imx: mx6ul configure the PMIC_STBY_REQ pin as open drain

Configure the PMIC_STBY_REQ pin as open drain 100K according
to the design team's requirement for the PMIC_STBY_REQ pin
for i.MX 6UltraLite TO1.0.

Signed-off-by: Peng Fan <van.freenix@gmail.com>
Cc: Stefano Babic <sbabic@denx.de>

diff --git a/arch/arm/cpu/armv7/mx6/soc.c b/arch/arm/cpu/armv7/mx6/soc.c
index f29901f8cc70ee36f2ce96b1a94203e8d908874b..d4b22ad7f315072c8df91be9c3b214c15879eeb7 100644 (file)
--- a/arch/arm/cpu/armv7/mx6/soc.c
+++ b/arch/arm/cpu/armv7/mx6/soc.c
@@ -341,7 +341,17 @@ int arch_cpu_init(void)
                        set_ahb_rate(132000000);
        }
 
-               /* Set perclk to source from OSC 24MHz */
+       if (IS_ENABLED(CONFIG_MX6UL) && is_soc_rev(CHIP_REV_1_0) == 0) {
+               /*
+                * According to the design team's requirement on i.MX6UL,
+                * the PMIC_STBY_REQ PAD should be configured as open
+                * drain 100K (0x0000b8a0).
+                * Only exists on TO1.0
+                */
+               writel(0x0000b8a0, IOMUXC_BASE_ADDR + 0x29c);
+       }
+
+       /* Set perclk to source from OSC 24MHz */
 #if defined(CONFIG_MX6SL)
        set_preclk_from_osc();
 #endif