[U-Boot] [PATCH 7/7] dm: x86: spi: Convert ICH SPI driver to driver model PCI API

[Simon Glass]

Hi Bin,

On 8 December 2015 at 06:24, Bin Meng <bmeng.cn at gmail.com> wrote:
> Hi Simon,
>
> On Tue, Dec 1, 2015 at 12:11 PM, Simon Glass <sjg at chromium.org> wrote:
>> At present this SPI driver works by searching the PCI buses for its
>> peripheral. It also uses the legacy PCI API.
>>
>> In addition the driver has code to determine the type of Intel PCH that is
>> used (version 7 or version 9). Now that we have proper PCH drivers we can
>> use those to obtain the information we need.
>>
>> While the device tree has a node for the SPI peripheral it is not in the
>> right place. It should be on the PCI bus as a sub-peripheral of the LPC
>> device.
>>
>> Update the device tree files to show the SPI controller within the PCH, so
>> that PCI access works as expected.
>>
>> Signed-off-by: Simon Glass <sjg at chromium.org>
>> ---
>>
>>  arch/x86/cpu/irq.c                  |   7 +-
>>  arch/x86/cpu/ivybridge/bd82x6x.c    |  11 +++
>>  arch/x86/dts/bayleybay.dts          | 160 +++++++++++++++++++-----------------
>>  arch/x86/dts/broadwell_som-6896.dts |  23 ++++--
>>  arch/x86/dts/chromebook_link.dts    |   3 +-
>>  arch/x86/dts/chromebox_panther.dts  |  33 ++++----
>>  arch/x86/dts/crownbay.dts           | 150 +++++++++++++++++----------------
>>  arch/x86/dts/galileo.dts            |  98 +++++++++++-----------
>>  arch/x86/dts/minnowmax.dts          | 158 ++++++++++++++++++-----------------
>>  arch/x86/dts/qemu-x86_i440fx.dts    |  26 +++---
>>  arch/x86/dts/qemu-x86_q35.dts       |  38 +++++----
>>  drivers/spi/ich.c                   | 115 ++++++--------------------
>>  12 files changed, 409 insertions(+), 413 deletions(-)
>>
>> diff --git a/arch/x86/cpu/irq.c b/arch/x86/cpu/irq.c
>> index 35b29f6..205405b 100644
>> --- a/arch/x86/cpu/irq.c
>> +++ b/arch/x86/cpu/irq.c
>> @@ -97,6 +97,7 @@ static int create_pirq_routing_table(void)
>>         struct irq_routing_table *rt;
>>         struct irq_info *slot, *slot_base;
>>         int irq_entries = 0;
>> +       int parent;
>>         int i;
>>         int ret;
>>
>> @@ -106,7 +107,11 @@ static int create_pirq_routing_table(void)
>>                 return -EINVAL;
>>         }
>>
>> -       ret = fdtdec_get_pci_addr(blob, node, FDT_PCI_SPACE_CONFIG,
>> +       /* TODO(sjg at chromium.org): Drop this when PIRQ is a driver */
>> +       parent = fdt_parent_offset(blob, node);
>> +       if (parent < 0)
>> +               return -EINVAL;
>> +       ret = fdtdec_get_pci_addr(blob, parent, FDT_PCI_SPACE_CONFIG,
>>                                   "reg", &addr);
>>         if (ret)
>>                 return ret;
>> diff --git a/arch/x86/cpu/ivybridge/bd82x6x.c b/arch/x86/cpu/ivybridge/bd82x6x.c
>> index 434dfd6..abd59da 100644
>> --- a/arch/x86/cpu/ivybridge/bd82x6x.c
>> +++ b/arch/x86/cpu/ivybridge/bd82x6x.c
>> @@ -9,6 +9,7 @@
>>  #include <errno.h>
>>  #include <fdtdec.h>
>>  #include <malloc.h>
>> +#include <pch.h>
>>  #include <asm/lapic.h>
>>  #include <asm/pci.h>
>>  #include <asm/arch/bd82x6x.h>
>> @@ -116,6 +117,15 @@ int bd82x6x_init(void)
>
> Should this bd82x6x_init() be moved to init op of the pch driver?

That's a later patch.

>
>>         return 0;

[snip]

Re using get_sbase() properly, I'll send a v2 patch and see what you think.

Regards,
Simon