clk: ti: dra7x: prevent non-existing clkctrl clocks from registering

Certain clkctrl clocks (like the USB_OTG_SS4) do not exist on some
variants of the dra7x SoC. Append a flag for these clocks and skip
the registration in cases where the clocks do not exist.

Reported-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/ti/clkctrl.c

@@ -446,6 +446,7 @@ static void __init _ti_omap4_clkctrl_setup(struct device_node *node)
 	u32 addr;
 	int ret;
 	char *c;
+	u16 soc_mask = 0;
 
 	if (!(ti_clk_get_features()->flags & TI_CLK_CLKCTRL_COMPAT) &&
 	    of_node_name_eq(node, "clk"))
@@ -469,6 +470,13 @@ static void __init _ti_omap4_clkctrl_setup(struct device_node *node)
 		else
 			data = dra7_clkctrl_data;
 	}
+
+	if (of_machine_is_compatible("ti,dra72"))
+		soc_mask = CLKF_SOC_DRA72;
+	if (of_machine_is_compatible("ti,dra74"))
+		soc_mask = CLKF_SOC_DRA74;
+	if (of_machine_is_compatible("ti,dra76"))
+		soc_mask = CLKF_SOC_DRA76;
 #endif
 #ifdef CONFIG_SOC_AM33XX
 	if (of_machine_is_compatible("ti,am33xx")) {
@@ -562,6 +570,12 @@ static void __init _ti_omap4_clkctrl_setup(struct device_node *node)
 	reg_data = data->regs;
 
 	while (reg_data->parent) {
+		if ((reg_data->flags & CLKF_SOC_MASK) &&
+		    (reg_data->flags & soc_mask) == 0) {
+			reg_data++;
+			continue;
+		}
+
 		hw = kzalloc(sizeof(*hw), GFP_KERNEL);
 		if (!hw)
 			return;