Messages in this thread Patch in this message | | | From | Andy Shevchenko <> | Subject | [PATCH v2 2/3] clk: fractional-divider: Show numerator and denominator in debugfs | Date | Tue, 22 Nov 2022 15:07:31 +0200 |
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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> --- v2: no changes drivers/clk/clk-fractional-divider.c | 36 ++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+)
diff --git a/drivers/clk/clk-fractional-divider.c b/drivers/clk/clk-fractional-divider.c index 5c6f1d0f8fb4..b6b52b79d671 100644 --- a/drivers/clk/clk-fractional-divider.c +++ b/drivers/clk/clk-fractional-divider.c @@ -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); -- 2.35.1
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