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

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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.

Change-Id: I6d64815ee93c5c604ec0bea86eca00aca570bb9e
Signed-off-by: Mike Tipton <mdtipton@codeaurora.org>
This commit is contained in:
Mike Tipton 2021-02-01 15:59:57 -08:00
commit 8941f6ff4b
1 changed files with 4 additions and 1 deletions
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5
drivers/clk/qcom/clk-rpmh.c
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@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
* Copyright (c) 2018-2021, The Linux Foundation. All rights reserved.
*/
#include <linux/clk-provider.h>
@ -280,6 +280,9 @@ static int clk_rpmh_bcm_send_cmd(struct clk_rpmh *c, bool enable)
cmd_state = c->aggr_state;
}
if (cmd_state > BCM_TCS_CMD_VOTE_MASK)
cmd_state = BCM_TCS_CMD_VOTE_MASK;
if (c->last_sent_aggr_state == cmd_state) {
mutex_unlock(&rpmh_clk_lock);
return 0;