rockchip: clk: rk3368: handle clk_enable requests for GMAC
Since commit ba1f96672522 ("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 ba1f96672522 ("net: designware: add clock support")
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Tested-by: Klaus Goger <klaus.goger@theobroma-systems.com>
diff --git a/drivers/clk/rockchip/clk_rk3368.c b/drivers/clk/rockchip/clk_rk3368.c
index 3ac9add..ea00f1f 100644
--- a/drivers/clk/rockchip/clk_rk3368.c
+++ b/drivers/clk/rockchip/clk_rk3368.c
@@ -568,12 +568,31 @@
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)