On Mon, May 9, 2016 at 11:02 PM, Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> wrote:
> On Fri, May 06, 2016 at 07:09:29AM -0700, Andrey Smirnov wrote:
>> Port TEMPMON driver from U-Boot
>>
>> Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
>> ---
>> arch/arm/dts/imx6qdl.dtsi | 14 +++
>> arch/arm/dts/imx6sx.dtsi | 14 +++
>> drivers/aiodev/Kconfig | 8 ++
>> drivers/aiodev/Makefile | 1 +
>> drivers/aiodev/imx_thermal.c | 239 +++++++++++++++++++++++++++++++++++++++++++
>> 5 files changed, 276 insertions(+)
>> create mode 100644 drivers/aiodev/imx_thermal.c
>>
>> diff --git a/arch/arm/dts/imx6qdl.dtsi b/arch/arm/dts/imx6qdl.dtsi
>> index 828be9c..0deafbc 100644
>> --- a/arch/arm/dts/imx6qdl.dtsi
>> +++ b/arch/arm/dts/imx6qdl.dtsi
>> @@ -8,3 +8,17 @@
>> ipu0 = &ipu1;
>> };
>> };
>> +
>> +&ocotp {
>> + #address-cells = <1>;
>> + #size-cells = <1>;
>> +
>> + analog1: ocotp_ana1@34 {
>
> @38?
>
>> + reg = <0x38 0x4>;
>> + };
>> +};
>> +
>> +&tempmon {
>> + nvmem-cells = <&analog1>;
>> + nvmem-cell-names = "ocotp-ana1";
>> +};
>
> Why not use the existing binding? The nvmem binding may be better, but I
> think we should not introduce new bindings without need.
I was using it originally (back when this was a part of HWMON RFC),
but then "cdev_do_open" was removed, so I switched to using "nvmem".
Granted there is not meaningful "open" or "close" operation for ocotp
cdev, but I just liked that approach less. I'll revert to original
code in v3
>
>> + node = of_parse_phandle(dev->device_node, "fsl,tempmon", 0);
>> + if (!node) {
>> + ret = -EINVAL;
>> + dev_err(dev, "Failed to parse fsl,tempmon\n");
>> + goto free_calibration_data;
>> + }
>> +
>> + anatop = of_find_device_by_node(node);
>> + if (!anatop) {
>> + ret = -EINVAL;
>> + dev_err(dev, "No device corresponds to fsl,tempmon\n");
>> + goto free_calibration_data;
>> + }
>
> syscon_base_lookup_by_phandle() instead of
> of_parse_phandle()/of_find_device_by_node()?
Will fix in v3
>
> Sascha
>
> --
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