From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755304Ab1HWQjT (ORCPT ); Tue, 23 Aug 2011 12:39:19 -0400 Received: from opensource.wolfsonmicro.com ([80.75.67.52]:52296 "EHLO opensource2.wolfsonmicro.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753287Ab1HWQjO (ORCPT ); Tue, 23 Aug 2011 12:39:14 -0400 From: Mark Brown To: Liam Girdwood Cc: linux-kernel@vger.kernel.org, patches@opensource.wolfsonmicro.com, Mark Brown Subject: [PATCH] regulator: Add debugfs file showing the supply map table Date: Tue, 23 Aug 2011 17:39:10 +0100 Message-Id: <1314117550-6663-1-git-send-email-broonie@opensource.wolfsonmicro.com> X-Mailer: git-send-email 1.7.5.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Useful for working out why things aren't getting plugged together properly. Signed-off-by: Mark Brown --- drivers/regulator/core.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 files changed, 41 insertions(+), 0 deletions(-) diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index d8e6a42..9a33fe2 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -2907,6 +2907,43 @@ void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data) } EXPORT_SYMBOL_GPL(regulator_get_init_drvdata); +#ifdef CONFIG_DEBUG_FS +static ssize_t supply_map_read_file(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos) +{ + char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); + ssize_t len, ret = 0; + struct regulator_map *map; + + if (!buf) + return -ENOMEM; + + list_for_each_entry(map, ®ulator_map_list, list) { + len = snprintf(buf + ret, PAGE_SIZE - ret, + "%s -> %s.%s\n", + rdev_get_name(map->regulator), map->dev_name, + map->supply); + if (len >= 0) + ret += len; + if (ret > PAGE_SIZE) { + ret = PAGE_SIZE; + break; + } + } + + ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); + + kfree(buf); + + return ret; +} + +static const struct file_operations supply_map_fops = { + .read = supply_map_read_file, + .llseek = default_llseek, +}; +#endif + static int __init regulator_init(void) { int ret; @@ -2919,6 +2956,10 @@ static int __init regulator_init(void) pr_warn("regulator: Failed to create debugfs directory\n"); debugfs_root = NULL; } + + if (IS_ERR(debugfs_create_file("supply_map", 0444, debugfs_root, + NULL, &supply_map_fops))) + pr_warn("regulator: Failed to create supplies debugfs\n"); #endif regulator_dummy_init(); -- 1.7.5.4