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authorDmitry Osipenko <digetx@gmail.com>2020-11-15 23:34:32 +0300
committerStephen Boyd <sboyd@kernel.org>2020-12-17 12:43:32 +0300
commitbf6d43d7232511d4aadb634ec97fcbe5d49ee120 (patch)
tree9968111d544d238493b9bfc99275ddb61c09c0e3 /drivers/clk/clk.c
parent3650b228f83adda7e5ee532e2b90429c03f7b9ec (diff)
downloadlinux-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.c15
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();