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clk: scmi: Add support for rate change restricted clocks

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Some exposed SCMI Clocks could be marked as non-supporting rate changes.
Configure a clk_ops descriptors which does not provide the rate change
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: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20240415163649.895268-4-cristian.marussi@arm.com
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Cristian Marussi 2024-04-15 17:36:47 +01:00 committed by Stephen Boyd
parent a1b8faf878
commit c3ad1d0a7e
1 changed files with 6 additions and 1 deletions
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7
drivers/clk/clk-scmi.c
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@ -20,6 +20,7 @@
enum scmi_clk_feats {
SCMI_CLK_ATOMIC_SUPPORTED,
SCMI_CLK_STATE_CTRL_SUPPORTED,
SCMI_CLK_RATE_CTRL_SUPPORTED,
SCMI_CLK_FEATS_COUNT
};
@ -248,7 +249,8 @@ scmi_clk_ops_alloc(struct device *dev, unsigned long feats_key)
ops->recalc_rate = scmi_clk_recalc_rate;
ops->round_rate = scmi_clk_round_rate;
ops->determine_rate = scmi_clk_determine_rate;
ops->set_rate = scmi_clk_set_rate;
if (feats_key & BIT(SCMI_CLK_RATE_CTRL_SUPPORTED))
ops->set_rate = scmi_clk_set_rate;
/* Parent ops */
ops->get_parent = scmi_clk_get_parent;
@ -302,6 +304,9 @@ scmi_clk_ops_select(struct scmi_clk *sclk, bool atomic_capable,
if (!ci->state_ctrl_forbidden)
feats_key |= BIT(SCMI_CLK_STATE_CTRL_SUPPORTED);
if (!ci->rate_ctrl_forbidden)
feats_key |= BIT(SCMI_CLK_RATE_CTRL_SUPPORTED);
if (WARN_ON(feats_key >= db_size))
return NULL;