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iio: frequency: adf4350: Add support for dt bindings

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Per review feedback from Lars-Peter Clausen <lars@metafoo.de>
Changes since V1:
	Fix return value handling of adf4350_parse_dt()
	Use of_get_gpio
	Avoid abbreviations in devicetree properties
	Fix typo in docs

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Michael Hennerich
2013-06-03 14:30:00 +01:00
committed by Jonathan Cameron
parent 9404fa15f2
commit e764df6796
2 changed files with 213 additions and 1 deletions
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128
drivers/iio/frequency/adf4350.c
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@@ -18,6 +18,8 @@
#include <linux/gpio.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>
@@ -375,14 +377,138 @@ static const struct iio_info adf4350_info = {
.driver_module = THIS_MODULE,
};
#ifdef CONFIG_OF
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) {
dev_err(dev, "could not allocate memory for platform data\n");
return NULL;
}
strncpy(&pdata->name[0], np->name, SPI_NAME_SIZE - 1);
tmp = 10000;
of_property_read_u32(np, "adi,channel-spacing", &tmp);
pdata->channel_spacing = tmp;
tmp = 0;
of_property_read_u32(np, "adi,power-up-frequency", &tmp);
pdata->power_up_frequency = tmp;
tmp = 0;
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,
"adi,reference-div2-enable");
/* r2_user_settings */
pdata->r2_user_settings = of_property_read_bool(np,
"adi,phase-detector-polarity-positive-enable") ?
ADF4350_REG2_PD_POLARITY_POS : 0;
pdata->r2_user_settings |= of_property_read_bool(np,
"adi,lock-detect-precision-6ns-enable") ?
ADF4350_REG2_LDP_6ns : 0;
pdata->r2_user_settings |= of_property_read_bool(np,
"adi,lock-detect-function-integer-n-enable") ?
ADF4350_REG2_LDF_INT_N : 0;
tmp = 2500;
of_property_read_u32(np, "adi,charge-pump-current", &tmp);
pdata->r2_user_settings |= ADF4350_REG2_CHARGE_PUMP_CURR_uA(tmp);
tmp = 0;
of_property_read_u32(np, "adi,muxout-select", &tmp);
pdata->r2_user_settings |= ADF4350_REG2_MUXOUT(tmp);
pdata->r2_user_settings |= of_property_read_bool(np,
"adi,low-spur-mode-enable") ?
ADF4350_REG2_NOISE_MODE(0x3) : 0;
/* r3_user_settings */
pdata->r3_user_settings = of_property_read_bool(np,
"adi,cycle-slip-reduction-enable") ?
ADF4350_REG3_12BIT_CSR_EN : 0;
pdata->r3_user_settings |= of_property_read_bool(np,
"adi,charge-cancellation-enable") ?
ADF4351_REG3_CHARGE_CANCELLATION_EN : 0;
pdata->r3_user_settings |= of_property_read_bool(np,
"adi,anti-backlash-3ns-enable") ?
ADF4351_REG3_ANTI_BACKLASH_3ns_EN : 0;
pdata->r3_user_settings |= of_property_read_bool(np,
"adi,band-select-clock-mode-high-enable") ?
ADF4351_REG3_BAND_SEL_CLOCK_MODE_HIGH : 0;
tmp = 0;
of_property_read_u32(np, "adi,12bit-clk-divider", &tmp);
pdata->r3_user_settings |= ADF4350_REG3_12BIT_CLKDIV(tmp);
tmp = 0;
of_property_read_u32(np, "adi,clk-divider-mode", &tmp);
pdata->r3_user_settings |= ADF4350_REG3_12BIT_CLKDIV_MODE(tmp);
/* r4_user_settings */
pdata->r4_user_settings = of_property_read_bool(np,
"adi,aux-output-enable") ?
ADF4350_REG4_AUX_OUTPUT_EN : 0;
pdata->r4_user_settings |= of_property_read_bool(np,
"adi,aux-output-fundamental-enable") ?
ADF4350_REG4_AUX_OUTPUT_FUND : 0;
pdata->r4_user_settings |= of_property_read_bool(np,
"adi,mute-till-lock-enable") ?
ADF4350_REG4_MUTE_TILL_LOCK_EN : 0;
tmp = 0;
of_property_read_u32(np, "adi,output-power", &tmp);
pdata->r4_user_settings |= ADF4350_REG4_OUTPUT_PWR(tmp);
tmp = 0;
of_property_read_u32(np, "adi,aux-output-power", &tmp);
pdata->r4_user_settings |= ADF4350_REG4_AUX_OUTPUT_PWR(tmp);
return pdata;
}
#else
static
struct adf4350_platform_data *adf4350_parse_dt(struct device *dev)
{
return NULL;
}
#endif
static int adf4350_probe(struct spi_device *spi)
{
struct adf4350_platform_data *pdata = spi->dev.platform_data;
struct adf4350_platform_data *pdata;
struct iio_dev *indio_dev;
struct adf4350_state *st;
struct clk *clk = NULL;
int ret;
if (spi->dev.of_node) {
pdata = adf4350_parse_dt(&spi->dev);
if (pdata == NULL)
return -EINVAL;
} else {
pdata = spi->dev.platform_data;
}
if (!pdata) {
dev_warn(&spi->dev, "no platform data? using default\n");
pdata = &default_pdata;