When Drew took over the pinctrl driver he must have changed
all the -ENOTSUPP returns into -EOPNOTSUPP. This subtle change
was most likely not spotted because it was never mentioned in the
changelog of the patchset, but it breaks all the places in the
pin control and GPIO frameworks where -ENOTSUPP is expected.

Fixes: bed5cd6f8a98 ("pinctrl: Add driver for the T-Head TH1520 SoC")
Signed-off-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>
---
 drivers/pinctrl/pinctrl-th1520.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-th1520.c b/drivers/pinctrl/pinctrl-th1520.c
index c8d2ee6defa7..03326df69668 100644
--- a/drivers/pinctrl/pinctrl-th1520.c
+++ b/drivers/pinctrl/pinctrl-th1520.c
@@ -591,7 +591,7 @@ static int th1520_pinconf_get(struct pinctrl_dev *pctldev,
 	u32 arg;
 
 	if ((uintptr_t)desc->drv_data & TH1520_PAD_NO_PADCFG)
-		return -EOPNOTSUPP;
+		return -ENOTSUPP;
 
 	value = readl_relaxed(th1520_padcfg(thp, pin));
 	value = (value >> th1520_padcfg_shift(pin)) & GENMASK(9, 0);
@@ -636,7 +636,7 @@ static int th1520_pinconf_get(struct pinctrl_dev *pctldev,
 		arg = enabled ? 1 : 0;
 		break;
 	default:
-		return -EOPNOTSUPP;
+		return -ENOTSUPP;
 	}
 
 	*config = pinconf_to_config_packed(param, arg);
@@ -661,7 +661,7 @@ static int th1520_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
 	u16 mask, value;
 
 	if ((uintptr_t)desc->drv_data & TH1520_PAD_NO_PADCFG)
-		return -EOPNOTSUPP;
+		return -ENOTSUPP;
 
 	mask = 0;
 	value = 0;
@@ -676,14 +676,14 @@ static int th1520_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
 			break;
 		case PIN_CONFIG_BIAS_PULL_DOWN:
 			if (arg == 0)
-				return -EOPNOTSUPP;
+				return -ENOTSUPP;
 			mask |= TH1520_PADCFG_BIAS;
 			value &= ~TH1520_PADCFG_BIAS;
 			value |= TH1520_PADCFG_PE;
 			break;
 		case PIN_CONFIG_BIAS_PULL_UP:
 			if (arg == 0)
-				return -EOPNOTSUPP;
+				return -ENOTSUPP;
 			mask |= TH1520_PADCFG_BIAS;
 			value &= ~TH1520_PADCFG_BIAS;
 			if (arg == TH1520_PULL_STRONG_OHM)
@@ -718,7 +718,7 @@ static int th1520_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
 				value &= ~TH1520_PADCFG_SL;
 			break;
 		default:
-			return -EOPNOTSUPP;
+			return -ENOTSUPP;
 		}
 	}
 
-- 
2.43.0

On Fri, Oct 11, 2024 at 04:48:23PM +0200, Emil Renner Berthing wrote:
> When Drew took over the pinctrl driver he must have changed
> all the -ENOTSUPP returns into -EOPNOTSUPP. This subtle change
> was most likely not spotted because it was never mentioned in the
> changelog of the patchset, but it breaks all the places in the
> pin control and GPIO frameworks where -ENOTSUPP is expected.
> 
> Fixes: bed5cd6f8a98 ("pinctrl: Add driver for the T-Head TH1520 SoC")
> Signed-off-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>
> ---
>  drivers/pinctrl/pinctrl-th1520.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/pinctrl/pinctrl-th1520.c b/drivers/pinctrl/pinctrl-th1520.c
> index c8d2ee6defa7..03326df69668 100644
> --- a/drivers/pinctrl/pinctrl-th1520.c
> +++ b/drivers/pinctrl/pinctrl-th1520.c
> @@ -591,7 +591,7 @@ static int th1520_pinconf_get(struct pinctrl_dev *pctldev,
>  	u32 arg;
>  
>  	if ((uintptr_t)desc->drv_data & TH1520_PAD_NO_PADCFG)
> -		return -EOPNOTSUPP;
> +		return -ENOTSUPP;
>  
>  	value = readl_relaxed(th1520_padcfg(thp, pin));
>  	value = (value >> th1520_padcfg_shift(pin)) & GENMASK(9, 0);
> @@ -636,7 +636,7 @@ static int th1520_pinconf_get(struct pinctrl_dev *pctldev,
>  		arg = enabled ? 1 : 0;
>  		break;
>  	default:
> -		return -EOPNOTSUPP;
> +		return -ENOTSUPP;
>  	}
>  
>  	*config = pinconf_to_config_packed(param, arg);
> @@ -661,7 +661,7 @@ static int th1520_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
>  	u16 mask, value;
>  
>  	if ((uintptr_t)desc->drv_data & TH1520_PAD_NO_PADCFG)
> -		return -EOPNOTSUPP;
> +		return -ENOTSUPP;
>  
>  	mask = 0;
>  	value = 0;
> @@ -676,14 +676,14 @@ static int th1520_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
>  			break;
>  		case PIN_CONFIG_BIAS_PULL_DOWN:
>  			if (arg == 0)
> -				return -EOPNOTSUPP;
> +				return -ENOTSUPP;
>  			mask |= TH1520_PADCFG_BIAS;
>  			value &= ~TH1520_PADCFG_BIAS;
>  			value |= TH1520_PADCFG_PE;
>  			break;
>  		case PIN_CONFIG_BIAS_PULL_UP:
>  			if (arg == 0)
> -				return -EOPNOTSUPP;
> +				return -ENOTSUPP;
>  			mask |= TH1520_PADCFG_BIAS;
>  			value &= ~TH1520_PADCFG_BIAS;
>  			if (arg == TH1520_PULL_STRONG_OHM)
> @@ -718,7 +718,7 @@ static int th1520_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
>  				value &= ~TH1520_PADCFG_SL;
>  			break;
>  		default:
> -			return -EOPNOTSUPP;
> +			return -ENOTSUPP;
>  		}
>  	}
>  
> -- 
> 2.43.0
> 

Reviewed-by: Drew Fustini <dfustini@tenstorrent.com>

Thanks for the fix. This was something I changed due to checkpatch
("ENOTSUPP is not a SUSV4 error code, prefer EOPNOTSUPP") wihtout
realizing the implication.

-Drew