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clk: qcom: clk-rpmh: Fix overflow in BCM vote

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commit a4e5af27e6f6a8b0d14bc0d7eb04f4a6c7291586 upstream.

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@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mike Tipton 2024-08-09 10:51:29 +05:30 • committed by Ksawlii
parent 343ee53332
commit e9b6741221
1 changed files with 2 additions and 0 deletions
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2
drivers/clk/qcom/clk-rpmh.c
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@ -270,6 +270,8 @@ static int clk_rpmh_bcm_send_cmd(struct clk_rpmh *c, bool enable)
cmd_state = 0;
}
cmd_state = min(cmd_state, BCM_TCS_CMD_VOTE_MASK);
if (c->last_sent_aggr_state != cmd_state) {
cmd.addr = c->res_addr;
cmd.data = BCM_TCS_CMD(1, enable, 0, cmd_state);