staging: fbtft: add macro FBTFT_REGISTER_SPI_DRIVER

After 5fa6863b ("spi: Check we have a spi_device_id for each DT
compatible") we need to add spi id_tables. Changing existing macro
FBTFT_REGISTER_DRIVER would have meant to change arguments and
therefore adjust all fbtft drivers.

This patch adds a new and simplified macro FBTFT_REGISTER_SPI_DRIVER
that includes a spi id_table, and in addition to that:
- does not define a platform driver
- uses macro module_spi_driver()
Signed-off-by: NHeiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/a58b3bc9-27a2-3f16-dd92-e597666a0263@gmail.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/fbtft/fbtft.h

@@ -346,6 +346,47 @@ static void __exit fbtft_driver_module_exit(void)                          \
 module_init(fbtft_driver_module_init);                                     \
 module_exit(fbtft_driver_module_exit);
 
+#define FBTFT_REGISTER_SPI_DRIVER(_name, _comp_vend, _comp_dev, _display)	\
+										\
+static int fbtft_driver_probe_spi(struct spi_device *spi)			\
+{										\
+	return fbtft_probe_common(_display, spi, NULL);				\
+}										\
+										\
+static int fbtft_driver_remove_spi(struct spi_device *spi)			\
+{										\
+	struct fb_info *info = spi_get_drvdata(spi);				\
+										\
+	fbtft_remove_common(&spi->dev, info);					\
+	return 0;								\
+}										\
+										\
+static const struct of_device_id dt_ids[] = {					\
+	{ .compatible = _comp_vend "," _comp_dev },				\
+	{},									\
+};										\
+										\
+MODULE_DEVICE_TABLE(of, dt_ids);						\
+										\
+static const struct spi_device_id spi_ids[] = {					\
+	{ .name = _comp_dev },							\
+	{},									\
+};										\
+										\
+MODULE_DEVICE_TABLE(spi, spi_ids);						\
+										\
+static struct spi_driver fbtft_driver_spi_driver = {				\
+	.driver = {								\
+		.name  = _name,							\
+		.of_match_table = dt_ids,					\
+	},									\
+	.id_table = spi_ids,							\
+	.probe  = fbtft_driver_probe_spi,					\
+	.remove = fbtft_driver_remove_spi,					\
+};										\
+										\
+module_spi_driver(fbtft_driver_spi_driver);
+
 /* Debug macros */
 
 /* shorthand debug levels */