[PATCH v2 1/5] cmd: bind: allow to bind driver with driver data

[Patrice Chotard]

Initial implementation invokes device_bind_with_driver_data()
with driver_data parameter equal to 0.
For driver with driver data, the bind command can't bind
correctly this driver or even worse causes data abort as shown below:

As example, for debug purpose on STM32MP1 platform, ethernet (dwc_eth_qos.c)
driver needed to be unbinded/binded. This driver is using driver data:

static const struct udevice_id eqos_ids[] = {
    {
        .compatible = "nvidia,tegra186-eqos",
        .data = (ulong)&eqos_tegra186_config
    },
    {
        .compatible = "snps,dwmac-4.20a",
        .data = (ulong)&eqos_stm32_config
    },

    { }
};

After unbinding/binding this driver and probing it (with the dhcp command),
we got a prefetch abort as below:

STM32MP> unbind eth ethernet at 5800a000
STM32MP> bind /soc/ethernet at 5800a000 eth_eqos
STM32MP> dhcp
prefetch abort
pc : [<4310801c>]          lr : [<ffc8f4ad>]
reloc pc : [<035ba01c>]    lr : [<c01414ad>]
sp : fdaf19b0  ip : ffcea83c     fp : 00000001
r10: ffcfd4a0  r9 : fdaffed0     r8 : 00000000
r7 : ffcff304  r6 : fdc63220     r5 : 00000000  r4 : fdc5b108
r3 : 43108020  r2 : 00003d39     r1 : ffcea544  r0 : fdc63220
Flags: nZCv  IRQs off  FIQs off  Mode SVC_32
Code: data abort
pc : [<ffc4f9c0>]          lr : [<ffc4f9ad>]
reloc pc : [<c01019c0>]    lr : [<c01019ad>]
sp : fdaf18b8  ip : 00000000     fp : 00000001
r10: ffcd69b2  r9 : fdaffed0     r8 : ffcd69aa
r7 : 00000000  r6 : 00000008     r5 : 4310801c  r4 : fffffffc
r3 : 00000001  r2 : 00000028     r1 : 00000000  r0 : 00000006
Flags: NzCv  IRQs on  FIQs on  Mode SVC_32 (T)
Code: 2f00 d1e9 2c00 dce9 (f855) 2024
Resetting CPU ...

Signed-off-by: Patrice Chotard <patrice.chotard at st.com>
Cc: Jean-Jacques Hiblot <jjhiblot at ti.com>

---

Changes in v2:
   - add a bind command test
   - add bind command documentation in doc/driver/model/bind.rst
   - simplify patch 1 by using lists_bind_fdt()

 cmd/bind.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/cmd/bind.c b/cmd/bind.c
index 44a5f17f0d..0aefc531d8 100644
--- a/cmd/bind.c
+++ b/cmd/bind.c
@@ -7,6 +7,7 @@
 #include <dm.h>
 #include <dm/device-internal.h>
 #include <dm/lists.h>
+#include <dm/root.h>
 #include <dm/uclass-internal.h>
 
 static int bind_by_class_index(const char *uclass, int index,
@@ -150,8 +151,8 @@ static int bind_by_node_path(const char *path, const char *drv_name)
 	}
 
 	ofnode = ofnode_path(path);
-	ret = device_bind_with_driver_data(parent, drv, ofnode_get_name(ofnode),
-					   0, ofnode, &dev);
+	ret = lists_bind_fdt(parent, ofnode, &dev, false);
+
 	if (!dev || ret) {
 		printf("Unable to bind. err:%d\n", ret);
 		return ret;
-- 
2.17.1