Commit fa23e091 authored by Cristian Marussi's avatar Cristian Marussi Committed by Stephen Boyd
Browse files

clk: scmi: Add support for re-parenting restricted clocks 



Some exposed SCMI Clocks could be marked as non-supporting re-parenting
changes.
Configure a clk_ops descriptor which does not provide the re-parenting
callbacks for such clocks when registering with CLK framework.

CC: Michael Turquette <mturquette@baylibre.com>
CC: Stephen Boyd <sboyd@kernel.org>
CC: linux-clk@vger.kernel.org
Signed-off-by: default avatarCristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20240415163649.895268-5-cristian.marussi@arm.com


Reviewed-by: default avatarSudeep Holla <sudeep.holla@arm.com>
Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent c3ad1d0a

drivers/clk/clk-scmi.c

+6 −1
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ enum scmi_clk_feats { 
	SCMI_CLK_ATOMIC_SUPPORTED,

	SCMI_CLK_STATE_CTRL_SUPPORTED,

	SCMI_CLK_RATE_CTRL_SUPPORTED,

	SCMI_CLK_PARENT_CTRL_SUPPORTED,

	SCMI_CLK_FEATS_COUNT

};
@@ -254,6 +255,7 @@ scmi_clk_ops_alloc(struct device *dev, unsigned long feats_key) 


	/* Parent ops */

	ops->get_parent = scmi_clk_get_parent;

	if (feats_key & BIT(SCMI_CLK_PARENT_CTRL_SUPPORTED))

		ops->set_parent = scmi_clk_set_parent;



	return ops;
@@ -307,6 +309,9 @@ scmi_clk_ops_select(struct scmi_clk *sclk, bool atomic_capable, 
	if (!ci->rate_ctrl_forbidden)

		feats_key |= BIT(SCMI_CLK_RATE_CTRL_SUPPORTED);



	if (!ci->parent_ctrl_forbidden)

		feats_key |= BIT(SCMI_CLK_PARENT_CTRL_SUPPORTED);



	if (WARN_ON(feats_key >= db_size))

		return NULL;