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clk: tegra: Support BPMP-FW ABI deny flags 

Support BPMP_CLK_STATE_CHANGE_DENIED by not populating state changing
operations when the flag is set.

Support BPMP_CLK_RATE_PARENT_CHANGE_DENIED by not populating rate or
parent changing operations when the flag is set.

Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Peter De Schrijver 2022-10-27 15:13:55 +03:00 committed by Thierry Reding
parent c78ba3cf38
commit 1d9e77b644
1 changed files with 34 additions and 3 deletions
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37
drivers/clk/tegra/clk-bpmp.c
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@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2016-2020 NVIDIA Corporation
* Copyright (C) 2016-2022 NVIDIA Corporation
*/
#include <linux/clk-provider.h>
@ -310,6 +310,23 @@ static const struct clk_ops tegra_bpmp_clk_mux_rate_ops = {
.set_rate = tegra_bpmp_clk_set_rate,
};
static const struct clk_ops tegra_bpmp_clk_mux_read_only_ops = {
.get_parent = tegra_bpmp_clk_get_parent,
.recalc_rate = tegra_bpmp_clk_recalc_rate,
};
static const struct clk_ops tegra_bpmp_clk_read_only_ops = {
.recalc_rate = tegra_bpmp_clk_recalc_rate,
};
static const struct clk_ops tegra_bpmp_clk_gate_mux_read_only_ops = {
.prepare = tegra_bpmp_clk_prepare,
.unprepare = tegra_bpmp_clk_unprepare,
.is_prepared = tegra_bpmp_clk_is_prepared,
.recalc_rate = tegra_bpmp_clk_recalc_rate,
.get_parent = tegra_bpmp_clk_get_parent,
};
static int tegra_bpmp_clk_get_max_id(struct tegra_bpmp *bpmp)
{
struct cmd_clk_get_max_clk_id_response response;
@ -510,8 +527,22 @@ tegra_bpmp_clk_register(struct tegra_bpmp *bpmp,
memset(&init, 0, sizeof(init));
init.name = info->name;
clk->hw.init = &init;
if (info->flags & TEGRA_BPMP_CLK_HAS_MUX) {
if (info->flags & BPMP_CLK_STATE_CHANGE_DENIED) {
if ((info->flags & BPMP_CLK_RATE_PARENT_CHANGE_DENIED) == 0) {
dev_WARN(bpmp->dev,
"Firmware bug! Inconsistent permission bits for clock %s. State and parent/rate changes disabled.",
init.name);
}
if (info->flags & TEGRA_BPMP_CLK_HAS_MUX)
init.ops = &tegra_bpmp_clk_mux_read_only_ops;
else
init.ops = &tegra_bpmp_clk_read_only_ops;
} else if (info->flags & BPMP_CLK_RATE_PARENT_CHANGE_DENIED) {
if (info->flags & TEGRA_BPMP_CLK_HAS_MUX)
init.ops = &tegra_bpmp_clk_gate_mux_read_only_ops;
else
init.ops = &tegra_bpmp_clk_gate_ops;
} else if (info->flags & TEGRA_BPMP_CLK_HAS_MUX) {
if (info->flags & TEGRA_BPMP_CLK_HAS_SET_RATE)
init.ops = &tegra_bpmp_clk_mux_rate_ops;
else