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wlcore/wl12xx: spi: add power operation function

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The power function uses a consumer regulator access to update the WiFi
enable GPIO value.

Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>
Tested-By: Sebastian Reichel <sre@kernel.org>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Uri Mashiach 2015-12-30 15:35:31 +02:00 committed by Kalle Valo
parent 7a26019fde
commit 4c1ce07bcf
1 changed files with 39 additions and 0 deletions
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39
drivers/net/wireless/ti/wlcore/spi.c
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@ -30,6 +30,7 @@
#include <linux/spi/spi.h>
#include <linux/wl12xx.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include "wlcore.h"
#include "wl12xx_80211.h"
@ -81,6 +82,7 @@
struct wl12xx_spi_glue {
struct device *dev;
struct platform_device *core;
struct regulator *reg; /* Power regulator */
};
static void wl12xx_spi_reset(struct device *child)
@ -318,11 +320,40 @@ static int __must_check wl12xx_spi_raw_write(struct device *child, int addr,
return 0;
}
/**
* wl12xx_spi_set_power - power on/off the wl12xx unit
* @child: wl12xx device handle.
* @enable: true/false to power on/off the unit.
*
* use the WiFi enable regulator to enable/disable the WiFi unit.
*/
static int wl12xx_spi_set_power(struct device *child, bool enable)
{
int ret = 0;
struct wl12xx_spi_glue *glue = dev_get_drvdata(child->parent);
WARN_ON(!glue->reg);
/* Update regulator state */
if (enable) {
ret = regulator_enable(glue->reg);
if (ret)
dev_err(child, "Power enable failure\n");
} else {
ret = regulator_disable(glue->reg);
if (ret)
dev_err(child, "Power disable failure\n");
}
return ret;
}
static struct wl1271_if_operations spi_ops = {
.read = wl12xx_spi_raw_read,
.write = wl12xx_spi_raw_write,
.reset = wl12xx_spi_reset,
.init = wl12xx_spi_init,
.power = wl12xx_spi_set_power,
.set_block_size = NULL,
};
@ -353,6 +384,14 @@ static int wl1271_probe(struct spi_device *spi)
* comes from the board-peripherals file */
spi->bits_per_word = 32;
glue->reg = devm_regulator_get(&spi->dev, "vwlan");
if (PTR_ERR(glue->reg) == -EPROBE_DEFER)
return -EPROBE_DEFER;
if (IS_ERR(glue->reg)) {
dev_err(glue->dev, "can't get regulator\n");
return PTR_ERR(glue->reg);
}
ret = spi_setup(spi);
if (ret < 0) {
dev_err(glue->dev, "spi_setup failed\n");