netdev - Re: ath9k gpio request

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Message-ID: <574ED297.4080004@gmail.com>
Date:	Wed, 01 Jun 2016 17:48:31 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	"Pan, Miaoqing" <miaoqing@....qualcomm.com>,
	Kalle Valo <kvalo@...eaurora.org>
CC:	Stephen Rothwell <sfr@...b.auug.org.au>,
	ath9k-devel <ath9k-devel@...lcomm.com>,
	"linux-next@...r.kernel.org" <linux-next@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	"ath9k-devel@...ts.ath9k.org" <ath9k-devel@...ts.ath9k.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Miaoqing Pan <miaoqing@...eaurora.org>
Subject: Re: ath9k gpio request

On Wednesday 01 June 2016 04:42 PM, Sudip Mukherjee wrote:
> On Wednesday 01 June 2016 12:24 PM, Pan, Miaoqing wrote:
>> which chip ?  And what's the GPIO number ?
>
> lspci -v reports:
> 09:00.0 Network controller: Qualcomm Atheros AR9462 Wireless Network
> Adapter (rev 01)
>      Subsystem: Foxconn International, Inc. Device e052
>      Flags: bus master, fast devsel, latency 0, IRQ 19
>      Memory at c0500000 (64-bit, non-prefetchable) [size=512K]
>      Expansion ROM at c0580000 [disabled] [size=64K]
>      Capabilities: [40] Power Management version 2
>      Capabilities: [50] MSI: Enable- Count=1/4 Maskable+ 64bit+
>      Capabilities: [70] Express Endpoint, MSI 00
>      Capabilities: [100] Advanced Error Reporting
>      Capabilities: [140] Virtual Channel
>      Capabilities: [160] Device Serial Number 00-00-00-00-00-00-00-00
>      Kernel driver in use: ath9k
>
> Any easy way to find out the gpio number or i can modify the module to
> find that out.

Its trying for GPIO 11 with label ath9k-rfkill.

The attached dmesg is with some modification as below.

diff --git a/drivers/net/wireless/ath/ath9k/hw.c 
b/drivers/net/wireless/ath/ath9k/hw.c
index 8b2895f9..23deea7 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -2729,14 +2729,16 @@ static void ath9k_hw_gpio_cfg_wmac(struct ath_hw 
*ah, u32 gpio, bool out,
  static void ath9k_hw_gpio_request(struct ath_hw *ah, u32 gpio, bool out,
                                   const char *label, u32 ah_signal_type)
  {
-       WARN_ON(gpio >= ah->caps.num_gpio_pins);
+//     WARN_ON(gpio >= ah->caps.num_gpio_pins);
+
+       pr_err("sudip: %d %s\n", gpio, label);

         if (BIT(gpio) & ah->caps.gpio_mask)
                 ath9k_hw_gpio_cfg_wmac(ah, gpio, out, ah_signal_type);
         else if (AR_SREV_SOC(ah))
                 ath9k_hw_gpio_cfg_soc(ah, gpio, out, label);
-       else
-               WARN_ON(1);
+//     else
+//             WARN_ON(1);
  }

Regards
Sudip

View attachment "dm1.txt" of type "text/plain" (178473 bytes)