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SubjectRe: [PATCH V5 3/5] iio: adc: Add support for PMIC7 ADC
On Fri, 22 May 2020 19:54:10 +0530
Jishnu Prakash <jprakash@codeaurora.org> wrote:

> The ADC architecture on PMIC7 is changed as compared to PMIC5. The
> major change from PMIC5 is that all SW communication to ADC goes through
> PMK8350, which communicates with other PMICs through PBS when the ADC
> on PMK8350 works in master mode. The SID register is used to identify the
> PMICs with which the PBS needs to communicate. Add support for the same.
>
> Signed-off-by: Jishnu Prakash <jprakash@codeaurora.org>
> ---
> drivers/iio/adc/qcom-spmi-adc5.c | 231 ++++++++++++++++++++++++++++++--
> drivers/iio/adc/qcom-vadc-common.c | 260 +++++++++++++++++++++++++++++++++++++
> drivers/iio/adc/qcom-vadc-common.h | 14 ++
> 3 files changed, 496 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/iio/adc/qcom-spmi-adc5.c b/drivers/iio/adc/qcom-spmi-adc5.c
> index 21fdcde..e1482fd 100644
> --- a/drivers/iio/adc/qcom-spmi-adc5.c
> +++ b/drivers/iio/adc/qcom-spmi-adc5.c
> @@ -1,6 +1,6 @@
> // SPDX-License-Identifier: GPL-2.0
> /*
> - * Copyright (c) 2018, The Linux Foundation. All rights reserved.
> + * Copyright (c) 2018, 2020, The Linux Foundation. All rights reserved.
...
> @@ -110,6 +120,7 @@ struct adc5_channel_prop {
> enum adc5_cal_method cal_method;
> enum adc5_cal_val cal_val;
> unsigned int decimation;
> + unsigned int sid;
> unsigned int prescale;
> unsigned int hw_settle_time;
> unsigned int avg_samples;
> @@ -140,6 +151,7 @@ struct adc5_chip {
> bool poll_eoc;
> struct completion complete;
> struct mutex lock;
> + int irq_eoc;

This is introduced but doesn't seem to be used...

> const struct adc5_data *data;
> };
>
> @@ -155,6 +167,8 @@ static const struct vadc_prescale_ratio adc5_prescale_ratios[] = {
> {.num = 1, .den = 16}
> };
>
...

> static int adc5_prescaling_from_dt(u32 num, u32 den)
> {
> unsigned int pre;
> @@ -285,7 +304,7 @@ static int adc5_configure(struct adc5_chip *adc,
>
> /* Read registers 0x42 through 0x46 */
> ret = adc5_read(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));
> - if (ret < 0)
> + if (ret)
> return ret;

As Andy mentioned, this is better in a separate patch. It's just adding
noise to this patch which is actually doing things...

>
> /* Digital param selection */
> @@ -314,6 +333,47 @@ static int adc5_configure(struct adc5_chip *adc,
> return adc5_write(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));
> }
>

Thanks,

Jonathan

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