From b3f6c73db732704945408cec19f2391d3eb7483e Mon Sep 17 00:00:00 2001 From: Fabio Estevam Date: Tue, 9 Dec 2014 23:39:53 -0200 Subject: [PATCH] mfd: da9052-core: Fix platform-device id collision Allow multiple DA9052 regulators be registered by registering with PLATFORM_DEVID_AUTO instead of PLATFORM_DEVID_NONE. The subdevices are currently registered with PLATFORM_DEVID_NONE, which will cause a name collision on the platform bus when multiple regulators are registered: [ 0.128855] da9052-regulator da9052-regulator: invalid regulator ID specified [ 0.128973] da9052-regulator: probe of da9052-regulator failed with error -22 [ 0.129148] ------------[ cut here ]------------ [ 0.129200] WARNING: CPU: 0 PID: 1 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x5c/0x7c() [ 0.129233] sysfs: cannot create duplicate filename '/devices/platform/soc/60000000.aips/63fc8000.i2c/i2c-0/0-0048/da9052-regulator ... [ 0.132891] ------------[ cut here ]------------ [ 0.132924] WARNING: CPU: 0 PID: 1 at lib/kobject.c:240 kobject_add_internal+0x24c/0x2cc() [ 0.132957] kobject_add_internal failed for da9052-regulator with -EEXIST, don't try to register things with the same name in the same directory. ... [ 0.137000] da9052 0-0048: mfd_add_devices failed: -17 [ 0.138486] da9052: probe of 0-0048 failed with error -17 Based on the fix done by Johan Hovold at commit b6684228726cc255 ("mfd: viperboard: Fix platform-device id collision"). Tested on a imx53-qsb board, where multiple DA9053 regulators can be successfully probed. Signed-off-by: Fabio Estevam Signed-off-by: Lee Jones --- drivers/mfd/da9052-core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/mfd/da9052-core.c b/drivers/mfd/da9052-core.c index 52a0c2f6264f..ae498b53ee40 100644 --- a/drivers/mfd/da9052-core.c +++ b/drivers/mfd/da9052-core.c @@ -554,7 +554,8 @@ int da9052_device_init(struct da9052 *da9052, u8 chip_id) return ret; } - ret = mfd_add_devices(da9052->dev, -1, da9052_subdev_info, + ret = mfd_add_devices(da9052->dev, PLATFORM_DEVID_AUTO, + da9052_subdev_info, ARRAY_SIZE(da9052_subdev_info), NULL, 0, NULL); if (ret) { dev_err(da9052->dev, "mfd_add_devices failed: %d\n", ret); -- 2.30.2