From eddcbe8398fc7103fccd22aa6df6917caf0123bf Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Wed, 1 Jun 2016 12:05:34 -0700 Subject: clk: bcm2835: Mark GPIO clocks enabled at boot as critical These divide off of PLLD_PER and are used for the ethernet and wifi PHYs source PLLs. Neither of them is currently represented by a phy device that would grab the clock for us. This keeps other drivers from killing the networking PHYs when they disable their own clocks and trigger PLLD_PER's refcount going to 0. Signed-off-by: Eric Anholt Acked-by: Martin Sperl Signed-off-by: Stephen Boyd --- drivers/clk/bcm/clk-bcm2835.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'drivers/clk/bcm') diff --git a/drivers/clk/bcm/clk-bcm2835.c b/drivers/clk/bcm/clk-bcm2835.c index d9db03cb3fd8..400615baea97 100644 --- a/drivers/clk/bcm/clk-bcm2835.c +++ b/drivers/clk/bcm/clk-bcm2835.c @@ -1239,6 +1239,12 @@ static struct clk *bcm2835_register_clock(struct bcm2835_cprman *cprman, } else { init.ops = &bcm2835_clock_clk_ops; init.flags |= CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE; + + /* If the clock wasn't actually enabled at boot, it's not + * critical. + */ + if (!(cprman_read(cprman, data->ctl_reg) & CM_ENABLE)) + init.flags &= ~CLK_IS_CRITICAL; } clock = devm_kzalloc(cprman->dev, sizeof(*clock), GFP_KERNEL); @@ -1708,13 +1714,15 @@ static const struct bcm2835_clk_desc clk_desc_array[] = { .div_reg = CM_GP1DIV, .int_bits = 12, .frac_bits = 12, + .flags = CLK_IS_CRITICAL, .is_mash_clock = true), [BCM2835_CLOCK_GP2] = REGISTER_PER_CLK( .name = "gp2", .ctl_reg = CM_GP2CTL, .div_reg = CM_GP2DIV, .int_bits = 12, - .frac_bits = 12), + .frac_bits = 12, + .flags = CLK_IS_CRITICAL), /* HDMI state machine */ [BCM2835_CLOCK_HSM] = REGISTER_PER_CLK( -- cgit v1.2.3