[alsa-devel] Applied "ASoC: adau: Factor out shared PLL configuration code" to the asoc tree
Mark Brown
broonie at kernel.org
Thu Jun 9 19:42:30 CEST 2016
The patch
ASoC: adau: Factor out shared PLL configuration code
has been applied to the asoc tree at
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying
to this mail.
Thanks,
Mark
>From 0eadaa9ce2aacdcc3cf050d98c25aacabadc557f Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars at metafoo.de>
Date: Thu, 9 Jun 2016 19:39:06 +0200
Subject: [PATCH] ASoC: adau: Factor out shared PLL configuration code
Multiple devices from the ADAU family share the same PLL structure and
configuration register layout. Introduce a new helper module that can be
used to calculated the PLL configuration registers based on a specified
input frequency and the desired output frequency of the PLL.
The ADAU1761/ADAU1781 and ADAU1373 drivers are updated to make use of this
new helper module. But future drivers for additional devices from the ADAU
family are also expected to make use of it.
In anticipation of sharing more infrastructure code between different
devices from the ADAU family the new module is called adau-utils.
Signed-off-by: Lars-Peter Clausen <lars at metafoo.de>
Signed-off-by: Mark Brown <broonie at kernel.org>
---
sound/soc/codecs/Kconfig | 5 ++++
sound/soc/codecs/Makefile | 2 ++
sound/soc/codecs/adau-utils.c | 61 +++++++++++++++++++++++++++++++++++++++++++
sound/soc/codecs/adau-utils.h | 7 +++++
sound/soc/codecs/adau1373.c | 38 +++++++--------------------
sound/soc/codecs/adau17x1.c | 38 +++------------------------
6 files changed, 89 insertions(+), 62 deletions(-)
create mode 100644 sound/soc/codecs/adau-utils.c
create mode 100644 sound/soc/codecs/adau-utils.h
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 4d82a58ff6b0..3e215395a199 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -269,8 +269,12 @@ config SND_SOC_AD1980
config SND_SOC_AD73311
tristate
+config SND_SOC_ADAU_UTILS
+ tristate
+
config SND_SOC_ADAU1373
tristate
+ select SND_SOC_ADAU_UTILS
config SND_SOC_ADAU1701
tristate "Analog Devices ADAU1701 CODEC"
@@ -280,6 +284,7 @@ config SND_SOC_ADAU1701
config SND_SOC_ADAU17X1
tristate
select SND_SOC_SIGMADSP_REGMAP
+ select SND_SOC_ADAU_UTILS
config SND_SOC_ADAU1761
tristate
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 0f548fd34ca3..d61957f2618c 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -7,6 +7,7 @@ snd-soc-ad193x-spi-objs := ad193x-spi.o
snd-soc-ad193x-i2c-objs := ad193x-i2c.o
snd-soc-ad1980-objs := ad1980.o
snd-soc-ad73311-objs := ad73311.o
+snd-soc-adau-utils-objs := adau-utils.o
snd-soc-adau1373-objs := adau1373.o
snd-soc-adau1701-objs := adau1701.o
snd-soc-adau17x1-objs := adau17x1.o
@@ -220,6 +221,7 @@ obj-$(CONFIG_SND_SOC_AD193X_SPI) += snd-soc-ad193x-spi.o
obj-$(CONFIG_SND_SOC_AD193X_I2C) += snd-soc-ad193x-i2c.o
obj-$(CONFIG_SND_SOC_AD1980) += snd-soc-ad1980.o
obj-$(CONFIG_SND_SOC_AD73311) += snd-soc-ad73311.o
+obj-$(CONFIG_SND_SOC_ADAU_UTILS) += snd-soc-adau-utils.o
obj-$(CONFIG_SND_SOC_ADAU1373) += snd-soc-adau1373.o
obj-$(CONFIG_SND_SOC_ADAU1701) += snd-soc-adau1701.o
obj-$(CONFIG_SND_SOC_ADAU17X1) += snd-soc-adau17x1.o
diff --git a/sound/soc/codecs/adau-utils.c b/sound/soc/codecs/adau-utils.c
new file mode 100644
index 000000000000..19d6a6f41b12
--- /dev/null
+++ b/sound/soc/codecs/adau-utils.c
@@ -0,0 +1,61 @@
+/*
+ * Shared helper functions for devices from the ADAU family
+ *
+ * Copyright 2011-2016 Analog Devices Inc.
+ * Author: Lars-Peter Clausen <lars at metafoo.de>
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/gcd.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include "adau-utils.h"
+
+int adau_calc_pll_cfg(unsigned int freq_in, unsigned int freq_out,
+ uint8_t regs[5])
+{
+ unsigned int r, n, m, i, j;
+ unsigned int div;
+
+ if (!freq_out) {
+ r = 0;
+ n = 0;
+ m = 0;
+ div = 0;
+ } else {
+ if (freq_out % freq_in != 0) {
+ div = DIV_ROUND_UP(freq_in, 13500000);
+ freq_in /= div;
+ r = freq_out / freq_in;
+ i = freq_out % freq_in;
+ j = gcd(i, freq_in);
+ n = i / j;
+ m = freq_in / j;
+ div--;
+ } else {
+ r = freq_out / freq_in;
+ n = 0;
+ m = 0;
+ div = 0;
+ }
+ if (n > 0xffff || m > 0xffff || div > 3 || r > 8 || r < 2)
+ return -EINVAL;
+ }
+
+ regs[0] = m >> 8;
+ regs[1] = m & 0xff;
+ regs[2] = n >> 8;
+ regs[3] = n & 0xff;
+ regs[4] = (r << 3) | (div << 1);
+ if (m != 0)
+ regs[4] |= 1; /* Fractional mode */
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(adau_calc_pll_cfg);
+
+MODULE_DESCRIPTION("ASoC ADAU audio CODECs shared helper functions");
+MODULE_AUTHOR("Lars-Peter Clausen <lars at metafoo.de>");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/codecs/adau-utils.h b/sound/soc/codecs/adau-utils.h
new file mode 100644
index 000000000000..939b5f37762f
--- /dev/null
+++ b/sound/soc/codecs/adau-utils.h
@@ -0,0 +1,7 @@
+#ifndef SOUND_SOC_CODECS_ADAU_PLL_H
+#define SOUND_SOC_CODECS_ADAU_PLL_H
+
+int adau_calc_pll_cfg(unsigned int freq_in, unsigned int freq_out,
+ uint8_t regs[5]);
+
+#endif
diff --git a/sound/soc/codecs/adau1373.c b/sound/soc/codecs/adau1373.c
index fe1353a797b9..1556b360fa15 100644
--- a/sound/soc/codecs/adau1373.c
+++ b/sound/soc/codecs/adau1373.c
@@ -23,6 +23,7 @@
#include <sound/adau1373.h>
#include "adau1373.h"
+#include "adau-utils.h"
struct adau1373_dai {
unsigned int clk_src;
@@ -1254,7 +1255,8 @@ static int adau1373_set_pll(struct snd_soc_codec *codec, int pll_id,
{
struct adau1373 *adau1373 = snd_soc_codec_get_drvdata(codec);
unsigned int dpll_div = 0;
- unsigned int x, r, n, m, i, j, mode;
+ uint8_t pll_regs[5];
+ int ret;
switch (pll_id) {
case ADAU1373_PLL1:
@@ -1295,27 +1297,8 @@ static int adau1373_set_pll(struct snd_soc_codec *codec, int pll_id,
dpll_div++;
}
- if (freq_out % freq_in != 0) {
- /* fout = fin * (r + (n/m)) / x */
- x = DIV_ROUND_UP(freq_in, 13500000);
- freq_in /= x;
- r = freq_out / freq_in;
- i = freq_out % freq_in;
- j = gcd(i, freq_in);
- n = i / j;
- m = freq_in / j;
- x--;
- mode = 1;
- } else {
- /* fout = fin / r */
- r = freq_out / freq_in;
- n = 0;
- m = 0;
- x = 0;
- mode = 0;
- }
-
- if (r < 2 || r > 8 || x > 3 || m > 0xffff || n > 0xffff)
+ ret = adau_calc_pll_cfg(freq_in, freq_out, pll_regs);
+ if (ret)
return -EINVAL;
if (dpll_div) {
@@ -1330,12 +1313,11 @@ static int adau1373_set_pll(struct snd_soc_codec *codec, int pll_id,
regmap_write(adau1373->regmap, ADAU1373_DPLL_CTRL(pll_id),
(source << 4) | dpll_div);
- regmap_write(adau1373->regmap, ADAU1373_PLL_CTRL1(pll_id), (m >> 8) & 0xff);
- regmap_write(adau1373->regmap, ADAU1373_PLL_CTRL2(pll_id), m & 0xff);
- regmap_write(adau1373->regmap, ADAU1373_PLL_CTRL3(pll_id), (n >> 8) & 0xff);
- regmap_write(adau1373->regmap, ADAU1373_PLL_CTRL4(pll_id), n & 0xff);
- regmap_write(adau1373->regmap, ADAU1373_PLL_CTRL5(pll_id),
- (r << 3) | (x << 1) | mode);
+ regmap_write(adau1373->regmap, ADAU1373_PLL_CTRL1(pll_id), pll_regs[0]);
+ regmap_write(adau1373->regmap, ADAU1373_PLL_CTRL2(pll_id), pll_regs[1]);
+ regmap_write(adau1373->regmap, ADAU1373_PLL_CTRL3(pll_id), pll_regs[2]);
+ regmap_write(adau1373->regmap, ADAU1373_PLL_CTRL4(pll_id), pll_regs[3]);
+ regmap_write(adau1373->regmap, ADAU1373_PLL_CTRL5(pll_id), pll_regs[4]);
/* Set sysclk to pll_rate / 4 */
regmap_update_bits(adau1373->regmap, ADAU1373_CLK_SRC_DIV(pll_id), 0x3f, 0x09);
diff --git a/sound/soc/codecs/adau17x1.c b/sound/soc/codecs/adau17x1.c
index fcf05b254ecd..66a6e061923d 100644
--- a/sound/soc/codecs/adau17x1.c
+++ b/sound/soc/codecs/adau17x1.c
@@ -23,6 +23,7 @@
#include "sigmadsp.h"
#include "adau17x1.h"
+#include "adau-utils.h"
static const char * const adau17x1_capture_mixer_boost_text[] = {
"Normal operation", "Boost Level 1", "Boost Level 2", "Boost Level 3",
@@ -391,45 +392,14 @@ static int adau17x1_set_dai_pll(struct snd_soc_dai *dai, int pll_id,
{
struct snd_soc_codec *codec = dai->codec;
struct adau *adau = snd_soc_codec_get_drvdata(codec);
- unsigned int r, n, m, i, j;
- unsigned int div;
int ret;
if (freq_in < 8000000 || freq_in > 27000000)
return -EINVAL;
- if (!freq_out) {
- r = 0;
- n = 0;
- m = 0;
- div = 0;
- } else {
- if (freq_out % freq_in != 0) {
- div = DIV_ROUND_UP(freq_in, 13500000);
- freq_in /= div;
- r = freq_out / freq_in;
- i = freq_out % freq_in;
- j = gcd(i, freq_in);
- n = i / j;
- m = freq_in / j;
- div--;
- } else {
- r = freq_out / freq_in;
- n = 0;
- m = 0;
- div = 0;
- }
- if (n > 0xffff || m > 0xffff || div > 3 || r > 8 || r < 2)
- return -EINVAL;
- }
-
- adau->pll_regs[0] = m >> 8;
- adau->pll_regs[1] = m & 0xff;
- adau->pll_regs[2] = n >> 8;
- adau->pll_regs[3] = n & 0xff;
- adau->pll_regs[4] = (r << 3) | (div << 1);
- if (m != 0)
- adau->pll_regs[4] |= 1; /* Fractional mode */
+ ret = adau_calc_pll_cfg(freq_in, freq_out, adau->pll_regs);
+ if (ret < 0)
+ return ret;
/* The PLL register is 6 bytes long and can only be written at once. */
ret = regmap_raw_write(adau->regmap, ADAU17X1_PLL_CONTROL,
--
2.8.1
More information about the Alsa-devel
mailing list