clk/zynq/clkc: Add CLK_SET_RATE_PARENT flag to ethernet muxes

Zynq's Ethernet clocks are created by the following hierarchy:
	mux0 ---> div0 ---> div1 ---> mux1 ---> gate
Rate change requests on the gate have to propagate all the way up to
div0 to properly leverage all dividers. Mux1 was missing the
CLK_SET_RATE_PARENT flag, which is required to achieve this.

This does not fix a specific regression but the clock driver was merged
for 3.11-rc1, so best to fix the known bugs before the release.

Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
[mturquette@linaro.org: added to changelog]

diff --git a/drivers/clk/zynq/clkc.c b/drivers/clk/zynq/clkc.c
index 515a5732d391ccbbd83a9347c32f72cb46ae4e5d..089d3e30e2216e44b20067fdaf9ded66708d0bb2 100644 (file)
--- a/drivers/clk/zynq/clkc.c
+++ b/drivers/clk/zynq/clkc.c
@@ -365,8 +365,9 @@ static void __init zynq_clk_setup(struct device_node *np)
                        CLK_SET_RATE_PARENT, SLCR_GEM0_CLK_CTRL, 20, 6,
                        CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
                        &gem0clk_lock);
-       clk = clk_register_mux(NULL, "gem0_emio_mux", gem0_mux_parents, 2, 0,
-                       SLCR_GEM0_CLK_CTRL, 6, 1, 0, &gem0clk_lock);
+       clk = clk_register_mux(NULL, "gem0_emio_mux", gem0_mux_parents, 2,
+                       CLK_SET_RATE_PARENT, SLCR_GEM0_CLK_CTRL, 6, 1, 0,
+                       &gem0clk_lock);
        clks[gem0] = clk_register_gate(NULL, clk_output_name[gem0],
                        "gem0_emio_mux", CLK_SET_RATE_PARENT,
                        SLCR_GEM0_CLK_CTRL, 0, 0, &gem0clk_lock);
@@ -387,8 +388,9 @@ static void __init zynq_clk_setup(struct device_node *np)
                        CLK_SET_RATE_PARENT, SLCR_GEM1_CLK_CTRL, 20, 6,
                        CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
                        &gem1clk_lock);
-       clk = clk_register_mux(NULL, "gem1_emio_mux", gem1_mux_parents, 2, 0,
-                       SLCR_GEM1_CLK_CTRL, 6, 1, 0, &gem1clk_lock);
+       clk = clk_register_mux(NULL, "gem1_emio_mux", gem1_mux_parents, 2,
+                       CLK_SET_RATE_PARENT, SLCR_GEM1_CLK_CTRL, 6, 1, 0,
+                       &gem1clk_lock);
        clks[gem1] = clk_register_gate(NULL, clk_output_name[gem1],
                        "gem1_emio_mux", CLK_SET_RATE_PARENT,
                        SLCR_GEM1_CLK_CTRL, 0, 0, &gem1clk_lock);