diff mbox series

[v2,2/2] staging: wilc1000: look for rtc_clk clock

Message ID 1568037993-4646-2-git-send-email-eugen.hristev@microchip.com (mailing list archive)
State Not Applicable
Delegated to: Johannes Berg
Headers show
Series [v2,1/2] staging: dt-bindings: wilc1000: add optional rtc_clk property | expand

Commit Message

Eugen Hristev Sept. 9, 2019, 2:12 p.m. UTC 
From: Eugen Hristev <eugen.hristev@microchip.com>

If rtc_clk is provided from DT, use it and enable it.
This is optional.
The signal may be hardcoded and no need to be requested,
but if DT provides it, use it.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Acked-by: Ajay Singh <ajay.kathat@microchip.com>
---

Changes in v2:
- rebased on staging-next

 drivers/staging/wilc1000/wilc_sdio.c          | 14 ++++++++++++++
 drivers/staging/wilc1000/wilc_wfi_netdevice.h |  1 +
 2 files changed, 15 insertions(+)
diff mbox series

Patch

diff --git a/drivers/staging/wilc1000/wilc_sdio.c b/drivers/staging/wilc1000/wilc_sdio.c
index 2f9aa36..c787c5d 100644
--- a/drivers/staging/wilc1000/wilc_sdio.c
+++ b/drivers/staging/wilc1000/wilc_sdio.c
@@ -4,6 +4,7 @@ 
  * All rights reserved.
  */
 
+#include <linux/clk.h>
 #include <linux/mmc/sdio_func.h>
 #include <linux/mmc/host.h>
 
@@ -151,6 +152,12 @@  static int wilc_sdio_probe(struct sdio_func *func,
 	wilc->dev = &func->dev;
 	wilc->gpio_irq = gpio;
 
+	wilc->rtc_clk = devm_clk_get(&func->card->dev, "rtc_clk");
+	if (PTR_ERR_OR_ZERO(wilc->rtc_clk) == -EPROBE_DEFER)
+		return -EPROBE_DEFER;
+	else if (!IS_ERR(wilc->rtc_clk))
+		clk_prepare_enable(wilc->rtc_clk);
+
 	dev_info(&func->dev, "Driver Initializing success\n");
 	return 0;
 }
@@ -162,6 +169,10 @@  static void wilc_sdio_remove(struct sdio_func *func)
 	/* free the GPIO in module remove */
 	if (wilc->gpio_irq)
 		gpiod_put(wilc->gpio_irq);
+
+	if (!IS_ERR(wilc->rtc_clk))
+		clk_disable_unprepare(wilc->rtc_clk);
+
 	wilc_netdev_cleanup(wilc);
 }
 
@@ -193,6 +204,9 @@  static int wilc_sdio_suspend(struct device *dev)
 	dev_info(dev, "sdio suspend\n");
 	chip_wakeup(wilc);
 
+	if (!IS_ERR(wilc->rtc_clk))
+		clk_disable_unprepare(wilc->rtc_clk);
+
 	if (wilc->suspend_event) {
 		host_sleep_notify(wilc);
 		chip_allow_sleep(wilc);
diff --git a/drivers/staging/wilc1000/wilc_wfi_netdevice.h b/drivers/staging/wilc1000/wilc_wfi_netdevice.h
index 7e7ce94..978a8bd 100644
--- a/drivers/staging/wilc1000/wilc_wfi_netdevice.h
+++ b/drivers/staging/wilc1000/wilc_wfi_netdevice.h
@@ -216,6 +216,7 @@  struct wilc {
 	int io_type;
 	s8 mac_status;
 	struct gpio_desc *gpio_irq;
+	struct clk *rtc_clk;
 	bool initialized;
 	int dev_irq_num;
 	int close;