ARM: OMAP5/AM43xx: remove enabling USB clocks from enable_basic_clocks()

[oweals/u-boot.git] / arch / arm / cpu / armv7 / lowlevel_init.S

diff --git a/arch/arm/cpu/armv7/lowlevel_init.S b/arch/arm/cpu/armv7/lowlevel_init.S
index 0d45528e999ee021799bc3556ca0059d1df5ad9b..1872c57699577bcf107753fb48ff1a2dbde63ac1 100644 (file)
--- a/arch/arm/cpu/armv7/lowlevel_init.S
+++ b/arch/arm/cpu/armv7/lowlevel_init.S
@@ -8,23 +8,7 @@
  * Author :
  *     Aneesh V        <aneesh@ti.com>
  *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier:    GPL-2.0+
  */
 
 #include <asm-offsets.h>
@@ -33,18 +17,42 @@
 
 ENTRY(lowlevel_init)
        /*
-        * Setup a temporary stack
+        * Setup a temporary stack. Global data is not available yet.
         */
        ldr     sp, =CONFIG_SYS_INIT_SP_ADDR
        bic     sp, sp, #7 /* 8-byte alignment for ABI compliance */
-
+#ifdef CONFIG_SPL_DM
+       mov     r9, #0
+#else
+       /*
+        * Set up global data for boards that still need it. This will be
+        * removed soon.
+        */
+#ifdef CONFIG_SPL_BUILD
+       ldr     r9, =gdata
+#else
+       sub     sp, sp, #GD_SIZE
+       bic     sp, sp, #7
+       mov     r9, sp
+#endif
+#endif
        /*
         * Save the old lr(passed in ip) and the current lr to stack
         */
        push    {ip, lr}
 
        /*
-        * go setup pll, mux, memory
+        * Call the very early init function. This should do only the
+        * absolute bare minimum to get started. It should not:
+        *
+        * - set up DRAM
+        * - use global_data
+        * - clear BSS
+        * - try to start a console
+        *
+        * For boards with SPL this should be empty since SPL can do all of
+        * this init in the SPL board_init_f() function which is called
+        * immediately after this.
         */
        bl      s_init
        pop     {ip, pc}