[RFC 2/2] staging: fbtft: use symbolic error messages

[Edmundo Carmona Antoranz <eantoranz@xxxxxxxxx>]

Modify some error messages so that the symbolic error value be
printed instead of a numeric value.
---
 drivers/staging/fbtft/fb_ssd1351.c   | 3 +--
 drivers/staging/fbtft/fb_watterott.c | 3 +--
 drivers/staging/fbtft/fbtft-core.c   | 5 ++---
 3 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/fbtft/fb_ssd1351.c b/drivers/staging/fbtft/fb_ssd1351.c
index 900b28d826b2..adf486b36289 100644
--- a/drivers/staging/fbtft/fb_ssd1351.c
+++ b/drivers/staging/fbtft/fb_ssd1351.c
@@ -223,8 +223,7 @@ static void register_onboard_backlight(struct fbtft_par *par)
 				       &bl_props);
 	if (IS_ERR(bd)) {
 		dev_err(par->info->device,
-			"cannot register backlight device (%ld)\n",
-			PTR_ERR(bd));
+			"cannot register backlight device (%pe)\n", bd);
 		return;
 	}
 	par->info->bl_dev = bd;
diff --git a/drivers/staging/fbtft/fb_watterott.c b/drivers/staging/fbtft/fb_watterott.c
index 76b25df376b8..f9ecc5202c47 100644
--- a/drivers/staging/fbtft/fb_watterott.c
+++ b/drivers/staging/fbtft/fb_watterott.c
@@ -263,8 +263,7 @@ static void register_chip_backlight(struct fbtft_par *par)
 				       &bl_props);
 	if (IS_ERR(bd)) {
 		dev_err(par->info->device,
-			"cannot register backlight device (%ld)\n",
-			PTR_ERR(bd));
+			"cannot register backlight device (%pe)\n", bd);
 		return;
 	}
 	par->info->bl_dev = bd;
diff --git a/drivers/staging/fbtft/fbtft-core.c b/drivers/staging/fbtft/fbtft-core.c
index 4f362dad4436..4d96ab2ea71c 100644
--- a/drivers/staging/fbtft/fbtft-core.c
+++ b/drivers/staging/fbtft/fbtft-core.c
@@ -83,7 +83,7 @@ static int fbtft_request_one_gpio(struct fbtft_par *par,
 	if (IS_ERR(*gpiop)) {
 		ret = PTR_ERR(*gpiop);
 		dev_err(dev,
-			"Failed to request %s GPIO: %d\n", name, ret);
+			"Failed to request %s GPIO: %pe\n", name, *gpiop);
 		return ret;
 	}
 	fbtft_par_dbg(DEBUG_REQUEST_GPIOS, par, "%s: '%s' GPIO\n",
@@ -194,8 +194,7 @@ void fbtft_register_backlight(struct fbtft_par *par)
 				       &fbtft_bl_ops, &bl_props);
 	if (IS_ERR(bd)) {
 		dev_err(par->info->device,
-			"cannot register backlight device (%ld)\n",
-			PTR_ERR(bd));
+			"cannot register backlight device (%pe)\n", bd);
 		return;
 	}
 	par->info->bl_dev = bd;
-- 
2.30.2