From: Hans de Goede <hdegoede@redhat.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 4/7] sunxi: power: Change A23/A33 VDD-SYS default from 1.2V to 1.1V
Date: Sun, 11 Oct 2015 13:17:52 +0200 [thread overview]
Message-ID: <561A4560.2000709@redhat.com> (raw)
In-Reply-To: <CAGb2v66vLmdCsXE=f5r_aHxADq8vpdX6J6o6no-kjJFDRa9g_Q@mail.gmail.com>
Hi,
On 10-10-15 16:13, Chen-Yu Tsai wrote:
> On Sat, Oct 3, 2015 at 10:26 PM, Hans de Goede <hdegoede@redhat.com> wrote:
>> Change the axp223 dcdc2 / VDD-SYS default from 1.2V to 1.1V, 1.1V is the
>> value recommended by Allwinner and is what most fex files specify.
>>
>> This has been tested on a number of A23/A33 tablets including on an
>> A23 Ippo-q8h-v1.2 PCB tablet which has a fex file which specifies 1.2V
>> (which is where our original 1.2V default comes from).
>>
>> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
>
> We should also be able to drop the VDD-SYS voltage for A31/A31s, which is
> from DCDC4, as well.
The fex files do not agree with you all A31 fex files have it at either
1200 or 1240 mV.
> Furthermore, DCDC2 on AXP221/sun6i is normally powering the GPU,
> in spite of the reference design using it for the CPU.
Right, the Kconfig help for DCDC2 already contains:
On A31 boards dcdc2 is used for VDD-GPU and should be 1.2V.
Regards,
Hans
next prev parent reply other threads:[~2015-10-11 11:17 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-03 14:26 [U-Boot] [PATCH 1/7] sunxi: Kconfig-ify CONFIG_AXP152_POWER and _AXP209_POWER Hans de Goede
2015-10-03 14:26 ` [U-Boot] [PATCH 2/7] sunxi: power: Make all voltages configurable through Kconfig Hans de Goede
2015-10-09 6:56 ` Ian Campbell
2015-10-03 14:26 ` [U-Boot] [PATCH 3/7] sunxi: power: Unify axp pmic function names Hans de Goede
2015-10-03 14:32 ` Chen-Yu Tsai
2015-10-03 20:16 ` Hans de Goede
2015-10-09 8:31 ` Ian Campbell
2015-10-09 11:24 ` Hans de Goede
2015-10-09 12:41 ` Ian Campbell
2015-10-09 13:44 ` Hans de Goede
2015-10-09 14:24 ` Ian Campbell
2015-10-09 14:49 ` Chen-Yu Tsai
2015-10-11 11:14 ` Ian Campbell
2015-10-03 14:26 ` [U-Boot] [PATCH 4/7] sunxi: power: Change A23/A33 VDD-SYS default from 1.2V to 1.1V Hans de Goede
2015-10-09 8:33 ` Ian Campbell
2015-10-10 14:13 ` Chen-Yu Tsai
2015-10-11 11:17 ` Hans de Goede [this message]
2015-10-03 14:26 ` [U-Boot] [PATCH 5/7] sunxi: power: Change A23/A33 aldo1 default voltage to 3.0V Hans de Goede
2015-10-09 8:34 ` Ian Campbell
2015-10-03 14:26 ` [U-Boot] [PATCH 6/7] sunxi: power: Use pmic_bus functions for axp152 / axp209 driver Hans de Goede
2015-10-09 8:36 ` Ian Campbell
2015-10-03 14:26 ` [U-Boot] [PATCH 7/7] sunxi: power: Drop protection against multiple calls from axp221 axp_init() Hans de Goede
2015-10-09 8:36 ` Ian Campbell
2015-10-09 6:49 ` [U-Boot] [PATCH 1/7] sunxi: Kconfig-ify CONFIG_AXP152_POWER and _AXP209_POWER Ian Campbell
2015-10-09 11:20 ` Hans de Goede
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