clk: renesas: r9a09g047: Add support for xspi mux and divider

The mux smux2_xspi_clk{0,1} used for selecting spi and spix2 clocks and
pllcm33_xspi divider to select different clock rates. Add support for
both.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250424081400.135028-3-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Author: bijudas

drivers/clk/renesas/r9a09g047-cpg.c

@@ -16,7 +16,7 @@
 
 enum clk_ids {
 	/* Core Clock Outputs exported to DT */
-	LAST_DT_CORE_CLK = R9A09G047_IOTOP_0_SHCLK,
+	LAST_DT_CORE_CLK = R9A09G047_GBETH_1_CLK_PTP_REF_I,
 
 	/* External Input Clocks */
 	CLK_AUDIO_EXTAL,
@@ -31,7 +31,13 @@ enum clk_ids {
 	CLK_PLLVDO,
 
 	/* Internal Core Clocks */
+	CLK_PLLCM33_DIV3,
+	CLK_PLLCM33_DIV4,
+	CLK_PLLCM33_DIV5,
 	CLK_PLLCM33_DIV16,
+	CLK_SMUX2_XSPI_CLK0,
+	CLK_SMUX2_XSPI_CLK1,
+	CLK_PLLCM33_XSPI,
 	CLK_PLLCLN_DIV2,
 	CLK_PLLCLN_DIV8,
 	CLK_PLLCLN_DIV16,
@@ -61,6 +67,14 @@ static const struct clk_div_table dtable_2_4[] = {
 	{0, 0},
 };
 
+static const struct clk_div_table dtable_2_16[] = {
+	{0, 2},
+	{1, 4},
+	{2, 8},
+	{3, 16},
+	{0, 0},
+};
+
 static const struct clk_div_table dtable_2_64[] = {
 	{0, 2},
 	{1, 4},
@@ -70,6 +84,10 @@ static const struct clk_div_table dtable_2_64[] = {
 	{0, 0},
 };
 
+/* Mux clock tables */
+static const char * const smux2_xspi_clk0[] = { ".pllcm33_div3", ".pllcm33_div4" };
+static const char * const smux2_xspi_clk1[] = { ".smux2_xspi_clk0", ".pllcm33_div5" };
+
 static const struct cpg_core_clk r9a09g047_core_clks[] __initconst = {
 	/* External Clock Inputs */
 	DEF_INPUT("audio_extal", CLK_AUDIO_EXTAL),
@@ -84,8 +102,15 @@ static const struct cpg_core_clk r9a09g047_core_clks[] __initconst = {
 	DEF_FIXED(".pllvdo", CLK_PLLVDO, CLK_QEXTAL, 105, 2),
 
 	/* Internal Core Clocks */
+	DEF_FIXED(".pllcm33_div3", CLK_PLLCM33_DIV3, CLK_PLLCM33, 1, 3),
+	DEF_FIXED(".pllcm33_div4", CLK_PLLCM33_DIV4, CLK_PLLCM33, 1, 4),
+	DEF_FIXED(".pllcm33_div5", CLK_PLLCM33_DIV5, CLK_PLLCM33, 1, 5),
 	DEF_FIXED(".pllcm33_div16", CLK_PLLCM33_DIV16, CLK_PLLCM33, 1, 16),
 
+	DEF_SMUX(".smux2_xspi_clk0", CLK_SMUX2_XSPI_CLK0, SSEL1_SELCTL2, smux2_xspi_clk0),
+	DEF_SMUX(".smux2_xspi_clk1", CLK_SMUX2_XSPI_CLK1, SSEL1_SELCTL3, smux2_xspi_clk1),
+	DEF_CSDIV(".pllcm33_xspi", CLK_PLLCM33_XSPI, CLK_SMUX2_XSPI_CLK1, CSDIV0_DIVCTL3,
+		  dtable_2_16),
 	DEF_FIXED(".pllcln_div2", CLK_PLLCLN_DIV2, CLK_PLLCLN, 1, 2),
 	DEF_FIXED(".pllcln_div8", CLK_PLLCLN_DIV8, CLK_PLLCLN, 1, 8),
 	DEF_FIXED(".pllcln_div16", CLK_PLLCLN_DIV16, CLK_PLLCLN, 1, 16),

drivers/clk/renesas/rzv2h-cpg.h

@@ -93,10 +93,12 @@ struct smuxed {
 		.width = (_width), \
 	})
 
+#define CPG_SSEL1		(0x304)
 #define CPG_CDDIV0		(0x400)
 #define CPG_CDDIV1		(0x404)
 #define CPG_CDDIV3		(0x40C)
 #define CPG_CDDIV4		(0x410)
+#define CPG_CSDIV0		(0x500)
 
 #define CDDIV0_DIVCTL1	DDIV_PACK(CPG_CDDIV0, 4, 3, 1)
 #define CDDIV0_DIVCTL2	DDIV_PACK(CPG_CDDIV0, 8, 3, 2)
@@ -111,6 +113,11 @@ struct smuxed {
 #define CDDIV4_DIVCTL1	DDIV_PACK(CPG_CDDIV4, 4, 1, 17)
 #define CDDIV4_DIVCTL2	DDIV_PACK(CPG_CDDIV4, 8, 1, 18)
 
+#define CSDIV0_DIVCTL3	DDIV_PACK_NO_RMW(CPG_CSDIV0, 12, 2, CSDIV_NO_MON)
+
+#define SSEL1_SELCTL2	SMUX_PACK(CPG_SSEL1, 8, 1)
+#define SSEL1_SELCTL3	SMUX_PACK(CPG_SSEL1, 12, 1)
+
 #define BUS_MSTOP_IDX_MASK	GENMASK(31, 16)
 #define BUS_MSTOP_BITS_MASK	GENMASK(15, 0)
 #define BUS_MSTOP(idx, mask)	(FIELD_PREP_CONST(BUS_MSTOP_IDX_MASK, (idx)) | \