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rockchip: clk: rk3368: handle clk_enable requests for GMAC

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Since commit ba1f966725 ("net: designware: add clock support"), the
designware GMAC driver enables all referenced clocks. While this is a
no-op for the RK3368 during boot-up (reset behaviour has all the clock
gates open anyway), we still need to handle the clock-ids passed in
the enable op of the clock-driver and return a success.

This change extends the RK3368 clk driver to:
(a) provide a enable op
(b) signals success to the caller when the clocks for the GMAC are
    enabled (no actual action is necessary as the gates are open
    after reset)

References: commit ba1f966725 ("net: designware: add clock support")
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Tested-by: Klaus Goger <klaus.goger@theobroma-systems.com>
This commit is contained in:
Philipp Tomsich 2018-02-16 16:07:25 +01:00
parent a9bdd67653
commit 35a69a3b01
1 changed files with 19 additions and 0 deletions
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19
drivers/clk/rockchip/clk_rk3368.c
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@ -568,12 +568,31 @@ static int __maybe_unused rk3368_clk_set_parent(struct clk *clk, struct clk *par
return -ENOENT;
}
static int rk3368_clk_enable(struct clk *clk)
{
switch (clk->id) {
case SCLK_MAC:
case SCLK_MAC_RX:
case SCLK_MAC_TX:
case SCLK_MACREF:
case SCLK_MACREF_OUT:
case ACLK_GMAC:
case PCLK_GMAC:
/* Required to successfully probe the Designware GMAC driver */
return 0;
}
debug("%s: unsupported clk %ld\n", __func__, clk->id);
return -ENOENT;
}
static struct clk_ops rk3368_clk_ops = {
.get_rate = rk3368_clk_get_rate,
.set_rate = rk3368_clk_set_rate,
#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
.set_parent = rk3368_clk_set_parent,
#endif
.enable = rk3368_clk_enable,
};
static int rk3368_clk_probe(struct udevice *dev)