arm: lpc32xx: switch SPL builds to driver model

For NXP LPC32xx boards the change enables SPL_DM option, this allows
to use any driver model UART driver in SPL images, hence a restriction
on HSUART in SPL image is removed and well as definitions for non-DM
NS16550 driver, its DM version is used instead.

Because SPL_DM requires malloc(), enable CONFIG_SPL_SYS_MALLOC_SIMPLE
for LPC32xx boards.

The change adds about 5KB to the resulting SPL image (for devkit3250
board SPL image is increased from 10672 to 15608 bytes).
Signed-off-by: NVladimir Zapolskiy <vz@mleia.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

arch/arm/cpu/arm926ejs/lpc32xx/devices.c

@@ -43,7 +43,7 @@ void lpc32xx_uart_init(unsigned int uart_id)
 	       &clk->u3clk + (uart_id - 3));
 }
 
-#if !CONFIG_IS_ENABLED(OF_CONTROL) && !defined(CONFIG_SPL_BUILD)
+#if !CONFIG_IS_ENABLED(OF_CONTROL)
 static const struct ns16550_platdata lpc32xx_uart[] = {
 	{ UART3_BASE, 2, CONFIG_SYS_NS16550_CLK },
 	{ UART4_BASE, 2, CONFIG_SYS_NS16550_CLK },

arch/arm/include/asm/arch-lpc32xx/config.h

@@ -18,33 +18,16 @@
 /* UART configuration */
 #if	(CONFIG_SYS_LPC32XX_UART == 1) || (CONFIG_SYS_LPC32XX_UART == 2) || \
 	(CONFIG_SYS_LPC32XX_UART == 7)
-#if defined(CONFIG_SPL_BUILD)
-/* SPL images do not support LPC32xx HSUART, UART5 is selected for SPL */
-#undef CONFIG_SYS_LPC32XX_UART
-#define CONFIG_SYS_LPC32XX_UART		5
-#endif
-
 #if !defined(CONFIG_LPC32XX_HSUART)
 #define CONFIG_LPC32XX_HSUART
 #endif
 #endif
 
-#if defined(CONFIG_SPL_BUILD)
-#define CONFIG_SYS_NS16550_SERIAL
-#define CONFIG_SYS_NS16550_REG_SIZE	-4
-#define CONFIG_SYS_NS16550_CLK		get_serial_clock()
-
-#define CONFIG_SYS_NS16550_COM1		UART3_BASE
-#define CONFIG_SYS_NS16550_COM2		UART4_BASE
-#define CONFIG_SYS_NS16550_COM3		UART5_BASE
-#define CONFIG_SYS_NS16550_COM4		UART6_BASE
-#endif
-
 #if !defined(CONFIG_SYS_NS16550_CLK)
 #define CONFIG_SYS_NS16550_CLK		13000000
 #endif
 
-#if !defined(CONFIG_LPC32XX_HSUART) || defined(CONFIG_SPL_BUILD)
+#if !defined(CONFIG_LPC32XX_HSUART)
 #define CONFIG_CONS_INDEX		(CONFIG_SYS_LPC32XX_UART - 2)
 #else
 #define CONFIG_CONS_INDEX		CONFIG_SYS_LPC32XX_UART

configs/devkit3250_defconfig

 CONFIG_ARM=y
 CONFIG_TARGET_DEVKIT3250=y
+CONFIG_SPL_SYS_MALLOC_SIMPLE=y
+CONFIG_SPL_DM=y
 CONFIG_DM_SERIAL=y
 CONFIG_DM_GPIO=y
 CONFIG_SPL=y

configs/work_92105_defconfig

 CONFIG_ARM=y
 CONFIG_TARGET_WORK_92105=y
+CONFIG_SPL_SYS_MALLOC_SIMPLE=y
+CONFIG_SPL_DM=y
 CONFIG_DM_SERIAL=y
 CONFIG_DM_GPIO=y
 CONFIG_SPL=y