[PATCH v3] board: freescale: p1_p2_rdb_pc: Fix parsing inverted bits from boot input data

[Pali Rohár]

On Thursday 23 June 2022 15:04:08 Pali Rohár wrote:
> On Thursday 16 June 2022 14:37:07 Pali Rohár wrote:
> > On some boards upper 4 bits of i2c boot input data (register 0) are
> > inverted. Information which bits are inverted is stored in register 2.
> > 
> > So invert read input data back according to register 2 prior processing
> > them. This fixes printing "rom_loc: value" line during booting.
> > 
> > Signed-off-by: Pali Rohár <pali at kernel.org>
> > ---
> > Changes in v3:
> > * Rebased on top of the U-Boot next branch, commit a87a6fcd20c0e29fe55bfbb6917c4aa1f1bbce74
> 
> PING?

PING?

> > Changes in v2:
> > * Use register 2 for detecting which bits needs to be inverted
> > ---
> >  board/freescale/p1_p2_rdb_pc/p1_p2_rdb_pc.c | 6 ++++--
> >  1 file changed, 4 insertions(+), 2 deletions(-)
> > 
> > diff --git a/board/freescale/p1_p2_rdb_pc/p1_p2_rdb_pc.c b/board/freescale/p1_p2_rdb_pc/p1_p2_rdb_pc.c
> > index 6665aa4ba94e..d36306f35427 100644
> > --- a/board/freescale/p1_p2_rdb_pc/p1_p2_rdb_pc.c
> > +++ b/board/freescale/p1_p2_rdb_pc/p1_p2_rdb_pc.c
> > @@ -174,7 +174,7 @@ int checkboard(void)
> >  {
> >  	struct cpld_data *cpld_data = (void *)(CONFIG_SYS_CPLD_BASE);
> >  	ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
> > -	u8 in, out, io_config, val;
> > +	u8 in, out, invert, io_config, val;
> >  	int bus_num = CONFIG_SYS_SPD_BUS_NUM;
> >  
> >  	/* FIXME: This should just use the model from the device tree or similar */
> > @@ -198,6 +198,7 @@ int checkboard(void)
> >  
> >  	if (dm_i2c_read(dev, 0, &in, 1) < 0 ||
> >  	    dm_i2c_read(dev, 1, &out, 1) < 0 ||
> > +	    dm_i2c_read(dev, 2, &invert, 1) < 0 ||
> >  	    dm_i2c_read(dev, 3, &io_config, 1) < 0) {
> >  		printf("Error reading i2c boot information!\n");
> >  		return 0; /* Don't want to hang() on this error */
> > @@ -207,13 +208,14 @@ int checkboard(void)
> >  
> >  	if (i2c_read(CONFIG_SYS_I2C_PCA9557_ADDR, 0, 1, &in, 1) < 0 ||
> >  	    i2c_read(CONFIG_SYS_I2C_PCA9557_ADDR, 1, 1, &out, 1) < 0 ||
> > +	    i2c_read(CONFIG_SYS_I2C_PCA9557_ADDR, 2, 1, &invert, 1) < 0 ||
> >  	    i2c_read(CONFIG_SYS_I2C_PCA9557_ADDR, 3, 1, &io_config, 1) < 0) {
> >  		printf("Error reading i2c boot information!\n");
> >  		return 0; /* Don't want to hang() on this error */
> >  	}
> >  	#endif
> >  
> > -	val = (in & io_config) | (out & (~io_config));
> > +	val = ((in ^ invert) & io_config) | (out & (~io_config));
> >  
> >  	puts("rom_loc: ");
> >  	if ((val & (~__SW_BOOT_MASK)) == __SW_BOOT_SD) {
> > -- 
> > 2.20.1
> >