spi: Convert CONFIG_DM_SPI* to CONFIG_$(SPL_TPL_)DM_SPI*

This change allows more fine tuning of driver model based SPI support in
SPL and TPL. It is now possible to explicitly enable/disable the DM_SPI
support in SPL and TPL via Kconfig option.

Before this change it was necessary to use:
    /* SPI Flash Configs */
    #if defined(CONFIG_SPL_BUILD)
    #undef CONFIG_DM_SPI
    #undef CONFIG_DM_SPI_FLASH
    #undef CONFIG_SPI_FLASH_MTD
    #endif

in the ./include/configs/<board>.h, which is error prone and shall be
avoided when we strive to switch to Kconfig.

The goal of this patch:

Provide distinction for DM_SPI support in both U-Boot proper and SPL (TPL).
Valid use case is when U-Boot proper wants to use DM_SPI, but SPL must
still support non DM driver.

Another use case is the conversion of non DM/DTS SPI driver to support
DM/DTS. When such driver needs to work in both SPL and U-Boot proper, the
distinction is needed in Kconfig (also if SPL version of the driver
supports OF_PLATDATA).

In the end of the day one would have to support following use cases (in
single driver file - e.g. mxs_spi.c):

- U-Boot proper driver supporting DT/DTS
- U-Boot proper driver without DT/DTS support (deprecated)
- SPL driver without DT/DTS support
- SPL (and TPL) driver with DT/DTS (when the SoC has enough resources to
  run full blown DT/DTS)
- SPL driver with DT/DTS and SPL_OF_PLATDATA (when one have constrained
  environment with no fitImage and OF_LIBFDT support).

Some boards do require SPI support (with DM) in SPL (TPL) and some only
have DM_SPI{_FLASH} defined to allow compiling SPL.

This patch converts #ifdef CONFIG_DM_SPI* to #if CONFIG_IS_ENABLED(DM_SPI)
and provides corresponding defines in Kconfig.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
Tested-by: Adam Ford <aford173@gmail.com> #da850-evm
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
[trini: Fixup a few platforms]
Signed-off-by: Tom Rini <trini@konsulko.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 3eae65ebc1..d09e52e88b 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -756,6 +756,11 @@ config SPL_DM_SPI
 	help
 	  Enable support for SPI DM drivers in SPL.
 
+config SPL_DM_SPI_FLASH
+	bool "Support SPI DM FLASH drivers in SPL"
+	help
+	  Enable support for SPI DM flash drivers in SPL.
+
 endif
 if SPL_UBI
 config SPL_UBI_LOAD_BY_VOLNAME
@@ -1092,6 +1097,11 @@ config SPL_SPI_FLASH_SFDP_SUPPORT
 	 SPI NOR flashes using Serial Flash Discoverable Parameters (SFDP)
 	 tables as per JESD216 standard in SPL.
 
+config SPL_SPI_FLASH_MTD
+	bool "Support for SPI flash MTD drivers in SPL"
+	help
+	  Enable support for SPI flash MTD drivers in SPL.
+
 config SPL_SPI_LOAD
 	bool "Support loading from SPI flash"
 	help
@@ -1499,6 +1509,16 @@ config TPL_SPI_SUPPORT
 	  Enable support for using SPI in TPL. See SPL_SPI_SUPPORT for
 	  details.
 
+config TPL_DM_SPI
+	bool "Support SPI DM drivers in TPL"
+	help
+	  Enable support for SPI DM drivers in TPL.
+
+config TPL_DM_SPI_FLASH
+	bool "Support SPI DM FLASH drivers in TPL"
+	help
+	  Enable support for SPI DM flash drivers in TPL.
+
 config TPL_YMODEM_SUPPORT
 	bool "Support loading using Ymodem"
 	depends on TPL_SERIAL_SUPPORT