Hi Alagu,
On 2017-10-02 09:02, Alagu Sankar wrote:
Hi Steve,
On 2017-10-02 04:17, Steve deRosier wrote:
Hi Alagu,
On Sat, Sep 30, 2017 at 10:37 AM, <silexcommon@xxxxxxxxx> wrote:
From: Alagu Sankar <alagusankar@xxxxxxxxxxxxxxx>
The QCA9377-3 WB396 sdio reference card does not get initialized
due to the conflict in uart gpio pins. This fix is not required
for other QCA9377 sdio cards.
Signed-off-by: Alagu Sankar <alagusankar@xxxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath10k/core.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index b4f66cd..86247c8 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -1708,8 +1708,15 @@ static int ath10k_init_uart(struct ath10k *ar)
return ret;
}
- if (!uart_print)
+ if (!uart_print) {
+ /* Hack: override dbg TX pin to avoid side effects of default
+ * GPIO_6 in QCA9377 WB396 reference card
+ */
+ if (ar->hif.bus == ATH10K_BUS_SDIO)
+ ath10k_bmi_write32(ar, hi_dbg_uart_txpin,
+ ar->hw_params.uart_pin);
If it is indeed a "hack", then I don't think the maintainer should
accept this upstream. If you want it upstream you need a clean enough
implementation that doesn't need to be labeled a "hack".
It is a hack as per the qcacld reference driver.
Your commit message states that this is only needed for a very
specific card and not for other QCA9377 sdio cards. Yet, you're doing
this for all ATH10K_BUS_SDIO devices. Not good. I think that it's a
quirk and it's limited to a particular implementation of the device.
My suggestion: if it can be automatically determined, then do so
explicitly. If not, then it needs to be a DT setting or a module
parameter or something like that so the platform maker can decide to
do it. Having it affect all users of a SDIO QCA9377 when it doesn't
apply doesn't seem like a good idea to me.
- Steve
Got it. The qcacld reference driver had it for all the QCA9377 sdio cards.
But we found it to be a problem only for the WB396 reference card. Will
have this checked again and release a v2 patch accordingly.
While you are at it, you might as well change the commit comments to:
"ath10k: sdio: <description>"
or perhaps just:
"ath10k: <description>"
Best Regards,
Alagu Sankar
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