linux-kernel - Re: [PATCH 2/4] timer: remove tango driver

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Date:   Thu, 21 Jan 2021 13:48:44 +0000
From:   Måns Rullgård <mans@...sr.com>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Arnd Bergmann <arnd@...db.de>,
        Marc Gonzalez <marc.w.gonzalez@...e.fr>
Subject: Re: [PATCH 2/4] timer: remove tango driver

Arnd Bergmann <arnd@...nel.org> writes:

> From: Arnd Bergmann <arnd@...db.de>
>
> The tango platform is getting removed, so the driver is no
> longer needed.
>
> Cc: Marc Gonzalez <marc.w.gonzalez@...e.fr>
> Cc: Mans Rullgard <mans@...sr.com>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Acked-by: Mans Rullgard <mans@...sr.com>

> ---
>  drivers/clocksource/Kconfig            |  8 ----
>  drivers/clocksource/Makefile           |  1 -
>  drivers/clocksource/timer-tango-xtal.c | 57 --------------------------
>  3 files changed, 66 deletions(-)
>  delete mode 100644 drivers/clocksource/timer-tango-xtal.c
>
> diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
> index 824a0f6b77d4..1feadd067677 100644
> --- a/drivers/clocksource/Kconfig
> +++ b/drivers/clocksource/Kconfig
> @@ -560,14 +560,6 @@ config CLKSRC_MIPS_GIC
>  	select CLOCKSOURCE_WATCHDOG
>  	select TIMER_OF
>
> -config CLKSRC_TANGO_XTAL
> -	bool "Clocksource for Tango SoC" if COMPILE_TEST
> -	depends on ARM
> -	select TIMER_OF
> -	select CLKSRC_MMIO
> -	help
> -	  This enables the clocksource for Tango SoC.
> -
>  config CLKSRC_PXA
>  	bool "Clocksource for PXA or SA-11x0 platform" if COMPILE_TEST
>  	depends on HAS_IOMEM
> diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
> index 41c154478a1a..1089f2ed8560 100644
> --- a/drivers/clocksource/Makefile
> +++ b/drivers/clocksource/Makefile
> @@ -72,7 +72,6 @@ obj-$(CONFIG_KEYSTONE_TIMER)		+= timer-keystone.o
>  obj-$(CONFIG_INTEGRATOR_AP_TIMER)	+= timer-integrator-ap.o
>  obj-$(CONFIG_CLKSRC_VERSATILE)		+= timer-versatile.o
>  obj-$(CONFIG_CLKSRC_MIPS_GIC)		+= mips-gic-timer.o
> -obj-$(CONFIG_CLKSRC_TANGO_XTAL)		+= timer-tango-xtal.o
>  obj-$(CONFIG_CLKSRC_IMX_GPT)		+= timer-imx-gpt.o
>  obj-$(CONFIG_CLKSRC_IMX_TPM)		+= timer-imx-tpm.o
>  obj-$(CONFIG_TIMER_IMX_SYS_CTR)		+= timer-imx-sysctr.o
> diff --git a/drivers/clocksource/timer-tango-xtal.c b/drivers/clocksource/timer-tango-xtal.c
> deleted file mode 100644
> index 3f94e454ef99..000000000000
> --- a/drivers/clocksource/timer-tango-xtal.c
> +++ /dev/null
> @@ -1,57 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0
> -#include <linux/clocksource.h>
> -#include <linux/sched_clock.h>
> -#include <linux/of_address.h>
> -#include <linux/printk.h>
> -#include <linux/delay.h>
> -#include <linux/init.h>
> -#include <linux/clk.h>
> -
> -static void __iomem *xtal_in_cnt;
> -static struct delay_timer delay_timer;
> -
> -static unsigned long notrace read_xtal_counter(void)
> -{
> -	return readl_relaxed(xtal_in_cnt);
> -}
> -
> -static u64 notrace read_sched_clock(void)
> -{
> -	return read_xtal_counter();
> -}
> -
> -static int __init tango_clocksource_init(struct device_node *np)
> -{
> -	struct clk *clk;
> -	int xtal_freq, ret;
> -
> -	xtal_in_cnt = of_iomap(np, 0);
> -	if (xtal_in_cnt == NULL) {
> -		pr_err("%pOF: invalid address\n", np);
> -		return -ENXIO;
> -	}
> -
> -	clk = of_clk_get(np, 0);
> -	if (IS_ERR(clk)) {
> -		pr_err("%pOF: invalid clock\n", np);
> -		return PTR_ERR(clk);
> -	}
> -
> -	xtal_freq = clk_get_rate(clk);
> -	delay_timer.freq = xtal_freq;
> -	delay_timer.read_current_timer = read_xtal_counter;
> -
> -	ret = clocksource_mmio_init(xtal_in_cnt, "tango-xtal", xtal_freq, 350,
> -				    32, clocksource_mmio_readl_up);
> -	if (ret) {
> -		pr_err("%pOF: registration failed\n", np);
> -		return ret;
> -	}
> -
> -	sched_clock_register(read_sched_clock, 32, xtal_freq);
> -	register_current_timer_delay(&delay_timer);
> -
> -	return 0;
> -}
> -
> -TIMER_OF_DECLARE(tango, "sigma,tick-counter", tango_clocksource_init);
> -- 
>
> 2.29.2
>

-- 
Måns Rullgård