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 <phil@raspberrypi.org>

diff --git a/drivers/clk/bcm/clk-bcm2835.c b/drivers/clk/bcm/clk-bcm2835.c
index 136e5d28f9eaeaa10d45382a0f31da9f4adb91ef..4192863778c8009aacfc9a49ee38ad1ca62a01e4 100644 (file)
--- 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;