MLK-10774-1 imx: LDO: add LDO bypass

This patch is from two commits:
1.
748eac71fde78aa0c2e8cb3a3bab94bd994c06f5
ENGR00315499-5: Support i.MX6 1.2GHz via LDO bypass

Add check for 1.2GHz core speed. If Speed grading fuse is for 1.2GHz,
enable LDO bypass and setup PMIC voltages. LDO bypass is dependent
on the flatten device tree file.

2.
93d457e4c601ee5266bc30b7dfa5fa1bbfa8500a
MLK-9891-1: ARM: imx6: split WDOG_B setting from set_anatop_bypass() function

We set WDOG_B in set_anatop_bypass() before, because it is the only case, but now
on i.mx6sabreauto board, we didn't use ldo-bypass mode, but have to use WDOG_B to
reboot whole board, so split these code to independent function so that board file
can call it freely.

Board code is not included, board ldo bypass code will be in bsp update code.

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/arch/arm/include/asm/arch-mx6/sys_proto.h b/arch/arm/include/asm/arch-mx6/sys_proto.h
index 28ba844..10bab2b 100644
--- a/arch/arm/include/asm/arch-mx6/sys_proto.h
+++ b/arch/arm/include/asm/arch-mx6/sys_proto.h
@@ -27,6 +27,16 @@ u32 get_cpu_rev(void);
 const char *get_imx_type(u32 imxtype);
 unsigned imx_ddr_size(void);
 void set_chipselect_size(int const);
+void set_wdog_reset(struct wdog_regs *wdog);
+
+#ifdef CONFIG_LDO_BYPASS_CHECK
+int check_ldo_bypass(void);
+int check_1_2G(void);
+int set_anatop_bypass(int wdog_reset_pin);
+void ldo_mode_set(int ldo_bypass);
+void prep_anatop_bypass(void);
+void finish_anatop_bypass(void);
+#endif
 
 /*
  * Initializes on-chip ethernet controllers.