From patchwork Fri Jun 26 10:25:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Linus Walleij X-Patchwork-Id: 11627067 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6EC3C913 for ; Fri, 26 Jun 2020 10:25:09 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4BAB92070A for ; Fri, 26 Jun 2020 10:25:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="tLZDmBeJ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4BAB92070A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 767B56EC62; Fri, 26 Jun 2020 10:25:06 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-lj1-x243.google.com (mail-lj1-x243.google.com [IPv6:2a00:1450:4864:20::243]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3D0C86EC62 for ; Fri, 26 Jun 2020 10:25:05 +0000 (UTC) Received: by mail-lj1-x243.google.com with SMTP id 9so9774177ljv.5 for ; Fri, 26 Jun 2020 03:25:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=TNjCAgKAbk+msi5pmTXJi15eJti80Wxw8XhtgKoiBWg=; b=tLZDmBeJsuQfZeiznHfGuvEM0wNsbctBKmcqcSBeZqUe4r0xz1l/F4HAr7tYjHHv9E I9OGWGPh+kP3mbl8AIc3SSBrRtNGH8OJ4aHGgOe1rcq/u0LS94z/nvcdD+fF+j7ry210 vW3nw+JAKZPHSdK9utUZKsErRIh03iG0+xyRU6dugYGdxeb46nOP+JmzuGMc9KPYPiYC +g+Dg881dWSd4GNjgIkqRXQgj+N7WaKjA5z8A6vgjfeEEAO3JrpvYTGdm7Fl6zAVSJgr t+JfJ0V7xxz/sZYAneWFaYiOIwPiQ17jfvUGUFWbrcgRGNqDxApj9xJe+JpN6L9jsG8Y 8XCQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=TNjCAgKAbk+msi5pmTXJi15eJti80Wxw8XhtgKoiBWg=; b=aqlpz3OIknYhh0it9ChCqnoPDOQRcsVoSbd5khWxbSSZ3nnNZ/GsewpTqSUt3dyTUi FT5k/dkXg0Iw2r8N2olGRe5paLPpLwiu9JsVVUBYA5MSulpk7Vc4Il3+Gzzc9O9hA0pU PcZZzasoye789gmKCxK8B/uyeEeA75R1ylQkXt9H/xIzI71rasCnLM4Z5Covcyy0lFXT LN9AnCNvolFCZUPkU3nMJMFxgTBk5Bki5cGGXfYc+gEZT6lV+DR7P6Us3lv/oxEQWMix fXyhhsOFpIocEQ21AT5NokiTlvjS8VRDt8dGGBT6hx9wVYf1WBUYT2+xVZkkGhpsrH6G 3TmA== X-Gm-Message-State: AOAM533JNjzHMs/of7JsQL/fHVcfQgcoHtz8uGitLnGv/RWc/h+pcc/1 CLpXJmtdjZQIgQ7sZElSdGHzxQ== X-Google-Smtp-Source: ABdhPJwaYiLKuuBzVDCK7oQNxoQ4n+lIDMMtQLPJROPMkS3yl5UnhYwhSt9rkmvfXLX95ial2uwtzQ== X-Received: by 2002:a2e:b8c2:: with SMTP id s2mr1179823ljp.368.1593167103481; Fri, 26 Jun 2020 03:25:03 -0700 (PDT) Received: from genomnajs.lan (c-d63ee155.152980-0-69706f6e6c79.bbcust.telenor.se. [85.225.62.214]) by smtp.gmail.com with ESMTPSA id i8sm6311559lja.18.2020.06.26.03.25.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 26 Jun 2020 03:25:02 -0700 (PDT) From: Linus Walleij To: Lee Jones , Daniel Thompson , Jingoo Han , dri-devel@lists.freedesktop.org Subject: [PATCH] backlight: Delete the OT200 backlight driver Date: Fri, 26 Jun 2020 12:25:00 +0200 Message-Id: <20200626102500.292230-1-linus.walleij@linaro.org> X-Mailer: git-send-email 2.25.4 MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" This driver has no in-kernel users. The device can only be populated by board files since it does not support device tree nor ACPI, and nothing in the kernel creates a device named "ot200-backlight". This driver has been in the kernel since 2012. If it is used by out-of-tree code that code should have been upstreamed by now, it's been 8 years. It uses the idiomatic forked GPIO of the CS5535 which combines pin control and GPIO into its private custom interface, which causes me a headache because that is not how we do things these days: we creates separate pin control and GPIO drivers. Delete this unused driver. Cc: Christian Gmeiner Signed-off-by: Linus Walleij Reviewed-by: Daniel Thompson --- drivers/video/backlight/Kconfig | 7 -- drivers/video/backlight/Makefile | 1 - drivers/video/backlight/ot200_bl.c | 162 ----------------------------- 3 files changed, 170 deletions(-) delete mode 100644 drivers/video/backlight/ot200_bl.c diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig index 7d22d7377606..95c546cc8774 100644 --- a/drivers/video/backlight/Kconfig +++ b/drivers/video/backlight/Kconfig @@ -386,13 +386,6 @@ config BACKLIGHT_LP8788 help This supports TI LP8788 backlight driver. -config BACKLIGHT_OT200 - tristate "Backlight driver for ot200 visualisation device" - depends on CS5535_MFGPT && GPIO_CS5535 - help - To compile this driver as a module, choose M here: the module will be - called ot200_bl. - config BACKLIGHT_PANDORA tristate "Backlight driver for Pandora console" depends on TWL4030_CORE diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile index 0c1a1524627a..2072d21b60f7 100644 --- a/drivers/video/backlight/Makefile +++ b/drivers/video/backlight/Makefile @@ -45,7 +45,6 @@ obj-$(CONFIG_BACKLIGHT_LP8788) += lp8788_bl.o obj-$(CONFIG_BACKLIGHT_LV5207LP) += lv5207lp.o obj-$(CONFIG_BACKLIGHT_MAX8925) += max8925_bl.o obj-$(CONFIG_BACKLIGHT_OMAP1) += omap1_bl.o -obj-$(CONFIG_BACKLIGHT_OT200) += ot200_bl.o obj-$(CONFIG_BACKLIGHT_PANDORA) += pandora_bl.o obj-$(CONFIG_BACKLIGHT_PCF50633) += pcf50633-backlight.o obj-$(CONFIG_BACKLIGHT_PWM) += pwm_bl.o diff --git a/drivers/video/backlight/ot200_bl.c b/drivers/video/backlight/ot200_bl.c deleted file mode 100644 index 23ee7106c72a..000000000000 --- a/drivers/video/backlight/ot200_bl.c +++ /dev/null @@ -1,162 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Copyright (C) 2012 Bachmann electronic GmbH - * Christian Gmeiner - * - * Backlight driver for ot200 visualisation device from - * Bachmann electronic GmbH. - */ - -#include -#include -#include -#include -#include -#include - -static struct cs5535_mfgpt_timer *pwm_timer; - -/* this array defines the mapping of brightness in % to pwm frequency */ -static const u8 dim_table[101] = {0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, - 4, 5, 5, 5, 5, 6, 6, 6, 7, 7, 7, 8, 8, 9, 9, - 10, 10, 11, 11, 12, 12, 13, 14, 15, 15, 16, - 17, 18, 19, 20, 21, 22, 23, 24, 26, 27, 28, - 30, 31, 33, 35, 37, 39, 41, 43, 45, 47, 50, - 53, 55, 58, 61, 65, 68, 72, 75, 79, 84, 88, - 93, 97, 103, 108, 114, 120, 126, 133, 140, - 147, 155, 163}; - -struct ot200_backlight_data { - int current_brightness; -}; - -#define GPIO_DIMM 27 -#define SCALE 1 -#define CMP1MODE 0x2 /* compare on GE; output high on compare - * greater than or equal */ -#define PWM_SETUP (SCALE | CMP1MODE << 6 | MFGPT_SETUP_CNTEN) -#define MAX_COMP2 163 - -static int ot200_backlight_update_status(struct backlight_device *bl) -{ - struct ot200_backlight_data *data = bl_get_data(bl); - int brightness = bl->props.brightness; - - if (bl->props.state & BL_CORE_FBBLANK) - brightness = 0; - - /* enable or disable PWM timer */ - if (brightness == 0) - cs5535_mfgpt_write(pwm_timer, MFGPT_REG_SETUP, 0); - else if (data->current_brightness == 0) { - cs5535_mfgpt_write(pwm_timer, MFGPT_REG_COUNTER, 0); - cs5535_mfgpt_write(pwm_timer, MFGPT_REG_SETUP, - MFGPT_SETUP_CNTEN); - } - - /* apply new brightness value */ - cs5535_mfgpt_write(pwm_timer, MFGPT_REG_CMP1, - MAX_COMP2 - dim_table[brightness]); - data->current_brightness = brightness; - - return 0; -} - -static int ot200_backlight_get_brightness(struct backlight_device *bl) -{ - struct ot200_backlight_data *data = bl_get_data(bl); - return data->current_brightness; -} - -static const struct backlight_ops ot200_backlight_ops = { - .update_status = ot200_backlight_update_status, - .get_brightness = ot200_backlight_get_brightness, -}; - -static int ot200_backlight_probe(struct platform_device *pdev) -{ - struct backlight_device *bl; - struct ot200_backlight_data *data; - struct backlight_properties props; - int retval = 0; - - /* request gpio */ - if (devm_gpio_request(&pdev->dev, GPIO_DIMM, - "ot200 backlight dimmer") < 0) { - dev_err(&pdev->dev, "failed to request GPIO %d\n", GPIO_DIMM); - return -ENODEV; - } - - /* request timer */ - pwm_timer = cs5535_mfgpt_alloc_timer(7, MFGPT_DOMAIN_ANY); - if (!pwm_timer) { - dev_err(&pdev->dev, "MFGPT 7 not available\n"); - return -ENODEV; - } - - data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); - if (!data) { - retval = -ENOMEM; - goto error_devm_kzalloc; - } - - /* setup gpio */ - cs5535_gpio_set(GPIO_DIMM, GPIO_OUTPUT_ENABLE); - cs5535_gpio_set(GPIO_DIMM, GPIO_OUTPUT_AUX1); - - /* setup timer */ - cs5535_mfgpt_write(pwm_timer, MFGPT_REG_CMP1, 0); - cs5535_mfgpt_write(pwm_timer, MFGPT_REG_CMP2, MAX_COMP2); - cs5535_mfgpt_write(pwm_timer, MFGPT_REG_SETUP, PWM_SETUP); - - data->current_brightness = 100; - props.max_brightness = 100; - props.brightness = 100; - props.type = BACKLIGHT_RAW; - - bl = devm_backlight_device_register(&pdev->dev, dev_name(&pdev->dev), - &pdev->dev, data, &ot200_backlight_ops, - &props); - if (IS_ERR(bl)) { - dev_err(&pdev->dev, "failed to register backlight\n"); - retval = PTR_ERR(bl); - goto error_devm_kzalloc; - } - - platform_set_drvdata(pdev, bl); - - return 0; - -error_devm_kzalloc: - cs5535_mfgpt_free_timer(pwm_timer); - return retval; -} - -static int ot200_backlight_remove(struct platform_device *pdev) -{ - /* on module unload set brightness to 100% */ - cs5535_mfgpt_write(pwm_timer, MFGPT_REG_COUNTER, 0); - cs5535_mfgpt_write(pwm_timer, MFGPT_REG_SETUP, MFGPT_SETUP_CNTEN); - cs5535_mfgpt_write(pwm_timer, MFGPT_REG_CMP1, - MAX_COMP2 - dim_table[100]); - - cs5535_mfgpt_free_timer(pwm_timer); - - return 0; -} - -static struct platform_driver ot200_backlight_driver = { - .driver = { - .name = "ot200-backlight", - }, - .probe = ot200_backlight_probe, - .remove = ot200_backlight_remove, -}; - -module_platform_driver(ot200_backlight_driver); - -MODULE_DESCRIPTION("backlight driver for ot200 visualisation device"); -MODULE_AUTHOR("Christian Gmeiner "); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:ot200-backlight");