Merge tag 'renesas-clk-for-v6.19-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers into clk-renesas

Pull Renesas clk driver updates from Geert Uytterhoeven:

 - Various fixes for the module reset procedure on R-Car Gen4 SoCs
 - Add ADC and thermal (TSU) clocks on RZ/T2H and RZ/N2H
 - Add USB clocks and resets on RZ/G3E
 - Add ISP and display (DSI, LCDC) clocks and resets on RZ/V2H and RZ/V2N
 - Add thermal (TSU) and RTC clocks and resets on RZ/V2H
 - Add reset support on RZ/T2H and RZ/N2H
 - Fix the module stop disable procedure on RZ/T2H and RZ/N2H
 - Add camera (CRU) clocks and resets on RZ/V2N

* tag 'renesas-clk-for-v6.19-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers: (21 commits)
  clk: renesas: r9a09g056: Add clock and reset entries for ISP
  clk: renesas: r9a09g056: Add support for PLLVDO, CRU clocks, and resets
  clk: renesas: r9a09g056: Add clocks and resets for DSI and LCDC modules
  clk: renesas: r9a09g077: Add TSU module clock
  clk: renesas: r9a09g057: Add clock and reset entries for DSI and LCDC
  clk: renesas: rzv2h: Add support for DSI clocks
  clk: renesas: rzv2h: Use GENMASK for PLL fields
  clk: renesas: rzv2h: Add instance field to struct pll
  clk: renesas: r9a09g057: Add clock and reset entries for RTC
  clk: renesas: cpg-mssr: Spelling s/offets/offsets/
  clk: renesas: r9a09g057: Add clock and reset entries for TSU
  clk: renesas: cpg-mssr: Add read-back and delay handling for RZ/T2H MSTP
  clk: renesas: cpg-mssr: Add module reset support for RZ/T2H
  clk: renesas: r9a09g057: Add clock and reset entries for ISP
  clk: renesas: r9a09g047: Add clock and reset entries for USB2
  clk: renesas: Use IS_ERR() for pointers that cannot be NULL
  dt-bindings: clock: renesas,r9a09g047-cpg: Add USB2 PHY core clocks
  clk: renesas: cpg-lib: Remove unneeded semicolon
  clk: renesas: r9a09g077: Add ADC module clocks
  clk: renesas: cpg-mssr: Read back reset registers to assure values latched
  ...

2 files changed, 147 insertions, 0 deletions

diff --git a/include/dt-bindings/clock/renesas,r9a09g047-cpg.h b/include/dt-bindings/clock/renesas,r9a09g047-cpg.h
index f165df8a6f5a..dab24740de3c 100644
--- a/include/dt-bindings/clock/renesas,r9a09g047-cpg.h
+++ b/include/dt-bindings/clock/renesas,r9a09g047-cpg.h
@@ -22,5 +22,7 @@
 #define R9A09G047_GBETH_1_CLK_PTP_REF_I		11
 #define R9A09G047_USB3_0_REF_ALT_CLK_P		12
 #define R9A09G047_USB3_0_CLKCORE		13
+#define R9A09G047_USB2_0_CLK_CORE0		14
+#define R9A09G047_USB2_0_CLK_CORE1		15
 
 #endif /* __DT_BINDINGS_CLOCK_RENESAS_R9A09G047_CPG_H__ */
diff --git a/include/linux/clk/renesas.h b/include/linux/clk/renesas.h
index 0ebbe2f0b45e..69d8159deee3 100644
--- a/include/linux/clk/renesas.h
+++ b/include/linux/clk/renesas.h
@@ -10,7 +10,9 @@
 #ifndef __LINUX_CLK_RENESAS_H_
 #define __LINUX_CLK_RENESAS_H_
 
+#include <linux/clk-provider.h>
 #include <linux/types.h>
+#include <linux/units.h>
 
 struct device;
 struct device_node;
@@ -32,4 +34,147 @@ void cpg_mssr_detach_dev(struct generic_pm_domain *unused, struct device *dev);
 #define cpg_mssr_attach_dev	NULL
 #define cpg_mssr_detach_dev	NULL
 #endif
+
+/**
+ * struct rzv2h_pll_limits - PLL parameter constraints
+ *
+ * This structure defines the minimum and maximum allowed values for
+ * various parameters used to configure a PLL. These limits ensure
+ * the PLL operates within valid and stable ranges.
+ *
+ * @fout: Output frequency range (in MHz)
+ * @fout.min: Minimum allowed output frequency
+ * @fout.max: Maximum allowed output frequency
+ *
+ * @fvco: PLL oscillation frequency range (in MHz)
+ * @fvco.min: Minimum allowed VCO frequency
+ * @fvco.max: Maximum allowed VCO frequency
+ *
+ * @m: Main-divider range
+ * @m.min: Minimum main-divider value
+ * @m.max: Maximum main-divider value
+ *
+ * @p: Pre-divider range
+ * @p.min: Minimum pre-divider value
+ * @p.max: Maximum pre-divider value
+ *
+ * @s: Divider range
+ * @s.min: Minimum divider value
+ * @s.max: Maximum divider value
+ *
+ * @k: Delta-sigma modulator range (signed)
+ * @k.min: Minimum delta-sigma value
+ * @k.max: Maximum delta-sigma value
+ */
+struct rzv2h_pll_limits {
+	struct {
+		u32 min;
+		u32 max;
+	} fout;
+
+	struct {
+		u32 min;
+		u32 max;
+	} fvco;
+
+	struct {
+		u16 min;
+		u16 max;
+	} m;
+
+	struct {
+		u8 min;
+		u8 max;
+	} p;
+
+	struct {
+		u8 min;
+		u8 max;
+	} s;
+
+	struct {
+		s16 min;
+		s16 max;
+	} k;
+};
+
+/**
+ * struct rzv2h_pll_pars - PLL configuration parameters
+ *
+ * This structure contains the configuration parameters for the
+ * Phase-Locked Loop (PLL), used to achieve a specific output frequency.
+ *
+ * @m: Main divider value
+ * @p: Pre-divider value
+ * @s: Output divider value
+ * @k: Delta-sigma modulation value
+ * @freq_millihz: Calculated PLL output frequency in millihertz
+ * @error_millihz: Frequency error from target in millihertz (signed)
+ */
+struct rzv2h_pll_pars {
+	u16 m;
+	u8 p;
+	u8 s;
+	s16 k;
+	u64 freq_millihz;
+	s64 error_millihz;
+};
+
+/**
+ * struct rzv2h_pll_div_pars - PLL parameters with post-divider
+ *
+ * This structure is used for PLLs that include an additional post-divider
+ * stage after the main PLL block. It contains both the PLL configuration
+ * parameters and the resulting frequency/error values after the divider.
+ *
+ * @pll: Main PLL configuration parameters (see struct rzv2h_pll_pars)
+ *
+ * @div: Post-divider configuration and result
+ * @div.divider_value: Divider applied to the PLL output
+ * @div.freq_millihz: Output frequency after divider in millihertz
+ * @div.error_millihz: Frequency error from target in millihertz (signed)
+ */
+struct rzv2h_pll_div_pars {
+	struct rzv2h_pll_pars pll;
+	struct {
+		u8 divider_value;
+		u64 freq_millihz;
+		s64 error_millihz;
+	} div;
+};
+
+#define RZV2H_CPG_PLL_DSI_LIMITS(name)					\
+	static const struct rzv2h_pll_limits (name) = {			\
+		.fout = { .min = 25 * MEGA, .max = 375 * MEGA },	\
+		.fvco = { .min = 1600 * MEGA, .max = 3200 * MEGA },	\
+		.m = { .min = 64, .max = 533 },				\
+		.p = { .min = 1, .max = 4 },				\
+		.s = { .min = 0, .max = 6 },				\
+		.k = { .min = -32768, .max = 32767 },			\
+	}								\
+
+#ifdef CONFIG_CLK_RZV2H
+bool rzv2h_get_pll_pars(const struct rzv2h_pll_limits *limits,
+			struct rzv2h_pll_pars *pars, u64 freq_millihz);
+
+bool rzv2h_get_pll_divs_pars(const struct rzv2h_pll_limits *limits,
+			     struct rzv2h_pll_div_pars *pars,
+			     const u8 *table, u8 table_size, u64 freq_millihz);
+#else
+static inline bool rzv2h_get_pll_pars(const struct rzv2h_pll_limits *limits,
+				      struct rzv2h_pll_pars *pars,
+				      u64 freq_millihz)
+{
+	return false;
+}
+
+static inline bool rzv2h_get_pll_divs_pars(const struct rzv2h_pll_limits *limits,
+					   struct rzv2h_pll_div_pars *pars,
+					   const u8 *table, u8 table_size,
+					   u64 freq_millihz)
+{
+	return false;
+}
+#endif
+
 #endif