[PATCH 09/11] clk: sunxi: add critical-clocks property to mux clocks
From: andre.przywara@arm.com (Andre Przywara)
Date: 2016-02-01 17:41:31
Also in:
linux-clk, lkml
Subsystem:
arm/allwinner soc clock support, common clk framework, the rest · Maintainers:
Emilio López, Michael Turquette, Stephen Boyd, Linus Torvalds
The only reason we match the different root compatible strings when registering the different sunxi clock types is to provide a list of critical clocks. Tell the mux clock (for a start) to get this property from the device tree, allowing new SoCs to refer to the generic fallback compatible string when the DT provides the critical clock information. Signed-off-by: Andre Przywara <andre.przywara@arm.com> --- drivers/clk/sunxi/clk-sunxi.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
index 9416e0f3..e1e5a8f 100644
--- a/drivers/clk/sunxi/clk-sunxi.c
+++ b/drivers/clk/sunxi/clk-sunxi.c@@ -644,6 +644,11 @@ static void __init sunxi_mux_clk_setup(struct device_node *node, goto out_unmap; } + if (of_property_read_bool(node, "critical-clocks")) { + pr_debug("marked clock %s as critical\n", clk_name); + clk_prepare_enable(clk); + } + of_clk_add_provider(node, of_clk_src_simple_get, clk); clk_register_clkdev(clk, clk_name, NULL); return;
@@ -1064,6 +1069,10 @@ CLK_OF_DECLARE(sun8i_a23_clk_init, "allwinner,sun8i-a23", sun6i_init_clocks); CLK_OF_DECLARE(sun8i_a33_clk_init, "allwinner,sun8i-a33", sun6i_init_clocks); CLK_OF_DECLARE(sun8i_h3_clk_init, "allwinner,sun8i-h3", sun6i_init_clocks); +/* + * Those SoCs here either don't have a specific critical clock to + * protect or they mark the critical clocks as such in their DT. + */ static void __init sunxi_generic_init_clocks(struct device_node *node) { sunxi_init_clocks(NULL, 0);
--
2.6.4