diff options
| author |   Andre Przywara <andre.przywara@arm.com> | 2022-05-06 17:25:22 +0100 |
|---|---|---|
| committer |   Daniel Lezcano <daniel.lezcano@linaro.org> | 2022-05-18 11:08:52 +0200 |
| commit | a98399cbc1e05f7b977419f03905501d566cf54e (patch) | |
| tree | e2848fa6b718e7b38b2e315ef9ea5c986917bcfb /drivers/clocksource | |
| parent | clocksource/drivers/riscv: Events are stopped during CPU suspend (diff) | |
| download | linux-dev-a98399cbc1e05f7b977419f03905501d566cf54e.tar.xz linux-dev-a98399cbc1e05f7b977419f03905501d566cf54e.zip | |
clocksource/drivers/sp804: Avoid error on multiple instances
When a machine sports more than one SP804 timer instance, we only bring
up the first one, since multiple timers of the same kind are not useful
to Linux. As this is intentional behaviour, we should not return an
error message, as we do today:
===============
[ 0.000800] Failed to initialize '/bus@8000000/motherboard-bus@8000000/iofpga-bus@300000000/timer@120000': -22
===============
Replace the -EINVAL return with a debug message and return 0 instead.
Also we do not reach the init function anymore if the DT node is
disabled (as this is now handled by OF_DECLARE), so remove the explicit
check for that case.
This fixes a long standing bogus error when booting ARM's fastmodels.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20220506162522.3675399-1-andre.przywara@arm.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Diffstat (limited to 'drivers/clocksource')
| -rw-r--r-- | drivers/clocksource/timer-sp804.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/clocksource/timer-sp804.c b/drivers/clocksource/timer-sp804.c index 401d592e85f5..e6a87f4af2b5 100644 --- a/drivers/clocksource/timer-sp804.c +++ b/drivers/clocksource/timer-sp804.c @@ -259,6 +259,11 @@ static int __init sp804_of_init(struct device_node *np, struct sp804_timer *time struct clk *clk1, *clk2; const char *name = of_get_property(np, "compatible", NULL); + if (initialized) { + pr_debug("%pOF: skipping further SP804 timer device\n", np); + return 0; + } + base = of_iomap(np, 0); if (!base) return -ENXIO; @@ -270,11 +275,6 @@ static int __init sp804_of_init(struct device_node *np, struct sp804_timer *time writel(0, timer1_base + timer->ctrl); writel(0, timer2_base + timer->ctrl); - if (initialized || !of_device_is_available(np)) { - ret = -EINVAL; - goto err; - } - clk1 = of_clk_get(np, 0); if (IS_ERR(clk1)) clk1 = NULL; |