clk: renesas: r8a7779: Obtain mode pin values from R-Car RST driver

Obtain the values of the mode pins from the R-Car RST driver, which
relies on the presence in DT of a device node for the RESET/WDT module.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Dirk Behme <dirk.behme@de.bosch.com>

drivers/clk/renesas/clk-r8a7779.c

@@ -18,6 +18,7 @@
 #include <linux/of_address.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
+#include <linux/soc/renesas/rcar-rst.h>
 
 #include <dt-bindings/clock/r8a7779-clock.h>
 
@@ -127,6 +128,10 @@ static void __init r8a7779_cpg_clocks_init(struct device_node *np)
 	struct clk **clks;
 	unsigned int i, plla_mult;
 	int num_clks;
+	u32 mode;
+
+	if (rcar_rst_read_mode_pins(&mode))
+		return;
 
 	num_clks = of_property_count_strings(np, "clock-output-names");
 	if (num_clks < 0) {
@@ -148,8 +153,8 @@ static void __init r8a7779_cpg_clocks_init(struct device_node *np)
 	cpg->data.clks = clks;
 	cpg->data.clk_num = num_clks;
 
-	config = &cpg_clk_configs[CPG_CLK_CONFIG_INDEX(cpg_mode)];
-	plla_mult = cpg_plla_mult[CPG_PLLA_MULT_INDEX(cpg_mode)];
+	config = &cpg_clk_configs[CPG_CLK_CONFIG_INDEX(mode)];
+	plla_mult = cpg_plla_mult[CPG_PLLA_MULT_INDEX(mode)];
 
 	for (i = 0; i < num_clks; ++i) {
 		const char *name;