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authorJohn Crispin <john@openwrt.org>2015-12-10 19:06:32 +0000
committerJohn Crispin <john@openwrt.org>2015-12-10 19:06:32 +0000
commit6df4426245be87148d6aa75859951cb6351eb24c (patch)
tree57a361566f8a505f89b685125d9ab36bba289e19 /target/linux/ramips/patches-4.3/0008-MIPS-ralink-mt7620-fix-usb-issue-during-frequency-sc.patch
parentf2b0ae86983705c98a50ae845403e67c9c412f4d (diff)
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ralink: bump to the target to v4.3
Signed-off-by: John Crispin <blogic@openwrt.org> SVN-Revision: 47831
Diffstat (limited to 'target/linux/ramips/patches-4.3/0008-MIPS-ralink-mt7620-fix-usb-issue-during-frequency-sc.patch')
-rw-r--r--target/linux/ramips/patches-4.3/0008-MIPS-ralink-mt7620-fix-usb-issue-during-frequency-sc.patch57
1 files changed, 57 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-4.3/0008-MIPS-ralink-mt7620-fix-usb-issue-during-frequency-sc.patch b/target/linux/ramips/patches-4.3/0008-MIPS-ralink-mt7620-fix-usb-issue-during-frequency-sc.patch
new file mode 100644
index 0000000000..6fa90f245e
--- /dev/null
+++ b/target/linux/ramips/patches-4.3/0008-MIPS-ralink-mt7620-fix-usb-issue-during-frequency-sc.patch
@@ -0,0 +1,57 @@
+From 0fd52df8bce3be9edbc195b120bc9a68f970d9e5 Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Mon, 4 Aug 2014 20:43:25 +0200
+Subject: [PATCH 08/53] MIPS: ralink: mt7620: fix usb issue during frequency
+ scaling
+
+ If the USB HCD is running and the cpu is scaled too low, then the USB stops
+ working. Increase the idle speed of the core to fix this if the kernel is
+ built with USB support.
+
+ The values are taken from the Ralink SDK Kernel.
+
+ Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/mips/ralink/mt7620.c | 19 +++++++++++++++++++
+ 1 file changed, 19 insertions(+)
+
+diff --git a/arch/mips/ralink/mt7620.c b/arch/mips/ralink/mt7620.c
+index 2ea5ff6..33a7e42 100644
+--- a/arch/mips/ralink/mt7620.c
++++ b/arch/mips/ralink/mt7620.c
+@@ -40,6 +40,12 @@
+ /* is this a MT7620 or a MT7628 */
+ enum mt762x_soc_type mt762x_soc;
+
++/* clock scaling */
++#define CLKCFG_FDIV_MASK 0x1f00
++#define CLKCFG_FDIV_USB_VAL 0x0300
++#define CLKCFG_FFRAC_MASK 0x001f
++#define CLKCFG_FFRAC_USB_VAL 0x0003
++
+ /* does the board have sdram or ddram */
+ static int dram_type;
+
+@@ -423,6 +429,19 @@ void __init ralink_clk_init(void)
+ ralink_clk_add("10000b00.spi", sys_rate);
+ ralink_clk_add("10000c00.uartlite", periph_rate);
+ ralink_clk_add("10180000.wmac", xtal_rate);
++
++ if (IS_ENABLED(CONFIG_USB)) {
++ /*
++ * When the CPU goes into sleep mode, the BUS clock will be too low for
++ * USB to function properly
++ */
++ u32 val = rt_sysc_r32(SYSC_REG_CPU_SYS_CLKCFG);
++
++ val &= ~(CLKCFG_FDIV_MASK | CLKCFG_FFRAC_MASK);
++ val |= CLKCFG_FDIV_USB_VAL | CLKCFG_FFRAC_USB_VAL;
++
++ rt_sysc_w32(val, SYSC_REG_CPU_SYS_CLKCFG);
++ }
+ }
+
+ void __init ralink_of_remap(void)
+--
+1.7.10.4
+