pinctrl: apple: Use a raw spinlock for the regmap

The irqchip ops are called with a raw spinlock held, so the subsequent
regmap usage cannot use a plain spinlock.

spi-hid-apple-of spi0.0: spihid_apple_of_probe:74

=============================
[ BUG: Invalid wait context ]
5.18.0-asahi-00176-g0fa3ab03bdea #1337 Not tainted
-----------------------------
kworker/u20:3/86 is trying to lock:
ffff8000166b5018 (pinctrl_apple_gpio:462:(&regmap_config)->lock){....}-{3:3}, at: regmap_lock_spinlock+0x18/0x30
other info that might help us debug this:
context-{5:5}
7 locks held by kworker/u20:3/86:
 #0: ffff800017725d48 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x1c8/0x670
 #1: ffff80001e33bdd0 (deferred_probe_work){+.+.}-{0:0}, at: process_one_work+0x1c8/0x670
 #2: ffff800017d629a0 (&dev->mutex){....}-{4:4}, at: __device_attach+0x30/0x17c
 #3: ffff80002414e618 (&ctlr->add_lock){+.+.}-{4:4}, at: spi_add_device+0x40/0x80
 #4: ffff800024116990 (&dev->mutex){....}-{4:4}, at: __device_attach+0x30/0x17c
 #5: ffff800022d4be58 (request_class){+.+.}-{4:4}, at: __setup_irq+0xa8/0x720
 #6: ffff800022d4bcc8 (lock_class){....}-{2:2}, at: __setup_irq+0xcc/0x720

Fixes: a0f160ffcb83 ("pinctrl: add pinctrl/GPIO driver for Apple SoCs")
Signed-off-by: Hector Martin <marcan@marcan.st>
Link: https://lore.kernel.org/r/20220524142206.18833-1-marcan@marcan.st
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/pinctrl/pinctrl-apple-gpio.c b/drivers/pinctrl/pinctrl-apple-gpio.c
index bc1b663..2490384 100644 (file)
--- a/drivers/pinctrl/pinctrl-apple-gpio.c
+++ b/drivers/pinctrl/pinctrl-apple-gpio.c
@@ -71,6 +71,7 @@ struct regmap_config regmap_config = {
        .max_register = 512 * sizeof(u32),
        .num_reg_defaults_raw = 512,
        .use_relaxed_mmio = true,
+       .use_raw_spinlock = true,
 };
 
 /* No locking needed to mask/unmask IRQs as the interrupt mode is per pin-register. */