Valid frequencies may result in BCM votes that exceed the max HW value. Set vote ceiling to BCM_TCS_CMD_VOTE_MASK to ensure the votes aren't truncated, which can result in lower frequencies than desired.
Fixes: 04053f4d23a4 ("clk: qcom: clk-rpmh: Add IPA clock support") Cc: stable@vger.kernel.org Signed-off-by: Mike Tipton quic_mdtipton@quicinc.com Reviewed-by: Taniya Das quic_tdas@quicinc.com Signed-off-by: Imran Shaik quic_imrashai@quicinc.com Link: https://lore.kernel.org/r/20240809-clk-rpmh-bcm-vote-fix-v2-1-240c584b7ef9@q... Signed-off-by: Bjorn Andersson andersson@kernel.org (cherry picked from commit a4e5af27e6f6a8b0d14bc0d7eb04f4a6c7291586) Signed-off-by: Mike Tipton quic_mdtipton@quicinc.com --- drivers/clk/qcom/clk-rpmh.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/clk/qcom/clk-rpmh.c b/drivers/clk/qcom/clk-rpmh.c index d7586e26acd8..f83ac6e8d660 100644 --- a/drivers/clk/qcom/clk-rpmh.c +++ b/drivers/clk/qcom/clk-rpmh.c @@ -270,6 +270,8 @@ static int clk_rpmh_bcm_send_cmd(struct clk_rpmh *c, bool enable) cmd_state = c->aggr_state; }
+ cmd_state = min(cmd_state, BCM_TCS_CMD_VOTE_MASK); + if (c->last_sent_aggr_state == cmd_state) { mutex_unlock(&rpmh_clk_lock); return 0;