drivers/gpio/gpio-menz127.c | 36 ++++++++++++++++++++++++++++++++++-- 1 file changed, 34 insertions(+), 2 deletions(-)
From 7655a73f3888a5d164d1f287ba1f2989bb2aadd2 Mon Sep 17 00:00:00 2001
From: Javier Rodriguez <josejavier.rodriguez@duagon.com>
Date: Tue, 28 Oct 2025 17:40:14 +0100
Subject: [PATCH] gpio: menz127: add support for 16Z034 and 16Z037 GPIO
controllers
The 16Z034 and 16Z037 are 8 bits GPIO controllers that share the
same registers and features of the 16Z127 GPIO controller.
Reviewed-by: Felipe Fensen Casado <felipe.jensen@duagon.com>
Signed-off-by: Javier Rodriguez <josejavier.rodriguez@duagon.com>
---
drivers/gpio/gpio-menz127.c | 36 ++++++++++++++++++++++++++++++++++--
1 file changed, 34 insertions(+), 2 deletions(-)
diff --git a/drivers/gpio/gpio-menz127.c b/drivers/gpio/gpio-menz127.c
index da2bf9381cc4..ec9228f1e631 100644
--- a/drivers/gpio/gpio-menz127.c
+++ b/drivers/gpio/gpio-menz127.c
@@ -24,6 +24,12 @@
#define MEN_Z127_ODER 0x1C
#define GPIO_TO_DBCNT_REG(gpio) ((gpio * 4) + 0x80)
+
+/* MEN Z127 supported model ids*/
+#define MEN_Z127_ID 0x7f
+#define MEN_Z034_ID 0x22
+#define MEN_Z037_ID 0x25
+
#define MEN_Z127_DB_MIN_US 50
/* 16 bit compare register. Each bit represents 50us */
#define MEN_Z127_DB_MAX_US (0xffff * MEN_Z127_DB_MIN_US)
@@ -36,6 +42,25 @@ struct men_z127_gpio {
struct resource *mem;
};
+static int men_z127_lookup_gpio_size(struct mcb_device *mdev,
+ unsigned long *sz)
+{
+ switch (mdev->id) {
+ case MEN_Z127_ID:
+ *sz = 4;
+ break;
+ case MEN_Z034_ID:
+ case MEN_Z037_ID:
+ *sz = 1;
+ break;
+ default:
+ dev_err(&mdev->dev, "no size found for id %d", mdev->id);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static int men_z127_debounce(struct gpio_chip *gc, unsigned gpio,
unsigned debounce)
{
@@ -140,6 +165,7 @@ static int men_z127_probe(struct mcb_device *mdev,
struct men_z127_gpio *men_z127_gpio;
struct device *dev = &mdev->dev;
int ret;
+ unsigned long sz;
men_z127_gpio = devm_kzalloc(dev, sizeof(struct men_z127_gpio),
GFP_KERNEL);
@@ -163,9 +189,13 @@ static int men_z127_probe(struct mcb_device *mdev,
mcb_set_drvdata(mdev, men_z127_gpio);
+ ret = men_z127_lookup_gpio_size(mdev, &sz);
+ if (ret)
+ return ret;
+
config = (struct gpio_generic_chip_config) {
.dev = &mdev->dev,
- .sz = 4,
+ .sz = sz,
.dat = men_z127_gpio->reg_base + MEN_Z127_PSR,
.set = men_z127_gpio->reg_base + MEN_Z127_CTRL,
.dirout = men_z127_gpio->reg_base + MEN_Z127_GPIODR,
@@ -186,7 +216,9 @@ static int men_z127_probe(struct mcb_device *mdev,
}
static const struct mcb_device_id men_z127_ids[] = {
- { .device = 0x7f },
+ { .device = MEN_Z127_ID },
+ { .device = MEN_Z034_ID },
+ { .device = MEN_Z037_ID },
{ }
};
MODULE_DEVICE_TABLE(mcb, men_z127_ids);
--
2.51.0On Fri, Oct 31, 2025 at 11:08 AM Jose Javier Rodriguez Barbarin
<dev-josejavier.rodriguez@duagon.com> wrote:
>
> From 7655a73f3888a5d164d1f287ba1f2989bb2aadd2 Mon Sep 17 00:00:00 2001
> From: Javier Rodriguez <josejavier.rodriguez@duagon.com>
> Date: Tue, 28 Oct 2025 17:40:14 +0100
> Subject: [PATCH] gpio: menz127: add support for 16Z034 and 16Z037 GPIO
> controllers
>
I don't think you used `git send-email` to send this, did you just
copy the contents of the generated .patch into the email client?
> The 16Z034 and 16Z037 are 8 bits GPIO controllers that share the
> same registers and features of the 16Z127 GPIO controller.
>
> Reviewed-by: Felipe Fensen Casado <felipe.jensen@duagon.com>
> Signed-off-by: Javier Rodriguez <josejavier.rodriguez@duagon.com>
> ---
> drivers/gpio/gpio-menz127.c | 36 ++++++++++++++++++++++++++++++++++--
> 1 file changed, 34 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpio/gpio-menz127.c b/drivers/gpio/gpio-menz127.c
> index da2bf9381cc4..ec9228f1e631 100644
> --- a/drivers/gpio/gpio-menz127.c
> +++ b/drivers/gpio/gpio-menz127.c
> @@ -24,6 +24,12 @@
> #define MEN_Z127_ODER 0x1C
> #define GPIO_TO_DBCNT_REG(gpio) ((gpio * 4) + 0x80)
>
> +
Stray newline.
> +/* MEN Z127 supported model ids*/
> +#define MEN_Z127_ID 0x7f
> +#define MEN_Z034_ID 0x22
> +#define MEN_Z037_ID 0x25
> +
> #define MEN_Z127_DB_MIN_US 50
> /* 16 bit compare register. Each bit represents 50us */
> #define MEN_Z127_DB_MAX_US (0xffff * MEN_Z127_DB_MIN_US)
> @@ -36,6 +42,25 @@ struct men_z127_gpio {
> struct resource *mem;
> };
>
> +static int men_z127_lookup_gpio_size(struct mcb_device *mdev,
> + unsigned long *sz)
> +{
> + switch (mdev->id) {
> + case MEN_Z127_ID:
> + *sz = 4;
> + break;
> + case MEN_Z034_ID:
> + case MEN_Z037_ID:
> + *sz = 1;
> + break;
> + default:
> + dev_err(&mdev->dev, "no size found for id %d", mdev->id);
> + return -EINVAL;
You can return dev_err_probe() here, it's only used in probe(). But
TBH probe() is so small I'd just inline this into it.
> + }
> +
> + return 0;
> +}
> +
> static int men_z127_debounce(struct gpio_chip *gc, unsigned gpio,
> unsigned debounce)
> {
> @@ -140,6 +165,7 @@ static int men_z127_probe(struct mcb_device *mdev,
> struct men_z127_gpio *men_z127_gpio;
> struct device *dev = &mdev->dev;
> int ret;
> + unsigned long sz;
>
> men_z127_gpio = devm_kzalloc(dev, sizeof(struct men_z127_gpio),
> GFP_KERNEL);
> @@ -163,9 +189,13 @@ static int men_z127_probe(struct mcb_device *mdev,
>
> mcb_set_drvdata(mdev, men_z127_gpio);
>
> + ret = men_z127_lookup_gpio_size(mdev, &sz);
> + if (ret)
> + return ret;
> +
> config = (struct gpio_generic_chip_config) {
> .dev = &mdev->dev,
> - .sz = 4,
> + .sz = sz,
> .dat = men_z127_gpio->reg_base + MEN_Z127_PSR,
> .set = men_z127_gpio->reg_base + MEN_Z127_CTRL,
> .dirout = men_z127_gpio->reg_base + MEN_Z127_GPIODR,
> @@ -186,7 +216,9 @@ static int men_z127_probe(struct mcb_device *mdev,
> }
>
> static const struct mcb_device_id men_z127_ids[] = {
> - { .device = 0x7f },
> + { .device = MEN_Z127_ID },
> + { .device = MEN_Z034_ID },
> + { .device = MEN_Z037_ID },
> { }
> };
> MODULE_DEVICE_TABLE(mcb, men_z127_ids);
> --
> 2.51.0
Bartosz
On Wed, Nov 05, 2025 at 09:36:52AM +0100, Bartosz Golaszewski wrote:
> On Fri, Oct 31, 2025 at 11:08 AM Jose Javier Rodriguez Barbarin
> <dev-josejavier.rodriguez@duagon.com> wrote:
> >
> > From 7655a73f3888a5d164d1f287ba1f2989bb2aadd2 Mon Sep 17 00:00:00 2001
> > From: Javier Rodriguez <josejavier.rodriguez@duagon.com>
> > Date: Tue, 28 Oct 2025 17:40:14 +0100
> > Subject: [PATCH] gpio: menz127: add support for 16Z034 and 16Z037 GPIO
> > controllers
> >
>
> I don't think you used `git send-email` to send this, did you just
> copy the contents of the generated .patch into the email client?
>
My bad. This was my first time using alpine mail client instead of using
`git send-email`. Since your answer, I did some local tests and now I know
how to use alpine for submitting patches.
> > The 16Z034 and 16Z037 are 8 bits GPIO controllers that share the
> > same registers and features of the 16Z127 GPIO controller.
> >
> > Reviewed-by: Felipe Fensen Casado <felipe.jensen@duagon.com>
> > Signed-off-by: Javier Rodriguez <josejavier.rodriguez@duagon.com>
> > ---
> > drivers/gpio/gpio-menz127.c | 36 ++++++++++++++++++++++++++++++++++--
> > 1 file changed, 34 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpio/gpio-menz127.c b/drivers/gpio/gpio-menz127.c
> > index da2bf9381cc4..ec9228f1e631 100644
> > --- a/drivers/gpio/gpio-menz127.c
> > +++ b/drivers/gpio/gpio-menz127.c
> > @@ -24,6 +24,12 @@
> > #define MEN_Z127_ODER 0x1C
> > #define GPIO_TO_DBCNT_REG(gpio) ((gpio * 4) + 0x80)
> >
> > +
>
> Stray newline.
>
> > +/* MEN Z127 supported model ids*/
> > +#define MEN_Z127_ID 0x7f
> > +#define MEN_Z034_ID 0x22
> > +#define MEN_Z037_ID 0x25
> > +
> > #define MEN_Z127_DB_MIN_US 50
> > /* 16 bit compare register. Each bit represents 50us */
> > #define MEN_Z127_DB_MAX_US (0xffff * MEN_Z127_DB_MIN_US)
> > @@ -36,6 +42,25 @@ struct men_z127_gpio {
> > struct resource *mem;
> > };
> >
> > +static int men_z127_lookup_gpio_size(struct mcb_device *mdev,
> > + unsigned long *sz)
> > +{
> > + switch (mdev->id) {
> > + case MEN_Z127_ID:
> > + *sz = 4;
> > + break;
> > + case MEN_Z034_ID:
> > + case MEN_Z037_ID:
> > + *sz = 1;
> > + break;
> > + default:
> > + dev_err(&mdev->dev, "no size found for id %d", mdev->id);
> > + return -EINVAL;
>
> You can return dev_err_probe() here, it's only used in probe(). But
> TBH probe() is so small I'd just inline this into it.
>
Thanks for your suggestions. I usually try to implement small functions for
improving the reading, but you are right. I've moved these lines to probe(),
using dev_err_probe() as well.
> > + }
> > +
> > + return 0;
> > +}
> > +
> > static int men_z127_debounce(struct gpio_chip *gc, unsigned gpio,
> > unsigned debounce)
> > {
> > @@ -140,6 +165,7 @@ static int men_z127_probe(struct mcb_device *mdev,
> > struct men_z127_gpio *men_z127_gpio;
> > struct device *dev = &mdev->dev;
> > int ret;
> > + unsigned long sz;
> >
> > men_z127_gpio = devm_kzalloc(dev, sizeof(struct men_z127_gpio),
> > GFP_KERNEL);
> > @@ -163,9 +189,13 @@ static int men_z127_probe(struct mcb_device *mdev,
> >
> > mcb_set_drvdata(mdev, men_z127_gpio);
> >
> > + ret = men_z127_lookup_gpio_size(mdev, &sz);
> > + if (ret)
> > + return ret;
> > +
> > config = (struct gpio_generic_chip_config) {
> > .dev = &mdev->dev,
> > - .sz = 4,
> > + .sz = sz,
> > .dat = men_z127_gpio->reg_base + MEN_Z127_PSR,
> > .set = men_z127_gpio->reg_base + MEN_Z127_CTRL,
> > .dirout = men_z127_gpio->reg_base + MEN_Z127_GPIODR,
> > @@ -186,7 +216,9 @@ static int men_z127_probe(struct mcb_device *mdev,
> > }
> >
> > static const struct mcb_device_id men_z127_ids[] = {
> > - { .device = 0x7f },
> > + { .device = MEN_Z127_ID },
> > + { .device = MEN_Z034_ID },
> > + { .device = MEN_Z037_ID },
> > { }
> > };
> > MODULE_DEVICE_TABLE(mcb, men_z127_ids);
> > --
> > 2.51.0
>
> Bartosz
Thank you, I will submit v2 with these changes.
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