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iio: adf4350: Convert to use GPIO descriptor 

The lock detect GPIO line is better to grab using
a GPIO descriptor. We drop the pdata for this: clients using board
files can use machine descriptor tables to pass this GPIO from
static data.

Cc: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
alistair/sensors
Linus Walleij 2019-12-02 09:38:30 +01:00 committed by Jonathan Cameron
parent dcfb6dbdfb
commit 4a89d2f47c
2 changed files with 8 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
drivers/iio/frequency/adf4350.c
View File

@ -14,11 +14,10 @@
#include <linux/err.h>
#include <linux/module.h>
#include <linux/gcd.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <asm/div64.h>
#include <linux/clk.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
@ -34,6 +33,7 @@ enum {
struct adf4350_state {
struct spi_device *spi;
struct regulator *reg;
struct gpio_desc *lock_detect_gpiod;
struct adf4350_platform_data *pdata;
struct clk *clk;
unsigned long clkin;
@ -61,7 +61,6 @@ static struct adf4350_platform_data default_pdata = {
.r3_user_settings = ADF4350_REG3_12BIT_CLKDIV_MODE(0),
.r4_user_settings = ADF4350_REG4_OUTPUT_PWR(3) |
ADF4350_REG4_MUTE_TILL_LOCK_EN,
.gpio_lock_detect = -1,
};
static int adf4350_sync_config(struct adf4350_state *st)
@ -317,8 +316,8 @@ static ssize_t adf4350_read(struct iio_dev *indio_dev,
(u64)st->fpfd;
do_div(val, st->r1_mod * (1 << st->r4_rf_div_sel));
/* PLL unlocked? return error */
if (gpio_is_valid(st->pdata->gpio_lock_detect))
if (!gpio_get_value(st->pdata->gpio_lock_detect)) {
if (st->lock_detect_gpiod)
if (!gpiod_get_value(st->lock_detect_gpiod)) {
dev_dbg(&st->spi->dev, "PLL un-locked\n");
ret = -EBUSY;
}
@ -381,7 +380,6 @@ static struct adf4350_platform_data *adf4350_parse_dt(struct device *dev)
struct device_node *np = dev->of_node;
struct adf4350_platform_data *pdata;
unsigned int tmp;
int ret;
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
@ -401,12 +399,6 @@ static struct adf4350_platform_data *adf4350_parse_dt(struct device *dev)
of_property_read_u32(np, "adi,reference-div-factor", &tmp);
pdata->ref_div_factor = tmp;
ret = of_get_gpio(np, 0);
if (ret < 0)
pdata->gpio_lock_detect = -1;
else
pdata->gpio_lock_detect = ret;
pdata->ref_doubler_en = of_property_read_bool(np,
"adi,reference-doubler-enable");
pdata->ref_div2_en = of_property_read_bool(np,
@ -561,16 +553,10 @@ static int adf4350_probe(struct spi_device *spi)
memset(st->regs_hw, 0xFF, sizeof(st->regs_hw));
if (gpio_is_valid(pdata->gpio_lock_detect)) {
ret = devm_gpio_request(&spi->dev, pdata->gpio_lock_detect,
indio_dev->name);
if (ret) {
dev_err(&spi->dev, "fail to request lock detect GPIO-%d",
pdata->gpio_lock_detect);
goto error_disable_reg;
}
gpio_direction_input(pdata->gpio_lock_detect);
}
st->lock_detect_gpiod = devm_gpiod_get_optional(&spi->dev, NULL,
GPIOD_IN);
if (IS_ERR(st->lock_detect_gpiod))
return PTR_ERR(st->lock_detect_gpiod);
if (pdata->power_up_frequency) {
ret = adf4350_set_freq(st, pdata->power_up_frequency);

4
include/linux/iio/frequency/adf4350.h
View File

@ -103,9 +103,6 @@
* @r2_user_settings: User defined settings for ADF4350/1 REGISTER_2.
* @r3_user_settings: User defined settings for ADF4350/1 REGISTER_3.
* @r4_user_settings: User defined settings for ADF4350/1 REGISTER_4.
* @gpio_lock_detect: Optional, if set with a valid GPIO number,
* pll lock state is tested upon read.
* If not used - set to -1.
*/
struct adf4350_platform_data {
@ -121,7 +118,6 @@ struct adf4350_platform_data {
unsigned r2_user_settings;
unsigned r3_user_settings;
unsigned r4_user_settings;
int gpio_lock_detect;
};
#endif /* IIO_PLL_ADF4350_H_ */