linux-imx (2.6.35.3): Enable cpufreq support for i.MX28 EVK

The DDR2 initialization code has been fixed in U-Boot so the kernel
does not hang when cpufreq support is enabled.

Change-Id: Ieb5d74c621bf446df08c9063755f15f26bab02b2
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

diff --git a/meta-fsl-arm/recipes-kernel/linux/linux-imx-2.6.35.3/imx28evk/defconfig b/meta-fsl-arm/recipes-kernel/linux/linux-imx-2.6.35.3/imx28evk/defconfig
index 118e9d2751aa7282fc1f8b64ef0fbf31eebb6e9f..dbb4eaa60b3d8f226f68977cf547f7b74557737e 100644 (file)
--- a/meta-fsl-arm/recipes-kernel/linux/linux-imx-2.6.35.3/imx28evk/defconfig
+++ b/meta-fsl-arm/recipes-kernel/linux/linux-imx-2.6.35.3/imx28evk/defconfig
@@ -18,7 +18,7 @@ CONFIG_TRACE_IRQFLAGS_SUPPORT=y
 CONFIG_HARDIRQS_SW_RESEND=y
 CONFIG_GENERIC_IRQ_PROBE=y
 CONFIG_RWSEM_GENERIC_SPINLOCK=y
-# CONFIG_ARCH_HAS_CPUFREQ is not set
+CONFIG_ARCH_HAS_CPUFREQ=y
 CONFIG_GENERIC_HWEIGHT=y
 CONFIG_GENERIC_CALIBRATE_DELAY=y
 CONFIG_ZONE_DMA=y

diff --git a/meta-fsl-arm/recipes-kernel/linux/linux-imx-2.6.35.3/mx28-removecpufreq.patch b/meta-fsl-arm/recipes-kernel/linux/linux-imx-2.6.35.3/mx28-removecpufreq.patch
deleted file mode 100644 (file)
index 0b7134b..0000000
--- a/meta-fsl-arm/recipes-kernel/linux/linux-imx-2.6.35.3/mx28-removecpufreq.patch
+++ /dev/null
@@ -1,79 +0,0 @@
-From 7b781d1a67486a2ae50c174731ca1daebf381ab4 Mon Sep 17 00:00:00 2001
-From: Fabio Estevam <festevam@gmail.com>
-Date: Fri, 23 Mar 2012 13:13:49 -0300
-Subject: [PATCH] ARM: mx28: Remove CPUFREQ support
-
-When using CPUFREQ driver with the mainline U-boot, the kernel hangs.
-
-Remove CPUFREQ support for now.
-
-Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
----
- arch/arm/configs/imx28evk_defconfig |    1 -
- arch/arm/plat-mxs/Kconfig           |    2 --
- arch/arm/plat-mxs/clock.c           |   10 ----------
- 3 files changed, 0 insertions(+), 13 deletions(-)
-
-diff --git a/arch/arm/configs/imx28evk_defconfig b/arch/arm/configs/imx28evk_defconfig
-index 08f6a18..0c8bc66 100644
---- a/arch/arm/configs/imx28evk_defconfig
-+++ b/arch/arm/configs/imx28evk_defconfig
-@@ -18,7 +18,6 @@ CONFIG_TRACE_IRQFLAGS_SUPPORT=y
- CONFIG_HARDIRQS_SW_RESEND=y
- CONFIG_GENERIC_IRQ_PROBE=y
- CONFIG_RWSEM_GENERIC_SPINLOCK=y
--CONFIG_ARCH_HAS_CPUFREQ=y
- CONFIG_GENERIC_HWEIGHT=y
- CONFIG_GENERIC_CALIBRATE_DELAY=y
- CONFIG_ZONE_DMA=y
-diff --git a/arch/arm/plat-mxs/Kconfig b/arch/arm/plat-mxs/Kconfig
-index 831a24b..63768f8 100644
---- a/arch/arm/plat-mxs/Kconfig
-+++ b/arch/arm/plat-mxs/Kconfig
-@@ -13,7 +13,6 @@ config ARCH_MX28
-       select MXS_ICOLL
-       select MXS_DMA_ENGINE
-       select MXS_AUART_DMA_SUPPORT
--      select ARCH_HAS_CPUFREQ
-       ---help---
-        Support Freescale MX28 chips
- 
-@@ -25,7 +24,6 @@ config ARCH_MX23
-       select MXS_ICOLL
-       select MXS_DMA_ENGINE
-       select MXS_AUART_DMA_SUPPORT
--      select ARCH_HAS_CPUFREQ
-       ---help---
-       Support Freescale MX23 chips
- 
-diff --git a/arch/arm/plat-mxs/clock.c b/arch/arm/plat-mxs/clock.c
-index 1b98b1e..3ce7953 100644
---- a/arch/arm/plat-mxs/clock.c
-+++ b/arch/arm/plat-mxs/clock.c
-@@ -119,11 +119,6 @@ int clk_enable(struct clk *clk)
- 
-       ret = __clk_enable(clk);
-       spin_unlock_irqrestore(&clockfw_lock, flags);
--      if ((clk->flags & CPU_FREQ_TRIG_UPDATE)
--          && (pre_usage == 0)) {
--              cpufreq_trig_needed = 1;
--              cpufreq_update_policy(0);
--      }
-       return ret;
- }
- EXPORT_SYMBOL(clk_enable);
-@@ -139,11 +134,6 @@ void clk_disable(struct clk *clk)
-       spin_lock_irqsave(&clockfw_lock, flags);
-       __clk_disable(clk);
-       spin_unlock_irqrestore(&clockfw_lock, flags);
--      if ((clk->flags & CPU_FREQ_TRIG_UPDATE)
--                      && ((clk->ref & CLK_EN_MASK) == 0)) {
--              cpufreq_trig_needed = 1;
--              cpufreq_update_policy(0);
--      }
- }
- EXPORT_SYMBOL(clk_disable);
- 
--- 
-1.7.1
-

diff --git a/meta-fsl-arm/recipes-kernel/linux/linux-imx_2.6.35.3.bb b/meta-fsl-arm/recipes-kernel/linux/linux-imx_2.6.35.3.bb
index 98b3d936045fdc0673e5fb34724c8de586c1623d..54a20c61a351caa3fd7276368c0322845d03b334 100644 (file)
--- a/meta-fsl-arm/recipes-kernel/linux/linux-imx_2.6.35.3.bb
+++ b/meta-fsl-arm/recipes-kernel/linux/linux-imx_2.6.35.3.bb
@@ -1,7 +1,7 @@
 # Copyright (C) 2011-2012 Freescale Semiconductor
 # Released under the MIT license (see COPYING.MIT for the terms)
 
-PR = "${INC_PR}.20"
+PR = "${INC_PR}.21"
 
 include linux-imx.inc
 
@@ -20,6 +20,5 @@ SRC_URI += "file://NFS-Fix-nfsroot-support.patch \
 "
 
 SRC_URI_append_mxs = " \
-           file://mx28-removecpufreq.patch \
            file://mxs-duart-use-ttyAMA-for-device-name.patch \
 "