On Tue, Jan 12, 2010 at 6:52 PM, Premi, Sanjeev premi@ti.com wrote:
-----Original Message----- From: u-boot-bounces@lists.denx.de [mailto:u-boot-bounces@lists.denx.de] On Behalf Of Syed Mohammed, Khasim Sent: Tuesday, January 12, 2010 11:35 AM To: beagleboard@googlegroups.com Cc: u-boot@lists.denx.de Subject: Re: [U-Boot] [beagleboard] RE: TI:OMAP: [PATCH] Add 720Mhz support for Beagle Rev C4
On Mon, Jan 11, 2010 at 10:52 PM, Premi, Sanjeev premi@ti.com wrote:
-----Original Message----- From: u-boot-bounces@lists.denx.de [mailto:u-boot-bounces@lists.denx.de] On Behalf Of Khasim Syed Mohammed Sent: Saturday, January 09, 2010 10:17 AM To: u-boot@lists.denx.de; beagleboard@googlegroups.com Subject: [U-Boot] TI:OMAP: [PATCH] Add 720Mhz support for Beagle Rev C4
From e28c5e917f9504b724b6587287ad9e1eb0682b11 Mon Sep 17
00:00:00 2001
From: Syed Mohammed Khasim khasim@ti.com Date: Sat, 9 Jan 2010 09:40:32 +0530 Subject: [PATCH] Add 720Mhz support for Beagle Rev C4
Use the Generic TWL and Clock APIs to get beagle Rev C4 running at 720Mhz
Signed-off-by: Syed Mohammed Khasim khasim@ti.com
board/ti/beagle/beagle.c | 20 ++++++++++++++++++-- 1 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/board/ti/beagle/beagle.c b/board/ti/beagle/beagle.c index 0def5a6..7985ee9 100644 --- a/board/ti/beagle/beagle.c +++ b/board/ti/beagle/beagle.c @@ -122,9 +122,27 @@ int misc_init_r(void) struct gpio *gpio5_base = (struct gpio *)OMAP34XX_GPIO5_BASE; struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE;
- beagle_identify();
twl4030_power_init(); twl4030_led_init();
- if (beagle_revision == REVISION_C4) {
- /* Select TWL4030 VSEL to support 720Mhz */
twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
- VAUX2_VSEL_18,
TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
- DEV_GRP_P1);
twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VDD1_VSEL,
- VDD1_VSEL_14,
TWL4030_PM_RECEIVER_VDD1_DEV_GRP,
- DEV_GRP_P1);
- prcm_config_720mhz();
- }
/* Configure GPIOs to output */ writel(~(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1), &gpio6_base->oe); writel(~(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22
| GPIO21 |
@@ -136,8 +154,6 @@ int misc_init_r(void) writel(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 | GPIO15 | GPIO14 | GPIO13 | GPIO12, &gpio5_base->setdataout);
- beagle_identify();
dieid_num_r();
Khasim,
I am not clear about the beagle revisions, but I feel it
will be better to
check the silicon capability for 720MHz to do the scaling.
This patch will
need to be updated if there is C5 which also supports 720MHz.
I was looking for documentation / addendum that points to change in silicon revisions - unfortunately I didn't find any.
I agree that we can base this on Silicon Rev instead of board rev. Will change this when I get the documentation for the same.
Khasim,
The steps are defined in the latest TRM.
Thanks for pointing that out. After checking out with Gerald, I prefer staying with Board revision for this Rev.
I am also waiting for cpu revision detection discussion to stabilize a bit.
Regards, Khasim
Thanks for the review.
Regards, Khasim
return 0;
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