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Message-Id: <20241003-wip-bl-ad3552r-axi-v0-iio-testing-v4-1-ceb157487329@baylibre.com>
Date: Thu, 03 Oct 2024 19:28:58 +0200
From: Angelo Dureghello <adureghello@...libre.com>
To: Lars-Peter Clausen <lars@...afoo.de>,
Michael Hennerich <Michael.Hennerich@...log.com>,
Nuno Sa <nuno.sa@...log.com>, Jonathan Cameron <jic23@...nel.org>,
Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Mihail Chindris <mihail.chindris@...log.com>,
Olivier Moysan <olivier.moysan@...s.st.com>
Cc: linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
Jonathan Cameron <Jonathan.Cameron@...wei.com>, devicetree@...r.kernel.org,
dlechner@...libre.com, Mark Brown <broonie@...nel.org>,
Angelo Dureghello <adureghello@...libre.com>
Subject: [PATCH v4 01/11] iio: dac: adi-axi-dac: update register names
From: Angelo Dureghello <adureghello@...libre.com>
Non functional, readability change.
Update register names so that register bitfields can be more easily
linked to the register name.
Signed-off-by: Angelo Dureghello <adureghello@...libre.com>
---
drivers/iio/dac/adi-axi-dac.c | 137 +++++++++++++++++++++++-------------------
1 file changed, 74 insertions(+), 63 deletions(-)
diff --git a/drivers/iio/dac/adi-axi-dac.c b/drivers/iio/dac/adi-axi-dac.c
index 0cb00f3bec04..e83f70465b46 100644
--- a/drivers/iio/dac/adi-axi-dac.c
+++ b/drivers/iio/dac/adi-axi-dac.c
@@ -35,35 +35,37 @@
*/
/* Base controls */
-#define AXI_DAC_REG_CONFIG 0x0c
-#define AXI_DDS_DISABLE BIT(6)
+#define AXI_DAC_CONFIG_REG 0x0c
+#define AXI_DAC_CONFIG_DDS_DISABLE BIT(6)
/* DAC controls */
-#define AXI_DAC_REG_RSTN 0x0040
-#define AXI_DAC_RSTN_CE_N BIT(2)
-#define AXI_DAC_RSTN_MMCM_RSTN BIT(1)
-#define AXI_DAC_RSTN_RSTN BIT(0)
-#define AXI_DAC_REG_CNTRL_1 0x0044
-#define AXI_DAC_SYNC BIT(0)
-#define AXI_DAC_REG_CNTRL_2 0x0048
-#define ADI_DAC_R1_MODE BIT(4)
-#define AXI_DAC_DRP_STATUS 0x0074
-#define AXI_DAC_DRP_LOCKED BIT(17)
+#define AXI_DAC_RSTN_REG 0x0040
+#define AXI_DAC_RSTN_CE_N BIT(2)
+#define AXI_DAC_RSTN_MMCM_RSTN BIT(1)
+#define AXI_DAC_RSTN_RSTN BIT(0)
+#define AXI_DAC_CNTRL_1_REG 0x0044
+#define AXI_DAC_CNTRL_1_SYNC BIT(0)
+#define AXI_DAC_CNTRL_2_REG 0x0048
+#define ADI_DAC_CNTRL_2_R1_MODE BIT(4)
+#define AXI_DAC_DRP_STATUS_REG 0x0074
+#define AXI_DAC_DRP_STATUS_DRP_LOCKED BIT(17)
+
/* DAC Channel controls */
-#define AXI_DAC_REG_CHAN_CNTRL_1(c) (0x0400 + (c) * 0x40)
-#define AXI_DAC_REG_CHAN_CNTRL_3(c) (0x0408 + (c) * 0x40)
-#define AXI_DAC_SCALE_SIGN BIT(15)
-#define AXI_DAC_SCALE_INT BIT(14)
-#define AXI_DAC_SCALE GENMASK(14, 0)
-#define AXI_DAC_REG_CHAN_CNTRL_2(c) (0x0404 + (c) * 0x40)
-#define AXI_DAC_REG_CHAN_CNTRL_4(c) (0x040c + (c) * 0x40)
-#define AXI_DAC_PHASE GENMASK(31, 16)
-#define AXI_DAC_FREQUENCY GENMASK(15, 0)
-#define AXI_DAC_REG_CHAN_CNTRL_7(c) (0x0418 + (c) * 0x40)
-#define AXI_DAC_DATA_SEL GENMASK(3, 0)
+#define AXI_DAC_CHAN_CNTRL_1_REG(c) (0x0400 + (c) * 0x40)
+#define AXI_DAC_CHAN_CNTRL_3_REG(c) (0x0408 + (c) * 0x40)
+#define AXI_DAC_CHAN_CNTRL_3_SCALE_SIGN BIT(15)
+#define AXI_DAC_CHAN_CNTRL_3_SCALE_INT BIT(14)
+#define AXI_DAC_CHAN_CNTRL_3_SCALE GENMASK(14, 0)
+#define AXI_DAC_CHAN_CNTRL_2_REG(c) (0x0404 + (c) * 0x40)
+#define AXI_DAC_CHAN_CNTRL_2_PHASE GENMASK(31, 16)
+#define AXI_DAC_CHAN_CNTRL_2_FREQUENCY GENMASK(15, 0)
+#define AXI_DAC_CHAN_CNTRL_4_REG(c) (0x040c + (c) * 0x40)
+#define AXI_DAC_CHAN_CNTRL_7_REG(c) (0x0418 + (c) * 0x40)
+#define AXI_DAC_CHAN_CNTRL_7_DATA_SEL GENMASK(3, 0)
/* 360 degrees in rad */
-#define AXI_DAC_2_PI_MEGA 6283190
+#define AXI_DAC_2_PI_MEGA 6283190
+
enum {
AXI_DAC_DATA_INTERNAL_TONE,
AXI_DAC_DATA_DMA = 2,
@@ -89,7 +91,7 @@ static int axi_dac_enable(struct iio_backend *back)
int ret;
guard(mutex)(&st->lock);
- ret = regmap_set_bits(st->regmap, AXI_DAC_REG_RSTN,
+ ret = regmap_set_bits(st->regmap, AXI_DAC_RSTN_REG,
AXI_DAC_RSTN_MMCM_RSTN);
if (ret)
return ret;
@@ -98,12 +100,14 @@ static int axi_dac_enable(struct iio_backend *back)
* designs really use it but if they don't we still get the lock bit
* set. So let's do it all the time so the code is generic.
*/
- ret = regmap_read_poll_timeout(st->regmap, AXI_DAC_DRP_STATUS, __val,
- __val & AXI_DAC_DRP_LOCKED, 100, 1000);
+ ret = regmap_read_poll_timeout(st->regmap, AXI_DAC_DRP_STATUS_REG,
+ __val,
+ __val & AXI_DAC_DRP_STATUS_DRP_LOCKED,
+ 100, 1000);
if (ret)
return ret;
- return regmap_set_bits(st->regmap, AXI_DAC_REG_RSTN,
+ return regmap_set_bits(st->regmap, AXI_DAC_RSTN_REG,
AXI_DAC_RSTN_RSTN | AXI_DAC_RSTN_MMCM_RSTN);
}
@@ -112,7 +116,7 @@ static void axi_dac_disable(struct iio_backend *back)
struct axi_dac_state *st = iio_backend_get_priv(back);
guard(mutex)(&st->lock);
- regmap_write(st->regmap, AXI_DAC_REG_RSTN, 0);
+ regmap_write(st->regmap, AXI_DAC_RSTN_REG, 0);
}
static struct iio_buffer *axi_dac_request_buffer(struct iio_backend *back,
@@ -155,15 +159,15 @@ static int __axi_dac_frequency_get(struct axi_dac_state *st, unsigned int chan,
}
if (tone_2)
- reg = AXI_DAC_REG_CHAN_CNTRL_4(chan);
+ reg = AXI_DAC_CHAN_CNTRL_4_REG(chan);
else
- reg = AXI_DAC_REG_CHAN_CNTRL_2(chan);
+ reg = AXI_DAC_CHAN_CNTRL_2_REG(chan);
ret = regmap_read(st->regmap, reg, &raw);
if (ret)
return ret;
- raw = FIELD_GET(AXI_DAC_FREQUENCY, raw);
+ raw = FIELD_GET(AXI_DAC_CHAN_CNTRL_2_FREQUENCY, raw);
*freq = DIV_ROUND_CLOSEST_ULL(raw * st->dac_clk, BIT(16));
return 0;
@@ -194,17 +198,18 @@ static int axi_dac_scale_get(struct axi_dac_state *st,
u32 reg, raw;
if (tone_2)
- reg = AXI_DAC_REG_CHAN_CNTRL_3(chan->channel);
+ reg = AXI_DAC_CHAN_CNTRL_3_REG(chan->channel);
else
- reg = AXI_DAC_REG_CHAN_CNTRL_1(chan->channel);
+ reg = AXI_DAC_CHAN_CNTRL_1_REG(chan->channel);
ret = regmap_read(st->regmap, reg, &raw);
if (ret)
return ret;
- sign = FIELD_GET(AXI_DAC_SCALE_SIGN, raw);
- raw = FIELD_GET(AXI_DAC_SCALE, raw);
- scale = DIV_ROUND_CLOSEST_ULL((u64)raw * MEGA, AXI_DAC_SCALE_INT);
+ sign = FIELD_GET(AXI_DAC_CHAN_CNTRL_3_SCALE_SIGN, raw);
+ raw = FIELD_GET(AXI_DAC_CHAN_CNTRL_3_SCALE, raw);
+ scale = DIV_ROUND_CLOSEST_ULL((u64)raw * MEGA,
+ AXI_DAC_CHAN_CNTRL_3_SCALE_INT);
vals[0] = scale / MEGA;
vals[1] = scale % MEGA;
@@ -227,15 +232,15 @@ static int axi_dac_phase_get(struct axi_dac_state *st,
int ret, vals[2];
if (tone_2)
- reg = AXI_DAC_REG_CHAN_CNTRL_4(chan->channel);
+ reg = AXI_DAC_CHAN_CNTRL_4_REG(chan->channel);
else
- reg = AXI_DAC_REG_CHAN_CNTRL_2(chan->channel);
+ reg = AXI_DAC_CHAN_CNTRL_2_REG(chan->channel);
ret = regmap_read(st->regmap, reg, &raw);
if (ret)
return ret;
- raw = FIELD_GET(AXI_DAC_PHASE, raw);
+ raw = FIELD_GET(AXI_DAC_CHAN_CNTRL_2_PHASE, raw);
phase = DIV_ROUND_CLOSEST_ULL((u64)raw * AXI_DAC_2_PI_MEGA, U16_MAX);
vals[0] = phase / MEGA;
@@ -260,18 +265,20 @@ static int __axi_dac_frequency_set(struct axi_dac_state *st, unsigned int chan,
}
if (tone_2)
- reg = AXI_DAC_REG_CHAN_CNTRL_4(chan);
+ reg = AXI_DAC_CHAN_CNTRL_4_REG(chan);
else
- reg = AXI_DAC_REG_CHAN_CNTRL_2(chan);
+ reg = AXI_DAC_CHAN_CNTRL_2_REG(chan);
raw = DIV64_U64_ROUND_CLOSEST((u64)freq * BIT(16), sample_rate);
- ret = regmap_update_bits(st->regmap, reg, AXI_DAC_FREQUENCY, raw);
+ ret = regmap_update_bits(st->regmap, reg,
+ AXI_DAC_CHAN_CNTRL_2_FREQUENCY, raw);
if (ret)
return ret;
/* synchronize channels */
- return regmap_set_bits(st->regmap, AXI_DAC_REG_CNTRL_1, AXI_DAC_SYNC);
+ return regmap_set_bits(st->regmap, AXI_DAC_CNTRL_1_REG,
+ AXI_DAC_CNTRL_1_SYNC);
}
static int axi_dac_frequency_set(struct axi_dac_state *st,
@@ -312,16 +319,16 @@ static int axi_dac_scale_set(struct axi_dac_state *st,
/* format is 1.1.14 (sign, integer and fractional bits) */
if (scale < 0) {
- raw = FIELD_PREP(AXI_DAC_SCALE_SIGN, 1);
+ raw = FIELD_PREP(AXI_DAC_CHAN_CNTRL_3_SCALE_SIGN, 1);
scale *= -1;
}
- raw |= div_u64((u64)scale * AXI_DAC_SCALE_INT, MEGA);
+ raw |= div_u64((u64)scale * AXI_DAC_CHAN_CNTRL_3_SCALE_INT, MEGA);
if (tone_2)
- reg = AXI_DAC_REG_CHAN_CNTRL_3(chan->channel);
+ reg = AXI_DAC_CHAN_CNTRL_3_REG(chan->channel);
else
- reg = AXI_DAC_REG_CHAN_CNTRL_1(chan->channel);
+ reg = AXI_DAC_CHAN_CNTRL_1_REG(chan->channel);
guard(mutex)(&st->lock);
ret = regmap_write(st->regmap, reg, raw);
@@ -329,7 +336,8 @@ static int axi_dac_scale_set(struct axi_dac_state *st,
return ret;
/* synchronize channels */
- ret = regmap_set_bits(st->regmap, AXI_DAC_REG_CNTRL_1, AXI_DAC_SYNC);
+ ret = regmap_set_bits(st->regmap, AXI_DAC_CNTRL_1_REG,
+ AXI_DAC_CNTRL_1_SYNC);
if (ret)
return ret;
@@ -355,18 +363,19 @@ static int axi_dac_phase_set(struct axi_dac_state *st,
raw = DIV_ROUND_CLOSEST_ULL((u64)phase * U16_MAX, AXI_DAC_2_PI_MEGA);
if (tone_2)
- reg = AXI_DAC_REG_CHAN_CNTRL_4(chan->channel);
+ reg = AXI_DAC_CHAN_CNTRL_4_REG(chan->channel);
else
- reg = AXI_DAC_REG_CHAN_CNTRL_2(chan->channel);
+ reg = AXI_DAC_CHAN_CNTRL_2_REG(chan->channel);
guard(mutex)(&st->lock);
- ret = regmap_update_bits(st->regmap, reg, AXI_DAC_PHASE,
- FIELD_PREP(AXI_DAC_PHASE, raw));
+ ret = regmap_update_bits(st->regmap, reg, AXI_DAC_CHAN_CNTRL_2_PHASE,
+ FIELD_PREP(AXI_DAC_CHAN_CNTRL_2_PHASE, raw));
if (ret)
return ret;
/* synchronize channels */
- ret = regmap_set_bits(st->regmap, AXI_DAC_REG_CNTRL_1, AXI_DAC_SYNC);
+ ret = regmap_set_bits(st->regmap, AXI_DAC_CNTRL_1_REG,
+ AXI_DAC_CNTRL_1_SYNC);
if (ret)
return ret;
@@ -437,7 +446,7 @@ static int axi_dac_extend_chan(struct iio_backend *back,
if (chan->type != IIO_ALTVOLTAGE)
return -EINVAL;
- if (st->reg_config & AXI_DDS_DISABLE)
+ if (st->reg_config & AXI_DAC_CONFIG_DDS_DISABLE)
/* nothing to extend */
return 0;
@@ -454,13 +463,14 @@ static int axi_dac_data_source_set(struct iio_backend *back, unsigned int chan,
switch (data) {
case IIO_BACKEND_INTERNAL_CONTINUOUS_WAVE:
return regmap_update_bits(st->regmap,
- AXI_DAC_REG_CHAN_CNTRL_7(chan),
- AXI_DAC_DATA_SEL,
+ AXI_DAC_CHAN_CNTRL_7_REG(chan),
+ AXI_DAC_CHAN_CNTRL_7_DATA_SEL,
AXI_DAC_DATA_INTERNAL_TONE);
case IIO_BACKEND_EXTERNAL:
return regmap_update_bits(st->regmap,
- AXI_DAC_REG_CHAN_CNTRL_7(chan),
- AXI_DAC_DATA_SEL, AXI_DAC_DATA_DMA);
+ AXI_DAC_CHAN_CNTRL_7_REG(chan),
+ AXI_DAC_CHAN_CNTRL_7_DATA_SEL,
+ AXI_DAC_DATA_DMA);
default:
return -EINVAL;
}
@@ -475,7 +485,7 @@ static int axi_dac_set_sample_rate(struct iio_backend *back, unsigned int chan,
if (!sample_rate)
return -EINVAL;
- if (st->reg_config & AXI_DDS_DISABLE)
+ if (st->reg_config & AXI_DAC_CONFIG_DDS_DISABLE)
/* sample_rate has no meaning if DDS is disabled */
return 0;
@@ -580,7 +590,7 @@ static int axi_dac_probe(struct platform_device *pdev)
* Force disable the core. Up to the frontend to enable us. And we can
* still read/write registers...
*/
- ret = regmap_write(st->regmap, AXI_DAC_REG_RSTN, 0);
+ ret = regmap_write(st->regmap, AXI_DAC_RSTN_REG, 0);
if (ret)
return ret;
@@ -601,7 +611,7 @@ static int axi_dac_probe(struct platform_device *pdev)
}
/* Let's get the core read only configuration */
- ret = regmap_read(st->regmap, AXI_DAC_REG_CONFIG, &st->reg_config);
+ ret = regmap_read(st->regmap, AXI_DAC_CONFIG_REG, &st->reg_config);
if (ret)
return ret;
@@ -613,7 +623,8 @@ static int axi_dac_probe(struct platform_device *pdev)
* want independent channels let's override the core's default value and
* set the R1_MODE bit.
*/
- ret = regmap_set_bits(st->regmap, AXI_DAC_REG_CNTRL_2, ADI_DAC_R1_MODE);
+ ret = regmap_set_bits(st->regmap, AXI_DAC_CNTRL_2_REG,
+ ADI_DAC_CNTRL_2_R1_MODE);
if (ret)
return ret;
--
2.45.0.rc1
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