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stmmac: do not fail when probe and there is no csr clk defined 

On some platforms, for example where we are doing the bring-up,
the csr clock is not passed from the framework and the Ethernet
device driver is failing when it can work w/o any issues and
using the default values. So this patch just warnings the case
of the csr clock cannot be acquired but w/o failing the probe
step. I have just tested it on ST STiH415 SoC (ARM).

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Giuseppe CAVALLARO 2012-04-18 19:48:22 +00:00 committed by David S. Miller
parent 0f1f88a875
commit 31ea38eefe
2 changed files with 11 additions and 7 deletions
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13
drivers/net/ethernet/stmicro/stmmac/stmmac.h
View File

@ -107,7 +107,7 @@ struct stmmac_priv *stmmac_dvr_probe(struct device *device,
#ifdef CONFIG_HAVE_CLK
static inline int stmmac_clk_enable(struct stmmac_priv *priv)
{
if (priv->stmmac_clk)
if (!IS_ERR(priv->stmmac_clk))
return clk_enable(priv->stmmac_clk);
return 0;
@ -115,17 +115,18 @@ static inline int stmmac_clk_enable(struct stmmac_priv *priv)
static inline void stmmac_clk_disable(struct stmmac_priv *priv)
{
if (priv->stmmac_clk)
clk_disable(priv->stmmac_clk);
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)) {
pr_err("%s: ERROR clk_get failed\n", __func__);
if (IS_ERR(priv->stmmac_clk))
return PTR_ERR(priv->stmmac_clk);
}
return 0;
}
#else

5
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
View File

@ -168,6 +168,9 @@ static void stmmac_clk_csr_set(struct stmmac_priv *priv)
#ifdef CONFIG_HAVE_CLK
u32 clk_rate;
if (IS_ERR(priv->stmmac_clk))
return;
clk_rate = clk_get_rate(priv->stmmac_clk);
/* Platform provided default clk_csr would be assumed valid
@ -1923,7 +1926,7 @@ struct stmmac_priv *stmmac_dvr_probe(struct device *device,
}
if (stmmac_clk_get(priv))
goto error;
pr_warning("%s: warning: cannot get CSR clock\n", __func__);
/* If a specific clk_csr value is passed from the platform
* this means that the CSR Clock Range selection cannot be