172 lines
5.1 KiB
Diff
172 lines
5.1 KiB
Diff
From 6a09f5e80038570b15f81fdb1e5bde897e01868a Mon Sep 17 00:00:00 2001
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From: Rob Clark <robdclark@gmail.com>
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Date: Fri, 23 Jun 2017 15:36:33 -0400
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Subject: [PATCH] dm: core: also parse chosen node
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This is the node that would contain, for example, the framebuffer setup
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by an earlier stage.
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Signed-off-by: Rob Clark <robdclark@gmail.com>
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---
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arch/sandbox/dts/test.dts | 7 +++++++
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drivers/core/root.c | 12 ++++++++++++
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test/dm/bus.c | 2 +-
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test/dm/test-fdt.c | 2 +-
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4 files changed, 21 insertions(+), 2 deletions(-)
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diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
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index e67d428eb2..3f9e788e6c 100644
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--- a/arch/sandbox/dts/test.dts
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+++ b/arch/sandbox/dts/test.dts
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@@ -478,6 +478,13 @@
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wdt0: wdt@0 {
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compatible = "sandbox,wdt";
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};
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+
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+ chosen {
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+ chosen-test {
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+ compatible = "denx,u-boot-fdt-test";
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+ reg = <9 1>;
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+ };
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+ };
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};
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#include "sandbox_pmic.dtsi"
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diff --git a/drivers/core/root.c b/drivers/core/root.c
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index 976e2c4fdd..5a1c5994f6 100644
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--- a/drivers/core/root.c
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+++ b/drivers/core/root.c
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@@ -266,6 +266,18 @@ static int dm_scan_fdt_node(struct udevice *parent, const void *blob,
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for (offset = fdt_first_subnode(blob, offset);
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offset > 0;
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offset = fdt_next_subnode(blob, offset)) {
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+
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+ /* "chosen" node isn't a device itself but may contain some: */
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+ if (!strcmp(fdt_get_name(blob, offset, NULL), "chosen")) {
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+ pr_debug("parsing subnodes of \"chosen\"\n");
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+
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+ err = dm_scan_fdt_node(parent, blob, offset,
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+ pre_reloc_only);
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+ if (err && !ret)
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+ ret = err;
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+ continue;
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+ }
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+
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if (pre_reloc_only &&
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!dm_fdt_pre_reloc(blob, offset))
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continue;
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diff --git a/test/dm/bus.c b/test/dm/bus.c
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index 7006d4163d..1da398ae3a 100644
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--- a/test/dm/bus.c
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+++ b/test/dm/bus.c
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@@ -105,7 +105,7 @@ UCLASS_DRIVER(testbus) = {
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/* Test that we can probe for children */
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static int dm_test_bus_children(struct unit_test_state *uts)
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{
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- int num_devices = 6;
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+ int num_devices = 7;
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struct udevice *bus;
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struct uclass *uc;
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diff --git a/test/dm/test-fdt.c b/test/dm/test-fdt.c
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index dcc2ef8b65..920ccbf016 100644
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--- a/test/dm/test-fdt.c
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+++ b/test/dm/test-fdt.c
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@@ -167,7 +167,7 @@ int dm_check_devices(struct unit_test_state *uts, int num_devices)
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/* Test that FDT-based binding works correctly */
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static int dm_test_fdt(struct unit_test_state *uts)
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{
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- const int num_devices = 6;
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+ const int num_devices = 7;
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struct udevice *dev;
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struct uclass *uc;
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int ret;
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From 310feda7f7f40afbb26a158183e16c2c46eea28a Mon Sep 17 00:00:00 2001
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From: Rob Clark <robdclark@gmail.com>
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Date: Thu, 3 Aug 2017 09:52:14 -0400
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Subject: [PATCH] fdtdec: allow board to provide fdt for CONFIG_OF_SEPARATE
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Similar to CONFIG_OF_BOARD, but in this case the fdt is still built by
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u-boot build. This allows the board to patch the fdt, etc.
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In the specific case of dragonboard 410c, we pass the u-boot generated
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fdt to the previous stage of bootloader (by embedding it in the
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u-boot.img that is loaded by lk/aboot), which patches the fdt and passes
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it back to u-boot.
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Signed-off-by: Rob Clark <robdclark@gmail.com>
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---
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include/fdtdec.h | 3 ++-
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lib/fdtdec.c | 35 +++++++++++++++++++++++------------
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2 files changed, 25 insertions(+), 13 deletions(-)
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diff --git a/include/fdtdec.h b/include/fdtdec.h
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index 1ba02be8e1..c5acb8dae1 100644
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--- a/include/fdtdec.h
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+++ b/include/fdtdec.h
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@@ -988,7 +988,8 @@ int fdtdec_setup(void);
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/**
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* Board-specific FDT initialization. Returns the address to a device tree blob.
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- * Called when CONFIG_OF_BOARD is defined.
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+ * Called when CONFIG_OF_BOARD is defined, or if CONFIG_OF_SEPARATE is defined
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+ * and the board implements it.
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*/
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void *board_fdt_blob_setup(void);
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diff --git a/lib/fdtdec.c b/lib/fdtdec.c
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index 45f3fe7baf..15bd9b2572 100644
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--- a/lib/fdtdec.c
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+++ b/lib/fdtdec.c
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@@ -1258,6 +1258,28 @@ static int uncompress_blob(const void *src, ulong sz_src, void **dstp)
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# endif
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#endif
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+#ifdef CONFIG_OF_SEPARATE
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+/*
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+ * For CONFIG_OF_SEPARATE, the board may optionally implement this to
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+ * provide and/or fixup the fdt.
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+ */
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+__weak void *board_fdt_blob_setup(void)
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+{
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+ void *fdt_blob = NULL;
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+#ifdef CONFIG_SPL_BUILD
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+ /* FDT is at end of BSS unless it is in a different memory region */
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+ if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
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+ fdt_blob = (ulong *)&_image_binary_end;
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+ else
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+ fdt_blob = (ulong *)&__bss_end;
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+#else
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+ /* FDT is at end of image */
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+ fdt_blob = (ulong *)&_end;
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+#endif
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+ return fdt_blob;
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+}
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+#endif
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+
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int fdtdec_setup(void)
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{
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#if CONFIG_IS_ENABLED(OF_CONTROL)
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@@ -1267,18 +1289,7 @@ int fdtdec_setup(void)
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# ifdef CONFIG_OF_EMBED
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/* Get a pointer to the FDT */
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gd->fdt_blob = __dtb_dt_begin;
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-# elif defined CONFIG_OF_SEPARATE
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-# ifdef CONFIG_SPL_BUILD
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- /* FDT is at end of BSS unless it is in a different memory region */
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- if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
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- gd->fdt_blob = (ulong *)&_image_binary_end;
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- else
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- gd->fdt_blob = (ulong *)&__bss_end;
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-# else
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- /* FDT is at end of image */
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- gd->fdt_blob = (ulong *)&_end;
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-# endif
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-# elif defined(CONFIG_OF_BOARD)
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+# elif defined(CONFIG_OF_SEPARATE) || defined(CONFIG_OF_BOARD)
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/* Allow the board to override the fdt address. */
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gd->fdt_blob = board_fdt_blob_setup();
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# elif defined(CONFIG_OF_HOSTFILE)
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