Re: [PATCH v2 1/4] dt: bindings: add bindings for Broadcom bcm43xx sdio devices

On 17-06-14 08:32, Hans de Goede wrote:

Hi,

On 06/16/2014 10:53 PM, Florian Fainelli wrote:

quoted

2014-06-16 10:56 GMT-07:00 Hans de Goede [off-list ref]:

quoted

From: Arend van Spriel <arend-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>

The Broadcom bcm43xx sdio devices are fullmac devices that may be
integrated in ARM platforms. Currently, the brcmfmac driver for
these devices support use of platform data. This patch specifies
the bindings that allow this platform data to be expressed in the
devicetree.

Reviewed-by: Hante Meuleman <meuleman-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
Reviewed-by: Franky (Zhenhui) Lin <frankyl-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
Reviewed-by: Daniel (Deognyoun) Kim <dekim-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
Reviewed-by: Pieter-Paul Giesberts <pieterpg-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
Signed-off-by: Arend van Spriel <arend-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
[hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org: drop clk / reg_on gpio handling, as there is no consensus
  on how to handle this yet]
[hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org: move from bindings/staging to bindings]
Signed-off-by: Hans de Goede <redacted>
---
  .../bindings/net/wireless/brcm,bcm43xx-fmac.txt    | 29 ++++++++++++++++++++++
  1 file changed, 29 insertions(+)
  create mode 100644 Documentation/devicetree/bindings/net/wireless/brcm,bcm43xx-fmac.txt

diff --git a/Documentation/devicetree/bindings/net/wireless/brcm,bcm43xx-fmac.txt b/Documentation/devicetree/bindings/net/wireless/brcm,bcm43xx-fmac.txt
new file mode 100644
index 0000000..6a0aaf2
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/wireless/brcm,bcm43xx-fmac.txt

@@ -0,0 +1,29 @@
+Broadcom BCM43xx Fullmac wireless SDIO devices
+
+This node provides properties for controlling the Broadcom wireless device. The
+node is expected to be specified as a child node to the SDIO controller that
+connects the device to the system.
+
+Required properties:
+
+ - compatible : Should be "brcm,bcm43xx-fmac".

In general, the use of a wildcard compatible string is discouraged
over the use of a more descriptive compatible string. So you should
find out what is the first chip that is compatible, and use that
compatible string as long as that compatibility remains.

Right, Arend, what should we use then ?

In earlier discussions, we ended up with this compatible string. The 
properties are generic enough to be covered by this 'wildcard' string. 
However, I am not religious about it so if you feel strongly for an 
explicit string it could be brcm,bcm4329-fmac, but it does not have my 
preference.

quoted

quoted

+
+Optional properties:
+ - brcm,drive-strength : drive strength used for SDIO pins on device.
+       (default = 6mA).

It would not hurt if you did specify the unit of the
"brcm,drive-strength" property here. Also, if the default is 6, maybe
the example below should be fixed to reflect that so people do not
think that writing 4 to a register = 6 mA.

Ok will fix in the next version.

I agree that explicitly specifying the unit of the property is a good 
addition. If that is done I don't think it is necessary to change the 
value used in the example.

Regards,
Arend

quoted

quoted

+ - interrupt-parent : the phandle for the interrupt controller to which the
+       device interrupts are connected.
+ - interrupts : specifies attributes for the out-of-band interrupt (host-wake).
+       When not specified the device will use in-band SDIO interrupts.
+ - interrupt-names : name of the out-of-band interrupt, which must be set
+       to "host-wake".
+
+Example:
+
+bcm4335 {
+       compatible = "brcm,bcm43xx-fmac";
+       brcm,drive-strength = <4>;
+       interrupt-parent = <&gpx2>;
+       interrupts = <5 IRQ_TYPE_LEVEL_HIGH>;
+       interrupt-names = "host-wake";
+};
--
2.0.0


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