clk-bcm2835: Mark used PLLs and dividers CRITICAL

The VPU configures and relies on several PLLs and dividers. Mark all
enabled dividers and their PLLs as CRITICAL to prevent the kernel from
switching them off.

Signed-off-by: Phil Elwell <[email protected]>

Author: Phil Elwell

drivers/clk/bcm/clk-bcm2835.c

@@ -1366,6 +1366,11 @@ bcm2835_register_pll_divider(struct bcm2835_cprman *cprman,
 	divider->div.hw.init = &init;
 	divider->div.table = NULL;
 
+	if (!(cprman_read(cprman, data->cm_reg) & data->hold_mask)) {
+		init.flags |= CLK_IS_CRITICAL;
+		divider->div.flags |= CLK_IS_CRITICAL;
+	}
+
 	divider->cprman = cprman;
 	divider->data = data;