ARM: at91: spl: Adjust switching to oscillator for SAMA5D2

[u-boot] / arch / arm / mach-at91 / spl_atmel.c

diff --git a/arch/arm/mach-at91/spl_atmel.c b/arch/arm/mach-at91/spl_atmel.c
index 9cc1111234a16f723519281bbd3fd4f7aae7a531..ce16ef3bdb71eb376e7db24847fbd876ea6eed29 100644 (file)
--- a/arch/arm/mach-at91/spl_atmel.c
+++ b/arch/arm/mach-at91/spl_atmel.c
@@ -32,6 +32,20 @@ static void switch_to_main_crystal_osc(void)
        while (!(readl(&pmc->sr) & AT91_PMC_IXR_MOSCS))
                ;
 
+#if defined(CONFIG_SAMA5D2)
+       /* Enable a measurement of the external oscillator */
+       tmp = readl(&pmc->mcfr);
+       tmp |= AT91_PMC_MCFR_CCSS_XTAL_OSC;
+       tmp |= AT91_PMC_MCFR_RCMEAS;
+       writel(tmp, &pmc->mcfr);
+
+       while (!(readl(&pmc->mcfr) & AT91_PMC_MCFR_MAINRDY))
+               ;
+
+       if (!(readl(&pmc->mcfr) & AT91_PMC_MCFR_MAINF_MASK))
+               hang();
+#endif
+
        tmp = readl(&pmc->mor);
        tmp &= ~AT91_PMC_MOR_OSCBYPASS;
        tmp &= ~AT91_PMC_MOR_KEY(0xff);
@@ -47,11 +61,13 @@ static void switch_to_main_crystal_osc(void)
        while (!(readl(&pmc->sr) & AT91_PMC_IXR_MOSCSELS))
                ;
 
+#if !defined(CONFIG_SAMA5D2)
        /* Wait until MAINRDY field is set to make sure main clock is stable */
        while (!(readl(&pmc->mcfr) & AT91_PMC_MAINRDY))
                ;
+#endif
 
-#ifndef CONFIG_SAMA5D4
+#if !defined(CONFIG_SAMA5D4) && !defined(CONFIG_SAMA5D2)
        tmp = readl(&pmc->mor);
        tmp &= ~AT91_PMC_MOR_MOSCRCEN;
        tmp &= ~AT91_PMC_MOR_KEY(0xff);
@@ -70,10 +86,21 @@ __weak void redirect_int_from_saic_to_aic(void)
        /* This only be used for sama5d4 soc now */
 }
 
+/* empty stub to satisfy current lowlevel_init, can be removed any time */
 void s_init(void)
 {
+}
+
+void board_init_f(ulong dummy)
+{
+       int ret;
+
        switch_to_main_crystal_osc();
 
+#ifdef CONFIG_SAMA5D2
+       configure_2nd_sram_as_l2_cache();
+#endif
+
        /* disable watchdog */
        at91_disable_wdt();
 
@@ -90,7 +117,14 @@ void s_init(void)
 
        board_early_init_f();
 
+       mem_init();
+
+       ret = spl_init();
+       if (ret) {
+               debug("spl_init() failed: %d\n", ret);
+               hang();
+       }
+
        preloader_console_init();
 
-       mem_init();
 }