clk: renesas: r9a07g044: Change core clock "I" from DEF_FIXED->DEF_DIV

Core clock "I" is sourced from CPG_PL1_DDIV divider as per HW manual
Rev.1.00.

This patch adds clock divider table "dtable_1_8" and switches to
DEF_DIV for "I" clock.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20211112081003.15453-3-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Author: bijudas

drivers/clk/renesas/r9a07g044-cpg.c

@@ -56,6 +56,14 @@ enum clk_ids {
 };
 
 /* Divider tables */
+static const struct clk_div_table dtable_1_8[] = {
+	{0, 1},
+	{1, 2},
+	{2, 4},
+	{3, 8},
+	{0, 0},
+};
+
 static const struct clk_div_table dtable_1_32[] = {
 	{0, 1},
 	{1, 2},
@@ -110,7 +118,8 @@ static const struct cpg_core_clk r9a07g044_core_clks[] __initconst = {
 	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("I", R9A07G044_CLK_I, CLK_PLL1, DIVPL1A, dtable_1_8,
+		CLK_DIVIDER_HIWORD_MASK),
 	DEF_DIV("P0", R9A07G044_CLK_P0, CLK_PLL2_DIV2_8, DIVPL2A,
 		dtable_1_32, CLK_DIVIDER_HIWORD_MASK),
 	DEF_FIXED("P0_DIV2", R9A07G044_CLK_P0_DIV2, R9A07G044_CLK_P0, 1, 2),