Hello Lukasz,
Am 31.03.2014 08:17, schrieb Lukasz Majewski:
Hi Heiko,
Hello Simon, Lukasz,
Am 30.03.2014 01:17, schrieb Simon Glass:
Hi Lukasz,
On 27 March 2014 11:33, Lukasz Majewski<l.majew...@samsung.com>
wrote:
Hi Simon, Heiko
From: Aaron Durbin<adur...@chromium.org>
The current pmic i2c code assumes the current i2c bus is
the same as the pmic device's bus. There is nothing ensuring
that to be true. Therefore, select the proper bus before
performing a transaction.
Signed-off-by: Aaron Durbin<adur...@chromium.org>
Signed-off-by: Simon Glass<s...@chromium.org>
Reviewed-by: Simon Glass<s...@chromium.org>
---
drivers/power/power_i2c.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/power/power_i2c.c b/drivers/power/power_i2c.c
index ac76870..594cd11 100644
--- a/drivers/power/power_i2c.c
+++ b/drivers/power/power_i2c.c
@@ -23,6 +23,8 @@ int pmic_reg_write(struct pmic *p, u32 reg, u32
val) if (check_reg(p, reg))
return -1;
+ I2C_SET_BUS(p->bus);
+
Hadn't we had a discussion about this explicit setting of I2C
some time ago? I thought that this problem was solved within the
I2C rework.
Also I might be wrong, so please correct me if I'm wrong. Isn't the
I2C_SET_BUS() macro regarded as a obsolete after the I2C rework?
Agreed that would be ideal, but we would have to pass the bus
number of the i2c_read/write() functions. I don't believe the i2c
code has got that far yet.
Yes, thats the plan, but first, all i2c driver must be converted to
the new framework. After that we could start with such an approach
(or device model is ready and we can switch to it ...)
I know that there is a time line for introducing device model, but is
there any for switching I2C to the new approach?
I am not aware of a plan ...
I think about deleting obsolete/unmaintained boards, which will not
switch to new I2C approach.
Hmm... this would be a long list, as there are the following driver
which need a conversion:
obj-$(CONFIG_BFIN_TWI_I2C) += bfin-twi_i2c.o
obj-$(CONFIG_DRIVER_DAVINCI_I2C) += davinci_i2c.o
obj-$(CONFIG_DW_I2C) += designware_i2c.o
obj-$(CONFIG_I2C_MVTWSI) += mvtwsi.o
obj-$(CONFIG_I2C_MV) += mv_i2c.o
obj-$(CONFIG_I2C_MXS) += mxs_i2c.o
obj-$(CONFIG_PCA9564_I2C) += pca9564_i2c.o
obj-$(CONFIG_TSI108_I2C) += tsi108_i2c.o
obj-$(CONFIG_U8500_I2C) += u8500_i2c.o
obj-$(CONFIG_SH_SH7734_I2C) += sh_sh7734_i2c.o
Also some drivers in cpu dirs ... grep for HARD_I2C in u-boot
source (one Goal is to get rid of HARD_I2C).
./arch/powerpc/cpu/mpc8xx/i2c.c
./arch/powerpc/cpu/mpc8260/commproc.c
./arch/powerpc/cpu/mpc8260/i2c.c
./arch/powerpc/cpu/mpc5xxx/i2c.c
./arch/powerpc/cpu/mpc824x/drivers/i2c/i2c.c
./arch/powerpc/cpu/mpc512x/i2c.c
[...]
bye,
Heiko
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