Hi,
On Thu, Sep 29, 2016 at 10:09:43PM +0530, Amitkumar Karwar wrote:
> From: Xinming Hu <huxm@xxxxxxxxxxx>
>
> This patch derives device tree node from pcie bus layer framework.
> Device tree bindings file has been renamed(marvell-sd8xxx.txt ->
> marvell-8xxx.txt) to accomodate PCIe changes.
>
> Signed-off-by: Xinming Hu <huxm@xxxxxxxxxxx>
> Signed-off-by: Amitkumar Karwar <akarwar@xxxxxxxxxxx>
> ---
> v2: Included vendor and product IDs in compatible strings for PCIe
> chipsets(Rob Herring)
> v3: Patch is created using -M option so that it will only include diff of
> original and renamed files(Rob Herring)
> Resend v3: Resending the patch because I missed to include device tree mailing
> while sending v3.
> ---
Why is this patch so different than the SDIO DT handling for the same
driver?
> .../{marvell-sd8xxx.txt => marvell-8xxx.txt} | 8 +++++---
> drivers/net/wireless/marvell/mwifiex/pcie.c | 20 ++++++++++++++++++++
> drivers/net/wireless/marvell/mwifiex/sta_cmd.c | 3 ++-
> 3 files changed, 27 insertions(+), 4 deletions(-)
> rename Documentation/devicetree/bindings/net/wireless/{marvell-sd8xxx.txt => marvell-8xxx.txt} (91%)
>
> diff --git a/Documentation/devicetree/bindings/net/wireless/marvell-sd8xxx.txt b/Documentation/devicetree/bindings/net/wireless/marvell-8xxx.txt
> similarity index 91%
> rename from Documentation/devicetree/bindings/net/wireless/marvell-sd8xxx.txt
> rename to Documentation/devicetree/bindings/net/wireless/marvell-8xxx.txt
> index c421aba..dfe5f8e 100644
> --- a/Documentation/devicetree/bindings/net/wireless/marvell-sd8xxx.txt
> +++ b/Documentation/devicetree/bindings/net/wireless/marvell-8xxx.txt
> @@ -1,8 +1,8 @@
> -Marvell 8897/8997 (sd8897/sd8997) SDIO devices
> +Marvell 8897/8997 (sd8897/sd8997/pcie8997) SDIO/PCIE devices
> ------
>
> -This node provides properties for controlling the marvell sdio wireless device.
> -The node is expected to be specified as a child node to the SDIO controller that
> +This node provides properties for controlling the marvell sdio/pcie wireless device.
> +The node is expected to be specified as a child node to the SDIO/PCIE controller that
> connects the device to the system.
>
> Required properties:
> @@ -10,6 +10,8 @@ Required properties:
> - compatible : should be one of the following:
> * "marvell,sd8897"
> * "marvell,sd8997"
> + * "pci11ab,2b42"
> + * "pci1b4b,2b42"
>
> Optional properties:
>
> diff --git a/drivers/net/wireless/marvell/mwifiex/pcie.c b/drivers/net/wireless/marvell/mwifiex/pcie.c
> index 063c707..f1eeb73 100644
> --- a/drivers/net/wireless/marvell/mwifiex/pcie.c
> +++ b/drivers/net/wireless/marvell/mwifiex/pcie.c
> @@ -37,6 +37,23 @@ static struct mwifiex_if_ops pcie_ops;
>
> static struct semaphore add_remove_card_sem;
>
> +static const struct of_device_id mwifiex_pcie_of_match_table[] = {
> + { .compatible = "pci11ab,2b42" },
> + { .compatible = "pci1b4b,2b42" },
> + { }
> +};
> +
> +static int mwifiex_pcie_probe_of(struct device *dev)
> +{
> + if (!dev->of_node ||
In sdio.c, this check is done silently; that way, we don't error out
(and print an error string) just because there's no DT node. And I think
that makes sense.
Maybe pull this condition out separately and return 0?
> + !of_match_node(mwifiex_pcie_of_match_table, dev->of_node)) {
> + pr_err("pcie device node not available");
> + return -1;
> + }
> +
Just an FYI, the equivalent sdio.c code (mwifiex_sdio_probe_of()) also
parses a platform-specific wakeup pin. Rajat and I were considering
moving that to mwifiex_register(), so we can get the same handling in
pcie.c. But I think it's probably sane to leave the compatible table
here in the interface driver for now.
> + return 0;
> +}
> +
> static int
> mwifiex_map_pci_memory(struct mwifiex_adapter *adapter, struct sk_buff *skb,
> size_t size, int flags)
> @@ -206,6 +223,9 @@ static int mwifiex_pcie_probe(struct pci_dev *pdev,
> card->pcie.can_ext_scan = data->can_ext_scan;
> }
>
> + /* device tree node parsing and platform specific configuration*/
> + mwifiex_pcie_probe_of(&pdev->dev);
You aren't catching the error code here. Probably because you're wrongly
returning an error above for the !of_node case.
Brian
> +
> if (mwifiex_add_card(card, &add_remove_card_sem, &pcie_ops,
> MWIFIEX_PCIE)) {
> pr_err("%s failed\n", __func__);
> diff --git a/drivers/net/wireless/marvell/mwifiex/sta_cmd.c b/drivers/net/wireless/marvell/mwifiex/sta_cmd.c
> index 638d30a..f2a7a13 100644
> --- a/drivers/net/wireless/marvell/mwifiex/sta_cmd.c
> +++ b/drivers/net/wireless/marvell/mwifiex/sta_cmd.c
> @@ -2218,7 +2218,8 @@ int mwifiex_sta_init_cmd(struct mwifiex_private *priv, u8 first_sta, bool init)
> * The cal-data can be read from device tree and/or
> * a configuration file and downloaded to firmware.
> */
> - if (priv->adapter->iface_type == MWIFIEX_SDIO &&
> + if ((priv->adapter->iface_type == MWIFIEX_SDIO ||
> + priv->adapter->iface_type == MWIFIEX_PCIE) &&
> adapter->dev->of_node) {
> adapter->dt_node = adapter->dev->of_node;
> if (of_property_read_u32(adapter->dt_node,
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