[U-Boot] [PATCH v2] OMAP3 Beagle Pin Mux initialization glitch fix
Joel A Fernandes
agnel.joel at gmail.com
Thu Aug 11 07:27:58 CEST 2011
From: Bob Feretich <bob.feretich at rafresearch.com>
The below patch reverses the order of two segments in the board file.
Output pins need to have their values initialized, before they are
exposed to the logic outside the chip.
Previous discussions:
http://lists.denx.de/pipermail/u-boot/2011-March/088115.html
Signed-off-by: Bob Feretich <bob.feretich at rafresearch.com>
Signed-off-by: Joel A Fernandes <agnel.joel at gmail.com>
---
Resending patch. git-send-email inserted another "From", sorry about that.
board/ti/beagle/beagle.c | 12 ++++++------
1 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/board/ti/beagle/beagle.c b/board/ti/beagle/beagle.c
index ab50514..15d061a 100644
--- a/board/ti/beagle/beagle.c
+++ b/board/ti/beagle/beagle.c
@@ -301,17 +301,17 @@ int misc_init_r(void)
twl4030_power_init();
twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON);
- /* Configure GPIOs to output */
- writel(~(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1), &gpio6_base->oe);
- writel(~(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
- GPIO15 | GPIO14 | GPIO13 | GPIO12), &gpio5_base->oe);
-
- /* Set GPIOs */
+ /* Set GPIO states before they are made outputs */
writel(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1,
&gpio6_base->setdataout);
writel(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
GPIO15 | GPIO14 | GPIO13 | GPIO12, &gpio5_base->setdataout);
+ /* Configure GPIOs to output */
+ writel(~(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1), &gpio6_base->oe);
+ writel(~(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
+ GPIO15 | GPIO14 | GPIO13 | GPIO12), &gpio5_base->oe);
+
dieid_num_r();
return 0;
--
1.7.1
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