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soc: bcm: bcm2835-pm: Fix error paths of initialization. 

The clock driver may probe after ours and so we need to pass the
-EPROBE_DEFER out.  Fix the other error path while we're here.

v2: Use dom->name instead of dom->gov as the flag for initialized
    domains, since we aren't setting up a governor.  Make sure to
    clear ->clk when no clk is present in the DT.

Signed-off-by: Eric Anholt <eric@anholt.net>
Fixes: 670c672608 ("soc: bcm: bcm2835-pm: Add support for power domains under a new binding.")
This commit is contained in:
Eric Anholt 2019-02-20 10:19:51 -08:00
parent 7f3d6c8e8f
commit 4deabfae64
1 changed files with 30 additions and 5 deletions
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35
drivers/soc/bcm/bcm2835-power.c
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@ -485,7 +485,7 @@ static int bcm2835_power_pd_power_off(struct generic_pm_domain *domain)
}
}
static void
static int
bcm2835_init_power_domain(struct bcm2835_power *power,
int pd_xlate_index, const char *name)
{
@ -493,6 +493,17 @@ bcm2835_init_power_domain(struct bcm2835_power *power,
struct bcm2835_power_domain *dom = &power->domains[pd_xlate_index];
dom->clk = devm_clk_get(dev->parent, name);
if (IS_ERR(dom->clk)) {
int ret = PTR_ERR(dom->clk);
if (ret == -EPROBE_DEFER)
return ret;
/* Some domains don't have a clk, so make sure that we
* don't deref an error pointer later.
*/
dom->clk = NULL;
}
dom->base.name = name;
dom->base.power_on = bcm2835_power_pd_power_on;
@ -505,6 +516,8 @@ bcm2835_init_power_domain(struct bcm2835_power *power,
pm_genpd_init(&dom->base, NULL, true);
power->pd_xlate.domains[pd_xlate_index] = &dom->base;
return 0;
}
/** bcm2835_reset_reset - Resets a block that has a reset line in the
@ -602,7 +615,7 @@ static int bcm2835_power_probe(struct platform_device *pdev)
{ BCM2835_POWER_DOMAIN_IMAGE_PERI, BCM2835_POWER_DOMAIN_CAM0 },
{ BCM2835_POWER_DOMAIN_IMAGE_PERI, BCM2835_POWER_DOMAIN_CAM1 },
};
int ret, i;
int ret = 0, i;
u32 id;
power = devm_kzalloc(dev, sizeof(*power), GFP_KERNEL);
@ -629,8 +642,11 @@ static int bcm2835_power_probe(struct platform_device *pdev)
power->pd_xlate.num_domains = ARRAY_SIZE(power_domain_names);
for (i = 0; i < ARRAY_SIZE(power_domain_names); i++)
bcm2835_init_power_domain(power, i, power_domain_names[i]);
for (i = 0; i < ARRAY_SIZE(power_domain_names); i++) {
ret = bcm2835_init_power_domain(power, i, power_domain_names[i]);
if (ret)
goto fail;
}
for (i = 0; i < ARRAY_SIZE(domain_deps); i++) {
pm_genpd_add_subdomain(&power->domains[domain_deps[i].parent].base,
@ -644,12 +660,21 @@ static int bcm2835_power_probe(struct platform_device *pdev)
ret = devm_reset_controller_register(dev, &power->reset);
if (ret)
return ret;
goto fail;
of_genpd_add_provider_onecell(dev->parent->of_node, &power->pd_xlate);
dev_info(dev, "Broadcom BCM2835 power domains driver");
return 0;
fail:
for (i = 0; i < ARRAY_SIZE(power_domain_names); i++) {
struct generic_pm_domain *dom = &power->domains[i].base;
if (dom->name)
pm_genpd_remove(dom);
}
return ret;
}
static int bcm2835_power_remove(struct platform_device *pdev)