From patchwork Tue Sep 28 13:30:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 12522621 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5D2FDC433EF for ; Tue, 28 Sep 2021 13:31:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3975360FC0 for ; Tue, 28 Sep 2021 13:31:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240883AbhI1Nd2 (ORCPT ); Tue, 28 Sep 2021 09:33:28 -0400 Received: from relay3-d.mail.gandi.net ([217.70.183.195]:42719 "EHLO relay3-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240964AbhI1Nd2 (ORCPT ); Tue, 28 Sep 2021 09:33:28 -0400 Received: (Authenticated sender: miquel.raynal@bootlin.com) by relay3-d.mail.gandi.net (Postfix) with ESMTPSA id 6A5BC60006; Tue, 28 Sep 2021 13:31:44 +0000 (UTC) From: Miquel Raynal To: Jonathan Cameron , Lars-Peter Clausen , Lee Jones Cc: Peter Meerwald-Stadler , Rob Herring , Dmitry Torokhov , bcousson@baylibre.com, Tony Lindgren , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-omap@vger.kernel.org, Thomas Petazzoni , Vignesh Raghavendra , Lokesh Vutla , Tero Kristo , Ryan Barnett , Grygorii Strashko , Jason Reeder , , Miquel Raynal Subject: [PATCH v4 00/48] TI AM437X ADC1 Date: Tue, 28 Sep 2021 15:30:55 +0200 Message-Id: <20210928133143.157329-1-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Hello, This is a (fairly big) series bringing support of AM437X ADC1. On TI AM33XX SoCs family there is an ADC that can also be connected to a touchscreen. This hardware has been extended and is present on certain SoCs from the AM437X family. In particular, the touchscreen has been replaced by a magnetic card reader. In both cases, the representation is an MFD device with two children: * on AM33XX: the touchscreen controller and the ADC * on AM437X: the magnetic stripe reader and the ADC This series really targets small and atomic changes so that the overall review is eased, even though it leads to a lot of rather small patches. Here are the steps: * Supporting the missing clock * Translating a single text file containing the description for the MFD, the touchscreen and the ADC into three independent yaml files. * Cleaning/preparing the MFD driver. * Supporting ADC1 in the MFD driver. * Cleaning/preparing of the ADC driver. * Supporting ADC1 in the ADC driver. * Updating various device trees. Here is the full series again, almost reviewed and acked entirely. The clock patch has been acked, the ADC patches as well, so we expect the series to go through the MFD tree if the maintainers agree with it. Thanks, Miquèl Changes in v4: * R-by/A-by tags added from Tony, Dmitry and Jonathan. * Inverted the order of three patches following Jonathan's advice: removing the ENB macro (and related definitions) should be done first, in order to avoid further updates of these useless macros. This lead to the addition of a new patch to first do the removal (which was part of patch "Drop useless definitions from the header" in the first place). * Updated the naming of the MFD driver data structure as discussed with Lee. * Used the "magnetic stripe reader" wording when appropriate. * Created a helper using the compatible to determine if there is a touchscreen or a magnetic stripe reader in this version of the hardware. Changes in v3: * Rebased on top of v5.15-rc1. * R-by/A-by tags added. * Light reordering to let the of_put_node() fix to be applied more easily * Dropped a patch made useless because of the previous reordering * Explained how the tscadc->ctrl variable was used. * Fixed a couple of typos. * Included the change for the HZ macro. * Went further in the BIT()/FIELD_PREP() cleanup. * Added maximum definitions for sample delay/open delay. * Removed useless definitions. * Fixed a couple of rebase conflicts (the series was not bisectable). Changes in v2: * Added various R-by/A-by tags. * Various typos & style fixes. [Bindings] * Included the missing ti,am654-tscadc compatible. * Reworded the compatible lines as requested by Jonathan. * Reworded the bindings content a little bit as advised by Rob (subnodes being objects, MFD descriptions provided once, status and unused labels removed). [SPDX changes] * Mentioned that the license macro and the license text matched. * Also added an SPDX tag in the MFD header. [MFD header] * Used the BIT(), GENMASK() and PREP_FIELD() macros when relevant. [MFD driver] * Did not reordered the variables declared on the probe stack as advised by Jonathan. * Added missing of_node_put() calls. * Moved the patch changing the place where the main structure is allocated to directly precede the patch using this change. * Fixed the driver data wiring (bug happening between ex patches 16 and 28). * Added a commit just to explain the reordering of the register writes during initialization/resume. * Explained the check about 'use_tsc' in the commit message. * Added a link to the TRM in a commit message referencing it. * Removed the use of the ti,tracks property, used a constant value instead. * Dropped the error check when retrieving the "wrong" DT property (coordiante-readouts) which is unused. Miquel Raynal (48): clk: ti: am43xx: Add clkctrl data for am43xx ADC1 dt-bindings: mfd: ti,am3359-tscadc: Add a yaml description for this MFD dt-bindings: touchscreen: ti,am3359-tsc: New yaml description dt-bindings: iio: adc: ti,am3359-adc: New yaml description dt-bindings: touchscreen: ti,am3359-tsc: Remove deprecated text file dt-bindings: mfd: ti,am3359-tscadc: Describe am4372 MFD compatible dt-bindings: iio: adc: ti,am3359-adc: Describe am4372 ADC compatible mfd: ti_am335x_tscadc: Ensure a balanced number of node get/put mfd: ti_am335x_tscadc: Replace license text with SPDX tag mfd: ti_am335x_tscadc: Fix style mfd: ti_am335x_tscadc: Drop extra spacing when declaring stack variables mfd: ti_am335x_tscadc: Get rid of useless gotos mfd: ti_am335x_tscadc: Reword the comment explaining the dividers mfd: ti_am335x_tscadc: Don't search the tree for our clock mfd: ti_am335x_tscadc: Simplify divisor calculation mfd: ti_am335x_tscadc: Move the driver structure allocation earlier mfd: ti_am335x_tscadc: Use driver data mfd: ti_am335x_tscadc: Mimic the probe from resume() mfd: ti_am335x_tscadc: Drop useless variables from the driver structure mfd: ti_am335x_tscadc: Always provide an idle configuration mfd: ti_am335x_tscadc: Reorder the initialization steps mfd: ti_am335x_tscadc: Gather the ctrl register logic in one place mfd: ti_am335x_tscadc: Replace the header license text with SPDX tag mfd: ti_am335x_tscadc: Fix header spacing mfd: ti_am335x_tscadc: Use the new HZ_PER_MHZ macro mfd: ti_am335x_tscadc: Drop unused definitions from the header mfd: ti_am335x_tscadc: Use BIT(), GENMASK() and FIELD_PREP() when relevant mfd: ti_am335x_tscadc: Clarify the maximum values for DT entries mfd: ti_am335x_tscadc: Drop useless definitions from the header mfd: ti_am335x_tscadc: Rename the subsystem enable macro mfd: ti_am335x_tscadc: Add TSC prefix in certain macros mfd: ti_am335x_tscadc: Rename a variable mfd: ti_am335x_tscadc: Fix an error message mfd: ti_am335x_tscadc: Add a boolean to clarify the presence of a touchscreen mfd: ti_am335x_tscadc: Introduce a helper to deal with the type of hardware mfd: ti_am335x_tscadc: Add ADC1/magnetic reader support mfd: ti_am335x_tscadc: Support the correctly spelled DT property iio: adc: ti_am335x_adc: Wait the idle state to avoid stalls iio: adc: ti_am335x_adc: Replace license text with SPDX tag iio: adc: ti_am335x_adc: Fix style iio: adc: ti_am335x_adc: Get rid of useless gotos iio: adc: ti_am335x_adc: Gather the checks on the delays iio: adc: ti_am335x_adc: Add a unit to the timeout delay iio: adc: ti_am335x_adc: Add the scale information iio: adc: ti_am335x_adc: Add the am437x compatible ARM: dts: am437x-cm-t43: Use a correctly spelled DT property ARM: dts: am43xx: Describe the magnetic reader/ADC1 hardware module ARM: dts: am437x-gp-evm: enable ADC1 .../bindings/iio/adc/ti,am3359-adc.yaml | 70 ++++++ .../input/touchscreen/ti,am3359-tsc.yaml | 76 ++++++ .../bindings/input/touchscreen/ti-tsc-adc.txt | 91 ------- .../bindings/mfd/ti,am3359-tscadc.yaml | 84 +++++++ arch/arm/boot/dts/am437x-cm-t43.dts | 2 +- arch/arm/boot/dts/am437x-gp-evm.dts | 8 + arch/arm/boot/dts/am437x-l4.dtsi | 31 ++- arch/arm/boot/dts/am43xx-clocks.dtsi | 7 + drivers/clk/ti/clk-43xx.c | 1 + drivers/iio/adc/ti_am335x_adc.c | 220 ++++++++++------- drivers/mfd/ti_am335x_tscadc.c | 233 ++++++++++-------- include/dt-bindings/clock/am4.h | 1 + include/linux/mfd/ti_am335x_tscadc.h | 119 +++++---- 13 files changed, 593 insertions(+), 350 deletions(-) create mode 100644 Documentation/devicetree/bindings/iio/adc/ti,am3359-adc.yaml create mode 100644 Documentation/devicetree/bindings/input/touchscreen/ti,am3359-tsc.yaml delete mode 100644 Documentation/devicetree/bindings/input/touchscreen/ti-tsc-adc.txt create mode 100644 Documentation/devicetree/bindings/mfd/ti,am3359-tscadc.yaml