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Message-ID: <20200214144425.737cf4f5@archlinux>
Date: Fri, 14 Feb 2020 14:44:25 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: Alexandru Ardelean <alexandru.ardelean@...log.com>
Cc: <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<nuno.sa@...log.com>
Subject: Re: [PATCH v2 8/9] iio: adis16480: Make use of
__adis_initial_startup
On Mon, 10 Feb 2020 15:26:05 +0200
Alexandru Ardelean <alexandru.ardelean@...log.com> wrote:
> From: Nuno Sá <nuno.sa@...log.com>
>
> All actions done in `adis16480_initial_setup()` are now done in
> `__adis_initial_startup()` so, there's no need for code duplication.
> Furthermore, the call to `adis16480_initial_setup()` is done before any
> device configuration since the device will be reset if not already (via
> rst pin). This is actually fixing a potential bug since `adis_reset()` was
> being called after configuring the device which is obviously a problem.
>
> Signed-off-by: Nuno Sá <nuno.sa@...log.com>
> Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
Applied,
Thanks,
Jonathan
> ---
> drivers/iio/imu/adis16480.c | 80 +++++++++++--------------------------
> 1 file changed, 24 insertions(+), 56 deletions(-)
>
> diff --git a/drivers/iio/imu/adis16480.c b/drivers/iio/imu/adis16480.c
> index acbe1701fc2d..cfae0e4476e7 100644
> --- a/drivers/iio/imu/adis16480.c
> +++ b/drivers/iio/imu/adis16480.c
> @@ -822,10 +822,12 @@ static const char * const adis16480_status_error_msgs[] = {
>
> static int adis16480_enable_irq(struct adis *adis, bool enable);
>
> -#define ADIS16480_DATA(_timeouts) \
> +#define ADIS16480_DATA(_prod_id, _timeouts) \
> { \
> .diag_stat_reg = ADIS16480_REG_DIAG_STS, \
> .glob_cmd_reg = ADIS16480_REG_GLOB_CMD, \
> + .prod_id_reg = ADIS16480_REG_PROD_ID, \
> + .prod_id = (_prod_id), \
> .has_paging = true, \
> .read_delay = 5, \
> .write_delay = 5, \
> @@ -888,7 +890,7 @@ static const struct adis16480_chip_info adis16480_chip_info[] = {
> .int_clk = 2460000,
> .max_dec_rate = 2048,
> .filter_freqs = adis16480_def_filter_freqs,
> - .adis_data = ADIS16480_DATA(&adis16485_timeouts),
> + .adis_data = ADIS16480_DATA(16375, &adis16485_timeouts),
> },
> [ADIS16480] = {
> .channels = adis16480_channels,
> @@ -901,7 +903,7 @@ static const struct adis16480_chip_info adis16480_chip_info[] = {
> .int_clk = 2460000,
> .max_dec_rate = 2048,
> .filter_freqs = adis16480_def_filter_freqs,
> - .adis_data = ADIS16480_DATA(&adis16480_timeouts),
> + .adis_data = ADIS16480_DATA(16480, &adis16480_timeouts),
> },
> [ADIS16485] = {
> .channels = adis16485_channels,
> @@ -914,7 +916,7 @@ static const struct adis16480_chip_info adis16480_chip_info[] = {
> .int_clk = 2460000,
> .max_dec_rate = 2048,
> .filter_freqs = adis16480_def_filter_freqs,
> - .adis_data = ADIS16480_DATA(&adis16485_timeouts),
> + .adis_data = ADIS16480_DATA(16485, &adis16485_timeouts),
> },
> [ADIS16488] = {
> .channels = adis16480_channels,
> @@ -927,7 +929,7 @@ static const struct adis16480_chip_info adis16480_chip_info[] = {
> .int_clk = 2460000,
> .max_dec_rate = 2048,
> .filter_freqs = adis16480_def_filter_freqs,
> - .adis_data = ADIS16480_DATA(&adis16485_timeouts),
> + .adis_data = ADIS16480_DATA(16488, &adis16485_timeouts),
> },
> [ADIS16490] = {
> .channels = adis16485_channels,
> @@ -941,7 +943,7 @@ static const struct adis16480_chip_info adis16480_chip_info[] = {
> .max_dec_rate = 4250,
> .filter_freqs = adis16495_def_filter_freqs,
> .has_pps_clk_mode = true,
> - .adis_data = ADIS16480_DATA(&adis16495_timeouts),
> + .adis_data = ADIS16480_DATA(16490, &adis16495_timeouts),
> },
> [ADIS16495_1] = {
> .channels = adis16485_channels,
> @@ -955,7 +957,7 @@ static const struct adis16480_chip_info adis16480_chip_info[] = {
> .max_dec_rate = 4250,
> .filter_freqs = adis16495_def_filter_freqs,
> .has_pps_clk_mode = true,
> - .adis_data = ADIS16480_DATA(&adis16495_1_timeouts),
> + .adis_data = ADIS16480_DATA(16495, &adis16495_1_timeouts),
> },
> [ADIS16495_2] = {
> .channels = adis16485_channels,
> @@ -969,7 +971,7 @@ static const struct adis16480_chip_info adis16480_chip_info[] = {
> .max_dec_rate = 4250,
> .filter_freqs = adis16495_def_filter_freqs,
> .has_pps_clk_mode = true,
> - .adis_data = ADIS16480_DATA(&adis16495_1_timeouts),
> + .adis_data = ADIS16480_DATA(16495, &adis16495_1_timeouts),
> },
> [ADIS16495_3] = {
> .channels = adis16485_channels,
> @@ -983,7 +985,7 @@ static const struct adis16480_chip_info adis16480_chip_info[] = {
> .max_dec_rate = 4250,
> .filter_freqs = adis16495_def_filter_freqs,
> .has_pps_clk_mode = true,
> - .adis_data = ADIS16480_DATA(&adis16495_1_timeouts),
> + .adis_data = ADIS16480_DATA(16495, &adis16495_1_timeouts),
> },
> [ADIS16497_1] = {
> .channels = adis16485_channels,
> @@ -997,7 +999,7 @@ static const struct adis16480_chip_info adis16480_chip_info[] = {
> .max_dec_rate = 4250,
> .filter_freqs = adis16495_def_filter_freqs,
> .has_pps_clk_mode = true,
> - .adis_data = ADIS16480_DATA(&adis16495_1_timeouts),
> + .adis_data = ADIS16480_DATA(16497, &adis16495_1_timeouts),
> },
> [ADIS16497_2] = {
> .channels = adis16485_channels,
> @@ -1011,7 +1013,7 @@ static const struct adis16480_chip_info adis16480_chip_info[] = {
> .max_dec_rate = 4250,
> .filter_freqs = adis16495_def_filter_freqs,
> .has_pps_clk_mode = true,
> - .adis_data = ADIS16480_DATA(&adis16495_1_timeouts),
> + .adis_data = ADIS16480_DATA(16497, &adis16495_1_timeouts),
> },
> [ADIS16497_3] = {
> .channels = adis16485_channels,
> @@ -1025,7 +1027,7 @@ static const struct adis16480_chip_info adis16480_chip_info[] = {
> .max_dec_rate = 4250,
> .filter_freqs = adis16495_def_filter_freqs,
> .has_pps_clk_mode = true,
> - .adis_data = ADIS16480_DATA(&adis16495_1_timeouts),
> + .adis_data = ADIS16480_DATA(16497, &adis16495_1_timeouts),
> },
> };
>
> @@ -1064,40 +1066,6 @@ static int adis16480_enable_irq(struct adis *adis, bool enable)
> return __adis_write_reg_16(adis, ADIS16480_REG_FNCTIO_CTRL, val);
> }
>
> -static int adis16480_initial_setup(struct iio_dev *indio_dev)
> -{
> - struct adis16480 *st = iio_priv(indio_dev);
> - uint16_t prod_id;
> - unsigned int device_id;
> - int ret;
> -
> - adis_reset(&st->adis);
> - msleep(70);
> -
> - ret = adis_write_reg_16(&st->adis, ADIS16480_REG_GLOB_CMD, BIT(1));
> - if (ret)
> - return ret;
> - msleep(30);
> -
> - ret = adis_check_status(&st->adis);
> - if (ret)
> - return ret;
> -
> - ret = adis_read_reg_16(&st->adis, ADIS16480_REG_PROD_ID, &prod_id);
> - if (ret)
> - return ret;
> -
> - ret = sscanf(indio_dev->name, "adis%u\n", &device_id);
> - if (ret != 1)
> - return -EINVAL;
> -
> - if (prod_id != device_id)
> - dev_warn(&indio_dev->dev, "Device ID(%u) and product ID(%u) do not match.",
> - device_id, prod_id);
> -
> - return 0;
> -}
> -
> static int adis16480_config_irq_pin(struct device_node *of_node,
> struct adis16480 *st)
> {
> @@ -1278,18 +1246,22 @@ static int adis16480_probe(struct spi_device *spi)
> if (ret)
> return ret;
>
> - ret = adis16480_config_irq_pin(spi->dev.of_node, st);
> + ret = __adis_initial_startup(&st->adis);
> if (ret)
> return ret;
>
> + ret = adis16480_config_irq_pin(spi->dev.of_node, st);
> + if (ret)
> + goto error_stop_device;
> +
> ret = adis16480_get_ext_clocks(st);
> if (ret)
> - return ret;
> + goto error_stop_device;
>
> if (!IS_ERR_OR_NULL(st->ext_clk)) {
> ret = adis16480_ext_clk_config(st, spi->dev.of_node, true);
> if (ret)
> - return ret;
> + goto error_stop_device;
>
> st->clk_freq = clk_get_rate(st->ext_clk);
> st->clk_freq *= 1000; /* micro */
> @@ -1301,24 +1273,20 @@ static int adis16480_probe(struct spi_device *spi)
> if (ret)
> goto error_clk_disable_unprepare;
>
> - ret = adis16480_initial_setup(indio_dev);
> - if (ret)
> - goto error_cleanup_buffer;
> -
> ret = iio_device_register(indio_dev);
> if (ret)
> - goto error_stop_device;
> + goto error_cleanup_buffer;
>
> adis16480_debugfs_init(indio_dev);
>
> return 0;
>
> -error_stop_device:
> - adis16480_stop_device(indio_dev);
> error_cleanup_buffer:
> adis_cleanup_buffer_and_trigger(&st->adis, indio_dev);
> error_clk_disable_unprepare:
> clk_disable_unprepare(st->ext_clk);
> +error_stop_device:
> + adis16480_stop_device(indio_dev);
> return ret;
> }
>
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