use 1, 16 or 256 as pre-dividers, thus the clocksource uses 16 by default. CC: Ma Haijun <mahaijuns@gmail.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-15 10:13:26 +00:00
goto err_clk;
base = of_iomap(np, 0);
clocksource/drivers/oxnas-rps: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Neil Armstrong <narmstrong@baylibre.com>
2016-06-16 16:10:58 +00:00
if (!base) {
ret = -ENXIO;
clocksource/drivers/oxnas-rps: Add Oxford Semiconductor RPS Dual Timer Add clocksource and clockevent driver from dual RPS timer. The HW provides a dual one-shot or periodic 24bit timers, the drivers set the first one as tick event source and the second as a continuous scheduler clock source. The timer can use 1, 16 or 256 as pre-dividers, thus the clocksource uses 16 by default. CC: Ma Haijun <mahaijuns@gmail.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-15 10:13:26 +00:00
goto err_clk_prepare;
clocksource/drivers/oxnas-rps: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Neil Armstrong <narmstrong@baylibre.com>
2016-06-16 16:10:58 +00:00
}
clocksource/drivers/oxnas-rps: Add Oxford Semiconductor RPS Dual Timer Add clocksource and clockevent driver from dual RPS timer. The HW provides a dual one-shot or periodic 24bit timers, the drivers set the first one as tick event source and the second as a continuous scheduler clock source. The timer can use 1, 16 or 256 as pre-dividers, thus the clocksource uses 16 by default. CC: Ma Haijun <mahaijuns@gmail.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-15 10:13:26 +00:00
rps->irq = irq_of_parse_and_map(np, 0);
clocksource/drivers/oxnas-rps: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Neil Armstrong <narmstrong@baylibre.com>
2016-06-16 16:10:58 +00:00
if (rps->irq < 0) {
ret = -EINVAL;
clocksource/drivers/oxnas-rps: Add Oxford Semiconductor RPS Dual Timer Add clocksource and clockevent driver from dual RPS timer. The HW provides a dual one-shot or periodic 24bit timers, the drivers set the first one as tick event source and the second as a continuous scheduler clock source. The timer can use 1, 16 or 256 as pre-dividers, thus the clocksource uses 16 by default. CC: Ma Haijun <mahaijuns@gmail.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-15 10:13:26 +00:00
goto err_iomap;
clocksource/drivers/oxnas-rps: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Neil Armstrong <narmstrong@baylibre.com>
2016-06-16 16:10:58 +00:00
}
clocksource/drivers/oxnas-rps: Add Oxford Semiconductor RPS Dual Timer Add clocksource and clockevent driver from dual RPS timer. The HW provides a dual one-shot or periodic 24bit timers, the drivers set the first one as tick event source and the second as a continuous scheduler clock source. The timer can use 1, 16 or 256 as pre-dividers, thus the clocksource uses 16 by default. CC: Ma Haijun <mahaijuns@gmail.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-15 10:13:26 +00:00
rps->clkevt_base = base + TIMER1_REG_OFFSET;
rps->clksrc_base = base + TIMER2_REG_OFFSET;
/* Disable timers */
writel_relaxed(0, rps->clkevt_base + TIMER_CTRL_REG);
writel_relaxed(0, rps->clksrc_base + TIMER_CTRL_REG);
writel_relaxed(0, rps->clkevt_base + TIMER_LOAD_REG);
writel_relaxed(0, rps->clksrc_base + TIMER_LOAD_REG);
writel_relaxed(0, rps->clkevt_base + TIMER_CLRINT_REG);
writel_relaxed(0, rps->clksrc_base + TIMER_CLRINT_REG);
ret = request_irq(rps->irq, oxnas_rps_timer_irq,
IRQF_TIMER | IRQF_IRQPOLL,
"rps-timer", rps);
clocksource/drivers/oxnas-rps: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Neil Armstrong <narmstrong@baylibre.com>
2016-06-16 16:10:58 +00:00
if (ret)
clocksource/drivers/oxnas-rps: Add Oxford Semiconductor RPS Dual Timer Add clocksource and clockevent driver from dual RPS timer. The HW provides a dual one-shot or periodic 24bit timers, the drivers set the first one as tick event source and the second as a continuous scheduler clock source. The timer can use 1, 16 or 256 as pre-dividers, thus the clocksource uses 16 by default. CC: Ma Haijun <mahaijuns@gmail.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-15 10:13:26 +00:00
goto err_iomap;
ret = oxnas_rps_clocksource_init(rps);
if (ret)
goto err_irqreq;
ret = oxnas_rps_clockevent_init(rps);
if (ret)
goto err_irqreq;
clocksource/drivers/oxnas-rps: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Neil Armstrong <narmstrong@baylibre.com>
2016-06-16 16:10:58 +00:00
return 0;
clocksource/drivers/oxnas-rps: Add Oxford Semiconductor RPS Dual Timer Add clocksource and clockevent driver from dual RPS timer. The HW provides a dual one-shot or periodic 24bit timers, the drivers set the first one as tick event source and the second as a continuous scheduler clock source. The timer can use 1, 16 or 256 as pre-dividers, thus the clocksource uses 16 by default. CC: Ma Haijun <mahaijuns@gmail.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-15 10:13:26 +00:00
err_irqreq:
free_irq(rps->irq, rps);
err_iomap:
iounmap(base);
err_clk_prepare:
clk_disable_unprepare(rps->clk);
err_clk:
clk_put(rps->clk);
err_alloc:
kfree(rps);
clocksource/drivers/oxnas-rps: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Neil Armstrong <narmstrong@baylibre.com>
2016-06-16 16:10:58 +00:00
return ret;
clocksource/drivers/oxnas-rps: Add Oxford Semiconductor RPS Dual Timer Add clocksource and clockevent driver from dual RPS timer. The HW provides a dual one-shot or periodic 24bit timers, the drivers set the first one as tick event source and the second as a continuous scheduler clock source. The timer can use 1, 16 or 256 as pre-dividers, thus the clocksource uses 16 by default. CC: Ma Haijun <mahaijuns@gmail.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-15 10:13:26 +00:00
}
clocksource/drivers: Rename CLOCKSOURCE_OF_DECLARE to TIMER_OF_DECLARE The CLOCKSOURCE_OF_DECLARE macro is used widely for the timers to declare the clocksource at early stage. However, this macro is also used to initialize the clockevent if any, or the clockevent only. It was originally suggested to declare another macro to initialize a clockevent, so in order to separate the two entities even they belong to the same IP. This was not accepted because of the impact on the DT where splitting a clocksource/clockevent definition does not make sense as it is a Linux concept not a hardware description. On the other side, the clocksource has not interrupt declared while the clockevent has, so it is easy from the driver to know if the description is for a clockevent or a clocksource, IOW it could be implemented at the driver level. So instead of dealing with a named clocksource macro, let's use a more generic one: TIMER_OF_DECLARE. The patch has not functional changes. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Neil Armstrong <narmstrong@baylibre.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Matthias Brugger <matthias.bgg@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
2017-05-26 14:56:11 +00:00
TIMER_OF_DECLARE(ox810se_rps,
clocksources: Switch back to the clksrc table All the clocksource drivers's init function are now converted to return an error code. CLOCKSOURCE_OF_DECLARE is no longer used as well as the clksrc-of table. Let's convert back the names: - CLOCKSOURCE_OF_DECLARE_RET => CLOCKSOURCE_OF_DECLARE - clksrc-of-ret => clksrc-of Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> For exynos_mct and samsung_pwm_timer: Acked-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> For arch/arc: Acked-by: Vineet Gupta <vgupta@synopsys.com> For mediatek driver: Acked-by: Matthias Brugger <matthias.bgg@gmail.com> For the Rockchip-part Acked-by: Heiko Stuebner <heiko@sntech.de> For STi : Acked-by: Patrice Chotard <patrice.chotard@st.com> For the mps2-timer.c and versatile.c changes: Acked-by: Liviu Dudau <Liviu.Dudau@arm.com> For the OXNAS part : Acked-by: Neil Armstrong <narmstrong@baylibre.com> For LPC32xx driver: Acked-by: Sylvain Lemieux <slemieux.tyco@gmail.com> For Broadcom Kona timer change: Acked-by: Ray Jui <ray.jui@broadcom.com> For Sun4i and Sun5i: Acked-by: Chen-Yu Tsai <wens@csie.org> For Meson6: Acked-by: Carlo Caione <carlo@caione.org> For Keystone: Acked-by: Santosh Shilimkar <ssantosh@kernel.org> For NPS: Acked-by: Noam Camus <noamca@mellanox.com> For bcm2835: Acked-by: Eric Anholt <eric@anholt.net>
2016-06-06 22:27:44 +00:00
"oxsemi,ox810se-rps-timer", oxnas_rps_timer_init);
clocksource/drivers: Rename CLOCKSOURCE_OF_DECLARE to TIMER_OF_DECLARE The CLOCKSOURCE_OF_DECLARE macro is used widely for the timers to declare the clocksource at early stage. However, this macro is also used to initialize the clockevent if any, or the clockevent only. It was originally suggested to declare another macro to initialize a clockevent, so in order to separate the two entities even they belong to the same IP. This was not accepted because of the impact on the DT where splitting a clocksource/clockevent definition does not make sense as it is a Linux concept not a hardware description. On the other side, the clocksource has not interrupt declared while the clockevent has, so it is easy from the driver to know if the description is for a clockevent or a clocksource, IOW it could be implemented at the driver level. So instead of dealing with a named clocksource macro, let's use a more generic one: TIMER_OF_DECLARE. The patch has not functional changes. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Neil Armstrong <narmstrong@baylibre.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Matthias Brugger <matthias.bgg@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
2017-05-26 14:56:11 +00:00
TIMER_OF_DECLARE(ox820_rps,
clocksource/drivers/oxnas: Fix OX820 compatible The OX820 compatible is wrong is the driver, fix it. Fixes: 2ea3401e2a84 ("clocksource/drivers/oxnas: Add OX820 compatible") Reported-by: Daniel Golle <daniel@makrotopia.org> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2019-03-12 10:32:56 +00:00
"oxsemi,ox820-rps-timer", oxnas_rps_timer_init);
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