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Thu, 6 Dec 2018 08:38:39 -0500 From: Mircea Caprioru To: CC: , , , , , , , , Stefan Popa , "Mircea Caprioru" Subject: [PATCH] iio:dac:ad5686: Add AD5310R support Date: Thu, 6 Dec 2018 15:38:30 +0200 Message-ID: <20181206133830.20488-1-mircea.caprioru@analog.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-ADIRoutedOnPrem: True X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-Forefront-Antispam-Report: CIP:137.71.25.55;IPV:NLI;CTRY:US;EFV:NLI;SFV:NSPM;SFS:(10009020)(346002)(396003)(376002)(39860400002)(136003)(2980300002)(189003)(199004)(2906002)(246002)(6306002)(14444005)(478600001)(53416004)(7696005)(72206003)(86362001)(8676002)(6346003)(106466001)(26005)(107886003)(2351001)(77096007)(5660300001)(186003)(7636002)(47776003)(316002)(54906003)(1076002)(966005)(4326008)(50466002)(44832011)(6916009)(51416003)(305945005)(486006)(48376002)(6666004)(356004)(426003)(16586007)(50226002)(2616005)(8936002)(36756003)(336012)(106002)(476003)(126002);DIR:OUT;SFP:1101;SCL:1;SRVR:BL2PR03MB546;H:nwd2mta1.analog.com;FPR:;SPF:Pass;LANG:en;PTR:nwd2mail10.analog.com;MX:1;A:1; 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The device has a built-in 2.5V reference which is enabled by default. Another important difference is that the SPI write command operation is 16 bits long. The first four bits represent the command, while the remaining 12 bits are for data. In the control reg, DB9 and DB10 are used for power-down modes, while DB8 is the REF bit. In order to accommodate this change, a new regmap type was defined and checked accordingly. Because AD5310R does not have a readback register, the read_raw operation will return "Operation is not supported". Datasheet: Link: http://www.analog.com/media/en/technical-documentation/data-sheets/AD5310R_5311R.pdf Signed-off-by: Stefan Popa Signed-off-by: Mircea Caprioru --- drivers/iio/dac/ad5686-spi.c | 21 ++++++++++++++++++--- drivers/iio/dac/ad5686.c | 16 ++++++++++++++++ drivers/iio/dac/ad5686.h | 7 +++++++ 3 files changed, 41 insertions(+), 3 deletions(-) diff --git a/drivers/iio/dac/ad5686-spi.c b/drivers/iio/dac/ad5686-spi.c index 1df9143f55e9..665fa6bd9ced 100644 --- a/drivers/iio/dac/ad5686-spi.c +++ b/drivers/iio/dac/ad5686-spi.c @@ -19,6 +19,12 @@ static int ad5686_spi_write(struct ad5686_state *st, u8 tx_len, *buf; switch (st->chip_info->regmap_type) { + case AD5310_REGMAP: + st->data[0].d16 = cpu_to_be16(AD5310_CMD(cmd) | + val); + buf = &st->data[0].d8[0]; + tx_len = 2; + break; case AD5683_REGMAP: st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | AD5683_DATA(val)); @@ -56,10 +62,18 @@ static int ad5686_spi_read(struct ad5686_state *st, u8 addr) u8 cmd = 0; int ret; - if (st->chip_info->regmap_type == AD5686_REGMAP) - cmd = AD5686_CMD_READBACK_ENABLE; - else if (st->chip_info->regmap_type == AD5683_REGMAP) + switch (st->chip_info->regmap_type) { + case AD5310_REGMAP: + return -ENOTSUPP; + case AD5683_REGMAP: cmd = AD5686_CMD_READBACK_ENABLE_V2; + break; + case AD5686_REGMAP: + cmd = AD5686_CMD_READBACK_ENABLE; + break; + default: + return -EINVAL; + } st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | AD5686_ADDR(addr)); @@ -86,6 +100,7 @@ static int ad5686_spi_remove(struct spi_device *spi) } static const struct spi_device_id ad5686_spi_id[] = { + {"ad5310r", ID_AD5310R}, {"ad5672r", ID_AD5672R}, {"ad5676", ID_AD5676}, {"ad5676r", ID_AD5676R}, diff --git a/drivers/iio/dac/ad5686.c b/drivers/iio/dac/ad5686.c index 0e134b13967a..54ff76b93366 100644 --- a/drivers/iio/dac/ad5686.c +++ b/drivers/iio/dac/ad5686.c @@ -83,6 +83,10 @@ static ssize_t ad5686_write_dac_powerdown(struct iio_dev *indio_dev, st->pwr_down_mask &= ~(0x3 << (chan->channel * 2)); switch (st->chip_info->regmap_type) { + case AD5310_REGMAP: + shift = 9; + ref_bit_msk = AD5310_REF_BIT_MSK; + break; case AD5683_REGMAP: shift = 13; ref_bit_msk = AD5683_REF_BIT_MSK; @@ -221,6 +225,7 @@ static struct iio_chan_spec name[] = { \ AD5868_CHANNEL(7, 7, bits, _shift), \ } +DECLARE_AD5693_CHANNELS(ad5310r_channels, 10, 2); DECLARE_AD5693_CHANNELS(ad5311r_channels, 10, 6); DECLARE_AD5676_CHANNELS(ad5672_channels, 12, 4); DECLARE_AD5676_CHANNELS(ad5676_channels, 16, 0); @@ -232,6 +237,12 @@ DECLARE_AD5693_CHANNELS(ad5692r_channels, 14, 2); DECLARE_AD5693_CHANNELS(ad5691r_channels, 12, 4); static const struct ad5686_chip_info ad5686_chip_info_tbl[] = { + [ID_AD5310R] = { + .channels = ad5310r_channels, + .int_vref_mv = 2500, + .num_channels = 1, + .regmap_type = AD5310_REGMAP, + }, [ID_AD5311R] = { .channels = ad5311r_channels, .int_vref_mv = 2500, @@ -419,6 +430,11 @@ int ad5686_probe(struct device *dev, indio_dev->num_channels = st->chip_info->num_channels; switch (st->chip_info->regmap_type) { + case AD5310_REGMAP: + cmd = AD5686_CMD_CONTROL_REG; + ref_bit_msk = AD5310_REF_BIT_MSK; + st->use_internal_vref = !voltage_uv; + break; case AD5683_REGMAP: cmd = AD5686_CMD_CONTROL_REG; ref_bit_msk = AD5683_REF_BIT_MSK; diff --git a/drivers/iio/dac/ad5686.h b/drivers/iio/dac/ad5686.h index 57b3c61bfb91..19f6917d4738 100644 --- a/drivers/iio/dac/ad5686.h +++ b/drivers/iio/dac/ad5686.h @@ -13,7 +13,10 @@ #include #include +#define AD5310_CMD(x) ((x) << 12) + #define AD5683_DATA(x) ((x) << 4) + #define AD5686_ADDR(x) ((x) << 16) #define AD5686_CMD(x) ((x) << 20) @@ -38,6 +41,8 @@ #define AD5686_CMD_CONTROL_REG 0x4 #define AD5686_CMD_READBACK_ENABLE_V2 0x5 + +#define AD5310_REF_BIT_MSK BIT(8) #define AD5683_REF_BIT_MSK BIT(12) #define AD5693_REF_BIT_MSK BIT(12) @@ -45,6 +50,7 @@ * ad5686_supported_device_ids: */ enum ad5686_supported_device_ids { + ID_AD5310R, ID_AD5311R, ID_AD5671R, ID_AD5672R, @@ -72,6 +78,7 @@ enum ad5686_supported_device_ids { }; enum ad5686_regmap_type { + AD5310_REGMAP, AD5683_REGMAP, AD5686_REGMAP, AD5693_REGMAP