da850: provide davinci_enable_uart0

this is needed to bring UART0 out of reset but this function
currently only exists for dm644x/355/365/646x when da850 (at
least am1808 also need it).

Signed-off-by: Eric Bénard <eric@eukrea.com>

arch/arm/cpu/arm926ejs/davinci/da850_lowlevel.c

@@ -32,6 +32,14 @@
 #include <asm/arch/emif_defs.h>
 #include <asm/arch/pll_defs.h>
 
+void davinci_enable_uart0(void)
+{
+	lpsc_on(DAVINCI_LPSC_UART0);
+
+	/* Bringup UART0 out of reset */
+	REG(UART0_PWREMU_MGMT) = 0x00006001;
+}
+
 #if defined(CONFIG_SYS_DA850_PLL_INIT)
 void da850_waitloop(unsigned long loopcnt)
 {

arch/arm/include/asm/arch-davinci/hardware.h

@@ -346,6 +346,8 @@ void davinci_errata_workarounds(void);
 #define PSC_PSC0_MODULE_ID_CNT		16
 #define PSC_PSC1_MODULE_ID_CNT		32
 
+#define UART0_PWREMU_MGMT		(0x01c42030)
+
 struct davinci_psc_regs {
 	dv_reg	revid;
 	dv_reg	rsvd0[71];