From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751915AbeCTWcF (ORCPT ); Tue, 20 Mar 2018 18:32:05 -0400 Received: from mail-pl0-f68.google.com ([209.85.160.68]:42644 "EHLO mail-pl0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751758AbeCTWbp (ORCPT ); Tue, 20 Mar 2018 18:31:45 -0400 X-Google-Smtp-Source: AG47ELtEdihI5w+zDl9sowz/gl3dcXyw1EZ9nXUu+rCTSy/NmP/DOAlKyZFMZ7kltzAR/g/9t52naw== From: Dmitry Torokhov To: linux-input@vger.kernel.org, Benson Leung Cc: Nick Dyer , Olof Johansson , linux-kernel@vger.kernel.org Subject: [PATCH v2 02/14] Input: atmel_mxt_ts - switch from OF to generic device properties Date: Tue, 20 Mar 2018 15:31:26 -0700 Message-Id: <20180320223138.234724-3-dmitry.torokhov@gmail.com> X-Mailer: git-send-email 2.16.2.804.g6dcf76e118-goog In-Reply-To: <20180320223138.234724-1-dmitry.torokhov@gmail.com> References: <20180320223138.234724-1-dmitry.torokhov@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Instead of using OF-specific APIs to fecth device properties, let's switch to generic device properties API. This will allow us to use device properties on legacy ChromeOS devices and get rid of platform data down the road. Acked-by: Nick Dyer Signed-off-by: Dmitry Torokhov --- drivers/input/touchscreen/atmel_mxt_ts.c | 59 ++++++++++++------------ 1 file changed, 30 insertions(+), 29 deletions(-) diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c index 20e1224d1a6db..73d9c0254ad76 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -29,6 +29,7 @@ #include #include #include +#include #include #include #include @@ -2922,47 +2923,52 @@ static void mxt_input_close(struct input_dev *dev) mxt_stop(data); } -#ifdef CONFIG_OF -static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client) +static const struct mxt_platform_data * +mxt_parse_device_properties(struct i2c_client *client) { + static const char keymap_property[] = "linux,gpio-keymap"; struct mxt_platform_data *pdata; - struct device_node *np = client->dev.of_node; u32 *keymap; - int proplen, ret; - - if (!np) - return ERR_PTR(-ENOENT); + int n_keys; + int error; pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return ERR_PTR(-ENOMEM); - if (of_find_property(np, "linux,gpio-keymap", &proplen)) { - pdata->t19_num_keys = proplen / sizeof(u32); + if (device_property_present(&client->dev, keymap_property)) { + n_keys = device_property_read_u32_array(&client->dev, + keymap_property, + NULL, 0); + if (n_keys <= 0) { + error = n_keys < 0 ? n_keys : -EINVAL; + dev_err(&client->dev, + "invalid/malformed '%s' property: %d\n", + keymap_property, error); + return ERR_PTR(error); + } - keymap = devm_kzalloc(&client->dev, - pdata->t19_num_keys * sizeof(keymap[0]), - GFP_KERNEL); + keymap = devm_kmalloc_array(&client->dev, n_keys, sizeof(u32), + GFP_KERNEL); if (!keymap) return ERR_PTR(-ENOMEM); - ret = of_property_read_u32_array(np, "linux,gpio-keymap", - keymap, pdata->t19_num_keys); - if (ret) - dev_warn(&client->dev, - "Couldn't read linux,gpio-keymap: %d\n", ret); + error = device_property_read_u32_array(&client->dev, + keymap_property, + keymap, n_keys); + if (error) { + dev_err(&client->dev, + "failed to parse '%s' property: %d\n", + keymap_property, error); + return ERR_PTR(error); + } pdata->t19_keymap = keymap; + pdata->t19_num_keys = n_keys; } return pdata; } -#else -static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client) -{ - return ERR_PTR(-ENOENT); -} -#endif #ifdef CONFIG_ACPI @@ -3096,16 +3102,11 @@ mxt_get_platform_data(struct i2c_client *client) if (pdata) return pdata; - pdata = mxt_parse_dt(client); - if (!IS_ERR(pdata) || PTR_ERR(pdata) != -ENOENT) - return pdata; - pdata = mxt_parse_acpi(client); if (!IS_ERR(pdata) || PTR_ERR(pdata) != -ENOENT) return pdata; - dev_err(&client->dev, "No platform data specified\n"); - return ERR_PTR(-EINVAL); + return mxt_parse_device_properties(client); } static const struct dmi_system_id chromebook_T9_suspend_dmi[] = { -- 2.16.2.804.g6dcf76e118-goog