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Date: Mon, 2 Oct 2023 09:43:06 +0000
From: Peng Fan <peng.fan@....com>
To: Bartosz Golaszewski <brgl@...ev.pl>,
"Peng Fan (OSS)" <peng.fan@....nxp.com>
CC: Linus Walleij <linus.walleij@...aro.org>,
Andy Shevchenko <andy@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
Stefan Agner <stefan@...er.ch>,
Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Fabio Estevam <festevam@...il.com>,
dl-linux-imx <linux-imx@....com>,
Marco Felsch <m.felsch@...gutronix.de>,
"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>
Subject: RE: [PATCH v5 4/7] gpio: vf610: add i.MX8ULP of_device_id entry
> Subject: Re: [PATCH v5 4/7] gpio: vf610: add i.MX8ULP of_device_id entry
>
> On Sun, Oct 1, 2023 at 10:23 AM Peng Fan (OSS) <peng.fan@....nxp.com>
> wrote:
> >
> > From: Peng Fan <peng.fan@....com>
> >
> > i.MX8ULP/93 GPIO supports similar feature as i.MX7ULP GPIO, but
> > i.MX8ULP is actually not hardware compatible with i.MX7ULP. i.MX8ULP
> > only has one register base, not two bases. i.MX8ULP and i.MX93
> > actually has two interrupts for each gpio controller, one for
> > Trustzone non-secure world, one for secure world.
> >
> > Although the Linux Kernel driver gpio-vf610.c could work with
> > fsl,imx7ulp-gpio compatible, it is based on some tricks did in device
> > tree with some offset added to base address.
> >
> > Add a new of_device_id entry for i.MX8ULP. But to make the driver
> > could also support old bindings, check the compatible string first,
> > before check the device data.
> >
> > Signed-off-by: Peng Fan <peng.fan@....com>
> > ---
> > drivers/gpio/gpio-vf610.c | 47
> > ++++++++++++++++++++++++++++++++++++++++-------
> > 1 file changed, 40 insertions(+), 7 deletions(-)
> >
> > diff --git a/drivers/gpio/gpio-vf610.c b/drivers/gpio/gpio-vf610.c
> > index dbc7ba0ee72c..8e12706c0b22 100644
> > --- a/drivers/gpio/gpio-vf610.c
> > +++ b/drivers/gpio/gpio-vf610.c
> > @@ -25,6 +25,7 @@
> > struct fsl_gpio_soc_data {
> > /* SoCs has a Port Data Direction Register (PDDR) */
> > bool have_paddr;
> > + bool have_dual_base;
> > };
> >
> > struct vf610_gpio_port {
> > @@ -60,13 +61,26 @@ struct vf610_gpio_port {
> > #define PORT_INT_EITHER_EDGE 0xb
> > #define PORT_INT_LOGIC_ONE 0xc
> >
> > +#define IMX8ULP_GPIO_BASE_OFF 0x40
> > +#define IMX8ULP_BASE_OFF 0x80
> > +
> > +static const struct fsl_gpio_soc_data vf610_data = {
> > + .have_dual_base = true,
> > +};
> > +
> > static const struct fsl_gpio_soc_data imx_data = {
> > .have_paddr = true,
> > + .have_dual_base = true,
> > +};
> > +
> > +static const struct fsl_gpio_soc_data imx8ulp_data = {
> > + .have_paddr = true,
> > };
> >
> > static const struct of_device_id vf610_gpio_dt_ids[] = {
> > - { .compatible = "fsl,vf610-gpio", .data = NULL, },
> > + { .compatible = "fsl,vf610-gpio", .data = &vf610_data },
> > { .compatible = "fsl,imx7ulp-gpio", .data = &imx_data, },
> > + { .compatible = "fsl,imx8ulp-gpio", .data = &imx8ulp_data, },
> > { /* sentinel */ }
> > };
> >
> > @@ -263,19 +277,38 @@ static int vf610_gpio_probe(struct
> platform_device *pdev)
> > struct gpio_irq_chip *girq;
> > int i;
> > int ret;
> > + bool dual_base;
> >
> > port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
> > if (!port)
> > return -ENOMEM;
> >
> > port->sdata = of_device_get_match_data(dev);
> > - port->base = devm_platform_ioremap_resource(pdev, 0);
> > - if (IS_ERR(port->base))
> > - return PTR_ERR(port->base);
> >
> > - port->gpio_base = devm_platform_ioremap_resource(pdev, 1);
> > - if (IS_ERR(port->gpio_base))
> > - return PTR_ERR(port->gpio_base);
> > + dual_base = port->sdata->have_dual_base;
> > +
> > + /* support old compatible strings */
> > + if (device_is_compatible(dev, "fsl,imx7ulp-gpio") &&
> > + (device_is_compatible(dev, "fsl,imx93-gpio") ||
>
> Why not just add this compatible to vf610_gpio_dt_ids?
"fsl,imx93-gpio", "fsl,imx7ulp-gpio" is not a correct entry
combination. This is to support legacy old compatible
strings.
Thanks,
Peng.
>
> Bart
>
> > + (device_is_compatible(dev, "fsl,imx8ulp-gpio"))))
> > + dual_base = true;
> > +
> > + if (dual_base) {
> > + port->base = devm_platform_ioremap_resource(pdev, 0);
> > + if (IS_ERR(port->base))
> > + return PTR_ERR(port->base);
> > +
> > + port->gpio_base = devm_platform_ioremap_resource(pdev, 1);
> > + if (IS_ERR(port->gpio_base))
> > + return PTR_ERR(port->gpio_base);
> > + } else {
> > + port->base = devm_platform_ioremap_resource(pdev, 0);
> > + if (IS_ERR(port->base))
> > + return PTR_ERR(port->base);
> > +
> > + port->gpio_base = port->base + IMX8ULP_GPIO_BASE_OFF;
> > + port->base = port->base + IMX8ULP_BASE_OFF;
> > + }
> >
> > port->irq = platform_get_irq(pdev, 0);
> > if (port->irq < 0)
> >
> > --
> > 2.37.1
> >
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