From: Antony Pavlov <antonynpavlov@gmail.com>
To: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH] ns16550: switch to resource
Date: Sat, 30 Jul 2011 16:07:30 +0400 [thread overview]
Message-ID: <CAA4bVAHVAbNCHcXY7_3Pp1hHZNRdh7rv7p5AHs7V4yUUnaP6+w@mail.gmail.com> (raw)
In-Reply-To: <1312004257-7009-1-git-send-email-plagnioj@jcrosoft.com>
On 30/07/2011, Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> wrote:
> +static uint32_t ns16550_read(struct console_device *cdev, uint32_t off)
> +{
> + struct device_d *dev = cdev->dev;
> + struct NS16550_plat *plat = (struct NS16550_plat *)dev->platform_data;
> + int width = dev->resource[0].flags & IORESOURCE_MEM_TYPE_MASK;
> +
> + off <<= plat->shift;
> +
> + if (plat->reg_read)
> + return plat->reg_read((unsigned long)dev->priv, off);
>
So, this code __always__ make swap before calling platform-dependent
reg_read (if any).
And platform-dependent reg_read must assume the presence of the shift.
I propose this variant:
---------------------------
if (plat->reg_read)
return plat->reg_read((unsigned long)dev->priv, off);
off <<= plat->shift;
---------------------------
> +static void ns16550_write(struct console_device *cdev, uint32_t val,
> + uint32_t off)
> +{
> + struct device_d *dev = cdev->dev;
> + struct NS16550_plat *plat = (struct NS16550_plat *)dev->platform_data;
> + int width = dev->resource[0].flags & IORESOURCE_MEM_TYPE_MASK;
> +
> + off <<= plat->shift;
> +
> + if (plat->reg_write) {
> + plat->reg_write(val, (unsigned long)dev->priv, off);
> + return;
> + }
Near the same code.
--
Best regards,
Antony Pavlov
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next prev parent reply other threads:[~2011-07-30 12:07 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-30 5:37 Jean-Christophe PLAGNIOL-VILLARD
2011-07-30 12:07 ` Antony Pavlov [this message]
2011-07-30 12:10 ` Jean-Christophe PLAGNIOL-VILLARD
2011-07-30 12:42 ` Antony Pavlov
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