[U-Boot] [PATCH 1/2] rockchip: clk: rv1108: remove duplicate reset init

[Heiko Stuebner <heiko@sntech.de>]

Hi Kever,

Am Donnerstag, 7. November 2019, 10:13:02 CET schrieb Heiko Stübner:
> Am Donnerstag, 7. November 2019, 10:03:19 CET schrieb Kever Yang:
> > On 2019/10/24 上午1:45, Heiko Stuebner wrote:
> > > rockchip_reset_bind() already does the needed init for the reset
> > > registers, only referenced the wrong cru structure.
> > >
> > > So we can get rid of the open-coded reset init and just fix
> > > the correct cru reference.
> > >
> > > Signed-off-by: Heiko Stuebner <heiko@sntech.de>
> > > ---
> > >   drivers/clk/rockchip/clk_rv1108.c | 13 +------------
> > >   1 file changed, 1 insertion(+), 12 deletions(-)
> > >
> > > diff --git a/drivers/clk/rockchip/clk_rv1108.c b/drivers/clk/rockchip/clk_rv1108.c
> > > index 3ebb007fab..5dc31e1eb0 100644
> > > --- a/drivers/clk/rockchip/clk_rv1108.c
> > > +++ b/drivers/clk/rockchip/clk_rv1108.c
> > > @@ -698,22 +698,11 @@ static int rv1108_clk_bind(struct udevice *dev)
> > >   	}
> > >   
> > >   #if CONFIG_IS_ENABLED(CONFIG_RESET_ROCKCHIP)
> > > -	ret = offsetof(struct rk3368_cru, softrst_con[0]);
> > > +	ret = offsetof(struct rv1108_cru, softrst_con[0]);
> > >   	ret = rockchip_reset_bind(dev, ret, 13);
> > >   	if (ret)
> > >   		debug("Warning: software reset driver bind faile\n");
> > >   #endif
> > > -	ret = device_bind_driver_to_node(dev, "rockchip_reset", "reset",
> > > -					 dev_ofnode(dev), &sf_child);
> > 
> > You can't just remove this blob of code, for there is a 'sysreset' 
> > driver and a 'reset' driver, they are
> > 
> > different, so you should fix this part to be available 'sysreset' driver 
> > so that the software can reset the SoC.
> 
> While there is a sysreset driver, it seems the rv1108 only did init
> the softrst code here and not the sysreset at all.
> 
> So rockchip_reset_bind really only does the same as the remove
> part of code. What I did see was that struct softreset_reg
> still is defined in the rockchip clock.h and after this patch no-one
> is using at all anymore. The rockchip_reset driver uses a different
> struct altogether it seems.
> 
> Adding an appropriate sysreset driver for rv1108
> should likely be a separate patch though.

I just sent a v2, dropping the unused softreset_reg struct as well.

When reviewing please take into account, the rv1108 had the following
situation before:

-registration of sysreset
- registration of old softreset - broken because that driver code is gone
- registration of new softreset - broken because of the CONFIG_* from patch2
			and also because it was using the wrong struct (rk3368 instead of rv1108)

now after the patch (in v2), we have the expected
- registration of sysreset
- registration of new softreset with correct cru struct

Heiko