[PATCH wireless-next v2 4/8] bcma: chipcommon: enable asynchronous GPIO interrupts

[Alessio Ferri <alessio.ferri@mythread.it>]

Set CORECTL_ASYNCGPIO on chipcommon rev 21 and later, as Broadcom's
driver does at attach, so that GPIO interrupts are generated without the
backplane clock.

Signed-off-by: Alessio Ferri <alessio.ferri@mythread.it>
---
 drivers/bcma/driver_chipcommon.c            | 3 +++
 include/linux/bcma/bcma_driver_chipcommon.h | 1 +
 2 files changed, 4 insertions(+)

diff --git a/drivers/bcma/driver_chipcommon.c b/drivers/bcma/driver_chipcommon.c
index fd91a39f0..f5e1b5415 100644
--- a/drivers/bcma/driver_chipcommon.c
+++ b/drivers/bcma/driver_chipcommon.c
@@ -227,6 +227,9 @@ void bcma_core_chipcommon_init(struct bcma_drv_cc *cc)
 			((leddc_on << BCMA_CC_GPIOTIMER_ONTIME_SHIFT) |
 			 (leddc_off << BCMA_CC_GPIOTIMER_OFFTIME_SHIFT)));
 	}
+
+	if (cc->core->id.rev >= 21)
+		bcma_cc_set32(cc, BCMA_CC_CORECTL, BCMA_CC_CORECTL_ASYNCGPIO);
 	cc->ticks_per_ms = bcma_chipco_watchdog_ticks_per_ms(cc);
 
 	cc->setup_done = true;
diff --git a/include/linux/bcma/bcma_driver_chipcommon.h b/include/linux/bcma/bcma_driver_chipcommon.h
index 45c37b6bd..b761801d6 100644
--- a/include/linux/bcma/bcma_driver_chipcommon.h
+++ b/include/linux/bcma/bcma_driver_chipcommon.h
@@ -54,6 +54,7 @@
 #define BCMA_CC_CORECTL			0x0008
 #define  BCMA_CC_CORECTL_UARTCLK0	0x00000001	/* Drive UART with internal clock */
 #define	 BCMA_CC_CORECTL_SE		0x00000002	/* sync clk out enable (corerev >= 3) */
+#define  BCMA_CC_CORECTL_ASYNCGPIO	0x00000004	/* GPIO IRQs without backplane clock */
 #define  BCMA_CC_CORECTL_UARTCLKEN	0x00000008	/* UART clock enable (rev >= 21) */
 #define BCMA_CC_BIST			0x000C
 #define BCMA_CC_OTPS			0x0010		/* OTP status */

-- 
2.34.1