clk: renesas: r9a07g044: Add ethernet clock sources

Ethernet reference clock can be sourced from PLL5_FOUT3 or PLL6. Add
support for ethernet source clock selection using SEL_PLL_6_2 mux.

This patch also renames the PLL5_DIV2 core clock to PLL5_250 to match
with the register description as mentioned in RZ/G2L HW manual (Rev.1.00).

Signed-off-by: Biju Das <[email protected]>
Reviewed-by: Lad Prabhakar <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Geert Uytterhoeven <[email protected]>

Author: bijudas

drivers/clk/renesas/r9a07g044-cpg.c

@@ -35,8 +35,10 @@ enum clk_ids {
 	CLK_PLL3_DIV4,
 	CLK_PLL4,
 	CLK_PLL5,
-	CLK_PLL5_DIV2,
+	CLK_PLL5_FOUT3,
+	CLK_PLL5_250,
 	CLK_PLL6,
+	CLK_PLL6_250,
 	CLK_P1_DIV2,
 
 	/* Module Clocks */
@@ -53,6 +55,9 @@ static const struct clk_div_table dtable_1_32[] = {
 	{0, 0},
 };
 
+/* Mux clock tables */
+static const char * const sel_pll6_2[]	= { ".pll6_250", ".pll5_250" };
+
 static const struct cpg_core_clk r9a07g044_core_clks[] __initconst = {
 	/* External Clock Inputs */
 	DEF_INPUT("extal", CLK_EXTAL),
@@ -64,6 +69,11 @@ static const struct cpg_core_clk r9a07g044_core_clks[] __initconst = {
 	DEF_FIXED(".pll2", CLK_PLL2, CLK_EXTAL, 133, 2),
 	DEF_FIXED(".pll3", CLK_PLL3, CLK_EXTAL, 133, 2),
 
+	DEF_FIXED(".pll5", CLK_PLL5, CLK_EXTAL, 125, 1),
+	DEF_FIXED(".pll5_fout3", CLK_PLL5_FOUT3, CLK_PLL5, 1, 6),
+
+	DEF_FIXED(".pll6", CLK_PLL6, CLK_EXTAL, 125, 6),
+
 	DEF_FIXED(".pll2_div2", CLK_PLL2_DIV2, CLK_PLL2, 1, 2),
 	DEF_FIXED(".pll2_div16", CLK_PLL2_DIV16, CLK_PLL2, 1, 16),
 	DEF_FIXED(".pll2_div20", CLK_PLL2_DIV20, CLK_PLL2, 1, 20),
@@ -73,6 +83,9 @@ static const struct cpg_core_clk r9a07g044_core_clks[] __initconst = {
 	DEF_FIXED(".pll3_div2_4_2", CLK_PLL3_DIV2_4_2, CLK_PLL3_DIV2_4, 1, 2),
 	DEF_FIXED(".pll3_div4", CLK_PLL3_DIV4, CLK_PLL3, 1, 4),
 
+	DEF_FIXED(".pll5_250", CLK_PLL5_250, CLK_PLL5_FOUT3, 1, 2),
+	DEF_FIXED(".pll6_250", CLK_PLL6_250, CLK_PLL6, 1, 2),
+
 	/* Core output clk */
 	DEF_FIXED("I", R9A07G044_CLK_I, CLK_PLL1, 1, 1),
 	DEF_DIV("P0", R9A07G044_CLK_P0, CLK_PLL2_DIV16, DIVPL2A,
@@ -84,6 +97,10 @@ static const struct cpg_core_clk r9a07g044_core_clks[] __initconst = {
 	DEF_FIXED("P1_DIV2", CLK_P1_DIV2, R9A07G044_CLK_P1, 1, 2),
 	DEF_DIV("P2", R9A07G044_CLK_P2, CLK_PLL3_DIV2_4_2,
 		DIVPL3A, dtable_1_32, CLK_DIVIDER_HIWORD_MASK),
+	DEF_FIXED("M0", R9A07G044_CLK_M0, CLK_PLL3_DIV2_4, 1, 1),
+	DEF_FIXED("ZT", R9A07G044_CLK_ZT, CLK_PLL3_DIV2_4_2, 1, 1),
+	DEF_MUX("HP", R9A07G044_CLK_HP, SEL_PLL6_2,
+		sel_pll6_2, ARRAY_SIZE(sel_pll6_2), 0, CLK_MUX_HIWORD_MASK),
 };
 
 static struct rzg2l_mod_clk r9a07g044_mod_clks[] = {

drivers/clk/renesas/rzg2l-cpg.h

@@ -11,6 +11,7 @@
 
 #define CPG_PL2_DDIV		(0x204)
 #define CPG_PL3A_DDIV		(0x208)
+#define CPG_PL6_ETH_SSEL	(0x418)
 
 /* n = 0/1/2 for PLL1/4/6 */
 #define CPG_SAMPLL_CLK1(n)	(0x04 + (16 * n))
@@ -27,6 +28,8 @@
 #define SEL_PLL_PACK(offset, bitpos, size) \
 		(((offset) << 20) | ((bitpos) << 12) | ((size) << 8))
 
+#define SEL_PLL6_2	SEL_PLL_PACK(CPG_PL6_ETH_SSEL, 0, 1)
+
 /**
  * Definitions of CPG Core Clocks
  *