dm: Expand and complete Kconfig in drivers/
Expand the help messages for each driver. Add missing Kconfig for I2C,
SPI flash and thermal.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/drivers/Kconfig b/drivers/Kconfig
index 021293e..dcce532 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -50,4 +50,6 @@
source "drivers/crypto/Kconfig"
+source "drivers/thermal/Kconfig"
+
endmenu
diff --git a/drivers/core/Kconfig b/drivers/core/Kconfig
index d2799dc..dc32385 100644
--- a/drivers/core/Kconfig
+++ b/drivers/core/Kconfig
@@ -2,5 +2,7 @@
bool "Enable Driver Model"
depends on !SPL_BUILD
help
- This config option enables Driver Model.
- To use legacy drivers, say N.
+ This config option enables Driver Model. This brings in the core
+ support, including scanning of platform data on start-up. If
+ CONFIG_OF_CONTROL is enabled, the device tree will be scanned also
+ when available.
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index d21302f..b609e73 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -2,5 +2,8 @@
bool "Enable Driver Model for GPIO drivers"
depends on DM
help
- If you want to use driver model for GPIO drivers, say Y.
- To use legacy GPIO drivers, say N.
+ Enable driver model for GPIO access. The standard GPIO
+ interface (gpio_get_value(), etc.) is then implemented by
+ the GPIO uclass. Drivers provide methods to query the
+ particular GPIOs that they provide. The uclass interface
+ is defined in include/asm-generic/gpio.h.
diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig
index 202ea5d..2cc776c 100644
--- a/drivers/i2c/Kconfig
+++ b/drivers/i2c/Kconfig
@@ -2,8 +2,16 @@
bool "Enable Driver Model for I2C drivers"
depends on DM
help
- If you want to use driver model for I2C drivers, say Y.
- To use legacy I2C drivers, say N.
+ Enable driver model for I2C. This SPI flash interface
+ (spi_flash_probe(), spi_flash_write(), etc.) is then
+ implemented by the SPI flash uclass. There is one standard
+ SPI flash driver which knows how to probe most chips
+ supported by U-Boot. The uclass interface is defined in
+ include/spi_flash.h, but is currently fully compatible
+ with the old interface to avoid confusion and duplication
+ during the transition parent. SPI and SPI flash must be
+ enabled together (it is not possible to use driver model
+ for one and not the other).
config SYS_I2C_UNIPHIER
bool "UniPhier I2C driver"
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index e69de29..813d1c2 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -0,0 +1,9 @@
+config DM_CROS_EC
+ bool "Enable Driver Model for Chrome OS EC"
+ depends on DM
+ help
+ Enable driver model for the Chrome OS EC interface. This
+ allows the cros_ec SPI driver to operate with CONFIG_DM_SPI
+ but otherwise makes few changes. Since cros_ec also supports
+ I2C and LPC (which don't support driver model yet), a full
+ conversion is not yet possible.
diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig
index 415ab4e..59278d1 100644
--- a/drivers/mtd/Kconfig
+++ b/drivers/mtd/Kconfig
@@ -1 +1,3 @@
source "drivers/mtd/nand/Kconfig"
+
+source "drivers/mtd/spi/Kconfig"
diff --git a/drivers/mtd/spi/Kconfig b/drivers/mtd/spi/Kconfig
new file mode 100644
index 0000000..2dc46b4
--- /dev/null
+++ b/drivers/mtd/spi/Kconfig
@@ -0,0 +1,14 @@
+config DM_SPI_FLASH
+ bool "Enable Driver Model for SPI flash"
+ depends on DM && SPI
+ help
+ Enable driver model for SPI flash. This SPI flash interface
+ (spi_flash_probe(), spi_flash_write(), etc.) is then
+ implemented by the SPI flash uclass. There is one standard
+ SPI flash driver which knows how to probe most chips
+ supported by U-Boot. The uclass interface is defined in
+ include/spi_flash.h, but is currently fully compatible
+ with the old interface to avoid confusion and duplication
+ during the transition parent. SPI and SPI flash must be
+ enabled together (it is not possible to use driver model
+ for one and not the other).
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index a0b6e02..c94353b 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -2,8 +2,10 @@
bool "Enable Driver Model for serial drivers"
depends on DM
help
- If you want to use driver model for serial drivers, say Y.
- To use legacy serial drivers, say N.
+ Enable driver model for serial. This replaces
+ drivers/serial/serial.c with the serial uclass, which
+ implements serial_putc() etc. The uclass interface is
+ defined in include/serial.h.
config UNIPHIER_SERIAL
bool "UniPhier on-chip UART support"
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index e1678e6..7ae2727 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -2,5 +2,11 @@
bool "Enable Driver Model for SPI drivers"
depends on DM
help
- If you want to use driver model for SPI drivers, say Y.
- To use legacy SPI drivers, say N.
+ Enable driver model for SPI. The SPI slave interface
+ (spi_setup_slave(), spi_xfer(), etc.) is then implemented by
+ the SPI uclass. Drivers provide methods to access the SPI
+ buses that they control. The uclass interface is defined in
+ include/spi.h. The existing spi_slave structure is attached
+ as 'parent data' to every slave on each bus. Slaves
+ typically use driver-private data instead of extending the
+ spi_slave structure.
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
new file mode 100644
index 0000000..3c6b36d
--- /dev/null
+++ b/drivers/thermal/Kconfig
@@ -0,0 +1,7 @@
+config DM_THERMAL
+ bool "Driver support for thermal devices"
+ help
+ Enable support for temporary-sensing devices. Some SoCs have on-chip
+ temperature sensors to permit warnings, speed throttling or even
+ automatic power-off when the temperature gets too high or low. Other
+ devices may be discrete but connected on a suitable bus.