2020-11-18 07:21:39

by Chen-Yu Tsai

Subject: [PATCH v2 1/4] PCI: rockchip: Make 'ep-gpios' DT property optional

From: Chen-Yu Tsai <[email protected]>

The Rockchip PCIe controller DT binding clearly states that 'ep-gpios' is
an optional property. And indeed there are boards that don't require it.

Make the driver follow the binding by using devm_gpiod_get_optional()
instead of devm_gpiod_get().

Fixes: e77f847df54c ("PCI: rockchip: Add Rockchip PCIe controller support")
Fixes: 956cd99b35a8 ("PCI: rockchip: Separate common code from RC driver")
Fixes: 964bac9455be ("PCI: rockchip: Split out rockchip_pcie_parse_dt() to parse DT")
Signed-off-by: Chen-Yu Tsai <[email protected]>
---
Changes since v1:

- Rewrite subject to match existing convention and reference
'ep-gpios' DT property instead of the 'ep_gpio' field
---
drivers/pci/controller/pcie-rockchip.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/controller/pcie-rockchip.c b/drivers/pci/controller/pcie-rockchip.c
index 904dec0d3a88..c95950e9004f 100644
--- a/drivers/pci/controller/pcie-rockchip.c
+++ b/drivers/pci/controller/pcie-rockchip.c
@@ -118,7 +118,7 @@ int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
}

if (rockchip->is_rc) {
- rockchip->ep_gpio = devm_gpiod_get(dev, "ep", GPIOD_OUT_HIGH);
+ rockchip->ep_gpio = devm_gpiod_get_optional(dev, "ep", GPIOD_OUT_HIGH);
if (IS_ERR(rockchip->ep_gpio)) {
dev_err(dev, "missing ep-gpios property in node\n");
return PTR_ERR(rockchip->ep_gpio);
--
2.29.1

2020-11-18 08:54:04

by Heiko Stuebner

Subject: Re: [PATCH v2 1/4] PCI: rockchip: Make 'ep-gpios' DT property optional

Am Mittwoch, 18. November 2020, 08:17:21 CET schrieb Chen-Yu Tsai:
> From: Chen-Yu Tsai <[email protected]>
>
> The Rockchip PCIe controller DT binding clearly states that 'ep-gpios' is
> an optional property. And indeed there are boards that don't require it.
>
> Make the driver follow the binding by using devm_gpiod_get_optional()
> instead of devm_gpiod_get().
>
> Fixes: e77f847df54c ("PCI: rockchip: Add Rockchip PCIe controller support")
> Fixes: 956cd99b35a8 ("PCI: rockchip: Separate common code from RC driver")
> Fixes: 964bac9455be ("PCI: rockchip: Split out rockchip_pcie_parse_dt() to parse DT")
> Signed-off-by: Chen-Yu Tsai <[email protected]>

Reviewed-by: Heiko Stuebner <[email protected]


I'll pick up patches 2-4 separately, after giving Rob a chance to look at
the simple binding.


Heiko

> ---
> Changes since v1:
>
> - Rewrite subject to match existing convention and reference
> 'ep-gpios' DT property instead of the 'ep_gpio' field
> ---
> drivers/pci/controller/pcie-rockchip.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/pci/controller/pcie-rockchip.c b/drivers/pci/controller/pcie-rockchip.c
> index 904dec0d3a88..c95950e9004f 100644
> --- a/drivers/pci/controller/pcie-rockchip.c
> +++ b/drivers/pci/controller/pcie-rockchip.c
> @@ -118,7 +118,7 @@ int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
> }
>
> if (rockchip->is_rc) {
> - rockchip->ep_gpio = devm_gpiod_get(dev, "ep", GPIOD_OUT_HIGH);
> + rockchip->ep_gpio = devm_gpiod_get_optional(dev, "ep", GPIOD_OUT_HIGH);
> if (IS_ERR(rockchip->ep_gpio)) {
> dev_err(dev, "missing ep-gpios property in node\n");
> return PTR_ERR(rockchip->ep_gpio);
>

2020-12-07 03:34:19

by Chen-Yu Tsai

Subject: Re: [PATCH v2 1/4] PCI: rockchip: Make 'ep-gpios' DT property optional

Ping

On Wed, Nov 18, 2020 at 4:49 PM Heiko Stübner <[email protected]> wrote:
>
> Am Mittwoch, 18. November 2020, 08:17:21 CET schrieb Chen-Yu Tsai:
> > From: Chen-Yu Tsai <[email protected]>
> >
> > The Rockchip PCIe controller DT binding clearly states that 'ep-gpios' is
> > an optional property. And indeed there are boards that don't require it.
> >
> > Make the driver follow the binding by using devm_gpiod_get_optional()
> > instead of devm_gpiod_get().
> >
> > Fixes: e77f847df54c ("PCI: rockchip: Add Rockchip PCIe controller support")
> > Fixes: 956cd99b35a8 ("PCI: rockchip: Separate common code from RC driver")
> > Fixes: 964bac9455be ("PCI: rockchip: Split out rockchip_pcie_parse_dt() to parse DT")
> > Signed-off-by: Chen-Yu Tsai <[email protected]>
>
> Reviewed-by: Heiko Stuebner <[email protected]

It's been close to three weeks since this was sent.
Any chance we can get this into v5.10 or v5.11?


Regards
ChenYu

> I'll pick up patches 2-4 separately, after giving Rob a chance to look at
> the simple binding.
>
>
> Heiko
>
> > ---
> > Changes since v1:
> >
> > - Rewrite subject to match existing convention and reference
> > 'ep-gpios' DT property instead of the 'ep_gpio' field
> > ---
> > drivers/pci/controller/pcie-rockchip.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/pci/controller/pcie-rockchip.c b/drivers/pci/controller/pcie-rockchip.c
> > index 904dec0d3a88..c95950e9004f 100644
> > --- a/drivers/pci/controller/pcie-rockchip.c
> > +++ b/drivers/pci/controller/pcie-rockchip.c
> > @@ -118,7 +118,7 @@ int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
> > }
> >
> > if (rockchip->is_rc) {
> > - rockchip->ep_gpio = devm_gpiod_get(dev, "ep", GPIOD_OUT_HIGH);
> > + rockchip->ep_gpio = devm_gpiod_get_optional(dev, "ep", GPIOD_OUT_HIGH);
> > if (IS_ERR(rockchip->ep_gpio)) {
> > dev_err(dev, "missing ep-gpios property in node\n");
> > return PTR_ERR(rockchip->ep_gpio);
> >
>
>
>
>

2020-12-07 14:16:54

by Rob Herring (Arm)

Subject: Re: [PATCH v2 1/4] PCI: rockchip: Make 'ep-gpios' DT property optional

On Wed, Nov 18, 2020 at 1:17 AM Chen-Yu Tsai <[email protected]> wrote:
>
> From: Chen-Yu Tsai <[email protected]>
>
> The Rockchip PCIe controller DT binding clearly states that 'ep-gpios' is
> an optional property. And indeed there are boards that don't require it.
>
> Make the driver follow the binding by using devm_gpiod_get_optional()
> instead of devm_gpiod_get().
>
> Fixes: e77f847df54c ("PCI: rockchip: Add Rockchip PCIe controller support")
> Fixes: 956cd99b35a8 ("PCI: rockchip: Separate common code from RC driver")
> Fixes: 964bac9455be ("PCI: rockchip: Split out rockchip_pcie_parse_dt() to parse DT")
> Signed-off-by: Chen-Yu Tsai <[email protected]>
> ---
> Changes since v1:
>
> - Rewrite subject to match existing convention and reference
> 'ep-gpios' DT property instead of the 'ep_gpio' field
> ---
> drivers/pci/controller/pcie-rockchip.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/pci/controller/pcie-rockchip.c b/drivers/pci/controller/pcie-rockchip.c
> index 904dec0d3a88..c95950e9004f 100644
> --- a/drivers/pci/controller/pcie-rockchip.c
> +++ b/drivers/pci/controller/pcie-rockchip.c
> @@ -118,7 +118,7 @@ int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
> }
>
> if (rockchip->is_rc) {
> - rockchip->ep_gpio = devm_gpiod_get(dev, "ep", GPIOD_OUT_HIGH);
> + rockchip->ep_gpio = devm_gpiod_get_optional(dev, "ep", GPIOD_OUT_HIGH);
> if (IS_ERR(rockchip->ep_gpio)) {
> dev_err(dev, "missing ep-gpios property in node\n");

You should drop the error message. What it says is now never the
reason for the error and it could most likely be a deferred probe
which you don't want an error message for.

> return PTR_ERR(rockchip->ep_gpio);
> --
> 2.29.1
>

2020-12-14 04:26:03

by Chen-Yu Tsai

Subject: Re: [PATCH v2 1/4] PCI: rockchip: Make 'ep-gpios' DT property optional

On Mon, Dec 7, 2020 at 10:11 PM Rob Herring <[email protected]> wrote:
>
> On Wed, Nov 18, 2020 at 1:17 AM Chen-Yu Tsai <[email protected]> wrote:
> >
> > From: Chen-Yu Tsai <[email protected]>
> >
> > The Rockchip PCIe controller DT binding clearly states that 'ep-gpios' is
> > an optional property. And indeed there are boards that don't require it.
> >
> > Make the driver follow the binding by using devm_gpiod_get_optional()
> > instead of devm_gpiod_get().
> >
> > Fixes: e77f847df54c ("PCI: rockchip: Add Rockchip PCIe controller support")
> > Fixes: 956cd99b35a8 ("PCI: rockchip: Separate common code from RC driver")
> > Fixes: 964bac9455be ("PCI: rockchip: Split out rockchip_pcie_parse_dt() to parse DT")
> > Signed-off-by: Chen-Yu Tsai <[email protected]>
> > ---
> > Changes since v1:
> >
> > - Rewrite subject to match existing convention and reference
> > 'ep-gpios' DT property instead of the 'ep_gpio' field
> > ---
> > drivers/pci/controller/pcie-rockchip.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/pci/controller/pcie-rockchip.c b/drivers/pci/controller/pcie-rockchip.c
> > index 904dec0d3a88..c95950e9004f 100644
> > --- a/drivers/pci/controller/pcie-rockchip.c
> > +++ b/drivers/pci/controller/pcie-rockchip.c
> > @@ -118,7 +118,7 @@ int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
> > }
> >
> > if (rockchip->is_rc) {
> > - rockchip->ep_gpio = devm_gpiod_get(dev, "ep", GPIOD_OUT_HIGH);
> > + rockchip->ep_gpio = devm_gpiod_get_optional(dev, "ep", GPIOD_OUT_HIGH);
> > if (IS_ERR(rockchip->ep_gpio)) {
> > dev_err(dev, "missing ep-gpios property in node\n");
>
> You should drop the error message. What it says is now never the
> reason for the error and it could most likely be a deferred probe
> which you don't want an error message for.

What about switching to dev_err_probe() instead?

That way deferred probe errors get silenced (or get a better debug message),
and error messages for other issues, such as miswritten gpio properties are
still produced.

ChenYu

> > return PTR_ERR(rockchip->ep_gpio);
> > --
> > 2.29.1
> >