On Tue, 28 Jul 2020 at 01:13, Patrice Chotard <patrice.chot...@st.com> wrote: > > 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@5800a000 > STM32MP> bind /soc/ethernet@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.chot...@st.com> > Cc: Jean-Jacques Hiblot <jjhib...@ti.com> > Reviewed-by: Simon Glass <s...@chromium.org> > > --- > > (no changes since v3) > > Changes in v3: > - fix typo > > 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(-) >
Reviewed-by: Simon Glass <s...@chromium.org>