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media: cxd2880-spi: Add optional vcc regulator

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This patchset adds an optional VCC regulator to the driver probe function
to make sure power is enabled to the module before starting attaching to
the device.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Yasunari Takiguchi <Yasunari.Takiguchi@sony.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Neil Armstrong 2018-11-08 07:50:09 -05:00 committed by Mauro Carvalho Chehab
parent 6c0943cdb5
commit cb496cd472
1 changed files with 16 additions and 0 deletions
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16
drivers/media/spi/cxd2880-spi.c
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@ -10,6 +10,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
#include <linux/spi/spi.h>
#include <linux/regulator/consumer.h>
#include <linux/ktime.h>
#include <media/dvb_demux.h>
@ -51,6 +52,7 @@ struct cxd2880_dvb_spi {
struct mutex spi_mutex; /* For SPI access exclusive control */
int feed_count;
int all_pid_feed_count;
struct regulator *vcc_supply;
u8 *ts_buf;
struct cxd2880_pid_filter_config filter_config;
};
@ -518,6 +520,17 @@ cxd2880_spi_probe(struct spi_device *spi)
if (!dvb_spi)
return -ENOMEM;
dvb_spi->vcc_supply = devm_regulator_get_optional(&spi->dev, "vcc");
if (IS_ERR(dvb_spi->vcc_supply)) {
if (PTR_ERR(dvb_spi->vcc_supply) == -EPROBE_DEFER)
return -EPROBE_DEFER;
dvb_spi->vcc_supply = NULL;
} else {
ret = regulator_enable(dvb_spi->vcc_supply);
if (ret)
return ret;
}
dvb_spi->spi = spi;
mutex_init(&dvb_spi->spi_mutex);
dev_set_drvdata(&spi->dev, dvb_spi);
@ -631,6 +644,9 @@ cxd2880_spi_remove(struct spi_device *spi)
dvb_frontend_detach(&dvb_spi->dvb_fe);
dvb_unregister_adapter(&dvb_spi->adapter);
if (dvb_spi->vcc_supply)
regulator_disable(dvb_spi->vcc_supply);
kfree(dvb_spi);
pr_info("cxd2880_spi remove ok.\n");