core: add support for U_BOOT_DRIVER_ALIAS

Currently when using OF_PLATDATA the binding between devices and drivers
is done trying to match the compatible string in the node with a driver
name. However, usually a single driver supports multiple compatible strings
which causes that only devices which its compatible string matches a
driver name get bound.

To overcome this issue, this patch adds the U_BOOT_DRIVER_ALIAS macro,
which generates no code at all, but allows an easy way to declare driver
name aliases. Thanks to this, dtoc could be improve to look for the driver
name based on its alias when it populates the U_BOOT_DEVICE entry.

Signed-off-by: Walter Lozano <walter.lozano@collabora.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

drivers/clk/at91/pmc.c

@@ -31,6 +31,8 @@ U_BOOT_DRIVER(atmel_at91rm9200_pmc) = {
 	.of_match = at91_pmc_match,
 };
 
+U_BOOT_DRIVER_ALIAS(atmel_at91rm9200_pmc, atmel_at91sam9260_pmc)
+
 /*---------------------------------------------------------*/
 
 int at91_pmc_core_probe(struct udevice *dev)

drivers/gpio/mxs_gpio.c

@@ -311,4 +311,6 @@ U_BOOT_DRIVER(fsl_imx23_gpio) = {
 	.ofdata_to_platdata = mxs_ofdata_to_platdata,
 #endif
 };
+
+U_BOOT_DRIVER_ALIAS(fsl_imx23_gpio, fsl_imx28_gpio)
 #endif /* DM_GPIO */

drivers/gpio/sandbox.c

@@ -254,6 +254,8 @@ U_BOOT_DRIVER(sandbox_gpio) = {
 	.ops	= &gpio_sandbox_ops,
 };
 
+U_BOOT_DRIVER_ALIAS(sandbox_gpio, sandbox_gpio_alias)
+
 /* pincontrol: used only to check GPIO pin configuration (pinmux command) */
 
 struct sb_pinctrl_priv {

drivers/i2c/rk_i2c.c

@@ -494,3 +494,5 @@ U_BOOT_DRIVER(rockchip_rk3066_i2c) = {
 	.priv_auto_alloc_size = sizeof(struct rk_i2c),
 	.ops	= &rockchip_i2c_ops,
 };
+
+U_BOOT_DRIVER_ALIAS(rockchip_rk3066_i2c, rockchip_rk3288_i2c)

drivers/mmc/mxsmmc.c

@@ -727,4 +727,5 @@ U_BOOT_DRIVER(fsl_imx23_mmc) = {
 	.platdata_auto_alloc_size = sizeof(struct mxsmmc_platdata),
 };
 
+U_BOOT_DRIVER_ALIAS(fsl_imx23_mmc, fsl_imx28_mmc)
 #endif /* CONFIG_DM_MMC */

drivers/mmc/rockchip_dw_mmc.c

@@ -180,6 +180,9 @@ U_BOOT_DRIVER(rockchip_rk3288_dw_mshc) = {
 	.platdata_auto_alloc_size = sizeof(struct rockchip_mmc_plat),
 };
 
+U_BOOT_DRIVER_ALIAS(rockchip_rk3288_dw_mshc, rockchip_rk3328_dw_mshc)
+U_BOOT_DRIVER_ALIAS(rockchip_rk3288_dw_mshc, rockchip_rk3368_dw_mshc)
+
 #ifdef CONFIG_PWRSEQ
 static int rockchip_dwmmc_pwrseq_set_power(struct udevice *dev, bool enable)
 {

drivers/mtd/spi/sf_probe.c

@@ -170,4 +170,6 @@ U_BOOT_DRIVER(jedec_spi_nor) = {
 	.ops		= &spi_flash_std_ops,
 };
 
+U_BOOT_DRIVER_ALIAS(jedec_spi_nor, spansion_m25p16)
+
 #endif /* CONFIG_DM_SPI_FLASH */

drivers/pinctrl/nxp/pinctrl-mxs.c

@@ -191,3 +191,5 @@ U_BOOT_DRIVER(fsl_imx23_pinctrl) = {
 	.priv_auto_alloc_size = sizeof(struct mxs_pinctrl_priv),
 	.ops = &mxs_pinctrl_ops,
 };
+
+U_BOOT_DRIVER_ALIAS(fsl_imx23_pinctrl, fsl_imx28_pinctrl)

drivers/pinctrl/pinctrl-at91.c

@@ -527,3 +527,5 @@ U_BOOT_DRIVER(atmel_sama5d3_pinctrl) = {
 	.priv_auto_alloc_size = sizeof(struct at91_pinctrl_priv),
 	.ops = &at91_pinctrl_ops,
 };
+
+U_BOOT_DRIVER_ALIAS(atmel_sama5d3_pinctrl, atmel_at91rm9200_pinctrl)

drivers/power/pmic/rk8xx.c

@@ -194,3 +194,5 @@ U_BOOT_DRIVER(rockchip_rk805) = {
 	.probe = rk8xx_probe,
 	.ops = &rk8xx_ops,
 };
+
+U_BOOT_DRIVER_ALIAS(rockchip_rk805, rockchip_rk808)

drivers/serial/ns16550.c

@@ -620,6 +620,10 @@ U_BOOT_DRIVER(ns16550_serial) = {
 	.flags	= DM_FLAG_PRE_RELOC,
 #endif
 };
+
+U_BOOT_DRIVER_ALIAS(ns16550_serial, rockchip_rk3328_uart)
+U_BOOT_DRIVER_ALIAS(ns16550_serial, rockchip_rk3368_uart)
+U_BOOT_DRIVER_ALIAS(ns16550_serial, ti_da830_uart)
 #endif
 #endif /* SERIAL_PRESENT */
 

drivers/spi/mxs_spi.c

@@ -498,3 +498,5 @@ U_BOOT_DRIVER(fsl_imx23_spi) = {
 	.priv_auto_alloc_size = sizeof(struct mxs_spi_priv),
 	.probe	= mxs_spi_probe,
 };
+
+U_BOOT_DRIVER_ALIAS(fsl_imx23_spi, fsl_imx28_spi)

drivers/spi/rk_spi.c

@@ -563,3 +563,5 @@ U_BOOT_DRIVER(rockchip_rk3288_spi) = {
 	.priv_auto_alloc_size = sizeof(struct rockchip_spi_priv),
 	.probe	= rockchip_spi_probe,
 };
+
+U_BOOT_DRIVER_ALIAS(rockchip_rk3288_spi, rockchip_rk3368_spi)

include/dm/device.h

@@ -282,6 +282,13 @@ struct driver {
 #define DM_GET_DRIVER(__name)						\
 	ll_entry_get(struct driver, __name, driver)
 
+/**
+ * Declare a macro to state a alias for a driver name. This macro will
+ * produce no code but its information will be parsed by tools like
+ * dtoc
+ */
+#define U_BOOT_DRIVER_ALIAS(__name, __alias)
+
 /**
  * dev_get_platdata() - Get the platform data for a device
  *