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memory: Add DMC driver for Exynos5422

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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: Lukasz Luba <l.luba@partner.samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
This commit is contained in:
Lukasz Luba 2019-08-21 12:43:00 +02:00 committed by Krzysztof Kozlowski
parent 976897dd96
commit 6e7674c3c6
4 changed files with 1279 additions and 0 deletions
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8
MAINTAINERS
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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

13
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)

1
drivers/memory/samsung/Makefile
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@ -1,2 +1,3 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_EXYNOS5422_DMC) += exynos5422-dmc.o
obj-$(CONFIG_EXYNOS_SROM) += exynos-srom.o

1257
drivers/memory/samsung/exynos5422-dmc.c Normal file
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