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| author | Jiawen Wu <jiawenwu@trustnetic.com> | 2023-06-05 10:52:04 +0800 |
|---|---|---|
| committer | Wolfram Sang <wsa@kernel.org> | 2023-06-05 11:30:28 +0200 |
| commit | 2f8d1ed793453b9f7a832c96d699bf3dca176280 (patch) | |
| tree | 858a8bd34afea7214aaa91019ee2e94157358a38 /drivers/i2c/busses/i2c-designware-common.c | |
| parent | 4f5d68c8591498c3955dc0228ed6606c1b138278 (diff) | |
| download | lwn-2f8d1ed793453b9f7a832c96d699bf3dca176280.tar.gz lwn-2f8d1ed793453b9f7a832c96d699bf3dca176280.zip | |
i2c: designware: Add driver support for Wangxun 10Gb NIC
Wangxun 10Gb ethernet chip is connected to Designware I2C, to communicate
with SFP.
Introduce the property "wx,i2c-snps-model" to match device data for Wangxun
in software node case. Since IO resource was mapped on the ethernet driver,
add a model quirk to get regmap from parent device.
The exists IP limitations are dealt as workarounds:
- IP does not support interrupt mode, it works on polling mode.
- Additionally set FIFO depth address the chip issue.
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Reviewed-by: Piotr Raczynski <piotr.raczynski@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'drivers/i2c/busses/i2c-designware-common.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-designware-common.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-designware-common.c b/drivers/i2c/busses/i2c-designware-common.c index 0dc6b1ce663f..cdd8c67d9129 100644 --- a/drivers/i2c/busses/i2c-designware-common.c +++ b/drivers/i2c/busses/i2c-designware-common.c @@ -575,6 +575,14 @@ int i2c_dw_set_fifo_size(struct dw_i2c_dev *dev) unsigned int param; int ret; + /* DW_IC_COMP_PARAM_1 not implement for IP issue */ + if ((dev->flags & MODEL_MASK) == MODEL_WANGXUN_SP) { + dev->tx_fifo_depth = TXGBE_TX_FIFO_DEPTH; + dev->rx_fifo_depth = TXGBE_RX_FIFO_DEPTH; + + return 0; + } + /* * Try to detect the FIFO depth if not set by interface driver, * the depth could be from 2 to 256 from HW spec. |