Adoption of U-Boot commit:
| commit b4a2cdc13ed886b981e8fcd3087293ba9296f17f
| Author: Marek Vasut <marex@xxxxxxx>
| Date: Tue Oct 15 18:26:57 2019 +0200
|
| arm: mxs: Increase VDDD voltage to match specification
|
| According to IMX28CEC rev. 4, 10/2018, Table 15. Recommended Operating
| Conditions, page 16, the VDDD should be set to 1.55V when the CPU is
| operating at 454MHz. This is the case in U-Boot, hence increase the
| VDDD voltage. This fixes instability when performing TFTP transfers.
| Increase the brownout threshold to 1.4V. The documentation recommends
| 1.45V setting for the brownout, however, this triggers failure during
| power block init, so keep the brownout slightly lower.
|
| Signed-off-by: Marek Vasut <marex@xxxxxxx>
| Cc: Stefano Babic <sbabic@xxxxxxx>
| Reviewed-by: Fabio Estevam <festevam@xxxxxxxxx>
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
arch/arm/mach-mxs/power-init.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/mach-mxs/power-init.c b/arch/arm/mach-mxs/power-init.c
index ca7c349d7f..c89f1f5f5d 100644
--- a/arch/arm/mach-mxs/power-init.c
+++ b/arch/arm/mach-mxs/power-init.c
@@ -1172,7 +1172,7 @@ static void mx23_ungate_power(void)
writel(MX23_POWER_CTRL_CLKGATE, &power_regs->hw_power_ctrl_clr);
}
-struct mxs_power_ctrl mxs_vddd_default = { .target = 1500, .brownout = 1325 };
+struct mxs_power_ctrl mxs_vddd_default = { .target = 1550, .brownout = 1400 };
struct mxs_power_ctrl mxs_vdda_default = { .target = 1800, .brownout = 1650 };
struct mxs_power_ctrl mxs_vddio_default = { .target = 3300, .brownout = 3150 };
struct mxs_power_ctrl mx23_vddmem_default = { .target = 2500, .brownout = 1700 };
--
2.26.2
_______________________________________________
barebox mailing list
barebox@xxxxxxxxxxxxxxxxxxx
http://lists.infradead.org/mailman/listinfo/barebox
