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| author | Dmitry Osipenko <digetx@gmail.com> | 2020-11-15 23:34:32 +0300 |
|---|---|---|
| committer | Stephen Boyd <sboyd@kernel.org> | 2020-12-17 12:43:32 +0300 |
| commit | bf6d43d7232511d4aadb634ec97fcbe5d49ee120 (patch) | |
| tree | 9968111d544d238493b9bfc99275ddb61c09c0e3 /drivers/clk/clk.c | |
| parent | 3650b228f83adda7e5ee532e2b90429c03f7b9ec (diff) | |
| download | linux-bf6d43d7232511d4aadb634ec97fcbe5d49ee120.tar.xz | |
clk: Add hardware-enable column to clk summary
Add "hardware enable" column to the clk summary in order to show actual
hardware enable-state of all clocks. The possible states are "Y/N/?",
where question mark means that state is unknown, i.e. clock isn't a
mux and clk-driver doesn't support is_enabled() callback for this clock.
In conjunction with clk_ignore_unused, this tells us what unused clocks
are left enabled after bootloader. This is also a useful aid for
debugging interactions with firmware which changes clock states without
notifying kernel.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/20201115203432.13934-1-digetx@gmail.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Diffstat (limited to 'drivers/clk/clk.c')
| -rw-r--r-- | drivers/clk/clk.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index f83dac54ed85..c2cbf3618680 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -2931,7 +2931,14 @@ static void clk_summary_show_one(struct seq_file *s, struct clk_core *c, else seq_puts(s, "-----"); - seq_printf(s, " %6d\n", clk_core_get_scaled_duty_cycle(c, 100000)); + seq_printf(s, " %6d", clk_core_get_scaled_duty_cycle(c, 100000)); + + if (c->ops->is_enabled) + seq_printf(s, " %9c\n", clk_core_is_enabled(c) ? 'Y' : 'N'); + else if (!c->ops->enable) + seq_printf(s, " %9c\n", 'Y'); + else + seq_printf(s, " %9c\n", '?'); } static void clk_summary_show_subtree(struct seq_file *s, struct clk_core *c, @@ -2950,9 +2957,9 @@ static int clk_summary_show(struct seq_file *s, void *data) struct clk_core *c; struct hlist_head **lists = (struct hlist_head **)s->private; - seq_puts(s, " enable prepare protect duty\n"); - seq_puts(s, " clock count count count rate accuracy phase cycle\n"); - seq_puts(s, "---------------------------------------------------------------------------------------------\n"); + seq_puts(s, " enable prepare protect duty hardware\n"); + seq_puts(s, " clock count count count rate accuracy phase cycle enable\n"); + seq_puts(s, "-------------------------------------------------------------------------------------------------------\n"); clk_prepare_lock(); |