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>

2 files changed, 5 insertions, 5 deletions

diff --git a/include/spi.h b/include/spi.h
index 5cc6d6e008..9b4fb8dc0b 100644
--- a/include/spi.h
+++ b/include/spi.h
@@ -39,7 +39,7 @@
 
 #define SPI_DEFAULT_WORDLEN	8
 
-#ifdef CONFIG_DM_SPI
+#if CONFIG_IS_ENABLED(DM_SPI)
 /* TODO(sjg@chromium.org): Remove this and use max_hz from struct spi_slave */
 struct dm_spi_bus {
 	uint max_hz;
@@ -131,7 +131,7 @@ enum spi_polarity {
  * @flags:		Indication of SPI flags.
  */
 struct spi_slave {
-#ifdef CONFIG_DM_SPI
+#if CONFIG_IS_ENABLED(DM_SPI)
 	struct udevice *dev;	/* struct spi_slave is dev->parentdata */
 	uint max_hz;
 	uint speed;
@@ -317,7 +317,7 @@ void spi_flash_copy_mmap(void *data, void *offset, size_t len);
  */
 int spi_cs_is_valid(unsigned int bus, unsigned int cs);
 
-#ifndef CONFIG_DM_SPI
+#if !CONFIG_IS_ENABLED(DM_SPI)
 /**
  * Activate a SPI chipselect.
  * This function is provided by the board code when using a driver
@@ -367,7 +367,7 @@ static inline int spi_w8r8(struct spi_slave *slave, unsigned char byte)
 	return ret < 0 ? ret : din[1];
 }
 
-#ifdef CONFIG_DM_SPI
+#if CONFIG_IS_ENABLED(DM_SPI)
 
 /**
  * struct spi_cs_info - Information about a bus chip select
diff --git a/include/spi_flash.h b/include/spi_flash.h
index d9b2af856c..b336619487 100644
--- a/include/spi_flash.h
+++ b/include/spi_flash.h
@@ -39,7 +39,7 @@ struct dm_spi_flash_ops {
 /* Access the serial operations for a device */
 #define sf_get_ops(dev) ((struct dm_spi_flash_ops *)(dev)->driver->ops)
 
-#ifdef CONFIG_DM_SPI_FLASH
+#if CONFIG_IS_ENABLED(DM_SPI_FLASH)
 /**
  * spi_flash_read_dm() - Read data from SPI flash
  *