clk: renesas: r9a09g056: 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: Lad Prabhakar <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Link: https://lore.kernel.org/[email protected]
Signed-off-by: Geert Uytterhoeven <[email protected]>

Author: prabhakarlad

drivers/clk/renesas/r9a09g056-cpg.c

@@ -16,7 +16,7 @@
 
 enum clk_ids {
 	/* Core Clock Outputs exported to DT */
-	LAST_DT_CORE_CLK = R9A09G056_GBETH_1_CLK_PTP_REF_I,
+	LAST_DT_CORE_CLK = R9A09G056_SPI_CLK_SPI,
 
 	/* External Input Clocks */
 	CLK_AUDIO_EXTAL,
@@ -32,7 +32,13 @@ enum clk_ids {
 	CLK_PLLGPU,
 
 	/* 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,
@@ -62,6 +68,14 @@ static const struct clk_div_table dtable_1_8[] = {
 	{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},
@@ -83,6 +97,8 @@ static const char * const smux2_gbe0_rxclk[] = { ".plleth_gbe0", "et0_rxclk" };
 static const char * const smux2_gbe0_txclk[] = { ".plleth_gbe0", "et0_txclk" };
 static const char * const smux2_gbe1_rxclk[] = { ".plleth_gbe1", "et1_rxclk" };
 static const char * const smux2_gbe1_txclk[] = { ".plleth_gbe1", "et1_txclk" };
+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 r9a09g056_core_clks[] __initconst = {
 	/* External Clock Inputs */
@@ -99,7 +115,14 @@ static const struct cpg_core_clk r9a09g056_core_clks[] __initconst = {
 	DEF_PLL(".pllgpu", CLK_PLLGPU, CLK_QEXTAL, PLLGPU),
 
 	/* 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),