clk: fixed-factor: add optional accuracy support

Fixed factor clock reports the parent clock accuracy. Add flags and acc
fields to `struct clk_fixed_factor` to support setting a fixed
accuracy. The default if no flag is set is not changed: use the parent
clock accuracy.

Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240221-mbly-clk-v7-1-31d4ce3630c3@bootlin.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

1 files changed, 11 insertions, 1 deletions

diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 1293c38ddb7f..7ddc952c8c67 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -1084,18 +1084,28 @@ void of_fixed_factor_clk_setup(struct device_node *node);
  * @hw:		handle between common and hardware-specific interfaces
  * @mult:	multiplier
  * @div:	divider
+ * @acc:	fixed accuracy in ppb
+ * @flags:	behavior modifying flags
  *
  * Clock with a fixed multiplier and divider. The output frequency is the
  * parent clock rate divided by div and multiplied by mult.
- * Implements .recalc_rate, .set_rate and .round_rate
+ * Implements .recalc_rate, .set_rate, .round_rate and .recalc_accuracy
+ *
+ * Flags:
+ * * CLK_FIXED_FACTOR_FIXED_ACCURACY - Use the value in @acc instead of the
+ *                                     parent clk accuracy.
  */
 
 struct clk_fixed_factor {
 	struct clk_hw	hw;
 	unsigned int	mult;
 	unsigned int	div;
+	unsigned long	acc;
+	unsigned int	flags;
 };
 
+#define CLK_FIXED_FACTOR_FIXED_ACCURACY	BIT(0)
+
 #define to_clk_fixed_factor(_hw) container_of(_hw, struct clk_fixed_factor, hw)
 
 extern const struct clk_ops clk_fixed_factor_ops;