drm/panel: Add driver for the Toppoly TD043MTEA1 panel

This panel is used on the OMAP3 Pandora.

The code is based on the omapdrm-specific panel-tpo-td043mtea1 driver.

v2:
- fix checkpatch warnings
  o (lcd == NULL) => (!lcd) (sam)
  o alignment to open '(' (sam)

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190813201101.30980-10-laurent.pinchart@ideasonboard.com

drivers/gpu/drm/panel/Kconfig

@@ -332,6 +332,13 @@ config DRM_PANEL_TPO_TD028TTEC1
 	  Say Y here if you want to enable support for TPO TD028TTEC1 480x640
 	  2.8" panel (found on the OpenMoko Neo FreeRunner and Neo 1973).
 
+config DRM_PANEL_TPO_TD043MTEA1
+	tristate "Toppoly (TPO) TD043MTEA1 panel driver"
+	depends on GPIOLIB && OF && REGULATOR && SPI
+	help
+	  Say Y here if you want to enable support for TPO TD043MTEA1 800x480
+	  4.3" panel (found on the OMAP3 Pandora board).
+
 config DRM_PANEL_TPO_TPG110
 	tristate "TPO TPG 800x400 panel"
 	depends on OF && SPI && GPIOLIB

drivers/gpu/drm/panel/Makefile

@@ -35,5 +35,6 @@ obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7701) += panel-sitronix-st7701.o
 obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7789V) += panel-sitronix-st7789v.o
 obj-$(CONFIG_DRM_PANEL_SONY_ACX565AKM) += panel-sony-acx565akm.o
 obj-$(CONFIG_DRM_PANEL_TPO_TD028TTEC1) += panel-tpo-td028ttec1.o
+obj-$(CONFIG_DRM_PANEL_TPO_TD043MTEA1) += panel-tpo-td043mtea1.o
 obj-$(CONFIG_DRM_PANEL_TPO_TPG110) += panel-tpo-tpg110.o
 obj-$(CONFIG_DRM_PANEL_TRULY_NT35597_WQXGA) += panel-truly-nt35597.o

drivers/gpu/drm/panel/panel-tpo-td028ttec1.c

@@ -328,7 +328,7 @@ static int td028ttec1_probe(struct spi_device *spi)
 	int ret;
 
 	lcd = devm_kzalloc(&spi->dev, sizeof(*lcd), GFP_KERNEL);
-	if (lcd == NULL)
+	if (!lcd)
 		return -ENOMEM;
 
 	spi_set_drvdata(spi, lcd);