From patchwork Tue Nov 27 09:54:51 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sachin Kamat X-Patchwork-Id: 13234 Return-Path: X-Original-To: patchwork@peony.canonical.com Delivered-To: patchwork@peony.canonical.com Received: from fiordland.canonical.com (fiordland.canonical.com [91.189.94.145]) by peony.canonical.com (Postfix) with ESMTP id B823F23FC1 for ; Tue, 27 Nov 2012 10:01:22 +0000 (UTC) Received: from mail-ia0-f180.google.com (mail-ia0-f180.google.com [209.85.210.180]) by fiordland.canonical.com (Postfix) with ESMTP id 50157A19C64 for ; Tue, 27 Nov 2012 10:01:22 +0000 (UTC) Received: by mail-ia0-f180.google.com with SMTP id t4so5984072iag.11 for ; Tue, 27 Nov 2012 02:01:21 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-forwarded-to:x-forwarded-for:delivered-to:received-spf:from:to:cc :subject:date:message-id:x-mailer:x-gm-message-state; bh=92nRXMt+NaaT5EqJVKISVkeiGHPHCGGyWkgEjC8vtQA=; b=KlVSNylpkiyXwFzSRemtptjAEOWvxDRv4GxzsDrTs1Xpl7ss8kyS8K9wH40WvIDo7i 41otrM4SoXsXQK/6zJUOoykcuB3ZuBFtsUz/1cG8+sWWWXK+ThBDfDNEDy/CIy/XLLVh 79iT+qOwnDxuCQS1eQcJ0Lxvw/CXRxkCxUG6C8bh8EvSY44vhQ4OEa+Av4oK2JCVU7Ny 9aXV44hV+xcQ8cY/I/QkWnrBSA5eCJwEFiV9ZTzadsst+jFXtSp16vcIwJTmp8+R8MQd c2UFzRcOE4cPTGjddA3uTkaYUugQL/ZzkRX1Z0AVW5uKjf49YBpFHJngdaxEuS8wvdJ/ u7ew== Received: by 10.50.213.34 with SMTP id np2mr14923791igc.57.1354010481562; Tue, 27 Nov 2012 02:01:21 -0800 (PST) X-Forwarded-To: linaro-patchwork@canonical.com X-Forwarded-For: patch@linaro.org linaro-patchwork@canonical.com Delivered-To: patches@linaro.org Received: by 10.50.67.148 with SMTP id n20csp430099igt; Tue, 27 Nov 2012 02:01:21 -0800 (PST) Received: by 10.68.189.138 with SMTP id gi10mr46328269pbc.165.1354010480800; Tue, 27 Nov 2012 02:01:20 -0800 (PST) Received: from mail-pb0-f50.google.com (mail-pb0-f50.google.com [209.85.160.50]) by mx.google.com with ESMTPS id zz3si23643618pbc.151.2012.11.27.02.01.20 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 27 Nov 2012 02:01:20 -0800 (PST) Received-SPF: neutral (google.com: 209.85.160.50 is neither permitted nor denied by best guess record for domain of sachin.kamat@linaro.org) client-ip=209.85.160.50; Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.160.50 is neither permitted nor denied by best guess record for domain of sachin.kamat@linaro.org) smtp.mail=sachin.kamat@linaro.org Received: by mail-pb0-f50.google.com with SMTP id wz7so6478636pbc.9 for ; Tue, 27 Nov 2012 02:01:20 -0800 (PST) Received: by 10.68.224.8 with SMTP id qy8mr46117307pbc.88.1354010480479; Tue, 27 Nov 2012 02:01:20 -0800 (PST) Received: from localhost.localdomain ([115.113.119.130]) by mx.google.com with ESMTPS id d9sm1856205pav.24.2012.11.27.02.01.17 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 27 Nov 2012 02:01:19 -0800 (PST) From: Sachin Kamat To: linux-input@vger.kernel.org Cc: dmitry.torokhov@gmail.com, sachin.kamat@linaro.org, patches@linaro.org, Kukjin Kim Subject: [PATCH v2] Input: samsung-keypad - Use devm_* functions Date: Tue, 27 Nov 2012 15:24:51 +0530 Message-Id: <1354010091-31294-1-git-send-email-sachin.kamat@linaro.org> X-Mailer: git-send-email 1.7.4.1 X-Gm-Message-State: ALoCoQnODrAXJXhk22pH5AhPKEtowvBerJKUxrVdFD6U+Us7pBI4RrMpSznTN1cMLYHCH0S6xanv devm_* functions are device managed and make error handling and code simpler. While at it also fix error exit paths. Cc: Kukjin Kim Signed-off-by: Sachin Kamat Signed-off-by: Dmitry Torokhov --- drivers/input/keyboard/samsung-keypad.c | 103 +++++++++--------------------- 1 files changed, 31 insertions(+), 72 deletions(-) diff --git a/drivers/input/keyboard/samsung-keypad.c b/drivers/input/keyboard/samsung-keypad.c index acc1619..22e357b 100644 --- a/drivers/input/keyboard/samsung-keypad.c +++ b/drivers/input/keyboard/samsung-keypad.c @@ -309,7 +309,7 @@ static void samsung_keypad_parse_dt_gpio(struct device *dev, struct samsung_keypad *keypad) { struct device_node *np = dev->of_node; - int gpio, ret, row, col; + int gpio, error, row, col; for (row = 0; row < keypad->rows; row++) { gpio = of_get_named_gpio(np, "row-gpios", row); @@ -320,10 +320,11 @@ static void samsung_keypad_parse_dt_gpio(struct device *dev, continue; } - ret = gpio_request(gpio, "keypad-row"); - if (ret) - dev_err(dev, "keypad row[%d] gpio request failed\n", - row); + error = devm_gpio_request(dev, gpio, "keypad-row"); + if (error) + dev_err(dev, + "keypad row[%d] gpio request failed: %d\n", + row, error); } for (col = 0; col < keypad->cols; col++) { @@ -335,35 +336,19 @@ static void samsung_keypad_parse_dt_gpio(struct device *dev, continue; } - ret = gpio_request(gpio, "keypad-col"); - if (ret) - dev_err(dev, "keypad column[%d] gpio request failed\n", - col); + error = devm_gpio_request(dev, gpio, "keypad-col"); + if (error) + dev_err(dev, + "keypad column[%d] gpio request failed: %d\n", + col, error); } } - -static void samsung_keypad_dt_gpio_free(struct samsung_keypad *keypad) -{ - int cnt; - - for (cnt = 0; cnt < keypad->rows; cnt++) - if (gpio_is_valid(keypad->row_gpios[cnt])) - gpio_free(keypad->row_gpios[cnt]); - - for (cnt = 0; cnt < keypad->cols; cnt++) - if (gpio_is_valid(keypad->col_gpios[cnt])) - gpio_free(keypad->col_gpios[cnt]); -} #else static struct samsung_keypad_platdata *samsung_keypad_parse_dt(struct device *dev) { return NULL; } - -static void samsung_keypad_dt_gpio_free(struct samsung_keypad *keypad) -{ -} #endif static int samsung_keypad_probe(struct platform_device *pdev) @@ -405,36 +390,30 @@ static int samsung_keypad_probe(struct platform_device *pdev) row_shift = get_count_order(pdata->cols); keymap_size = (pdata->rows << row_shift) * sizeof(keypad->keycodes[0]); - keypad = kzalloc(sizeof(*keypad) + keymap_size, GFP_KERNEL); - input_dev = input_allocate_device(); - if (!keypad || !input_dev) { - error = -ENOMEM; - goto err_free_mem; - } + keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad) + keymap_size, + GFP_KERNEL); + input_dev = devm_input_allocate_device(&pdev->dev); + if (!keypad || !input_dev) + return -ENOMEM; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - error = -ENODEV; - goto err_free_mem; - } + if (!res) + return -ENODEV; - keypad->base = ioremap(res->start, resource_size(res)); - if (!keypad->base) { - error = -EBUSY; - goto err_free_mem; - } + keypad->base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); + if (!keypad->base) + return -EBUSY; - keypad->clk = clk_get(&pdev->dev, "keypad"); + keypad->clk = devm_clk_get(&pdev->dev, "keypad"); if (IS_ERR(keypad->clk)) { dev_err(&pdev->dev, "failed to get keypad clk\n"); - error = PTR_ERR(keypad->clk); - goto err_unmap_base; + return PTR_ERR(keypad->clk); } error = clk_prepare(keypad->clk); if (error) { dev_err(&pdev->dev, "keypad clock prepare failed\n"); - goto err_put_clk; + return error; } keypad->input_dev = input_dev; @@ -479,14 +458,15 @@ static int samsung_keypad_probe(struct platform_device *pdev) keypad->irq = platform_get_irq(pdev, 0); if (keypad->irq < 0) { error = keypad->irq; - goto err_put_clk; + goto err_unprepare_clk; } - error = request_threaded_irq(keypad->irq, NULL, samsung_keypad_irq, - IRQF_ONESHOT, dev_name(&pdev->dev), keypad); + error = devm_request_threaded_irq(&pdev->dev, keypad->irq, NULL, + samsung_keypad_irq, IRQF_ONESHOT, + dev_name(&pdev->dev), keypad); if (error) { dev_err(&pdev->dev, "failed to register keypad interrupt\n"); - goto err_put_clk; + goto err_unprepare_clk; } device_init_wakeup(&pdev->dev, pdata->wakeup); @@ -495,7 +475,7 @@ static int samsung_keypad_probe(struct platform_device *pdev) error = input_register_device(keypad->input_dev); if (error) - goto err_free_irq; + goto err_disable_runtime_pm; if (pdev->dev.of_node) { devm_kfree(&pdev->dev, (void *)pdata->keymap_data->keymap); @@ -504,22 +484,12 @@ static int samsung_keypad_probe(struct platform_device *pdev) } return 0; -err_free_irq: - free_irq(keypad->irq, keypad); +err_disable_runtime_pm: pm_runtime_disable(&pdev->dev); device_init_wakeup(&pdev->dev, 0); platform_set_drvdata(pdev, NULL); err_unprepare_clk: clk_unprepare(keypad->clk); -err_put_clk: - clk_put(keypad->clk); - samsung_keypad_dt_gpio_free(keypad); -err_unmap_base: - iounmap(keypad->base); -err_free_mem: - input_free_device(input_dev); - kfree(keypad); - return error; } @@ -533,18 +503,7 @@ static int samsung_keypad_remove(struct platform_device *pdev) input_unregister_device(keypad->input_dev); - /* - * It is safe to free IRQ after unregistering device because - * samsung_keypad_close will shut off interrupts. - */ - free_irq(keypad->irq, keypad); - clk_unprepare(keypad->clk); - clk_put(keypad->clk); - samsung_keypad_dt_gpio_free(keypad); - - iounmap(keypad->base); - kfree(keypad); return 0; }