linux-kernel - Re: [PATCH 4/4] counter: 104-quad-8: Utilize helper functions to handle PR, FLAG and PSC

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ZBhRb+v/8+vSwjz6@smile.fi.intel.com>
Date:   Mon, 20 Mar 2023 14:28:31 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     William Breathitt Gray <william.gray@...aro.org>
Cc:     linux-iio@...r.kernel.org, Johannes Berg <johannes.berg@...el.com>,
        Jonathan Cameron <jic23@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] counter: 104-quad-8: Utilize helper functions to
 handle PR, FLAG and PSC

On Sat, Mar 18, 2023 at 10:59:51AM -0400, William Breathitt Gray wrote:
> The Preset Register (PR), Flag Register (FLAG), and Filter Clock
> Prescaler (PSC) have common usage patterns. Wrap up such usage into
> dedicated functions to improve code clarity.

...

> +static void quad8_preset_register_set(struct quad8 *const priv, const size_t id,
> +				      const unsigned long preset)
> +{
> +	struct channel_reg __iomem *const chan = priv->reg->channel + id;
> +	int i;
> +
> +	/* Reset Byte Pointer */
> +	iowrite8(SELECT_RLD | RESET_BP, &chan->control);
> +
> +	/* Set Preset Register */
> +	for (i = 0; i < 3; i++)
> +		iowrite8(preset >> (8 * i), &chan->data);
> +}

May we add generic __iowrite8_copy() / __ioread8_copy() instead?

It seems that even current __ioread32_copy() and __iowrite32_copy() has to
be amended to support IO.

-- 
With Best Regards,
Andy Shevchenko