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SubjectRe: [PATCH v4 4/4] gpio: Add support for Intel ICHx/3100/Series[56] GPIO
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On Fri, 2011-02-25 at 15:26 -0600, Peter Tyser wrote:
> This driver works on many Intel chipsets, including the ICH6, ICH7,
> ICH8, ICH9, ICH10, 3100, Series 5/3400 (Ibex Peak), Series 6/C200
> (Cougar Point).

Hi Peter.

just trivia...

> diff --git a/drivers/gpio/ichx_gpio.c b/drivers/gpio/ichx_gpio.c
[]
> @@ -0,0 +1,551 @@
> +/*
> + * Intel ICH6-10, Series 5 and 6 GPIO driver
[]
> + */
> +

You could use

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

before any #include

so that the uses of
printk(KERN_<level> "%s: foo...\n", DRV_NAME, bar...);
can be
pr_<level>("foo...\n", bar...);

> +#include <linux/module.h>
> +#include <linux/pci.h>
> +#include <linux/gpio.h>
> +#include <linux/platform_device.h>

[]

> +static int modparam_gpiobase = -1 /* dynamic */;

Pretty unusual commenting style and too easy to lose sight
of the terminating semicolon.

It's more usually written as:

static int modparam_gpiobase = -1; /* dynamic */

> +static int __devinit ichx_gpio_init(struct pci_dev *pdev,
> + const struct pci_device_id *ent,
> + struct platform_device *dev)
> +{
[]
> + if (!ichx_priv.gpio_base) {
> + printk(KERN_ERR "%s: GPIO BAR not enumerated\n", DRV_NAME);

print->pr_<level> like:
pr_err("GPIO BAR not enumerated\n");

> + if (ichx_priv.desc->gpe0_sts_ofs) {
> + pci_read_config_dword(pdev, PCI_ICHX_ACPI_BAR,
> + (u32 *)&ichx_priv.pm_base);
> + ichx_priv.pm_base &= PCI_BASE_ADDRESS_IO_MASK;
> + if (!ichx_priv.pm_base)
> + printk(KERN_WARNING "%s: ACPI BAR not enumerated, "
> + "GPI 0 - 15 unusable\n", DRV_NAME);

pr_warn("ACPI BAR not enumerated, GPI 0 - 15 unusable\n");

and so forth for all the printks.

One other typo:

> +static int ich6_gpio_request(struct gpio_chip *chip, unsigned nr)
> +{
> + /*
> + * Fixups for bits 16 and 17 are necessary on the Intel ICH6/3100
> + * brdige as they are controlled by USE register bits 0 and 1. See
>

bridge




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