ASoC: pcm512x: Implement paging support

The PCM512x devices use a paged register map covering the entire register
range. Implement support for this, mapping pages in at addresses starting
at 0x100 for ease of use (though since the pages are numbered from 0 there
is going to be an off by one when looking at the first byte as a page
number).

Also mark the new registers as accessible with the exception of the
coefficient RAM which is a bit fiddly and may benefit from some extra
handling to linearise the blocks.

Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 47 insertions, 18 deletions

diff --git a/sound/soc/codecs/pcm512x.c b/sound/soc/codecs/pcm512x.c
index 1150381fc373..cdcb51e4c86f 100644
--- a/sound/soc/codecs/pcm512x.c
+++ b/sound/soc/codecs/pcm512x.c
@@ -66,22 +66,29 @@ PCM512x_REGULATOR_EVENT(1)
 PCM512x_REGULATOR_EVENT(2)
 
 static const struct reg_default pcm512x_reg_defaults[] = {
-	{ PCM512x_RESET,            0x00 },
-	{ PCM512x_POWER,            0x00 },
-	{ PCM512x_MUTE,             0x00 },
-	{ PCM512x_DSP,              0x00 },
-	{ PCM512x_PLL_REF,          0x00 },
-	{ PCM512x_DAC_ROUTING,      0x11 },
-	{ PCM512x_DSP_PROGRAM,      0x01 },
-	{ PCM512x_CLKDET,           0x00 },
-	{ PCM512x_AUTO_MUTE,        0x00 },
-	{ PCM512x_ERROR_DETECT,     0x00 },
-	{ PCM512x_DIGITAL_VOLUME_1, 0x00 },
-	{ PCM512x_DIGITAL_VOLUME_2, 0x30 },
-	{ PCM512x_DIGITAL_VOLUME_3, 0x30 },
-	{ PCM512x_DIGITAL_MUTE_1,   0x22 },
-	{ PCM512x_DIGITAL_MUTE_2,   0x00 },
-	{ PCM512x_DIGITAL_MUTE_3,   0x07 },
+	{ PCM512x_RESET,             0x00 },
+	{ PCM512x_POWER,             0x00 },
+	{ PCM512x_MUTE,              0x00 },
+	{ PCM512x_DSP,               0x00 },
+	{ PCM512x_PLL_REF,           0x00 },
+	{ PCM512x_DAC_ROUTING,       0x11 },
+	{ PCM512x_DSP_PROGRAM,       0x01 },
+	{ PCM512x_CLKDET,            0x00 },
+	{ PCM512x_AUTO_MUTE,         0x00 },
+	{ PCM512x_ERROR_DETECT,      0x00 },
+	{ PCM512x_DIGITAL_VOLUME_1,  0x00 },
+	{ PCM512x_DIGITAL_VOLUME_2,  0x30 },
+	{ PCM512x_DIGITAL_VOLUME_3,  0x30 },
+	{ PCM512x_DIGITAL_MUTE_1,    0x22 },
+	{ PCM512x_DIGITAL_MUTE_2,    0x00 },
+	{ PCM512x_DIGITAL_MUTE_3,    0x07 },
+	{ PCM512x_OUTPUT_AMPLITUDE,  0x00 },
+	{ PCM512x_ANALOG_GAIN_CTRL,  0x00 },
+	{ PCM512x_UNDERVOLTAGE_PROT, 0x00 },
+	{ PCM512x_ANALOG_MUTE_CTRL,  0x00 },
+	{ PCM512x_ANALOG_GAIN_BOOST, 0x00 },
+	{ PCM512x_VCOM_CTRL_1,       0x00 },
+	{ PCM512x_VCOM_CTRL_2,       0x01 },
 };
 
 static bool pcm512x_readable(struct device *dev, unsigned int reg)
@@ -141,9 +148,18 @@ static bool pcm512x_readable(struct device *dev, unsigned int reg)
 	case PCM512x_ANALOG_MUTE_DET:
 	case PCM512x_GPIN:
 	case PCM512x_DIGITAL_MUTE_DET:
+	case PCM512x_OUTPUT_AMPLITUDE:
+	case PCM512x_ANALOG_GAIN_CTRL:
+	case PCM512x_UNDERVOLTAGE_PROT:
+	case PCM512x_ANALOG_MUTE_CTRL:
+	case PCM512x_ANALOG_GAIN_BOOST:
+	case PCM512x_VCOM_CTRL_1:
+	case PCM512x_VCOM_CTRL_2:
+	case PCM512x_CRAM_CTRL:
 		return true;
 	default:
-		return false;
+		/* There are 256 raw register addresses */
+		return reg < 0xff;
 	}
 }
 
@@ -159,9 +175,11 @@ static bool pcm512x_volatile(struct device *dev, unsigned int reg)
 	case PCM512x_ANALOG_MUTE_DET:
 	case PCM512x_GPIN:
 	case PCM512x_DIGITAL_MUTE_DET:
+	case PCM512x_CRAM_CTRL:
 		return true;
 	default:
-		return false;
+		/* There are 256 raw register addresses */
+		return reg < 0xff;
 	}
 }
 
@@ -343,6 +361,14 @@ static struct snd_soc_codec_driver pcm512x_codec_driver = {
 	.num_dapm_routes = ARRAY_SIZE(pcm512x_dapm_routes),
 };
 
+static const struct regmap_range_cfg pcm512x_range = {
+	.name = "Pages", .range_min = PCM512x_VIRT_BASE,
+	.range_max = PCM512x_MAX_REGISTER,
+	.selector_reg = PCM512x_PAGE,
+	.selector_mask = 0xff,
+	.window_start = 0, .window_len = 0x100,
+};
+
 static const struct regmap_config pcm512x_regmap = {
 	.reg_bits = 8,
 	.val_bits = 8,
@@ -350,6 +376,9 @@ static const struct regmap_config pcm512x_regmap = {
 	.readable_reg = pcm512x_readable,
 	.volatile_reg = pcm512x_volatile,
 
+	.ranges = &pcm512x_range,
+	.num_ranges = 1,
+
 	.max_register = PCM512x_MAX_REGISTER,
 	.reg_defaults = pcm512x_reg_defaults,
 	.num_reg_defaults = ARRAY_SIZE(pcm512x_reg_defaults),