From patchwork Sun May 3 17:14:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Artur Rojek X-Patchwork-Id: 207893 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A7030C28CBC for ; Sun, 3 May 2020 17:05:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 788DD206B9 for ; Sun, 3 May 2020 17:05:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728815AbgECRFu (ORCPT ); Sun, 3 May 2020 13:05:50 -0400 Received: from relay2-d.mail.gandi.net ([217.70.183.194]:58493 "EHLO relay2-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728753AbgECRFu (ORCPT ); Sun, 3 May 2020 13:05:50 -0400 X-Originating-IP: 195.189.32.242 Received: from pc.localdomain (unknown [195.189.32.242]) (Authenticated sender: contact@artur-rojek.eu) by relay2-d.mail.gandi.net (Postfix) with ESMTPSA id 9FC9640007; Sun, 3 May 2020 17:05:44 +0000 (UTC) From: Artur Rojek To: Dmitry Torokhov , Rob Herring , Mark Rutland , Jonathan Cameron , Paul Cercueil , Andy Shevchenko Cc: Heiko Stuebner , Ezequiel Garcia , linux-input@vger.kernel.org, devicetree@vger.kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Artur Rojek Subject: [PATCH v6 1/7] dt-bindings: iio/adc: Convert ingenic-adc docs to YAML. Date: Sun, 3 May 2020 19:14:45 +0200 Message-Id: <20200503171451.44034-1-contact@artur-rojek.eu> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Convert the textual documentation of Device Tree bindings for the Ingenic JZ47xx SoCs ADC controller to YAML. The `interrupts` property is now explicitly listed and marked as required. While missing from the previous textual documentation, this property has been used with all the boards which probe this driver. Signed-off-by: Artur Rojek Tested-by: Paul Cercueil --- Changes: v6: new patch .../bindings/iio/adc/ingenic,adc.txt | 49 ------------ .../bindings/iio/adc/ingenic,adc.yaml | 74 +++++++++++++++++++ 2 files changed, 74 insertions(+), 49 deletions(-) delete mode 100644 Documentation/devicetree/bindings/iio/adc/ingenic,adc.txt create mode 100644 Documentation/devicetree/bindings/iio/adc/ingenic,adc.yaml diff --git a/Documentation/devicetree/bindings/iio/adc/ingenic,adc.txt b/Documentation/devicetree/bindings/iio/adc/ingenic,adc.txt deleted file mode 100644 index cd9048cf9dcf..000000000000 --- a/Documentation/devicetree/bindings/iio/adc/ingenic,adc.txt +++ /dev/null @@ -1,49 +0,0 @@ -* Ingenic JZ47xx ADC controller IIO bindings - -Required properties: - -- compatible: Should be one of: - * ingenic,jz4725b-adc - * ingenic,jz4740-adc - * ingenic,jz4770-adc -- reg: ADC controller registers location and length. -- clocks: phandle to the SoC's ADC clock. -- clock-names: Must be set to "adc". -- #io-channel-cells: Must be set to <1> to indicate channels are selected - by index. - -ADC clients must use the format described in iio-bindings.txt, giving -a phandle and IIO specifier pair ("io-channels") to the ADC controller. - -Example: - -#include - -adc: adc@10070000 { - compatible = "ingenic,jz4740-adc"; - #io-channel-cells = <1>; - - reg = <0x10070000 0x30>; - - clocks = <&cgu JZ4740_CLK_ADC>; - clock-names = "adc"; - - interrupt-parent = <&intc>; - interrupts = <18>; -}; - -adc-keys { - ... - compatible = "adc-keys"; - io-channels = <&adc INGENIC_ADC_AUX>; - io-channel-names = "buttons"; - ... -}; - -battery { - ... - compatible = "ingenic,jz4740-battery"; - io-channels = <&adc INGENIC_ADC_BATTERY>; - io-channel-names = "battery"; - ... -}; diff --git a/Documentation/devicetree/bindings/iio/adc/ingenic,adc.yaml b/Documentation/devicetree/bindings/iio/adc/ingenic,adc.yaml new file mode 100644 index 000000000000..e9c46fff840a --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/ingenic,adc.yaml @@ -0,0 +1,74 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +# Copyright 2019-2020 Artur Rojek +%YAML 1.2 +--- +$id: "http://devicetree.org/schemas/iio/adc/ingenic,adc.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: Ingenic JZ47xx ADC controller IIO bindings + +maintainers: + - Artur Rojek + +description: > + Industrial I/O subsystem bindings for ADC controller found in + Ingenic JZ47xx SoCs. + + ADC clients must use the format described in iio-bindings.txt, giving + a phandle and IIO specifier pair ("io-channels") to the ADC controller. + +properties: + compatible: + enum: + - ingenic,jz4725b-adc + - ingenic,jz4740-adc + - ingenic,jz4770-adc + + '#io-channel-cells': + const: 1 + description: + Must be set to <1> to indicate channels are selected by index. + + reg: + items: + - description: ADC controller registers location and length. + + clocks: + items: + - description: phandle to the SoC's ADC clock. + + clock-names: + items: + - const: adc + + interrupts: + items: + - description: IRQ line for the ADC. + +required: + - compatible + - '#io-channel-cells' + - reg + - clocks + - clock-names + - interrupts + +additionalProperties: false + +examples: + - | + #include + #include + + adc@10070000 { + compatible = "ingenic,jz4740-adc"; + #io-channel-cells = <1>; + + reg = <0x10070000 0x30>; + + clocks = <&cgu JZ4740_CLK_ADC>; + clock-names = "adc"; + + interrupt-parent = <&intc>; + interrupts = <18>; + }; From patchwork Sun May 3 17:14:46 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Artur Rojek X-Patchwork-Id: 207890 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 61585C47258 for ; Sun, 3 May 2020 17:06:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 44644206B9 for ; Sun, 3 May 2020 17:06:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728753AbgECRFw (ORCPT ); Sun, 3 May 2020 13:05:52 -0400 Received: from relay2-d.mail.gandi.net ([217.70.183.194]:60595 "EHLO relay2-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728783AbgECRFv (ORCPT ); Sun, 3 May 2020 13:05:51 -0400 X-Originating-IP: 195.189.32.242 Received: from pc.localdomain (unknown [195.189.32.242]) (Authenticated sender: contact@artur-rojek.eu) by relay2-d.mail.gandi.net (Postfix) with ESMTPSA id C81144000F; Sun, 3 May 2020 17:05:47 +0000 (UTC) From: Artur Rojek To: Dmitry Torokhov , Rob Herring , Mark Rutland , Jonathan Cameron , Paul Cercueil , Andy Shevchenko Cc: Heiko Stuebner , Ezequiel Garcia , linux-input@vger.kernel.org, devicetree@vger.kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Artur Rojek Subject: [PATCH v6 2/7] IIO: Ingenic JZ47xx: Error check clk_enable calls. Date: Sun, 3 May 2020 19:14:46 +0200 Message-Id: <20200503171451.44034-2-contact@artur-rojek.eu> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200503171451.44034-1-contact@artur-rojek.eu> References: <20200503171451.44034-1-contact@artur-rojek.eu> MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Introduce error checks for the clk_enable calls used in this driver. As part of the changes, move clk_enable/clk_disable calls out of ingenic_adc_set_config and into respective logic of its callers. Signed-off-by: Artur Rojek Tested-by: Paul Cercueil --- Changes: v6: new patch drivers/iio/adc/ingenic-adc.c | 23 ++++++++++++++++++++--- 1 file changed, 20 insertions(+), 3 deletions(-) diff --git a/drivers/iio/adc/ingenic-adc.c b/drivers/iio/adc/ingenic-adc.c index 39c0a609fc94..6c3bbba7c44b 100644 --- a/drivers/iio/adc/ingenic-adc.c +++ b/drivers/iio/adc/ingenic-adc.c @@ -73,7 +73,6 @@ static void ingenic_adc_set_config(struct ingenic_adc *adc, { uint32_t cfg; - clk_enable(adc->clk); mutex_lock(&adc->lock); cfg = readl(adc->base + JZ_ADC_REG_CFG) & ~mask; @@ -81,7 +80,6 @@ static void ingenic_adc_set_config(struct ingenic_adc *adc, writel(cfg, adc->base + JZ_ADC_REG_CFG); mutex_unlock(&adc->lock); - clk_disable(adc->clk); } static void ingenic_adc_enable(struct ingenic_adc *adc, @@ -124,6 +122,8 @@ static int ingenic_adc_write_raw(struct iio_dev *iio_dev, long m) { struct ingenic_adc *adc = iio_priv(iio_dev); + struct device *dev = iio_dev->dev.parent; + int ret; switch (m) { case IIO_CHAN_INFO_SCALE: @@ -131,6 +131,14 @@ static int ingenic_adc_write_raw(struct iio_dev *iio_dev, case INGENIC_ADC_BATTERY: if (!adc->soc_data->battery_vref_mode) return -EINVAL; + + ret = clk_enable(adc->clk); + if (ret) { + dev_err(dev, "Failed to enable clock: %d\n", + ret); + return ret; + } + if (val > JZ_ADC_BATTERY_LOW_VREF) { ingenic_adc_set_config(adc, JZ_ADC_REG_CFG_BAT_MD, @@ -142,6 +150,9 @@ static int ingenic_adc_write_raw(struct iio_dev *iio_dev, JZ_ADC_REG_CFG_BAT_MD); adc->low_vref_mode = true; } + + clk_disable(adc->clk); + return 0; default: return -EINVAL; @@ -317,6 +328,13 @@ static int ingenic_adc_read_chan_info_raw(struct ingenic_adc *adc, int *val) { int bit, ret, engine = (chan->channel == INGENIC_ADC_BATTERY); + struct device *dev = iio_priv_to_dev(adc)->dev.parent; + + ret = clk_enable(adc->clk); + if (ret) { + dev_err(dev, "Failed to enable clock: %d\n", ret); + return ret; + } /* We cannot sample AUX/AUX2 in parallel. */ mutex_lock(&adc->aux_lock); @@ -325,7 +343,6 @@ static int ingenic_adc_read_chan_info_raw(struct ingenic_adc *adc, ingenic_adc_set_config(adc, JZ_ADC_REG_CFG_AUX_MD, bit); } - clk_enable(adc->clk); ret = ingenic_adc_capture(adc, engine); if (ret) goto out; From patchwork Sun May 3 17:14:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Artur Rojek X-Patchwork-Id: 207892 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8E4A3C47247 for ; Sun, 3 May 2020 17:06:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 77637206CD for ; Sun, 3 May 2020 17:06:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728939AbgECRF6 (ORCPT ); Sun, 3 May 2020 13:05:58 -0400 Received: from relay2-d.mail.gandi.net ([217.70.183.194]:33921 "EHLO relay2-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728783AbgECRF5 (ORCPT ); Sun, 3 May 2020 13:05:57 -0400 X-Originating-IP: 195.189.32.242 Received: from pc.localdomain (unknown [195.189.32.242]) (Authenticated sender: contact@artur-rojek.eu) by relay2-d.mail.gandi.net (Postfix) with ESMTPSA id 15CBC40002; Sun, 3 May 2020 17:05:52 +0000 (UTC) From: Artur Rojek To: Dmitry Torokhov , Rob Herring , Mark Rutland , Jonathan Cameron , Paul Cercueil , Andy Shevchenko Cc: Heiko Stuebner , Ezequiel Garcia , linux-input@vger.kernel.org, devicetree@vger.kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Artur Rojek , Rob Herring Subject: [PATCH v6 4/7] dt-bindings: iio/adc: Add touchscreen idx for JZ47xx SoC ADC Date: Sun, 3 May 2020 19:14:48 +0200 Message-Id: <20200503171451.44034-4-contact@artur-rojek.eu> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200503171451.44034-1-contact@artur-rojek.eu> References: <20200503171451.44034-1-contact@artur-rojek.eu> MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Introduce support for touchscreen channels found in JZ47xx SoCs. Signed-off-by: Artur Rojek Tested-by: Paul Cercueil Acked-by: Rob Herring --- Changes: v2-v6: no change include/dt-bindings/iio/adc/ingenic,adc.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/dt-bindings/iio/adc/ingenic,adc.h b/include/dt-bindings/iio/adc/ingenic,adc.h index 42f871ab3272..95e20a8d6dc8 100644 --- a/include/dt-bindings/iio/adc/ingenic,adc.h +++ b/include/dt-bindings/iio/adc/ingenic,adc.h @@ -7,5 +7,7 @@ #define INGENIC_ADC_AUX 0 #define INGENIC_ADC_BATTERY 1 #define INGENIC_ADC_AUX2 2 +#define INGENIC_ADC_TOUCH_XP 3 +#define INGENIC_ADC_TOUCH_YP 4 #endif From patchwork Sun May 3 17:14:50 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Artur Rojek X-Patchwork-Id: 207891 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 687A2C28CBC for ; Sun, 3 May 2020 17:06:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 50D90206B9 for ; Sun, 3 May 2020 17:06:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728967AbgECRGF (ORCPT ); Sun, 3 May 2020 13:06:05 -0400 Received: from relay2-d.mail.gandi.net ([217.70.183.194]:60549 "EHLO relay2-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728783AbgECRGD (ORCPT ); Sun, 3 May 2020 13:06:03 -0400 X-Originating-IP: 195.189.32.242 Received: from pc.localdomain (unknown [195.189.32.242]) (Authenticated sender: contact@artur-rojek.eu) by relay2-d.mail.gandi.net (Postfix) with ESMTPSA id 8B6444000B; Sun, 3 May 2020 17:05:58 +0000 (UTC) From: Artur Rojek To: Dmitry Torokhov , Rob Herring , Mark Rutland , Jonathan Cameron , Paul Cercueil , Andy Shevchenko Cc: Heiko Stuebner , Ezequiel Garcia , linux-input@vger.kernel.org, devicetree@vger.kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Artur Rojek , Rob Herring Subject: [PATCH v6 6/7] dt-bindings: input: Add docs for ADC driven joystick. Date: Sun, 3 May 2020 19:14:50 +0200 Message-Id: <20200503171451.44034-6-contact@artur-rojek.eu> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200503171451.44034-1-contact@artur-rojek.eu> References: <20200503171451.44034-1-contact@artur-rojek.eu> MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Add documentation for the adc-joystick driver, used to provide support for joysticks connected over ADC. Signed-off-by: Artur Rojek Tested-by: Paul Cercueil Reviewed-by: Rob Herring --- Changes: v2: - Add `reg` property to axis subnode in order to enumerate the axes, - rename `linux,abs-code` property to `linux,code`, - drop `linux,` prefix from the remaining properties of axis subnode v3: no change v4: - remove "bindings" from the unique identifier string, - replace `|` with `>` for all description properties, - specify the number of items for `io-channels`, - correct the regex pattern of `axis` property, - specify the value range of `reg` property for each axis, - put `abs-range` properties under `allOf` v5: add `a-f` to the regex pattern of `axis` property v6: no change .../bindings/input/adc-joystick.yaml | 121 ++++++++++++++++++ 1 file changed, 121 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/adc-joystick.yaml diff --git a/Documentation/devicetree/bindings/input/adc-joystick.yaml b/Documentation/devicetree/bindings/input/adc-joystick.yaml new file mode 100644 index 000000000000..054406bbd22b --- /dev/null +++ b/Documentation/devicetree/bindings/input/adc-joystick.yaml @@ -0,0 +1,121 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +# Copyright 2019-2020 Artur Rojek +%YAML 1.2 +--- +$id: "http://devicetree.org/schemas/input/adc-joystick.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: ADC attached joystick + +maintainers: + - Artur Rojek + +description: > + Bindings for joystick devices connected to ADC controllers supporting + the Industrial I/O subsystem. + +properties: + compatible: + const: adc-joystick + + io-channels: + minItems: 1 + maxItems: 1024 + description: > + List of phandle and IIO specifier pairs. + Each pair defines one ADC channel to which a joystick axis is connected. + See Documentation/devicetree/bindings/iio/iio-bindings.txt for details. + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + +required: + - compatible + - io-channels + - '#address-cells' + - '#size-cells' + +additionalProperties: false + +patternProperties: + "^axis@[0-9a-f]+$": + type: object + description: > + Represents a joystick axis bound to the given ADC channel. + For each entry in the io-channels list, one axis subnode with a matching + reg property must be specified. + + properties: + reg: + minimum: 0 + maximum: 1023 + description: Index of an io-channels list entry bound to this axis. + + linux,code: + $ref: /schemas/types.yaml#/definitions/uint32 + description: EV_ABS specific event code generated by the axis. + + abs-range: + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32-array + - items: + - description: minimum value + - description: maximum value + description: > + Minimum and maximum values produced by the axis. + For an ABS_X axis this will be the left-most and right-most + inclination of the joystick. If min > max, it is left to userspace to + treat the axis as inverted. + This property is interpreted as two signed 32 bit values. + + abs-fuzz: + $ref: /schemas/types.yaml#/definitions/uint32 + description: > + Amount of noise in the input value. + Omitting this property indicates the axis is precise. + + abs-flat: + $ref: /schemas/types.yaml#/definitions/uint32 + description: > + Axial "deadzone", or area around the center position, where the axis + is considered to be at rest. + Omitting this property indicates the axis always returns to exactly + the center position. + + required: + - reg + - linux,code + - abs-range + + additionalProperties: false + +examples: + - | + #include + #include + + joystick: adc-joystick { + compatible = "adc-joystick"; + io-channels = <&adc INGENIC_ADC_TOUCH_XP>, + <&adc INGENIC_ADC_TOUCH_YP>; + #address-cells = <1>; + #size-cells = <0>; + + axis@0 { + reg = <0>; + linux,code = ; + abs-range = <3300 0>; + abs-fuzz = <4>; + abs-flat = <200>; + }; + axis@1 { + reg = <1>; + linux,code = ; + abs-range = <0 3300>; + abs-fuzz = <4>; + abs-flat = <200>; + }; + };