From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.17]) (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 0765544C6E; Mon, 19 Feb 2024 17:03:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.17 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708362231; cv=none; b=HfqdSTxN4/FpP630lmyLNQ8lQjDvrdypQodoTzXovRVXc0HphCtKP1QBF4RS1ixN92I0rvPP4uUCivRpdHLK8FsZjWDpsAKIzdHjEmLQZK35atxlKVS4cL1zfxHkcsd/JHY9njNxhPncdYCKqH57asFUb/jY1jR78thd1+s/ehc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708362231; c=relaxed/simple; bh=XdwgCH4GhJq64BzVy3/gUxYOZMQMDnBvonE+oyY5QFA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YCdHpO36Lao23MzhFYctWA2hQh55jpPi417entZ3uKazYGn+IX7LOWF6NKHQpbzw2nlF742xnJt61vJppZVbHcCtjvnCGOyjjdvQLzZDBBlK3GLKf5Pqf+uE8/1l3fEGnig6l2PPQ4wKg1PzEJhu0+2cJnMK6htmtOEdY+3vqQY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=a+fQZK10; arc=none smtp.client-ip=198.175.65.17 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="a+fQZK10" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1708362230; x=1739898230; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=XdwgCH4GhJq64BzVy3/gUxYOZMQMDnBvonE+oyY5QFA=; b=a+fQZK10x3uD8kcrI+5RoIJ6vqMWSAKTtrYNgH37cubZMVwDuZKSvOsu 3KeWZFmmRkPotP1j6bC0n/M1i+TTXMypMq8Kdx3utbWSErtBCkJzvRtVM +NGmSezVgmk8hyCPdMWrxcKm0jbmdNdW5EjjRbUMtOTG83Bc9mj4g+xJ4 Z8V8mjKSxFkr6qphxAbC4pSOx/dtUgyUDyLZYwPp/QodBudqYvtoV1nhA Cy5KTHg0MxW1/Lk8vLgrzm8nR2N2KFP2YEqKZsLwxTeeIgyybP+b2vqRz 5tbwaov5P3OiTt4bm4bNTbdi815vFzCYn2HfJe9olrAXg/MZV8Mw4Cuw8 A==; X-IronPort-AV: E=McAfee;i="6600,9927,10989"; a="2577427" X-IronPort-AV: E=Sophos;i="6.06,170,1705392000"; d="scan'208";a="2577427" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orvoesa109.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Feb 2024 09:03:49 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10989"; a="936315371" X-IronPort-AV: E=Sophos;i="6.06,170,1705392000"; d="scan'208";a="936315371" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga001.fm.intel.com with ESMTP; 19 Feb 2024 09:03:46 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id 947E71063; Mon, 19 Feb 2024 19:03:41 +0200 (EET) From: Andy Shevchenko To: Krzysztof Kozlowski , Andy Shevchenko , Geert Uytterhoeven , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Robin van der Gracht , Paul Burton Subject: [PATCH v3 9/9] auxdisplay: Add driver for MAX695x 7-segment LED controllers Date: Mon, 19 Feb 2024 18:58:08 +0200 Message-ID: <20240219170337.2161754-10-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.43.0.rc1.1.gbec44491f096 In-Reply-To: <20240219170337.2161754-1-andriy.shevchenko@linux.intel.com> References: <20240219170337.2161754-1-andriy.shevchenko@linux.intel.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add initial driver for the MAX6958 and MAX6959 7-segment LED controllers. Signed-off-by: Andy Shevchenko --- drivers/auxdisplay/Kconfig | 14 +++ drivers/auxdisplay/Makefile | 1 + drivers/auxdisplay/max6959.c | 194 +++++++++++++++++++++++++++++++++++ 3 files changed, 209 insertions(+) create mode 100644 drivers/auxdisplay/max6959.c diff --git a/drivers/auxdisplay/Kconfig b/drivers/auxdisplay/Kconfig index 109ac253d160..bc295ede3c2c 100644 --- a/drivers/auxdisplay/Kconfig +++ b/drivers/auxdisplay/Kconfig @@ -59,6 +59,20 @@ config LCD2S is a simple single color character display. You have to connect it to an I2C bus. +config MAX6959 + tristate "Maxim MAX6958/6959 7-segment LED controller" + depends on I2C + select REGMAP_I2C + select LINEDISP + help + If you say yes here you get support for the following Maxim chips + (I2C 7-segment LED display controller): + - MAX6958 + - MAX6959 (input support) + + This driver can also be built as a module. If so, the module + will be called max6959. + menuconfig PARPORT_PANEL tristate "Parallel port LCD/Keypad Panel support" depends on PARPORT diff --git a/drivers/auxdisplay/Makefile b/drivers/auxdisplay/Makefile index 9197ea34e2d6..9718aedf6ee2 100644 --- a/drivers/auxdisplay/Makefile +++ b/drivers/auxdisplay/Makefile @@ -15,5 +15,6 @@ obj-$(CONFIG_CFAG12864B) += cfag12864b.o cfag12864bfb.o obj-$(CONFIG_LINEDISP) += line-display.o obj-$(CONFIG_IMG_ASCII_LCD) += img-ascii-lcd.o obj-$(CONFIG_HT16K33) += ht16k33.o +obj-$(CONFIG_MAX6959) += max6959.o obj-$(CONFIG_ARM_CHARLCD) += arm-charlcd.o diff --git a/drivers/auxdisplay/max6959.c b/drivers/auxdisplay/max6959.c new file mode 100644 index 000000000000..5519c014bd29 --- /dev/null +++ b/drivers/auxdisplay/max6959.c @@ -0,0 +1,194 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * MAX6958/6959 7-segment LED display controller + * Datasheet: + * https://www.analog.com/media/en/technical-documentation/data-sheets/MAX6958-MAX6959.pdf + * + * Copyright (c) 2024, Intel Corporation. + * Author: Andy Shevchenko + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include "line-display.h" + +/* Registers */ +#define REG_DECODE_MODE 0x01 +#define REG_INTENSITY 0x02 +#define REG_SCAN_LIMIT 0x03 +#define REG_CONFIGURATION 0x04 +#define REG_CONFIGURATION_S_BIT BIT(0) + +#define REG_DIGIT(x) (0x20 + (x)) +#define REG_DIGIT0 0x20 +#define REG_DIGIT1 0x21 +#define REG_DIGIT2 0x22 +#define REG_DIGIT3 0x23 + +#define REG_SEGMENTS 0x24 +#define REG_MAX REG_SEGMENTS + +struct max6959_priv { + struct linedisp linedisp; + struct delayed_work work; + struct regmap *regmap; +}; + +static void max6959_disp_update(struct work_struct *work) +{ + struct max6959_priv *priv = container_of(work, struct max6959_priv, work.work); + struct linedisp *linedisp = &priv->linedisp; + struct linedisp_map *map = linedisp->map; + char *s = linedisp->buf; + u8 buf[4]; + + /* Map segments according to datasheet */ + buf[0] = bitrev8(map_to_seg7(&map->map.seg7, *s++)) >> 1; + buf[1] = bitrev8(map_to_seg7(&map->map.seg7, *s++)) >> 1; + buf[2] = bitrev8(map_to_seg7(&map->map.seg7, *s++)) >> 1; + buf[3] = bitrev8(map_to_seg7(&map->map.seg7, *s++)) >> 1; + + regmap_bulk_write(priv->regmap, REG_DIGIT(0), buf, ARRAY_SIZE(buf)); +} + +static int max6959_linedisp_get_map_type(struct linedisp *linedisp) +{ + struct max6959_priv *priv = container_of(linedisp, struct max6959_priv, linedisp); + + INIT_DELAYED_WORK(&priv->work, max6959_disp_update); + return LINEDISP_MAP_SEG7; +} + +static void max6959_linedisp_update(struct linedisp *linedisp) +{ + struct max6959_priv *priv = container_of(linedisp, struct max6959_priv, linedisp); + + schedule_delayed_work(&priv->work, 0); +} + +static const struct linedisp_ops max6959_linedisp_ops = { + .get_map_type = max6959_linedisp_get_map_type, + .update = max6959_linedisp_update, +}; + +static int max6959_enable(struct max6959_priv *priv, bool enable) +{ + u8 mask = REG_CONFIGURATION_S_BIT; + u8 value = enable ? mask : 0; + + return regmap_update_bits(priv->regmap, REG_CONFIGURATION, mask, value); +} + +static void max6959_power_off(void *priv) +{ + max6959_enable(priv, false); +} + +static int max6959_power_on(struct max6959_priv *priv) +{ + struct device *dev = regmap_get_device(priv->regmap); + int ret; + + ret = max6959_enable(priv, true); + if (ret) + return ret; + + return devm_add_action_or_reset(dev, max6959_power_off, priv); +} + +static const struct regmap_config max6959_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = REG_MAX, + .cache_type = REGCACHE_MAPLE, +}; + +static int max6959_i2c_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct max6959_priv *priv; + int ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->regmap = devm_regmap_init_i2c(client, &max6959_regmap_config); + if (IS_ERR(priv->regmap)) + return PTR_ERR(priv->regmap); + + ret = max6959_power_on(priv); + if (ret) + return ret; + + ret = linedisp_register(&priv->linedisp, dev, 4, &max6959_linedisp_ops); + if (ret) + return ret; + + i2c_set_clientdata(client, priv); + + return 0; +} + +static void max6959_i2c_remove(struct i2c_client *client) +{ + struct max6959_priv *priv = i2c_get_clientdata(client); + + cancel_delayed_work_sync(&priv->work); + linedisp_unregister(&priv->linedisp); +} + +static int max6959_suspend(struct device *dev) +{ + return max6959_enable(dev_get_drvdata(dev), false); +} + +static int max6959_resume(struct device *dev) +{ + return max6959_enable(dev_get_drvdata(dev), true); +} + +static DEFINE_SIMPLE_DEV_PM_OPS(max6959_pm_ops, max6959_suspend, max6959_resume); + +static const struct i2c_device_id max6959_i2c_id[] = { + { "max6959" }, + { } +}; +MODULE_DEVICE_TABLE(i2c, max6959_i2c_id); + +static const struct of_device_id max6959_of_table[] = { + { .compatible = "maxim,max6959" }, + { } +}; +MODULE_DEVICE_TABLE(of, max6959_of_table); + +static struct i2c_driver max6959_i2c_driver = { + .driver = { + .name = "max6959", + .pm = pm_sleep_ptr(&max6959_pm_ops), + .of_match_table = max6959_of_table, + }, + .probe = max6959_i2c_probe, + .remove = max6959_i2c_remove, + .id_table = max6959_i2c_id, +}; +module_i2c_driver(max6959_i2c_driver); + +MODULE_DESCRIPTION("MAX6958/6959 7-segment LED controller"); +MODULE_AUTHOR("Andy Shevchenko "); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(LINEDISP); -- 2.43.0.rc1.1.gbec44491f096