Subject: Re: [PATCH V2 6/9] net/stmmac: Remove conditional compilation of clk code

From: Giuseppe CAVALLARO <[email-masked]>
Date: Tue, 24 Apr 2012 08:33:32 +0200

On 4/24/2012 8:16 AM, Giuseppe CAVALLARO wrote:
> On 4/24/2012 7:56 AM, Viresh KUMAR wrote:
>> With addition of dummy clk_*() calls for non CONFIG_HAVE_CLK cases in clk.h,
>> there is no need to have clk code enclosed in #ifdef CONFIG_HAVE_CLK, #endif
>> macros.
> 
> Hello Viresh
> 
> patch only applies fine against the net-next repository so on top of the
> diver version: March_2012 and it builds fine on arch w/ w/o HAVE_CLK
> (just tested).

Oops, sorry but on a build I got:

 CC      init/version.o
  LD      init/built-in.o
  LD      .tmp_vmlinux1
drivers/built-in.o: In function `stmmac_release':
/stlinux/cavagiu/git/mirror/net-next.git/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c:1134:
undefined reference to `clk_disable'
drivers/built-in.o: In function `stmmac_open':
/stlinux/cavagiu/git/mirror/net-next.git/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c:974:
undefined reference to `clk_enable'
/stlinux/cavagiu/git/mirror/net-next.git/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c:1079:
undefined reference to `clk_disable'
drivers/built-in.o: In function `stmmac_dvr_probe':
/stlinux/cavagiu/git/mirror/net-next.git/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c:1931:
undefined reference to `clk_get'
drivers/built-in.o: In function `stmmac_clk_csr_set':
/stlinux/cavagiu/git/mirror/net-next.git/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c:174:
undefined reference to `clk_get_rate'
drivers/built-in.o: In function `stmmac_suspend':
/stlinux/cavagiu/git/mirror/net-next.git/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c:2030:
undefined reference to `clk_disable'
drivers/built-in.o: In function `stmmac_resume':
/stlinux/cavagiu/git/mirror/net-next.git/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c:2054:
undefined reference to `clk_enable'
make: *** [.tmp_vmlinux1] Error 1

Pls, can you verify?

Peppe

> 
> Thanks a lot.
> 
> Acked-by: Giuseppe Cavallaro <[email-masked]>
> 
>> Signed-off-by: Viresh Kumar <[email-masked]>
>> Cc: Giuseppe Cavallaro <[email-masked]>
>> Cc: David S. Miller <[email-masked]>
>> ---
>>  drivers/net/ethernet/stmicro/stmmac/stmmac.h      |   41 ---------------------
>>  drivers/net/ethernet/stmicro/stmmac/stmmac_main.c |   31 ++++++++++------
>>  2 files changed, 19 insertions(+), 53 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
>> index db2de9a..7f85895 100644
>> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
>> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
>> @@ -81,9 +81,7 @@ struct stmmac_priv {
>>  	struct stmmac_counters mmc;
>>  	struct dma_features dma_cap;
>>  	int hw_cap_support;
>> -#ifdef CONFIG_HAVE_CLK
>>  	struct clk *stmmac_clk;
>> -#endif
>>  	int clk_csr;
>>  };
>>  
>> @@ -103,42 +101,3 @@ int stmmac_dvr_remove(struct net_device *ndev);
>>  struct stmmac_priv *stmmac_dvr_probe(struct device *device,
>>  				     struct plat_stmmacenet_data *plat_dat,
>>  				     void __iomem *addr);
>> -
>> -#ifdef CONFIG_HAVE_CLK
>> -static inline int stmmac_clk_enable(struct stmmac_priv *priv)
>> -{
>> -	if (!IS_ERR(priv->stmmac_clk))
>> -		return clk_enable(priv->stmmac_clk);
>> -
>> -	return 0;
>> -}
>> -
>> -static inline void stmmac_clk_disable(struct stmmac_priv *priv)
>> -{
>> -	if (IS_ERR(priv->stmmac_clk))
>> -		return;
>> -
>> -	clk_disable(priv->stmmac_clk);
>> -}
>> -static inline int stmmac_clk_get(struct stmmac_priv *priv)
>> -{
>> -	priv->stmmac_clk = clk_get(priv->device, NULL);
>> -
>> -	if (IS_ERR(priv->stmmac_clk))
>> -		return PTR_ERR(priv->stmmac_clk);
>> -
>> -	return 0;
>> -}
>> -#else
>> -static inline int stmmac_clk_enable(struct stmmac_priv *priv)
>> -{
>> -	return 0;
>> -}
>> -static inline void stmmac_clk_disable(struct stmmac_priv *priv)
>> -{
>> -}
>> -static inline int stmmac_clk_get(struct stmmac_priv *priv)
>> -{
>> -	return 0;
>> -}
>> -#endif /* CONFIG_HAVE_CLK */
>> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
>> index 1a4cf81..18ce287 100644
>> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
>> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
>> @@ -28,6 +28,7 @@
>>  	https://bugzilla.stlinux.com/
>>  *******************************************************************************/
>>  
>> +#include <linux/clk.h>
>>  #include <linux/kernel.h>
>>  #include <linux/interrupt.h>
>>  #include <linux/ip.h>
>> @@ -165,7 +166,6 @@ static void stmmac_verify_args(void)
>>  
>>  static void stmmac_clk_csr_set(struct stmmac_priv *priv)
>>  {
>> -#ifdef CONFIG_HAVE_CLK
>>  	u32 clk_rate;
>>  
>>  	if (IS_ERR(priv->stmmac_clk))
>> @@ -192,7 +192,6 @@ static void stmmac_clk_csr_set(struct stmmac_priv *priv)
>>  	   * we can not estimate the proper divider as it is not known
>>  	   * the frequency of clk_csr_i. So we do not change the default
>>  	   * divider. */
>> -#endif
>>  }
>>  
>>  #if defined(STMMAC_XMIT_DEBUG) || defined(STMMAC_RX_DEBUG)
>> @@ -971,7 +970,8 @@ static int stmmac_open(struct net_device *dev)
>>  	} else
>>  		priv->tm->enable = 1;
>>  #endif
>> -	stmmac_clk_enable(priv);
>> +	if (!IS_ERR(priv->stmmac_clk))
>> +		clk_enable(priv->stmmac_clk);
>>  
>>  	stmmac_check_ether_addr(priv);
>>  
>> @@ -1075,7 +1075,8 @@ open_error:
>>  	if (priv->phydev)
>>  		phy_disconnect(priv->phydev);
>>  
>> -	stmmac_clk_disable(priv);
>> +	if (!IS_ERR(priv->stmmac_clk))
>> +		clk_disable(priv->stmmac_clk);
>>  
>>  	return ret;
>>  }
>> @@ -1128,7 +1129,9 @@ static int stmmac_release(struct net_device *dev)
>>  #ifdef CONFIG_STMMAC_DEBUG_FS
>>  	stmmac_exit_fs();
>>  #endif
>> -	stmmac_clk_disable(priv);
>> +
>> +	if (!IS_ERR(priv->stmmac_clk))
>> +		clk_disable(priv->stmmac_clk);
>>  
>>  	return 0;
>>  }
>> @@ -1925,7 +1928,8 @@ struct stmmac_priv *stmmac_dvr_probe(struct device *device,
>>  		goto error;
>>  	}
>>  
>> -	if (stmmac_clk_get(priv))
>> +	priv->stmmac_clk = clk_get(priv->device, NULL);
>> +	if (IS_ERR(priv->stmmac_clk))
>>  		pr_warning("%s: warning: cannot get CSR clock\n", __func__);
>>  
>>  	/* If a specific clk_csr value is passed from the platform
>> @@ -1934,10 +1938,12 @@ struct stmmac_priv *stmmac_dvr_probe(struct device *device,
>>  	 * set the MDC clock dynamically according to the csr actual
>>  	 * clock input.
>>  	 */
>> -	if (!priv->plat->clk_csr)
>> -		stmmac_clk_csr_set(priv);
>> -	else
>> +	if (!priv->plat->clk_csr) {
>> +		if (!IS_ERR(priv->stmmac_clk))
>> +			stmmac_clk_csr_set(priv);
>> +	} else {
>>  		priv->clk_csr = priv->plat->clk_csr;
>> +	}
>>  
>>  	/* MDIO bus Registration */
>>  	ret = stmmac_mdio_register(ndev);
>> @@ -2020,7 +2026,8 @@ int stmmac_suspend(struct net_device *ndev)
>>  	else {
>>  		stmmac_set_mac(priv->ioaddr, false);
>>  		/* Disable clock in case of PWM is off */
>> -		stmmac_clk_disable(priv);
>> +		if (!IS_ERR(priv->stmmac_clk))
>> +			clk_disable(priv->stmmac_clk);
>>  	}
>>  	spin_unlock(&priv->lock);
>>  	return 0;
>> @@ -2042,9 +2049,9 @@ int stmmac_resume(struct net_device *ndev)
>>  	 * from another devices (e.g. serial console). */
>>  	if (device_may_wakeup(priv->device))
>>  		priv->hw->mac->pmt(priv->ioaddr, 0);
>> -	else
>> +	else if (!IS_ERR(priv->stmmac_clk))
>>  		/* enable the clk prevously disabled */
>> -		stmmac_clk_enable(priv);
>> +			clk_enable(priv->stmmac_clk);
>>  
>>  	netif_device_attach(ndev);
>>  
> 
> --
> To unsubscribe from this list: send the line "unsubscribe netdev" in
> the body of a message to [email-masked]
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>