[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20240325210025.1448717-3-cristian.marussi@arm.com>
Date: Mon, 25 Mar 2024 21:00:22 +0000
From: Cristian Marussi <cristian.marussi@....com>
To: linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-clk@...r.kernel.org
Cc: sudeep.holla@....com,
james.quinlan@...adcom.com,
f.fainelli@...il.com,
vincent.guittot@...aro.org,
peng.fan@....nxp.com,
michal.simek@....com,
quic_sibis@...cinc.com,
quic_nkela@...cinc.com,
souvik.chakravarty@....com,
mturquette@...libre.com,
sboyd@...nel.org,
Cristian Marussi <cristian.marussi@....com>
Subject: [PATCH v2 2/5] clk: scmi: Add support for state control restricted clocks
Some exposed SCMI Clocks could be marked as non-supporting state changes.
Configure a clk_ops descriptor which does not provide the state change
callbacks for such clocks when registering with CLK framework.
CC: Michael Turquette <mturquette@...libre.com>
CC: Stephen Boyd <sboyd@...nel.org>
CC: linux-clk@...r.kernel.org
Signed-off-by: Cristian Marussi <cristian.marussi@....com>
---
drivers/clk/clk-scmi.c | 22 +++++++++++++++-------
1 file changed, 15 insertions(+), 7 deletions(-)
diff --git a/drivers/clk/clk-scmi.c b/drivers/clk/clk-scmi.c
index d5d369b052bd..fc9603988d91 100644
--- a/drivers/clk/clk-scmi.c
+++ b/drivers/clk/clk-scmi.c
@@ -18,6 +18,7 @@
enum scmi_clk_feats {
SCMI_CLK_ATOMIC_SUPPORTED,
+ SCMI_CLK_STATE_CTRL_FORBIDDEN,
SCMI_CLK_MAX_FEATS
};
@@ -230,15 +231,19 @@ scmi_clk_ops_alloc(struct device *dev, unsigned long feats_key)
* only the prepare/unprepare API, as allowed by the clock framework
* when atomic calls are not available.
*/
- if (feats_key & BIT(SCMI_CLK_ATOMIC_SUPPORTED)) {
- ops->enable = scmi_clk_atomic_enable;
- ops->disable = scmi_clk_atomic_disable;
- ops->is_enabled = scmi_clk_atomic_is_enabled;
- } else {
- ops->prepare = scmi_clk_enable;
- ops->unprepare = scmi_clk_disable;
+ if (!(feats_key & BIT(SCMI_CLK_STATE_CTRL_FORBIDDEN))) {
+ if (feats_key & BIT(SCMI_CLK_ATOMIC_SUPPORTED)) {
+ ops->enable = scmi_clk_atomic_enable;
+ ops->disable = scmi_clk_atomic_disable;
+ } else {
+ ops->prepare = scmi_clk_enable;
+ ops->unprepare = scmi_clk_disable;
+ }
}
+ if (feats_key & BIT(SCMI_CLK_ATOMIC_SUPPORTED))
+ ops->is_enabled = scmi_clk_atomic_is_enabled;
+
/* Rate ops */
ops->recalc_rate = scmi_clk_recalc_rate;
ops->round_rate = scmi_clk_round_rate;
@@ -288,6 +293,9 @@ scmi_clk_ops_select(struct scmi_clk *sclk, bool atomic_capable,
if (atomic_capable && ci->enable_latency <= atomic_threshold)
feats_key |= BIT(SCMI_CLK_ATOMIC_SUPPORTED);
+ if (ci->state_ctrl_forbidden)
+ feats_key |= BIT(SCMI_CLK_STATE_CTRL_FORBIDDEN);
+
/* Lookup previously allocated ops */
ops = clk_ops_db[feats_key];
if (!ops) {
--
2.44.0
Powered by blists - more mailing lists