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Tue, 8 Aug 2023 14:57:05 +0000 From: "larry.lai" To: lee@kernel.org, andriy.shevchenko@linux.intel.com, linus.walleij@linaro.org, pavel@ucw.cz Cc: linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-leds@vger.kernel.org, GaryWang@aaeon.com.tw, musa.lin@yunjingtech.com, michael.wang@yunjingtech.com, jack.chang@yunjingtech.com, noah.hung@yunjingtech.com, "larry.lai" , Gary Wang Subject: [PATCH V5 3/3] leds: Add support for UP board CPLD onboard LEDS Date: Tue, 8 Aug 2023 22:56:01 +0800 Message-Id: <20230808145601.9401-4-larry.lai@yunjingtech.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230808145601.9401-1-larry.lai@yunjingtech.com> References: <20230808145601.9401-1-larry.lai@yunjingtech.com> X-ClientProxiedBy: TY2PR02CA0005.apcprd02.prod.outlook.com (2603:1096:404:56::17) To SEYPR06MB6507.apcprd06.prod.outlook.com (2603:1096:101:177::9) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SEYPR06MB6507:EE_|KL1PR06MB6323:EE_ X-MS-Office365-Filtering-Correlation-Id: 663e7e48-9ab9-49d8-25c1-08db981fba95 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: yunjingtech.com X-MS-Exchange-CrossTenant-Network-Message-Id: 663e7e48-9ab9-49d8-25c1-08db981fba95 X-MS-Exchange-CrossTenant-AuthSource: SEYPR06MB6507.apcprd06.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Aug 2023 14:57:04.6295 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: be2d5505-f7e6-4600-bbe2-b3201c91b344 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: MxJimU9GiRcAmkL9BoKiStdVCzYd12aGsVBVMJfmNWrz2klFJQ5e37p+SLZ+vHuwTONdtO8kywGqCPbPeSRYo+Cohfv5ByeyqSRikQpzpuo= X-MS-Exchange-Transport-CrossTenantHeadersStamped: KL1PR06MB6323 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_BLOCKED,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org The UP boards come with a few FPGA-controlled onboard LEDs: * UP Board: yellow, green, red * UP Squared: blue, yellow, green, red This patch depends on patch "mfd: Add support for UP board CPLD/FPGA". Signed-off-by: Gary Wang Signed-off-by: larry.lai --- PATCH V4 -> PATCH V5 : There is no change. RFC 2023/04/25 -> PATCH V4 (1) Fixed kernel test robot compiler warning. (2) Remove mistakes with wrong Reviewed-by tags. RFC 2022/11/23 --> RFC 2023/04/25: Refer 2022/12/08 Lee Jones review, cleaned up coding style. PATCH V3 -> RFC 2022/11/23: Update the changes Copyright. PATCH V1 -> V3: There is no change. PATCH --> PATCH V1: Refer 2022/10/03 Andy Shevchenko review, cleaned up coding style. --- --- drivers/leds/Kconfig | 10 +++++ drivers/leds/Makefile | 1 + drivers/leds/leds-upboard.c | 79 +++++++++++++++++++++++++++++++++++++ 3 files changed, 90 insertions(+) create mode 100644 drivers/leds/leds-upboard.c diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 499d0f215a8b..d9d533cb38ca 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -872,6 +872,16 @@ source "drivers/leds/flash/Kconfig" comment "RGB LED drivers" source "drivers/leds/rgb/Kconfig" +config LEDS_UPBOARD + tristate "LED support for the UP board" + depends on LEDS_CLASS + depends on MFD_INTEL_UPBOARD_FPGA + help + This option enables support for the UP board LEDs. + + To compile this driver as a module, choose M here: the module + will be called leds-upboard. + comment "LED Triggers" source "drivers/leds/trigger/Kconfig" diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 4fd2f92cd198..e72956645646 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -83,6 +83,7 @@ obj-$(CONFIG_LEDS_TI_LMU_COMMON) += leds-ti-lmu-common.o obj-$(CONFIG_LEDS_TLC591XX) += leds-tlc591xx.o obj-$(CONFIG_LEDS_TPS6105X) += leds-tps6105x.o obj-$(CONFIG_LEDS_TURRIS_OMNIA) += leds-turris-omnia.o +obj-$(CONFIG_LEDS_UPBOARD) += leds-upboard.o obj-$(CONFIG_LEDS_WM831X_STATUS) += leds-wm831x-status.o obj-$(CONFIG_LEDS_WM8350) += leds-wm8350.o obj-$(CONFIG_LEDS_WRAP) += leds-wrap.o diff --git a/drivers/leds/leds-upboard.c b/drivers/leds/leds-upboard.c new file mode 100644 index 000000000000..8a44afe8c526 --- /dev/null +++ b/drivers/leds/leds-upboard.c @@ -0,0 +1,79 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * UP Board CPLD/FPGA based LED driver + * + * Copyright (c) AAEON. All rights reserved. + * + * Author: Gary Wang + */ + +#include +#include +#include +#include +#include +#include + +struct upboard_led { + struct regmap_field *field; + struct led_classdev cdev; + unsigned char bit; +}; + +static enum led_brightness upboard_led_brightness_get(struct led_classdev *cdev) +{ + struct upboard_led *led = container_of(cdev, struct upboard_led, cdev); + int brightness = 0; + + regmap_field_read(led->field, &brightness); + + return brightness; +}; + +static void upboard_led_brightness_set(struct led_classdev *cdev, enum led_brightness brightness) +{ + struct upboard_led *led = container_of(cdev, struct upboard_led, cdev); + + regmap_field_write(led->field, brightness != LED_OFF); +}; + +static int __init upboard_led_probe(struct platform_device *pdev) +{ + struct upboard_fpga * const up_fpga = dev_get_drvdata(pdev->dev.parent); + struct reg_field fldconf = { + .reg = UPFPGA_REG_FUNC_EN0, + }; + struct upboard_led_data * const pdata = pdev->dev.platform_data; + struct upboard_led *led; + + led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL); + if (!led) + return -ENOMEM; + + fldconf.lsb = pdata->bit; + fldconf.msb = pdata->bit; + led->field = devm_regmap_field_alloc(&pdev->dev, up_fpga->regmap, fldconf); + if (IS_ERR(led->field)) + return PTR_ERR(led->field); + + led->cdev.brightness_get = upboard_led_brightness_get; + led->cdev.brightness_set = upboard_led_brightness_set; + led->cdev.name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "upboard:%s:", + pdata->colour); + if (!led->cdev.name) + return -ENOMEM; + + return devm_led_classdev_register(&pdev->dev, &led->cdev); +}; + +static struct platform_driver upboard_led_driver = { + .driver = { + .name = "upboard-led", + }, +}; +module_platform_driver_probe(upboard_led_driver, upboard_led_probe); + +MODULE_AUTHOR("Gary Wang "); +MODULE_DESCRIPTION("UP Board LED driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:upboard-led");