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https://github.com/brain-hackers/u-boot-brain
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71204e95ce
1. Introduce a new structure `struct mxc_i2c_bus`, this structure will
used for non-DM and DM.
2. Remove `struct mxc_i2c_regs` structure, but use register offset to access
registers based on `base` entry of `struct mxc_i2c_bus`.
3. Remove most `#ifdef I2C_QUIRK_REG`. Using driver_data to contain platform
flags. A new flag is introduced, I2C_QUIRK_FLAG.
4. Most functions use `struct mxc_i2c_bus` as one of the parameters.
Make most functions common to DM and non-DM, try to avoid duplicated code.
5. Support DM, but pinctrl is not included. Pinmux setting is still set
by setup_i2c, but we do not need bus_i2c_init for DM.
6. struct i2c_parms and struct sram_data are removed.
7. Remove bus_i2c_read bus_i2c_write prototype in header file. The frist
paramter of bus_i2c_init is modified to i2c index. Add new prototype
i2c_idle_bus and force_bus_idle. Since bus_i2c_init is not good for
DM I2C and pinctrl is missed, we use a weak function for i2c_idle_bus.
Board file take the responsibility to implement this function, like this:
"
int i2c_idle_bus(struct mxc_i2c_bus *i2c_bus)
{
if (i2c_bus->index == 0)
force_bus_idle(i2c_pads_info0);
else if (i2c_bus->index == 1)
force_bus_idle(i2c_pads_info1);
else
xxxxxx
}
"
8. Introduce a weak function, enable_i2c_clk
9. Tested on an i.MX7 platform. Log info:
=> dm tree
Class Probed Name
----------------------------------------
root [ + ] root_driver
simple_bus [ ] |-- soc
simple_bus [ ] | |-- aips-bus@30000000
simple_bus [ ] | | |-- anatop@30360000
simple_bus [ ] | | `-- snvs@30370000
simple_bus [ ] | |-- aips-bus@30400000
simple_bus [ ] | `-- aips-bus@30800000
i2c [ ] | |-- i2c@30a20000
i2c [ ] | `-- i2c@30a40000
simple_bus [ ] `-- regulators
=> i2c dev 0
Setting bus to 0
=> i2c probe
Valid chip addresses: 08 50
=> i2c md 8 31
0031: 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08
Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Acked-by: Simon Glass <sjg@chromium.org>
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|---|---|---|
| .. | ||
| adi_i2c.c | ||
| davinci_i2c.c | ||
| davinci_i2c.h | ||
| designware_i2c.c | ||
| designware_i2c.h | ||
| fsl_i2c.c | ||
| fti2c010.c | ||
| fti2c010.h | ||
| i2c_core.c | ||
| i2c-emul-uclass.c | ||
| i2c-gpio.c | ||
| i2c-uclass-compat.c | ||
| i2c-uclass.c | ||
| i2c-uniphier-f.c | ||
| i2c-uniphier.c | ||
| ihs_i2c.c | ||
| Kconfig | ||
| kona_i2c.c | ||
| lpc32xx_i2c.c | ||
| Makefile | ||
| mv_i2c.c | ||
| mv_i2c.h | ||
| mvtwsi.c | ||
| mxc_i2c.c | ||
| mxs_i2c.c | ||
| omap24xx_i2c.c | ||
| omap24xx_i2c.h | ||
| pca9564_i2c.c | ||
| ppc4xx_i2c.c | ||
| rcar_i2c.c | ||
| s3c24x0_i2c.c | ||
| s3c24x0_i2c.h | ||
| sandbox_i2c.c | ||
| sh_i2c.c | ||
| sh_sh7734_i2c.c | ||
| soft_i2c.c | ||
| tegra_i2c.c | ||
| tsi108_i2c.c | ||
| u8500_i2c.c | ||
| u8500_i2c.h | ||
| zynq_i2c.c | ||