ARM: 7758/1: introduce config HAS_BANDGAP

Bandgap is a device used to measure temperature on electronic
equipments.  It is widely used in digital integrated circuits.  It is
based on the dependency between silicon voltage and temperature.

This patch introduce HAS_BANDGAP config entry.  This config is a boolean
value so that arch code can flag if they feature a bandgap device.

This config entry follows the same idea behind ARCH_HAS_CPUFREQ.

Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-omap@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Fabio Stevam <festevam@gmail.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Amit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index d423d58..bcbdec9 100644 (file)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -174,6 +174,9 @@ config ARCH_HAS_CPUFREQ
          and that the relevant menu configurations are displayed for
          it.
 
+config ARCH_HAS_BANDGAP
+       bool
+
 config GENERIC_HWEIGHT
        bool
        default y

diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index f49cd51..8620ab5 100644 (file)
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -4,6 +4,7 @@ config ARCH_OMAP
 config ARCH_OMAP2PLUS
        bool "TI OMAP2/3/4/5 SoCs with device tree support" if (ARCH_MULTI_V6 || ARCH_MULTI_V7)
        select ARCH_HAS_CPUFREQ
+       select ARCH_HAS_BANDGAP
        select ARCH_HAS_HOLES_MEMORYMODEL
        select ARCH_OMAP
        select ARCH_REQUIRE_GPIOLIB