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Message-ID: <CAK8P3a1JEzZFn4FXi2tb2jOFtV-3MRD-7O3gPBiZDM4qc3BTnA@mail.gmail.com>
Date: Thu, 25 May 2017 23:02:22 +0200
From: Arnd Bergmann <arnd@...db.de>
To: Dong Aisheng <aisheng.dong@....com>
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Linux ARM <linux-arm-kernel@...ts.infradead.org>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Thomas Gleixner <tglx@...utronix.de>,
Shawn Guo <shawnguo@...nel.org>, ping.bai@....com,
anson.huang@....com, dongas86@...il.com,
Sascha Hauer <kernel@...gutronix.de>
Subject: Re: [PATCH 2/2] timer: imx-tpm: add imx tpm timer support
On Sat, May 13, 2017 at 9:29 AM, Dong Aisheng <aisheng.dong@....com> wrote:
> diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
> index 3356ab8..03dfd6a 100644
> --- a/drivers/clocksource/Kconfig
> +++ b/drivers/clocksource/Kconfig
> @@ -590,6 +590,11 @@ config CLKSRC_IMX_GPT
> depends on ARM && CLKDEV_LOOKUP
> select CLKSRC_MMIO
>
> +config CLKSRC_IMX_TPM
> + bool "Clocksource using i.MX TPM" if COMPILE_TEST
> + depends on ARM && CLKDEV_LOOKUP && GENERIC_CLOCKEVENTS
> + select CLKSRC_MMIO
> +
This needs a help text
> +static inline void tpm_timer_disable(void)
> +{
> + unsigned int val;
> +
> + /* channel disable */
> + val = __raw_readl(timer_base + TPM_C0SC);
> + val &= ~(TPM_C0SC_MODE_MASK | TPM_C0SC_CHIE);
> + __raw_writel(val, timer_base + TPM_C0SC);
> +}
__raw_readl/__raw_writel is broken on big-endian kernels, please
use readl/writel instead.
Arnd
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