On 08/20/2013 07:14 AM, Laxman Dewangan wrote:
> Palmas rails like LDOs, SMPSs, REGENs, SYSENs can be enable and disable
> by register programming through I2C communication as well as it can be
> enable/disable with the external control input ENABLE1, ENABLE2 and NSLEEP.
>
> Add support for configuring these rails to be controlled by external control
> inputs. This is require to configure the rail's control register as well as
> configuration of resource register.
>
> Provide the external input names through parameter "roof-floor". Updated the
> DT binding document to details different value of the roof-floor.
> diff --git a/Documentation/devicetree/bindings/regulator/palmas-pmic.txt b/Documentation/devicetree/bindings/regulator/palmas-pmic.txt
The binding changes look reasonable and backwards-compatible, so they're
good. Just one nit:
(In the example, I assume:)
> regulator-always-on;
> regulator-boot-on;
> ti,warm-reset;
> - ti,roof-floor;
> + ti,roof-floor = 0x1; /* ENABLE1 control */
You need <> around the value, so better:
ti,roof-floor = <0x1>; /* ENABLE1 control */
or better:
ti,roof-floor = <1>; /* ENABLE1 control */
(even better might be a header file that defines names for those
constants...)
> diff --git a/drivers/regulator/palmas-regulator.c b/drivers/regulator/palmas-regulator.c
> @@ -746,9 +854,24 @@ static void palmas_dt_to_pdata(struct device *dev,
> of_property_read_bool(palmas_matches[idx].of_node,
> "ti,warm-reset");
>
> - pdata->reg_init[idx]->roof_floor =
> - of_property_read_bool(palmas_matches[idx].of_node,
> - "ti,roof-floor");
> + ret = of_property_read_u32(palmas_matches[idx].of_node,
> + "ti,roof-floor", &prop);
> + /* EINVAL: Property not found */
> + if (ret != -EINVAL) {
> + int econtrol;
> +
> + /* use default value, when no value is specified */
> + econtrol = PALMAS_EXT_CONTROL_NSLEEP;
> + if (!ret) {
> + if (prop == 1)
> + econtrol = PALMAS_EXT_CONTROL_ENABLE1;
> + else if (prop == 2)
> + econtrol = PALMAS_EXT_CONTROL_ENABLE2;
> + else if (prop == 3)
> + econtrol = PALMAS_EXT_CONTROL_NSLEEP;
Should probably at least WARN() here if the value is invalid?
> + }
> + pdata->reg_init[idx]->roof_floor = econtrol;
> + }
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