[PATCH 2/3] ARM: dts: imx53-qsb: Make DA9053 regulator functional

Fabio Estevam festevam at gmail.com
Wed Sep 26 20:12:52 EDT 2012

Hi Marek,

On Wed, Sep 26, 2012 at 9:00 PM, Marek Vasut <marex at denx.de> wrote:
> Dear Fabio Estevam,
> [...]
>> +                                     interrupt-parent = <&gpio7>;
>> +                                     interrupts = <11 0x8>; /* low-level
> active IRQ at GPIO7_11 */
> You mean active-low ? :-)

Actually I meant 'active low level-sensitive':

>From Documentation/devicetree/bindings/gpio/fsl-imx-gpio.txt:

 The second cell bits[3:0] is used to specify trigger type and level flags:
      1 = low-to-high edge triggered.
      2 = high-to-low edge triggered.
      4 = active high level-sensitive.
      8 = active low level-sensitive

> What was the conclusion on over-using regulator-always-on ?

I will be glad to get some suggestions about this.

With the original code the regulators were getting disabled, which
caused some key power supplies to be removed and then system died.

Looking at the mx53qsb/DA9053 board schematics I cannot see any of
these supplies that can be turned-off, and that's why I kept the
'always-on' flag.


Fabio Estevam

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