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]>
raspberrypi · Feb 20, 2017 · ce8f06e · ce8f06e
1 parent 36345ea
commit ce8f06e
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/drivers/clk/bcm/clk-bcm2835.c b/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;