openwrt/target/linux/bcm53xx/patches-3.14/112-bcm53xx-sprom-add-sprom-driver.patch

From 4e0ab3269a6d260a41a3673157753147f5f71341 Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Sun, 4 May 2014 13:19:20 +0200
Subject: [PATCH 03/17] bcm47xx-sprom: add Broadcom sprom parser driver

This driver needs an nvram driver and fetches the sprom values from the
nvram and provides it to any other driver. The calibration data for the
wifi chip the mac address and some more board description data is
stores in the sprom.

This is based on a copy of arch/mips/bcm47xx/sprom.c and my plan is to
make the bcm47xx MIPS SoCs also use this driver some time later.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
 .../devicetree/bindings/misc/bcm47xx-sprom.txt     |  16 +
 drivers/misc/Kconfig                               |  11 +
 drivers/misc/Makefile                              |   1 +
 drivers/misc/bcm47xx-sprom.c                       | 690 +++++++++++++++++++++
 4 files changed, 718 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/misc/bcm47xx-sprom.txt
 create mode 100644 drivers/misc/bcm47xx-sprom.c

--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/bcm47xx-sprom.txt
@@ -0,0 +1,16 @@
+Broadcom bcm47xx/bcm53xx sprom converter
+
+This driver provbides an sprom based on a given nvram.
+
+Required properties:
+
+- compatible : brcm,bcm47xx-sprom
+
+- nvram : reference to a nvram driver, e.g. bcm47xx-nvram
+
+Example:
+
+sprom0: sprom@0 {
+	compatible = "brcm,bcm47xx-sprom";
+	nvram = <&nvram0>;
+};
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -515,6 +515,17 @@ config SRAM
 	  the genalloc API. It is supposed to be used for small on-chip SRAM
 	  areas found on many SoCs.
 
+config BCM47XX_SPROM
+	tristate "BCM47XX sprom driver"
+	help
+	  This driver parses the sprom from a given nvram which is found on
+	  Broadcom bcm47xx and bcm53xx SoCs.
+
+	  The sprom contains board configuration data like the
+	  calibration data fro the wifi chips, the mac addresses used
+	  by the board and many other board configuration data. This
+	  driver will provide the sprom to bcma.
+
 source "drivers/misc/c2port/Kconfig"
 source "drivers/misc/eeprom/Kconfig"
 source "drivers/misc/cb710/Kconfig"
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -54,3 +54,4 @@ obj-$(CONFIG_LATTICE_ECP3_CONFIG)	+= lat
 obj-$(CONFIG_SRAM)		+= sram.o
 obj-y				+= mic/
 obj-$(CONFIG_GENWQE)		+= genwqe/
+obj-$(CONFIG_BCM47XX_SPROM)	+= bcm47xx-sprom.o