From: Andre Przywara andre.przywara@arm.com
[ Upstream commit a98399cbc1e05f7b977419f03905501d566cf54e ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/clocksource/timer-sp804.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/clocksource/timer-sp804.c b/drivers/clocksource/timer-sp804.c index d07863388e05..780699e4d120 100644 --- a/drivers/clocksource/timer-sp804.c +++ b/drivers/clocksource/timer-sp804.c @@ -227,6 +227,11 @@ static int __init sp804_of_init(struct device_node *np) 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; @@ -235,11 +240,6 @@ static int __init sp804_of_init(struct device_node *np) writel(0, base + TIMER_CTRL); writel(0, base + TIMER_2_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;