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staging: wilc1000: look for rtc_clk clock 

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>
Link: https://lore.kernel.org/r/1568037993-4646-2-git-send-email-eugen.hristev@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Eugen Hristev 2019-09-09 14:12:29 +00:00 committed by Greg Kroah-Hartman
parent ae8779e198
commit 8692b047e8
2 changed files with 15 additions and 0 deletions
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14
drivers/staging/wilc1000/wilc_sdio.c
View File

@ -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);

1
drivers/staging/wilc1000/wilc_wfi_netdevice.h
View File

@ -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;