[U-Boot] [PATCH v2] rockchip: rk3188: enable remap function

[Heiko Stuebner]

Most Rockchip socs have the ability to either map the bootrom or a sram
area to the starting address of the cpu by flipping a bit in the GRF.

Newer socs leave this untouched and mapped to the bootrom but the legacy
loaders on rk3188 and before enabled the remap functionality and the
current smp implementation in the Linux kernel also requires it to be
enabled, to bring up secondary cpus.

So to keep smp working in the kernel, mimic the behaviour of the legacy
bootloaders and enable the remap functionality.

Signed-off-by: Heiko Stuebner <heiko at sntech.de>
---
changes in v2:
- drop the rk_board_late_init weak function
  If boards need even more specialized init we can worry
  about that later.

 arch/arm/mach-rockchip/Kconfig        |  1 +
 arch/arm/mach-rockchip/rk3188-board.c | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig
index af0796d1d0..5b4caec953 100644
--- a/arch/arm/mach-rockchip/Kconfig
+++ b/arch/arm/mach-rockchip/Kconfig
@@ -18,6 +18,7 @@ config ROCKCHIP_RK3188
 	select SUPPORT_TPL
 	select SPL
 	select TPL
+	select BOARD_LATE_INIT
 	select ROCKCHIP_BROM_HELPER
 	help
 	  The Rockchip RK3188 is a ARM-based SoC with a quad-core Cortex-A9
diff --git a/arch/arm/mach-rockchip/rk3188-board.c b/arch/arm/mach-rockchip/rk3188-board.c
index c370156e4c..4be711e441 100644
--- a/arch/arm/mach-rockchip/rk3188-board.c
+++ b/arch/arm/mach-rockchip/rk3188-board.c
@@ -11,6 +11,7 @@
 #include <syscon.h>
 #include <asm/io.h>
 #include <asm/arch/clock.h>
+#include <asm/arch/grf_rk3188.h>
 #include <asm/arch/periph.h>
 #include <asm/arch/pmu_rk3288.h>
 #include <asm/arch/boot_mode.h>
@@ -19,6 +20,23 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+int board_late_init(void)
+{
+	struct rk3188_grf *grf;
+
+	grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
+	if (IS_ERR(grf)) {
+		error("grf syscon returned %ld\n", PTR_ERR(grf));
+	} else {
+		/* enable noc remap to mimic legacy loaders */
+		rk_clrsetreg(&grf->soc_con0,
+			NOC_REMAP_MASK << NOC_REMAP_SHIFT,
+			NOC_REMAP_MASK << NOC_REMAP_SHIFT);
+	}
+
+	return 0;
+}
+
 int board_init(void)
 {
 #if defined(CONFIG_ROCKCHIP_SPL_BACK_TO_BROM)
-- 
2.11.0