From: Sekhar Nori <nsekhar@ti.com>
To: Bartosz Golaszewski <brgl@bgdev.pl>,
Kevin Hilman <khilman@kernel.org>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Thomas Gleixner <tglx@linutronix.de>
Cc: <linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: Re: [PATCH 02/17] clocksource: davinci-timer: new driver
Date: Mon, 14 Jan 2019 17:50:17 +0530 [thread overview]
Message-ID: <08200de1-fde5-c525-c874-c7872259067b@ti.com> (raw)
In-Reply-To: <20190111172134.30147-3-brgl@bgdev.pl>
Hi Bartosz,
On 11/01/19 10:51 PM, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
>
> Currently the clocksource and clockevent support for davinci platforms
> lives in mach-davinci. It hard-codes many things, used global variables,
> implements functionalities unused by any platform and has code fragments
> scattered across many (often unrelated) files.
>
> Implement a new, modern and simplified timer driver and put it into
> drivers/clocksource. We still need to support legacy board files so
> export a config structure and a function that allows machine code to
> register the timer.
>
> We don't check the return values of regmap reads and writes since with
> mmio it's only likely to fail due to programmer's errors.
>
> We also don't bother freeing resources on errors in
> davinci_timer_register() as the system won't boot without a timer anyway.
>
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
With this series, DA830 fails to boot. Rest of the devices are okay from
boot perspective.
DA830 is pretty unique because it uses the same timer-half for both
clocksource and clockevent. May be you can set the same configuration on
your DA850 to see the same issue? Else, I will enable low-level debug
and try to provide more debug data.
Some minor comments below from quick look:
> diff --git a/drivers/clocksource/timer-davinci.c b/drivers/clocksource/timer-davinci.c
> new file mode 100644
> index 000000000000..7282a1fda80f
> --- /dev/null
> +++ b/drivers/clocksource/timer-davinci.c
> @@ -0,0 +1,415 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * TI DaVinci clocksource driver
> + *
> + * Copyright (C) 2019 Texas Instruments
> + * Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> + * (with some parts adopted from code by Kevin Hilman <khilman@baylibre.com>)
Did you really intend GPL v2 or later? The original code referred to
above is marked 2.0 only.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/clockchips.h>
> +#include <linux/clocksource.h>
> +#include <linux/err.h>
> +#include <linux/interrupt.h>
> +#include <linux/kernel.h>
> +#include <linux/of_address.h>
> +#include <linux/of_irq.h>
> +#include <linux/regmap.h>
> +#include <linux/sched_clock.h>
> +
> +#include <clocksource/timer-davinci.h>
> +
> +#define DAVINCI_TIMER_REG_TIM12 0x10
> +#define DAVINCI_TIMER_REG_TIM34 0x14
> +#define DAVINCI_TIMER_REG_PRD12 0x18
> +#define DAVINCI_TIMER_REG_PRD34 0x1c
> +#define DAVINCI_TIMER_REG_TCR 0x20
> +#define DAVINCI_TIMER_REG_TGCR 0x24
> +
> +#define DAVINCI_TIMER_TIMMODE_MASK 0x0000000c
> +#define DAVINCI_TIMER_RESET_MASK 0x00000003
> +#define DAVINCI_TIMER_TIMMODE_32BIT_UNCHAINED 0x00000004
> +#define DAVINCI_TIMER_UNRESET 0x00000003
I think these are more readable if using BIT() and GENMASK()
Thanks,
Sekhar
next prev parent reply other threads:[~2019-01-14 12:20 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-11 17:21 [PATCH 00/17] ARM: davinci: modernize the timer support Bartosz Golaszewski
2019-01-11 17:21 ` [PATCH 01/17] ARM: dts: da850: fix interrupt numbers for clocksource Bartosz Golaszewski
2019-01-17 14:22 ` Sekhar Nori
2019-01-17 14:32 ` Bartosz Golaszewski
2019-01-11 17:21 ` [PATCH 02/17] clocksource: davinci-timer: new driver Bartosz Golaszewski
2019-01-14 12:20 ` Sekhar Nori [this message]
2019-01-14 16:39 ` Bartosz Golaszewski
2019-01-16 9:18 ` Sekhar Nori
2019-01-17 12:42 ` Sekhar Nori
2019-01-17 14:01 ` Bartosz Golaszewski
2019-01-24 12:09 ` Sekhar Nori
2019-01-23 0:30 ` Kevin Hilman
2019-01-11 17:21 ` [PATCH 03/17] ARM: davinci: enable the clocksource driver for DT mode Bartosz Golaszewski
2019-01-11 17:21 ` [PATCH 04/17] ARM: davinci: da850: WARN() if clk_get() fails Bartosz Golaszewski
2019-01-14 12:22 ` Sekhar Nori
2019-01-11 17:21 ` [PATCH 05/17] ARM: davinci: da830: " Bartosz Golaszewski
2019-01-11 17:21 ` [PATCH 06/17] ARM: davinci: dm355: " Bartosz Golaszewski
2019-01-11 17:21 ` [PATCH 07/17] ARM: davinci: dm365: " Bartosz Golaszewski
2019-01-11 17:21 ` [PATCH 08/17] ARM: davinci: dm644x: " Bartosz Golaszewski
2019-01-11 17:21 ` [PATCH 09/17] ARM: davinci: dm646x: " Bartosz Golaszewski
2019-01-11 17:21 ` [PATCH 10/17] ARM: davinci: da850: switch to using the clocksource driver Bartosz Golaszewski
2019-01-11 17:21 ` [PATCH 11/17] ARM: davinci: da830: " Bartosz Golaszewski
2019-01-11 17:21 ` [PATCH 12/17] ARM: davinci: move timer definitions to davinci.h Bartosz Golaszewski
2019-01-11 17:21 ` [PATCH 13/17] ARM: davinci: dm355: switch to using the clocksource driver Bartosz Golaszewski
2019-01-11 17:21 ` [PATCH 14/17] ARM: davinci: dm365: " Bartosz Golaszewski
2019-01-11 17:21 ` [PATCH 15/17] ARM: davinci: dm644x: " Bartosz Golaszewski
2019-01-11 17:21 ` [PATCH 16/17] ARM: davinci: dm646x: " Bartosz Golaszewski
2019-01-11 17:21 ` [PATCH 17/17] ARM: davinci: remove legacy timer support Bartosz Golaszewski
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=08200de1-fde5-c525-c874-c7872259067b@ti.com \
--to=nsekhar@ti.com \
--cc=bgolaszewski@baylibre.com \
--cc=brgl@bgdev.pl \
--cc=daniel.lezcano@linaro.org \
--cc=devicetree@vger.kernel.org \
--cc=khilman@kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=robh+dt@kernel.org \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).