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staging: wilc1000: look for rtc_clk clock in spi mode 

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: Adham Abozaeid <adham.abozaeid@microchip.com>
Link: https://lore.kernel.org/r/20190916193701.20755-1-adham.abozaeid@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Adham Abozaeid 2019-09-16 19:37:08 +00:00 committed by Greg Kroah-Hartman
parent 8399918f30
commit 854d66df74
1 changed files with 11 additions and 0 deletions
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11
drivers/staging/wilc1000/wilc_spi.c
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@ -4,6 +4,7 @@
* All rights reserved.
*/
#include <linux/clk.h>
#include <linux/spi/spi.h>
#include "wilc_wfi_netdevice.h"
@ -132,6 +133,12 @@ static int wilc_bus_probe(struct spi_device *spi)
wilc->bus_data = spi_priv;
wilc->gpio_irq = gpio;
wilc->rtc_clk = devm_clk_get(&spi->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);
return 0;
}
@ -142,6 +149,10 @@ static int wilc_bus_remove(struct spi_device *spi)
/* 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);
return 0;
}