| Message ID | 20210504125225.2536-1-shayne.chen@mediatek.com |
|---|---|
| State | New |
| Headers | show |
| Series | mt76: mt7915: add debugfs knob to read efuse value from FW | expand |
On 2021-05-04 14:52, Shayne Chen wrote: > In efuse mode, mt7915 only reads efuse values from FW which driver need. > Add a debugfs knob to read addtional efuse values from a specific field, > which is useful in some cases such as checking if rf values in efuse > are properly burned. > > An example of usage: > echo 0x400 > efuse_idx > hexdump -C eeprom > > Signed-off-by: Shayne Chen <shayne.chen@mediatek.com> I'd prefer if we read the entire efuse and put it in a "otp" debugfs file, like on older chips. - Felix
On Fri, 2021-05-28 at 10:56 +0200, Felix Fietkau wrote: > On 2021-05-04 14:52, Shayne Chen wrote: > > In efuse mode, mt7915 only reads efuse values from FW which driver > > need. > > Add a debugfs knob to read addtional efuse values from a specific > > field, > > which is useful in some cases such as checking if rf values in > > efuse > > are properly burned. > > > > An example of usage: > > echo 0x400 > efuse_idx > > hexdump -C eeprom > > > > Signed-off-by: Shayne Chen <shayne.chen@mediatek.com> > > I'd prefer if we read the entire efuse and put it in a "otp" debugfs > file, like on older chips. > > - Felix Hi Felix, Got it. I'll send another patch, please drop this one. Thanks, Shayne
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c index 6a8ddee..0526459 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c +++ b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c @@ -73,6 +73,21 @@ mt7915_radar_trigger(void *data, u64 val) DEFINE_DEBUGFS_ATTRIBUTE(fops_radar_trigger, NULL, mt7915_radar_trigger, "%lld\n"); +static int +mt7915_efuse_idx_set(void *data, u64 val) +{ + struct mt7915_dev *dev = data; + u8 *eep = dev->mt76.eeprom.data; + + if (eep[val] == 0xff && !dev->flash_mode) + mt7915_mcu_get_eeprom(dev, val); + + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(fops_efuse_idx, NULL, + mt7915_efuse_idx_set, "0x%llx\n"); + static int mt7915_fw_debug_set(void *data, u64 val) { @@ -390,6 +405,7 @@ int mt7915_init_debugfs(struct mt7915_dev *dev) debugfs_create_file("radar_trigger", 0200, dir, dev, &fops_radar_trigger); debugfs_create_file("ser_trigger", 0200, dir, dev, &fops_ser_trigger); + debugfs_create_file("efuse_idx", 0200, dir, dev, &fops_efuse_idx); debugfs_create_devm_seqfile(dev->mt76.dev, "temperature", dir, mt7915_read_temperature); debugfs_create_devm_seqfile(dev->mt76.dev, "txpower_sku", dir,
In efuse mode, mt7915 only reads efuse values from FW which driver need. Add a debugfs knob to read addtional efuse values from a specific field, which is useful in some cases such as checking if rf values in efuse are properly burned. An example of usage: echo 0x400 > efuse_idx hexdump -C eeprom Signed-off-by: Shayne Chen <shayne.chen@mediatek.com> --- .../net/wireless/mediatek/mt76/mt7915/debugfs.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)