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clk: fractional-divider: Show numerator and denominator in debugfs

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It's very useful to see what are the values of the fractional divider.
For that, add respective debugfs files.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20221122130732.48537-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Andy Shevchenko 2022-11-22 15:07:31 +02:00 committed by Stephen Boyd
parent 7fffdb7773
commit ac49a19280
1 changed files with 36 additions and 0 deletions
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36
drivers/clk/clk-fractional-divider.c
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@ -39,6 +39,7 @@
*/
#include <linux/clk-provider.h>
#include <linux/debugfs.h>
#include <linux/io.h>
#include <linux/math.h>
#include <linux/module.h>
@ -193,10 +194,45 @@ static int clk_fd_set_rate(struct clk_hw *hw, unsigned long rate,
return 0;
}
#ifdef CONFIG_DEBUG_FS
static int clk_fd_numerator_get(void *hw, u64 *val)
{
struct u32_fract fract;
clk_fd_get_div(hw, &fract);
*val = fract.numerator;
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(clk_fd_numerator_fops, clk_fd_numerator_get, NULL, "%llu\n");
static int clk_fd_denominator_get(void *hw, u64 *val)
{
struct u32_fract fract;
clk_fd_get_div(hw, &fract);
*val = fract.denominator;
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(clk_fd_denominator_fops, clk_fd_denominator_get, NULL, "%llu\n");
static void clk_fd_debug_init(struct clk_hw *hw, struct dentry *dentry)
{
debugfs_create_file("numerator", 0444, dentry, hw, &clk_fd_numerator_fops);
debugfs_create_file("denominator", 0444, dentry, hw, &clk_fd_denominator_fops);
}
#endif
const struct clk_ops clk_fractional_divider_ops = {
.recalc_rate = clk_fd_recalc_rate,
.round_rate = clk_fd_round_rate,
.set_rate = clk_fd_set_rate,
#ifdef CONFIG_DEBUG_FS
.debug_init = clk_fd_debug_init,
#endif
};
EXPORT_SYMBOL_GPL(clk_fractional_divider_ops);