Hi Simon, Jaehoon,
On 02/13/2017 05:51 PM, Jaehoon Chung wrote:
On 02/13/2017 06:23 PM, Kever Yang wrote:
Hi Simon,
On 01/16/2017 12:15 PM, Simon Glass wrote:
Hi Kever,
On 15 January 2017 at 18:28, Kever Yang <kever.y...@rock-chips.com> wrote:
Hi Simon,
I met two issue when using of-platdata
1. compitable name with '.'
I get compile error as below:
In file included from include/dt-structs.h:16:0,
from spl/dts/dt-platdata.c:3:
include/generated/dt-structs.h:26:35: error: expected identifier or ‘(’
before numeric constant
struct dtd_rockchip_rk3399_sdhci_5.1 {
^
spl/dts/dt-platdata.c:41:42: error: expected identifier or ‘(’ before
numeric constant
static struct dtd_rockchip_rk3399_sdhci_5.1 dtv_sdhci_at_fe330000 = {
^
spl/dts/dt-platdata.c:55:15: error: ‘dtv_sdhci_at_fe330000’ undeclared here
(not in a function)
.platdata = &dtv_sdhci_at_fe330000,
^
make[2]: *** [spl/dts/dt-platdata.o] Error 1
make[1]: *** [spl/u-boot-spl] Error 2
make: *** [__build_one_by_one] Error 2
The dts node starts like this:
sdhci: sdhci@fe330000 {
u-boot,dm-pre-reloc;
compatible = "rockchip,rk3399-sdhci-5.1",
"arasan,sdhci-5.1";
...
That just involves replacing '.' with '_'. I sent a patch.
2. multi compatible name
When a dts node have more than one compatible name, which is prefer to use?
for example, we have two dwmmc compatible name in rk3399, the tool is using
the first one,
while the source code using the last one.
"drivers/mmc/rockchip_dw_mmc.c"
23 struct rockchip_mmc_plat {
24 #if CONFIG_IS_ENABLED(OF_PLATDATA)
25 struct dtd_rockchip_rk3288_dw_mshc dtplat;
26 #endif
27 struct mmc_config cfg;
28 struct mmc mmc;
29 };
...
dts node
sdmmc: dwmmc@fe320000 {
compatible = "rockchip,rk3399-dw-mshc",
"rockchip,rk3288-dw-mshc";
I'm not sure of the best solution here (other than putting more
on-chip SRAM in your devices hint hint :-)
One option is something like:
struct rockchip_mmc_plat {
#if CONFIG_IS_ENABLED(OF_PLATDATA)
#ifdef CONFIG_ROCKCHIP_RK3288
struct dtd_rockchip_rk3288_dw_mshc dtplat;
#elif defined(CONFIG_ROCKCHIP_RK399)
struct dtd_rockchip_rk399_dw_mshc dtplat;
#endif
#endif
Obviously we don't want that as it is putting SoC-specific stuff in the driver.
IMO the compatible strings are being misused a bit. Can there not be a
compatible string which is common to all rockchip devices which use
this IP? Something like "rockchip,dw-mshc-v1"? Then you can avoid
adding a new compatible string every time you use the same IP in a
device.
Agree, but... this is from kernel, we can't control it unless all kernel
maintainers
have the same idea.
does it use just "rockchip,dw-mshc"? Maybe this can be common compatible for
rockchip.
If it needs add the other compatible in future, it should be added the specific
compatible at that time.
I don't think we will have a change in dts compatible for U-Boot dts,
because we will always using dts
file from kernel, so we will use it as is.
We can use "rockchip,rk3288-dw-mshc" for rk3288 and rk3399, here is the
document.
and for dw-mshc:
Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt
* compatible: should be
- "rockchip,rk2928-dw-mshc": for Rockchip RK2928 and following,
before RK3288
- "rockchip,rk3288-dw-mshc": for Rockchip RK3288
- "rockchip,rk3399-dw-mshc", "rockchip,rk3288-dw-mshc": for
Rockchip RK3399
For the compatible name, there had some discuss before, like this patch:
https://lists.gt.net/linux/kernel/2372182
So for the of-platdata, we can use "rockchip,rk3288-dw-mshc" to generate
the structure.
Thanks,
- Kever
Another option would be for dtoc to #define each compatible string to
the first one. If you think that would work, I could do a patch.
I think we can try with the first one in the driver for of-platdata,
this would have problem for the first compatible name is different but
they share the same driver, like syscon. For syscon, you have resolved with
a special dirver, not sure if other driver has the same problem.
Could you help to make a patch for this solution?
Thanks,
- Kever
Regards,
Simon
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