Commit 6e7674c3 authored by Lukasz Luba's avatar Lukasz Luba Committed by Krzysztof Kozlowski
Browse files

memory: Add DMC driver for Exynos5422 



Add driver for Exynos5422 Dynamic Memory Controller.  The driver
provides support for dynamic frequency and voltage scaling for DMC and
DRAM.  It supports changing timings of DRAM running with different
frequency.  There is also an algorithm to calculate timings based on
memory description provided in DT.

Signed-off-by: default avatarLukasz Luba <l.luba@partner.samsung.com>
Signed-off-by: default avatarKrzysztof Kozlowski <krzk@kernel.org>
parent 976897dd

MAINTAINERS

+8 −0
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@@ -4969,6 +4969,14 @@ F: include/linux/dma-direct.h 
F:	include/linux/dma-mapping.h

F:	include/linux/dma-noncoherent.h









DMC FREQUENCY DRIVER FOR SAMSUNG EXYNOS5422









M:	Lukasz Luba <l.luba@partner.samsung.com>









L:	linux-pm@vger.kernel.org









L:	linux-samsung-soc@vger.kernel.org









S:	Maintained









F:	drivers/memory/samsung/exynos5422-dmc.c









F:	Documentation/devicetree/bindings/memory-controllers/exynos5422-dmc.txt

















DME1737 HARDWARE MONITOR DRIVER









M:	Juerg Haefliger <juergh@gmail.com>









L:	linux-hwmon@vger.kernel.org
































drivers/memory/samsung/Kconfig



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@@ -7,6 +7,19 @@ config SAMSUNG_MC

















if SAMSUNG_MC



















config EXYNOS5422_DMC









	tristate "EXYNOS5422 Dynamic Memory Controller driver"









	depends on ARCH_EXYNOS || (COMPILE_TEST && HAS_IOMEM)









	select DDR









	depends on DEVFREQ_GOV_SIMPLE_ONDEMAND









	depends on (PM_DEVFREQ && PM_DEVFREQ_EVENT)









	help









	  This adds driver for Exynos5422 DMC (Dynamic Memory Controller).









	  The driver provides support for Dynamic Voltage and Frequency Scaling in









	  DMC and DRAM. It also supports changing timings of DRAM running with









	  different frequency. The timings are calculated based on DT memory









	  information.



















config EXYNOS_SROM









	bool "Exynos SROM controller driver" if COMPILE_TEST









	depends on (ARM && ARCH_EXYNOS) || (COMPILE_TEST && HAS_IOMEM)
































drivers/memory/samsung/Makefile



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# SPDX-License-Identifier: GPL-2.0









obj-$(CONFIG_EXYNOS5422_DMC)	+= exynos5422-dmc.o









obj-$(CONFIG_EXYNOS_SROM)	+= exynos-srom.o
























drivers/memory/samsung/exynos5422-dmc.c
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