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Date: Thu, 21 Apr 2016 09:36:12 -0500
From: Rob Herring <robh@...nel.org>
To: Amitkumar Karwar <akarwar@...vell.com>
Cc: linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org, Wei-Ning Huang <wnhuang@...omium.org>,
Xinming Hu <huxm@...vell.com>
Subject: Re: [PATCH v7 1/2] dt: bindings: add MARVELL's bt-sd8xxx wireless
device
On Mon, Apr 18, 2016 at 05:23:49AM -0700, Amitkumar Karwar wrote:
> From: Xinming Hu <huxm@...vell.com>
>
> Add device tree binding documentation for MARVELL's bluetooth sdio
> (sd8897 and sd8997) chip.
>
> Signed-off-by: Xinming Hu <huxm@...vell.com>
> Signed-off-by: Amitkumar Karwar <akarwar@...vell.com>
> ---
> Listing changelist for both 1/2 and 2/2 here
> v2: Fixed build error reported by kbuild test robot
> drivers/bluetooth/btmrvl_platform.c:141:22: error:
> 'btmrvl_plt_pm_ops' undeclared here (not in a function)
>
> v3: Add NULL check for 'btmrvl_plt_dev'
>
> v4: Moved the bindings file to bindings/net/
> Corrected the name of 'name' and 'compatible' properties(Rob Herring)
>
> v5: Comments for wlan patches were applicable here as well. Like all binding
> changes in single file, specifying node as a child of SDIO controller.
>
> v6: a)Use <chip>-bt order for compatible attribute(Rob Herring)
> b)Split wakeuppin-gap to wakeup-pin and wakeup-gap(Rob Herring)
> c)Use sdio function number for both the unit address and reg(Rob Herring)
>
> v7: a)Use suggested vendor name and generic node name(Rob Herring)
> ---
> Documentation/devicetree/bindings/btmrvl.txt | 29 -----------
> .../devicetree/bindings/net/marvell-bt-sd8xxx.txt | 57 ++++++++++++++++++++++
> 2 files changed, 57 insertions(+), 29 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/btmrvl.txt
> create mode 100644 Documentation/devicetree/bindings/net/marvell-bt-sd8xxx.txt
>
> diff --git a/Documentation/devicetree/bindings/btmrvl.txt b/Documentation/devicetree/bindings/btmrvl.txt
> deleted file mode 100644
> index 58f964b..0000000
> --- a/Documentation/devicetree/bindings/btmrvl.txt
> +++ /dev/null
> @@ -1,29 +0,0 @@
> -btmrvl
> -------
> -
> -Required properties:
> -
> - - compatible : must be "btmrvl,cfgdata"
> -
> -Optional properties:
> -
> - - btmrvl,cal-data : Calibration data downloaded to the device during
> - initialization. This is an array of 28 values(u8).
> -
> - - btmrvl,gpio-gap : gpio and gap (in msecs) combination to be
> - configured.
> -
> -Example:
> -
> -GPIO pin 13 is configured as a wakeup source and GAP is set to 100 msecs
> -in below example.
> -
> -btmrvl {
> - compatible = "btmrvl,cfgdata";
> -
> - btmrvl,cal-data = /bits/ 8 <
> - 0x37 0x01 0x1c 0x00 0xff 0xff 0xff 0xff 0x01 0x7f 0x04 0x02
> - 0x00 0x00 0xba 0xce 0xc0 0xc6 0x2d 0x00 0x00 0x00 0x00 0x00
> - 0x00 0x00 0xf0 0x00>;
> - btmrvl,gpio-gap = <0x0d64>;
> -};
> diff --git a/Documentation/devicetree/bindings/net/marvell-bt-sd8xxx.txt b/Documentation/devicetree/bindings/net/marvell-bt-sd8xxx.txt
> new file mode 100644
> index 0000000..17f8470
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/marvell-bt-sd8xxx.txt
> @@ -0,0 +1,57 @@
> +Marvell 8897/8997 (sd8897/sd8997) bluetooth SDIO devices
> +------
> +
> +Required properties:
> +
> + - compatible : should be one of the following:
> + * "marvell,sd8897-bt"
> + * "marvell,sd8997-bt"
> +
> +Optional properties:
> +
> + - marvell,cal-data : Calibration data downloaded to the device during
> + initialization. This is an array of 28 values(u8).
> +
> + - btmrvl,wakeup-pin : 'wakeup-pin' represents wakeup pin number of the bluetooth
> + chip. firmware will use the pin to wakeup host system.
> + - btmrvl,wakeup-gap-msec : wakeup gap represents wakeup latency of the host platform.
> + The value will be configured to firmware. This is needed to work
> + chip's sleep feature as expected.
These should be marvell, not btmrvl.
Also, -ms is the standard unit rather than -msec as defined in
Documentation/devicetree/bindings/property-units.txt.
> + - interrupt-parent: phandle of the parent interrupt controller
> + - interrupts : interrupt pin number to the cpu. Driver will request an irq based on
> + this interrupt number. During system suspend, the irq will be enabled
> + so that the bluetooth chip can wakeup host platform under certain
> + condition. During system resume, the irq will be disabled to make sure
> + unnecessary interrupt is not received.
> +
> +Example:
> +
> +IRQ pin 119 is used as system wakeup source interrupt.
> +wakeup pin 13 and gap 100ms are configured so that firmware can wakeup host
> +using this device side pin and wakeup latency.
> +calibration data is also available in below example.
> +
> +&mmc3 {
> + status = "okay";
> + vmmc-supply = <&wlan_en_reg>;
> + bus-width = <4>;
> + cap-power-off-card;
> + keep-power-in-suspend;
> +
> + #address-cells = <1>;
> + #size-cells = <0>;
> + btmrvl: bluetooth@2 {
> + compatible = "marvell,sd8897-bt";
> + reg = <2>;
> + interrupt-parent = <&pio>;
> + interrupts = <119 IRQ_TYPE_LEVEL_LOW>;
> +
> + btmrvl,cal-data = /bits/ 8 <
> + 0x37 0x01 0x1c 0x00 0xff 0xff 0xff 0xff 0x01 0x7f 0x04 0x02
> + 0x00 0x00 0xba 0xce 0xc0 0xc6 0x2d 0x00 0x00 0x00 0x00 0x00
> + 0x00 0x00 0xf0 0x00>;
> + btmrvl,wakeup-pin = <0x0d>;
> + btmrvl,wakeup-gap-msec = <0x64>;
These are wrong too.
> + };
> +};
> +
> --
> 1.8.1.4
>
> --
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