All of lore.kernel.org
 help / color / mirror / Atom feed
From: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
To: lars@metafoo.de, Michael.Hennerich@analog.com,
	stefan.popa@analog.com, jic23@kernel.org, knaack.h@gmx.de,
	pmeerw@pmeerw.net, gregkh@linuxfoundation.org
Cc: linux-iio@vger.kernel.org, devel@driverdev.osuosl.org,
	linux-kernel@vger.kernel.org, kernel-usp@googlegroups.com
Subject: [PATCH 3/4] staging: iio: ad9832: use clock framework for clock reference
Date: Mon, 1 Apr 2019 11:37:45 -0300	[thread overview]
Message-ID: <20190401143745.ooxttvazrlqe2lcc@smtp.gmail.com> (raw)

Previously external clock were set through platform_data struct.
Now device uses clk struct defined in include/linux/clk.h to handle
external clock source.
It also removes mclk from platform_data struct.

Signed-off-by: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
---
 drivers/staging/iio/frequency/ad9832.c | 37 +++++++++++++++++---------
 drivers/staging/iio/frequency/ad9832.h |  1 -
 2 files changed, 25 insertions(+), 13 deletions(-)

diff --git a/drivers/staging/iio/frequency/ad9832.c b/drivers/staging/iio/frequency/ad9832.c
index d8d4a7936275..74308a2e72db 100644
--- a/drivers/staging/iio/frequency/ad9832.c
+++ b/drivers/staging/iio/frequency/ad9832.c
@@ -7,6 +7,7 @@
 
 #include <asm/div64.h>
 
+#include <linux/clk.h>
 #include <linux/device.h>
 #include <linux/err.h>
 #include <linux/kernel.h>
@@ -95,7 +96,7 @@ struct ad9832_state {
 	struct spi_device		*spi;
 	struct regulator		*avdd;
 	struct regulator		*dvdd;
-	unsigned long			mclk;
+	struct clk			*mclk;
 	unsigned short			ctrl_fp;
 	unsigned short			ctrl_ss;
 	unsigned short			ctrl_src;
@@ -130,10 +131,10 @@ static int ad9832_write_frequency(struct ad9832_state *st,
 {
 	unsigned long regval;
 
-	if (fout > (st->mclk / 2))
+	if (fout > (clk_get_rate(st->mclk) / 2))
 		return -EINVAL;
 
-	regval = ad9832_calc_freqreg(st->mclk, fout);
+	regval = ad9832_calc_freqreg(clk_get_rate(st->mclk), fout);
 
 	st->freq_data[0] = cpu_to_be16((AD9832_CMD_FRE8BITSW << CMD_SHIFT) |
 					(addr << ADD_SHIFT) |
@@ -334,7 +335,16 @@ static int ad9832_probe(struct spi_device *spi)
 		goto error_disable_avdd;
 	}
 
-	st->mclk = pdata->mclk;
+	st->mclk = devm_clk_get(&spi->dev, "mclk");
+	if (IS_ERR(st->mclk)) {
+		ret = PTR_ERR(st->mclk);
+		goto error_disable_dvdd;
+	}
+
+	ret = clk_prepare_enable(st->mclk);
+	if (ret < 0)
+		goto error_disable_dvdd;
+
 	st->spi = spi;
 	mutex_init(&st->lock);
 
@@ -385,39 +395,41 @@ static int ad9832_probe(struct spi_device *spi)
 	ret = spi_sync(st->spi, &st->msg);
 	if (ret) {
 		dev_err(&spi->dev, "device init failed\n");
-		goto error_disable_dvdd;
+		goto error_unprepare_mclk;
 	}
 
 	ret = ad9832_write_frequency(st, AD9832_FREQ0HM, pdata->freq0);
 	if (ret)
-		goto error_disable_dvdd;
+		goto error_unprepare_mclk;
 
 	ret = ad9832_write_frequency(st, AD9832_FREQ1HM, pdata->freq1);
 	if (ret)
-		goto error_disable_dvdd;
+		goto error_unprepare_mclk;
 
 	ret = ad9832_write_phase(st, AD9832_PHASE0H, pdata->phase0);
 	if (ret)
-		goto error_disable_dvdd;
+		goto error_unprepare_mclk;
 
 	ret = ad9832_write_phase(st, AD9832_PHASE1H, pdata->phase1);
 	if (ret)
-		goto error_disable_dvdd;
+		goto error_unprepare_mclk;
 
 	ret = ad9832_write_phase(st, AD9832_PHASE2H, pdata->phase2);
 	if (ret)
-		goto error_disable_dvdd;
+		goto error_unprepare_mclk;
 
 	ret = ad9832_write_phase(st, AD9832_PHASE3H, pdata->phase3);
 	if (ret)
-		goto error_disable_dvdd;
+		goto error_unprepare_mclk;
 
 	ret = iio_device_register(indio_dev);
 	if (ret)
-		goto error_disable_dvdd;
+		goto error_unprepare_mclk;
 
 	return 0;
 
+error_unprepare_mclk:
+	clk_disable_unprepare(st->mclk);
 error_disable_dvdd:
 	regulator_disable(st->dvdd);
 error_disable_avdd:
@@ -432,6 +444,7 @@ static int ad9832_remove(struct spi_device *spi)
 	struct ad9832_state *st = iio_priv(indio_dev);
 
 	iio_device_unregister(indio_dev);
+	clk_disable_unprepare(st->mclk);
 	regulator_disable(st->dvdd);
 	regulator_disable(st->avdd);
 
diff --git a/drivers/staging/iio/frequency/ad9832.h b/drivers/staging/iio/frequency/ad9832.h
index 39d326cc1af9..032579a2d539 100644
--- a/drivers/staging/iio/frequency/ad9832.h
+++ b/drivers/staging/iio/frequency/ad9832.h
@@ -24,7 +24,6 @@
  */
 
 struct ad9832_platform_data {
-	unsigned long		mclk;
 	unsigned long		freq0;
 	unsigned long		freq1;
 	unsigned short		phase0;
-- 
2.20.1


             reply	other threads:[~2019-04-01 14:37 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-01 14:37 Marcelo Schmitt [this message]
2019-04-07 11:34 ` [PATCH 3/4] staging: iio: ad9832: use clock framework for clock reference Jonathan Cameron

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190401143745.ooxttvazrlqe2lcc@smtp.gmail.com \
    --to=marcelo.schmitt1@gmail.com \
    --cc=Michael.Hennerich@analog.com \
    --cc=devel@driverdev.osuosl.org \
    --cc=gregkh@linuxfoundation.org \
    --cc=jic23@kernel.org \
    --cc=kernel-usp@googlegroups.com \
    --cc=knaack.h@gmx.de \
    --cc=lars@metafoo.de \
    --cc=linux-iio@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=pmeerw@pmeerw.net \
    --cc=stefan.popa@analog.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.