lantiq: add v3.9 support

[openwrt.git] / target / linux / lantiq / patches-3.9 / 0012-MIPS-lantiq-adds-minimal-dcdc-driver.patch

diff --git a/target/linux/lantiq/patches-3.9/0012-MIPS-lantiq-adds-minimal-dcdc-driver.patch b/target/linux/lantiq/patches-3.9/0012-MIPS-lantiq-adds-minimal-dcdc-driver.patch
new file mode 100644 (file)
index 0000000..b1813b3
--- /dev/null
+++ b/target/linux/lantiq/patches-3.9/0012-MIPS-lantiq-adds-minimal-dcdc-driver.patch
@@ -0,0 +1,106 @@
+From a810de459f90a62f5c1e27a2352b90318c5ef9a1 Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Wed, 5 Dec 2012 17:38:48 +0100
+Subject: [PATCH 12/22] MIPS: lantiq: adds minimal dcdc driver
+
+This driver so far only reads the core voltage.
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/mips/lantiq/xway/Makefile |    2 +-
+ arch/mips/lantiq/xway/dcdc.c   |   74 ++++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 75 insertions(+), 1 deletion(-)
+ create mode 100644 arch/mips/lantiq/xway/dcdc.c
+
+diff --git a/arch/mips/lantiq/xway/Makefile b/arch/mips/lantiq/xway/Makefile
+index 7a13660..087497d 100644
+--- a/arch/mips/lantiq/xway/Makefile
++++ b/arch/mips/lantiq/xway/Makefile
+@@ -1,3 +1,3 @@
+-obj-y := prom.o sysctrl.o clk.o reset.o dma.o gptu.o
++obj-y := prom.o sysctrl.o clk.o reset.o dma.o gptu.o dcdc.o
+ 
+ obj-$(CONFIG_XRX200_PHY_FW) += xrx200_phy_fw.o
+diff --git a/arch/mips/lantiq/xway/dcdc.c b/arch/mips/lantiq/xway/dcdc.c
+new file mode 100644
+index 0000000..8dd871a
+--- /dev/null
++++ b/arch/mips/lantiq/xway/dcdc.c
+@@ -0,0 +1,74 @@
++/*
++ *  This program is free software; you can redistribute it and/or modify it
++ *  under the terms of the GNU General Public License version 2 as published
++ *  by the Free Software Foundation.
++ *
++ *  Copyright (C) 2012 John Crispin <blogic@openwrt.org>
++ *  Copyright (C) 2010 Sameer Ahmad, Lantiq GmbH
++ */
++
++#include <linux/interrupt.h>
++#include <linux/ioport.h>
++#include <linux/module.h>
++#include <linux/of_platform.h>
++#include <linux/of_irq.h>
++
++#include <lantiq_soc.h>
++
++/* Bias and regulator Setup Register */
++#define DCDC_BIAS_VREG0       0xa
++/* Bias and regulator Setup Register */
++#define DCDC_BIAS_VREG1       0xb
++
++#define dcdc_w8(x, y) ltq_w8((x), dcdc_membase + (y))
++#define dcdc_r8(x)    ltq_r8(dcdc_membase + (x))
++
++static void __iomem *dcdc_membase;
++
++static int dcdc_probe(struct platform_device *pdev)
++{
++      struct resource *res;
++
++      res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++      if (!res) {
++              dev_err(&pdev->dev, "Failed to get resource\n");
++              return -ENOMEM;
++      }
++
++      /* remap dcdc register range */
++      dcdc_membase = devm_request_and_ioremap(&pdev->dev, res);
++      if (!dcdc_membase) {
++              dev_err(&pdev->dev, "Failed to remap resource\n");
++              return -ENOMEM;
++      }
++
++      dev_info(&pdev->dev, "Core Voltage : %d mV\n", dcdc_r8(DCDC_BIAS_VREG1) * 8);
++
++      return 0;
++}
++
++static const struct of_device_id dcdc_match[] = {
++      { .compatible = "lantiq,dcdc-xrx200" },
++      {},
++};
++MODULE_DEVICE_TABLE(of, dcdc_match);
++
++static struct platform_driver dcdc_driver = {
++      .probe = dcdc_probe,
++      .driver = {
++              .name = "dcdc-xrx200",
++              .owner = THIS_MODULE,
++              .of_match_table = dcdc_match,
++      },
++};
++
++int __init dcdc_init(void)
++{
++      int ret = platform_driver_register(&dcdc_driver);
++
++      if (ret)
++              pr_info("dcdc: Error registering platform driver\n");
++      return ret;
++}
++
++arch_initcall(dcdc_init);
+-- 
+1.7.10.4
+