From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757456Ab3LFKC2 (ORCPT ); Fri, 6 Dec 2013 05:02:28 -0500 Received: from mail-pb0-f48.google.com ([209.85.160.48]:51268 "EHLO mail-pb0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752891Ab3LFKCY (ORCPT ); Fri, 6 Dec 2013 05:02:24 -0500 Date: Fri, 6 Dec 2013 02:02:18 -0800 From: Dmitry Torokhov To: linux-input@vger.kernel.org Cc: Sachin Kamat , Jingoo Han , Thomas Abraham , Joonyoung Shim , linux-kernel@vger.kernel.org Subject: [PATCH] Input: samsung-keypad - favor platform data if present Message-ID: <20131206100215.GA27763@core.coreip.homeip.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We should be able to override firmware-provided parameters with in-kernel data, if needed. To that effect favor platform data, if present, over devicetree data. Signed-off-by: Dmitry Torokhov --- drivers/input/keyboard/samsung-keypad.c | 36 +++++++++++++++++++-------------- 1 file changed, 21 insertions(+), 15 deletions(-) diff --git a/drivers/input/keyboard/samsung-keypad.c b/drivers/input/keyboard/samsung-keypad.c index 9ac8a1e..a7357ad 100644 --- a/drivers/input/keyboard/samsung-keypad.c +++ b/drivers/input/keyboard/samsung-keypad.c @@ -244,8 +244,8 @@ static void samsung_keypad_close(struct input_dev *input_dev) } #ifdef CONFIG_OF -static struct samsung_keypad_platdata *samsung_keypad_parse_dt( - struct device *dev) +static struct samsung_keypad_platdata * +samsung_keypad_parse_dt(struct device *dev) { struct samsung_keypad_platdata *pdata; struct matrix_keymap_data *keymap_data; @@ -253,17 +253,22 @@ static struct samsung_keypad_platdata *samsung_keypad_parse_dt( struct device_node *np = dev->of_node, *key_np; unsigned int key_count; + if (!np) { + dev_err(dev, "missing device tree data\n"); + return ERR_PTR(-EINVAL); + } + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) { dev_err(dev, "could not allocate memory for platform data\n"); - return NULL; + return ERR_PTR(-ENOMEM); } of_property_read_u32(np, "samsung,keypad-num-rows", &num_rows); of_property_read_u32(np, "samsung,keypad-num-columns", &num_cols); if (!num_rows || !num_cols) { dev_err(dev, "number of keypad rows/columns not specified\n"); - return NULL; + return ERR_PTR(-EINVAL); } pdata->rows = num_rows; pdata->cols = num_cols; @@ -271,7 +276,7 @@ static struct samsung_keypad_platdata *samsung_keypad_parse_dt( keymap_data = devm_kzalloc(dev, sizeof(*keymap_data), GFP_KERNEL); if (!keymap_data) { dev_err(dev, "could not allocate memory for keymap data\n"); - return NULL; + return ERR_PTR(-ENOMEM); } pdata->keymap_data = keymap_data; @@ -280,7 +285,7 @@ static struct samsung_keypad_platdata *samsung_keypad_parse_dt( keymap = devm_kzalloc(dev, sizeof(uint32_t) * key_count, GFP_KERNEL); if (!keymap) { dev_err(dev, "could not allocate memory for keymap\n"); - return NULL; + return ERR_PTR(-ENOMEM); } keymap_data->keymap = keymap; @@ -294,16 +299,19 @@ static struct samsung_keypad_platdata *samsung_keypad_parse_dt( if (of_get_property(np, "linux,input-no-autorepeat", NULL)) pdata->no_autorepeat = true; + if (of_get_property(np, "linux,input-wakeup", NULL)) pdata->wakeup = true; return pdata; } #else -static -struct samsung_keypad_platdata *samsung_keypad_parse_dt(struct device *dev) +static struct samsung_keypad_platdata * +samsung_keypad_parse_dt(struct device *dev) { - return NULL; + dev_err(dev, "no platform data defined\n"); + + return ERR_PTR(-EINVAL); } #endif @@ -318,13 +326,11 @@ static int samsung_keypad_probe(struct platform_device *pdev) unsigned int keymap_size; int error; - if (pdev->dev.of_node) - pdata = samsung_keypad_parse_dt(&pdev->dev); - else - pdata = dev_get_platdata(&pdev->dev); + pdata = dev_get_platdata(&pdev->dev); if (!pdata) { - dev_err(&pdev->dev, "no platform data defined\n"); - return -EINVAL; + pdata = samsung_keypad_parse_dt(&pdev->dev); + if (IS_ERR(pdata)) + return PTR_ERR(pdata); } keymap_data = pdata->keymap_data; -- 1.8.3.1 -- Dmitry