Re: [PATCH] platform/x86: i2c-multi-instantiate: Derive the device name from parent

From: Hans de Goede
Date: Fri Sep 20 2019 - 06:32:47 EST


Hi,

On 9/20/19 12:02 PM, Heikki Krogerus wrote:
When naming the new devices, instead of using the ACPI ID in
the name as base, using the parent device's name. That makes
it possible to support multiple multi-instance i2c devices
of the same type in the same system.

This fixes an issue seen on some Intel Kaby Lake based
boards:

sysfs: cannot create duplicate filename '/devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-0/i2c-INT3515-tps6598x.0'

Fixes: 2336dfadfb1e ("platform/x86: i2c-multi-instantiate: Allow to have same slaves")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>

Patch looks good to me:

Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx>

Regards,

Hans


---
drivers/platform/x86/i2c-multi-instantiate.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/i2c-multi-instantiate.c b/drivers/platform/x86/i2c-multi-instantiate.c
index 61fe341a85aa..ea68f6ed66ae 100644
--- a/drivers/platform/x86/i2c-multi-instantiate.c
+++ b/drivers/platform/x86/i2c-multi-instantiate.c
@@ -90,7 +90,7 @@ static int i2c_multi_inst_probe(struct platform_device *pdev)
for (i = 0; i < multi->num_clients && inst_data[i].type; i++) {
memset(&board_info, 0, sizeof(board_info));
strlcpy(board_info.type, inst_data[i].type, I2C_NAME_SIZE);
- snprintf(name, sizeof(name), "%s-%s.%d", match->id,
+ snprintf(name, sizeof(name), "%s-%s.%d", dev_name(dev),
inst_data[i].type, i);
board_info.dev_name = name;
switch (inst_data[i].flags & IRQ_RESOURCE_TYPE) {