From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 598583F39EB for ; Wed, 19 Aug 2026 07:45:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787125551; cv=none; b=InLTsOKvsjsDT0xmE4254V0w7i6Yavuj50AL+YMNpq20KRYmdQ27YfmCcjtSC0ID/r+/XMowt3gKEFGoNM61xR6a3dn9xSQHrMHkub4SlxkwEzT20qy873SucJVO093o5ihwICaJSPfW9r8TrNYgR0KgnwtM+KucXXSSMYpweAk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787125551; c=relaxed/simple; bh=yoj/UHBoIgMtUx8cmvFEtnDNXWc+R3Mz4e5go8h+Ozg=; h=Subject:To:From:Date:Message-ID:MIME-Version:Content-Type; b=DRksAxxXN+r792W/meLlgwkEQbNv4TvYXmiAglOgLxdCMTsQI0k8Qj+t10Zqw+8B4h8kWHhlmbmf+aBz2b7rUTozdV9voKufLjSE+8dtW0ljM141glR5hnIXbRNcbKteJnC7Nb9ijQMxCda8+0981irBC7U896Wd7v0Y8PCCpWc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=LNO/BTN4; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="LNO/BTN4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7D2FA1F000E9; Wed, 19 Aug 2026 07:45:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1787125545; bh=FSonPhKi/MX1/nqG9PCcpV6QAcGP4DskSjbwr8P8kEg=; h=Subject:To:From:Date; b=LNO/BTN4a4GNyOHZKTcN7cfSb78KBRobS8GIvW+AuxCEEieu853Q9lvd9GYADA3DI TrRKaB0RU2Kl5ORWEK8MBVcYUggMOkgphzjv72SQe0S/8h8X0FBHXO73NCUR2yXj4v MdmcBqck2aE94qKAM2bgNAj1B+gxBC6K3/DAKMHs= Subject: patch "iio: adc: adi-axi-adc: add data size support for AD408X backend" added to char-misc-testing To: antoniu.miclaus@analog.com,Stable@vger.kernel.org,dlechner@baylibre.com,jonathan.cameron@oss.qualcomm.com From: Date: Wed, 19 Aug 2026 09:44:08 +0200 Message-ID: <2026081908-proofs-excursion-1cfa@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit This is a note to let you know that I've just added the patch titled iio: adc: adi-axi-adc: add data size support for AD408X backend to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-testing branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will be merged to the char-misc-next branch sometime soon, after it passes testing, and the merge window is open. If you have any questions about this process, please let me know. >From 60f6f7fd5f89c7f55991c5dc59f3ccc74cd6efd7 Mon Sep 17 00:00:00 2001 From: Antoniu Miclaus Date: Mon, 13 Jul 2026 11:40:42 +0300 Subject: iio: adc: adi-axi-adc: add data size support for AD408X backend The AD408X AXI core can pack the sample data on the bus using different word widths. Expose this through the data_size_set backend operation so that frontends can program the packet format field (bits 3:2 of the CNTRL_3 register) according to the ADC resolution: 20-bit, 16-bit and 14-bit map to packet format values 0, 1 and 2 respectively. Signed-off-by: Antoniu Miclaus Reviewed-by: David Lechner Cc: Signed-off-by: Jonathan Cameron --- drivers/iio/adc/adi-axi-adc.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c index ced0a2321ecf..aac6f4a0705e 100644 --- a/drivers/iio/adc/adi-axi-adc.c +++ b/drivers/iio/adc/adi-axi-adc.c @@ -54,6 +54,10 @@ #define AXI_AD485X_PACKET_FORMAT_24BIT 0x1 #define AXI_AD485X_PACKET_FORMAT_32BIT 0x2 #define AXI_AD408X_CNTRL_3_FILTER_EN_MSK BIT(0) +#define AXI_AD408X_CNTRL_3_PACKET_FORMAT_MSK GENMASK(3, 2) +#define AXI_AD408X_PACKET_FORMAT_20BIT 0x0 +#define AXI_AD408X_PACKET_FORMAT_16BIT 0x1 +#define AXI_AD408X_PACKET_FORMAT_14BIT 0x2 #define ADI_AXI_ADC_REG_SYNC_STATUS 0x0068 #define ADI_AXI_ADC_SYNC_STATUS_ADC_SYNC_MSK BIT(0) @@ -437,6 +441,31 @@ static int axi_adc_ad408x_filter_type_set(struct iio_backend *back, AXI_AD408X_CNTRL_3_FILTER_EN_MSK); } +static int axi_adc_ad408x_data_size_set(struct iio_backend *back, + unsigned int size) +{ + struct adi_axi_adc_state *st = iio_backend_get_priv(back); + unsigned int val; + + switch (size) { + case 20: + val = AXI_AD408X_PACKET_FORMAT_20BIT; + break; + case 16: + val = AXI_AD408X_PACKET_FORMAT_16BIT; + break; + case 14: + val = AXI_AD408X_PACKET_FORMAT_14BIT; + break; + default: + return -EINVAL; + } + + return regmap_update_bits(st->regmap, ADI_AXI_ADC_REG_CNTRL_3, + AXI_AD408X_CNTRL_3_PACKET_FORMAT_MSK, + FIELD_PREP(AXI_AD408X_CNTRL_3_PACKET_FORMAT_MSK, val)); +} + static int axi_adc_ad408x_interface_data_align(struct iio_backend *back, u32 timeout_us) { @@ -660,6 +689,7 @@ static const struct iio_backend_ops adi_ad408x_ops = { .free_buffer = axi_adc_free_buffer, .data_sample_trigger = axi_adc_data_sample_trigger, .filter_type_set = axi_adc_ad408x_filter_type_set, + .data_size_set = axi_adc_ad408x_data_size_set, .interface_data_align = axi_adc_ad408x_interface_data_align, .num_lanes_set = axi_adc_num_lanes_set, .debugfs_reg_access = iio_backend_debugfs_ptr(axi_adc_reg_access), -- 2.55.0