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 093694e00caec6e133eb26712f890691cad999aa..33bfa2008479153402d188d71d382f0274c104ea 100644 (file)
--- a/drivers/clk/bcm/clk-bcm2835.c
+++ b/drivers/clk/bcm/clk-bcm2835.c
@@ -1266,6 +1266,11 @@ 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;