From: Andre Przywara <andre.przywara@xxxxxxx> [ 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@xxxxxxx> Reviewed-by: Robin Murphy <robin.murphy@xxxxxxx> Link: https://lore.kernel.org/r/20220506162522.3675399-1-andre.przywara@xxxxxxx Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- 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 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; -- 2.35.1
