[RFC 01/11] i2c: add quirk structure to describe adapter flaws
flat view
From: Eddie Huang <eddie.huang@mediatek.com>
Date: 2015-01-16 05:50:19
Also in:
linux-i2c, linux-mips, linuxppc-dev, lkml
Hi Wolfram, On Fri, 2015-01-09 at 18:21 +0100, Wolfram Sang wrote:
quoted hunk ↗ jump to hunk
+ */ +struct i2c_adapter_quirks { + u64 flags; + int max_num_msgs; + u16 max_write_len; + u16 max_read_len; + u16 max_comb_write_len; + u16 max_comb_read_len; +}; + +#define I2C_ADAPTER_QUIRK_COMB_WRITE_FIRST BIT(0) +#define I2C_ADAPTER_QUIRK_COMB_READ_SECOND BIT(1) +#define I2C_ADAPTER_QUIRK_COMB_WRITE_THEN_READ (I2C_ADAPTER_QUIRK_COMB_WRITE_FIRST | \ + I2C_ADAPTER_QUIRK_COMB_READ_SECOND) + /* * i2c_adapter is the structure used to identify a physical i2c bus along * with the access algorithms necessary to access it.@@ -472,6 +506,7 @@ struct i2c_adapter { struct list_head userspace_clients; struct i2c_bus_recovery_info *bus_recovery_info; + struct i2c_adapter_quirks *quirks; }; #define to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev)
I suggest to add const. const struct i2c_adapter_quirks *quirks; also, in i2c-core.c, should modify: const struct i2c_adapter_quirks *q = adap->quirks;