[U-Boot] [PATCH v3 1/4] arm: imx: cx9020: remove usage of mx53_dram_size

[linux-kernel-dev at beckhoff.com <linux-kernel-dev@beckhoff.com>]

From: Patrick Bruenn <p.bruenn@beckhoff.com>

Static variables are not available during board_init_f().
'static uint32_t mx53_dram_size[2];' was used in board specific
dram_init(), dram_init_banksize() and get_effective_memsize() to avoid
multiple calls to get_ram_size().

However multiple calls are better than undefined behavior...
This fixes:
https://lists.denx.de/pipermail/u-boot/2017-November/313214.html
https://lists.denx.de/pipermail/u-boot/2017-December/314480.html

Signed-off-by: Patrick Bruenn <p.bruenn@beckhoff.com>

---

Changes in v3:
- rebase to v2018.01
- fix the cover-letter to make it more clear that the first patch is
  required to make the cx9020 boot again. All other patches are
  optional.

Changes in v2:
- move dram initialization into common location
- reuse fixed dram initialization for m53evk and mx53loco

 board/beckhoff/mx53cx9020/mx53cx9020.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/board/beckhoff/mx53cx9020/mx53cx9020.c b/board/beckhoff/mx53cx9020/mx53cx9020.c
index 021bd967c4..d8bdfc27bb 100644
--- a/board/beckhoff/mx53cx9020/mx53cx9020.c
+++ b/board/beckhoff/mx53cx9020/mx53cx9020.c
@@ -59,8 +59,6 @@ static const u32 CCAT_MODE_RUN = 0x0033DC8F;
 
 DECLARE_GLOBAL_DATA_PTR;
 
-static uint32_t mx53_dram_size[2];
-
 phys_size_t get_effective_memsize(void)
 {
 	/*
@@ -74,15 +72,13 @@ phys_size_t get_effective_memsize(void)
 	 * U-Boot into invalid memory area close to the end of the first
 	 * DRAM bank.
 	 */
-	return mx53_dram_size[0];
+	return get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
 }
 
 int dram_init(void)
 {
-	mx53_dram_size[0] = get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
-	mx53_dram_size[1] = get_ram_size((void *)PHYS_SDRAM_2, 1 << 30);
-
-	gd->ram_size = mx53_dram_size[0] + mx53_dram_size[1];
+	gd->ram_size = get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
+	gd->ram_size += get_ram_size((void *)PHYS_SDRAM_2, 1 << 30);
 
 	return 0;
 }
@@ -90,10 +86,10 @@ int dram_init(void)
 int dram_init_banksize(void)
 {
 	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
-	gd->bd->bi_dram[0].size = mx53_dram_size[0];
+	gd->bd->bi_dram[0].size = get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
 
 	gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
-	gd->bd->bi_dram[1].size = mx53_dram_size[1];
+	gd->bd->bi_dram[1].size = get_ram_size((void *)PHYS_SDRAM_2, 1 << 30);
 
 	return 0;
 }
-- 
2.11.0