diff options
| author |   Eric Anholt <eric@anholt.net> | 2016-06-01 12:05:34 -0700 |
|---|---|---|
| committer |   Stephen Boyd <sboyd@codeaurora.org> | 2016-09-07 08:57:22 -0700 |
| commit | eddcbe8398fc7103fccd22aa6df6917caf0123bf (patch) | |
| tree | 2d9fb24ae78a480f82b903c3ebd67d6b845ba905 /drivers/clk/bcm | |
| parent | clk: bcm2835: Mark the VPU clock as critical (diff) | |
| download | linux-dev-eddcbe8398fc7103fccd22aa6df6917caf0123bf.tar.xz linux-dev-eddcbe8398fc7103fccd22aa6df6917caf0123bf.zip | |
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 <eric@anholt.net>
Acked-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'drivers/clk/bcm')
| -rw-r--r-- | drivers/clk/bcm/clk-bcm2835.c | 10 |
1 files changed, 9 insertions, 1 deletions
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( |