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Commit 3d0b16a6 authored by Maxime Ripard's avatar Maxime Ripard Committed by Greg Kroah-Hartman
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nvmem: sunxi: Move the SID driver to the nvmem framework 



Now that we have the nvmem framework, we can consolidate the common
driver code. Move the driver to the framework, and hopefully, it will
fix the sysfs file creation race.

Signed-off-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
[srinivas.kandagatla: Moved to regmap based EEPROM framework]
Signed-off-by: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Tested-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
Tested-by: default avatarRajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b470d6d7

Documentation/ABI/testing/sysfs-driver-sunxi-sid

deleted100644 → 0
+0 −22
Original line number Diff line number Diff line 
What:		/sys/devices/*/<our-device>/eeprom

Date:		August 2013

Contact:	Oliver Schinagl <oliver@schinagl.nl>

Description:	read-only access to the SID (Security-ID) on current

		A-series SoC's from Allwinner. Currently supports A10, A10s, A13

		and A20 CPU's. The earlier A1x series of SoCs exports 16 bytes,

		whereas the newer A20 SoC exposes 512 bytes split into sections.

		Besides the 16 bytes of SID, there's also an SJTAG area,

		HDMI-HDCP key and some custom keys. Below a quick overview, for

		details see the user manual:

		0x000  128 bit root-key (sun[457]i)

		0x010  128 bit boot-key (sun7i)

		0x020   64 bit security-jtag-key (sun7i)

		0x028   16 bit key configuration (sun7i)

		0x02b   16 bit custom-vendor-key (sun7i)

		0x02c  320 bit low general key (sun7i)

		0x040   32 bit read-control access (sun7i)

		0x064  224 bit low general key (sun7i)

		0x080 2304 bit HDCP-key (sun7i)

		0x1a0  768 bit high general key (sun7i)

Users:		any user space application which wants to read the SID on

		Allwinner's A-series of CPU's.

Documentation/devicetree/bindings/misc/allwinner,sunxi-sid.txt→Documentation/devicetree/bindings/nvmem/allwinner,sunxi-sid.txt

+4 −0
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@@ -4,6 +4,10 @@ Required properties: 
- compatible: "allwinner,sun4i-a10-sid" or "allwinner,sun7i-a20-sid"

- reg: Should contain registers location and length



= Data cells =

Are child nodes of qfprom, bindings of which as described in

bindings/nvmem/nvmem.txt



Example for sun4i:

	sid@01c23800 {

		compatible = "allwinner,sun4i-a10-sid";

drivers/misc/eeprom/Kconfig

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@@ -96,17 +96,4 @@ config EEPROM_DIGSY_MTC_CFG 


	  If unsure, say N.



config EEPROM_SUNXI_SID

	tristate "Allwinner sunxi security ID support"

	depends on ARCH_SUNXI && SYSFS

	help

	  This is a driver for the 'security ID' available on various Allwinner

	  devices.



	  Due to the potential risks involved with changing e-fuses,

	  this driver is read-only.



	  This driver can also be built as a module. If so, the module

	  will be called sunxi_sid.



endmenu

drivers/misc/eeprom/Makefile

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@@ -4,5 +4,4 @@ obj-$(CONFIG_EEPROM_LEGACY) += eeprom.o 
obj-$(CONFIG_EEPROM_MAX6875)	+= max6875.o

obj-$(CONFIG_EEPROM_93CX6)	+= eeprom_93cx6.o

obj-$(CONFIG_EEPROM_93XX46)	+= eeprom_93xx46.o

obj-$(CONFIG_EEPROM_SUNXI_SID)	+= sunxi_sid.o

obj-$(CONFIG_EEPROM_DIGSY_MTC_CFG) += digsy_mtc_eeprom.o

drivers/nvmem/Kconfig

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@@ -25,4 +25,15 @@ config QCOM_QFPROM 
	  This driver can also be built as a module. If so, the module

	  will be called nvmem_qfprom.



config NVMEM_SUNXI_SID

	tristate "Allwinner SoCs SID support"

	depends on ARCH_SUNXI

	select REGMAP_MMIO

	help

	  This is a driver for the 'security ID' available on various Allwinner

	  devices.



	  This driver can also be built as a module. If so, the module

	  will be called nvmem_sunxi_sid.



endif