* [PATCH 1/2] fdt_support: call mtdparts_init() after finding MTD node to fix up
@ 2020-07-15 10:56 Masahiro Yamada
2020-07-15 10:56 ` [PATCH 2/2] fdt_support: skip MTD node with "disabled" in fdt_fixup_mtdparts() Masahiro Yamada
2020-07-16 15:43 ` [PATCH 1/2] fdt_support: call mtdparts_init() after finding MTD node to fix up Simon Glass
0 siblings, 2 replies; 6+ messages in thread
From: Masahiro Yamada @ 2020-07-15 10:56 UTC (permalink / raw)
To: u-boot
Platform code can call fdt_fixup_mtdparts() in order to hand U-Boot's
MTD partitions over to the Linux device tree.
Currently, fdt_fixup_mtdparts() calls mtdparts_init() in its entry.
If no target MTD device is found, an error message like follows is
displayed:
Device nand0 not found!
This occurs when the same code (e.g. arch/arm/mach-uniphier/fdt-fixup.c)
is shared among several boards, but not all boards support an MTD device.
Parse the DT first, then call mtdparts_init() only when the target MTD
node is found.
Yet, you still need to call mtdparts_init() before device_find().
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---
common/fdt_support.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/common/fdt_support.c b/common/fdt_support.c
index b010d0b552ad..717b2b6354c0 100644
--- a/common/fdt_support.c
+++ b/common/fdt_support.c
@@ -951,9 +951,7 @@ void fdt_fixup_mtdparts(void *blob, const struct node_info *node_info,
struct mtd_device *dev;
int i, idx;
int noff;
-
- if (mtdparts_init() != 0)
- return;
+ bool initialized = false;
for (i = 0; i < node_info_size; i++) {
idx = 0;
@@ -963,6 +961,13 @@ void fdt_fixup_mtdparts(void *blob, const struct node_info *node_info,
debug("%s: %s, mtd dev type %d\n",
fdt_get_name(blob, noff, 0),
node_info[i].compat, node_info[i].type);
+
+ if (!initialized) {
+ if (mtdparts_init() != 0)
+ return;
+ initialized = true;
+ }
+
dev = device_find(node_info[i].type, idx++);
if (dev) {
if (fdt_node_set_part_info(blob, noff, dev))
--
2.17.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH 2/2] fdt_support: skip MTD node with "disabled" in fdt_fixup_mtdparts()
2020-07-15 10:56 [PATCH 1/2] fdt_support: call mtdparts_init() after finding MTD node to fix up Masahiro Yamada
@ 2020-07-15 10:56 ` Masahiro Yamada
2020-07-16 15:43 ` Simon Glass
2020-07-16 15:43 ` [PATCH 1/2] fdt_support: call mtdparts_init() after finding MTD node to fix up Simon Glass
1 sibling, 1 reply; 6+ messages in thread
From: Masahiro Yamada @ 2020-07-15 10:56 UTC (permalink / raw)
To: u-boot
Currently, fdt_fixup_mtdparts() only checks the compatible property.
It is pointless to fix up the disabled node.
Skip the node if it has the property:
status = "disabled"
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---
common/fdt_support.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)
diff --git a/common/fdt_support.c b/common/fdt_support.c
index 717b2b6354c0..9e7191e22f70 100644
--- a/common/fdt_support.c
+++ b/common/fdt_support.c
@@ -955,9 +955,16 @@ void fdt_fixup_mtdparts(void *blob, const struct node_info *node_info,
for (i = 0; i < node_info_size; i++) {
idx = 0;
- noff = fdt_node_offset_by_compatible(blob, -1,
- node_info[i].compat);
- while (noff != -FDT_ERR_NOTFOUND) {
+ noff = -1;
+
+ while ((noff = fdt_node_offset_by_compatible(blob, noff,
+ node_info[i].compat)) >= 0) {
+ const char *prop;
+
+ prop = fdt_getprop(blob, noff, "status", NULL);
+ if (prop && !strcmp(prop, "disabled"))
+ continue;
+
debug("%s: %s, mtd dev type %d\n",
fdt_get_name(blob, noff, 0),
node_info[i].compat, node_info[i].type);
@@ -973,10 +980,6 @@ void fdt_fixup_mtdparts(void *blob, const struct node_info *node_info,
if (fdt_node_set_part_info(blob, noff, dev))
return; /* return on error */
}
-
- /* Jump to next flash node */
- noff = fdt_node_offset_by_compatible(blob, noff,
- node_info[i].compat);
}
}
}
--
2.17.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH 1/2] fdt_support: call mtdparts_init() after finding MTD node to fix up
2020-07-15 10:56 [PATCH 1/2] fdt_support: call mtdparts_init() after finding MTD node to fix up Masahiro Yamada
2020-07-15 10:56 ` [PATCH 2/2] fdt_support: skip MTD node with "disabled" in fdt_fixup_mtdparts() Masahiro Yamada
@ 2020-07-16 15:43 ` Simon Glass
1 sibling, 0 replies; 6+ messages in thread
From: Simon Glass @ 2020-07-16 15:43 UTC (permalink / raw)
To: u-boot
On Wed, 15 Jul 2020 at 04:57, Masahiro Yamada
<yamada.masahiro@socionext.com> wrote:
>
> Platform code can call fdt_fixup_mtdparts() in order to hand U-Boot's
> MTD partitions over to the Linux device tree.
>
> Currently, fdt_fixup_mtdparts() calls mtdparts_init() in its entry.
> If no target MTD device is found, an error message like follows is
> displayed:
>
> Device nand0 not found!
>
> This occurs when the same code (e.g. arch/arm/mach-uniphier/fdt-fixup.c)
> is shared among several boards, but not all boards support an MTD device.
>
> Parse the DT first, then call mtdparts_init() only when the target MTD
> node is found.
>
> Yet, you still need to call mtdparts_init() before device_find().
>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
> ---
>
> common/fdt_support.c | 11 ++++++++---
> 1 file changed, 8 insertions(+), 3 deletions(-)
Reviewed-by: Simon Glass <sjg@chromium.org>
>
> diff --git a/common/fdt_support.c b/common/fdt_support.c
> index b010d0b552ad..717b2b6354c0 100644
> --- a/common/fdt_support.c
> +++ b/common/fdt_support.c
> @@ -951,9 +951,7 @@ void fdt_fixup_mtdparts(void *blob, const struct node_info *node_info,
> struct mtd_device *dev;
> int i, idx;
> int noff;
> -
> - if (mtdparts_init() != 0)
> - return;
> + bool initialized = false;
How about inited as it is shorter?
>
> for (i = 0; i < node_info_size; i++) {
> idx = 0;
> @@ -963,6 +961,13 @@ void fdt_fixup_mtdparts(void *blob, const struct node_info *node_info,
> debug("%s: %s, mtd dev type %d\n",
> fdt_get_name(blob, noff, 0),
> node_info[i].compat, node_info[i].type);
> +
> + if (!initialized) {
> + if (mtdparts_init() != 0)
> + return;
> + initialized = true;
> + }
> +
> dev = device_find(node_info[i].type, idx++);
> if (dev) {
> if (fdt_node_set_part_info(blob, noff, dev))
> --
> 2.17.1
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH 2/2] fdt_support: skip MTD node with "disabled" in fdt_fixup_mtdparts()
2020-07-15 10:56 ` [PATCH 2/2] fdt_support: skip MTD node with "disabled" in fdt_fixup_mtdparts() Masahiro Yamada
@ 2020-07-16 15:43 ` Simon Glass
2020-07-17 1:35 ` Masahiro Yamada
0 siblings, 1 reply; 6+ messages in thread
From: Simon Glass @ 2020-07-16 15:43 UTC (permalink / raw)
To: u-boot
On Wed, 15 Jul 2020 at 04:57, Masahiro Yamada
<yamada.masahiro@socionext.com> wrote:
>
> Currently, fdt_fixup_mtdparts() only checks the compatible property.
> It is pointless to fix up the disabled node.
>
> Skip the node if it has the property:
>
> status = "disabled"
>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
> ---
>
> common/fdt_support.c | 17 ++++++++++-------
> 1 file changed, 10 insertions(+), 7 deletions(-)
Reviewed-by: Simon Glass <sjg@chromium.org>
Are there any tests for this code?
I am thinking we should migrate fdt_support to use livetree...
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH 2/2] fdt_support: skip MTD node with "disabled" in fdt_fixup_mtdparts()
2020-07-16 15:43 ` Simon Glass
@ 2020-07-17 1:35 ` Masahiro Yamada
2020-07-26 14:54 ` Simon Glass
0 siblings, 1 reply; 6+ messages in thread
From: Masahiro Yamada @ 2020-07-17 1:35 UTC (permalink / raw)
To: u-boot
On Fri, Jul 17, 2020 at 12:44 AM Simon Glass <sjg@chromium.org> wrote:
>
> On Wed, 15 Jul 2020 at 04:57, Masahiro Yamada
> <yamada.masahiro@socionext.com> wrote:
> >
> > Currently, fdt_fixup_mtdparts() only checks the compatible property.
> > It is pointless to fix up the disabled node.
> >
> > Skip the node if it has the property:
> >
> > status = "disabled"
> >
> > Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
> > ---
> >
> > common/fdt_support.c | 17 ++++++++++-------
> > 1 file changed, 10 insertions(+), 7 deletions(-)
>
> Reviewed-by: Simon Glass <sjg@chromium.org>
>
> Are there any tests for this code?
No test code.
It makes more effort since
testing this would need to probe an MTD device
as well as parsing DT.
> I am thinking we should migrate fdt_support to use livetree...
One important thing we should notice is we have
two different DT instances:
[1] DT blob for U-Boot - used for U-Boot driver model
[2] DT blob for Linux - passed when booting Linux
In my understanding, the livetree
is supposed to unflatten [1].
fdt_fixup_mtdparts() is obviously fixing [2].
I do not know how livetree would work
for this function.
--
Best Regards
Masahiro Yamada
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH 2/2] fdt_support: skip MTD node with "disabled" in fdt_fixup_mtdparts()
2020-07-17 1:35 ` Masahiro Yamada
@ 2020-07-26 14:54 ` Simon Glass
0 siblings, 0 replies; 6+ messages in thread
From: Simon Glass @ 2020-07-26 14:54 UTC (permalink / raw)
To: u-boot
Hi Masahiro,
On Thu, 16 Jul 2020 at 19:36, Masahiro Yamada <masahiroy@kernel.org> wrote:
>
> On Fri, Jul 17, 2020 at 12:44 AM Simon Glass <sjg@chromium.org> wrote:
> >
> > On Wed, 15 Jul 2020 at 04:57, Masahiro Yamada
> > <yamada.masahiro@socionext.com> wrote:
> > >
> > > Currently, fdt_fixup_mtdparts() only checks the compatible property.
> > > It is pointless to fix up the disabled node.
> > >
> > > Skip the node if it has the property:
> > >
> > > status = "disabled"
> > >
> > > Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
> > > ---
> > >
> > > common/fdt_support.c | 17 ++++++++++-------
> > > 1 file changed, 10 insertions(+), 7 deletions(-)
> >
> > Reviewed-by: Simon Glass <sjg@chromium.org>
> >
> > Are there any tests for this code?
>
> No test code.
>
> It makes more effort since
> testing this would need to probe an MTD device
> as well as parsing DT.
>
>
>
> > I am thinking we should migrate fdt_support to use livetree...
>
> One important thing we should notice is we have
> two different DT instances:
>
> [1] DT blob for U-Boot - used for U-Boot driver model
> [2] DT blob for Linux - passed when booting Linux
>
>
> In my understanding, the livetree
> is supposed to unflatten [1].
>
> fdt_fixup_mtdparts() is obviously fixing [2].
>
>
> I do not know how livetree would work
> for this function.
We need an implementation of livetree for [2].
Regards,
Simon
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2020-07-26 14:54 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-07-15 10:56 [PATCH 1/2] fdt_support: call mtdparts_init() after finding MTD node to fix up Masahiro Yamada
2020-07-15 10:56 ` [PATCH 2/2] fdt_support: skip MTD node with "disabled" in fdt_fixup_mtdparts() Masahiro Yamada
2020-07-16 15:43 ` Simon Glass
2020-07-17 1:35 ` Masahiro Yamada
2020-07-26 14:54 ` Simon Glass
2020-07-16 15:43 ` [PATCH 1/2] fdt_support: call mtdparts_init() after finding MTD node to fix up Simon Glass
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