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IMX: Add 352Mhz patch

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This commit is contained in:
fritsch 2015-02-16 22:05:52 +01:00 committed by Stephan Raue
parent fe56b14dbc
commit bc5f24d05d
2 changed files with 77 additions and 1 deletions
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2
projects/imx6/linux/linux.arm.conf
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@ -3388,7 +3388,7 @@ CONFIG_MXC_ASRC=y
#
CONFIG_MXC_VPU=y
# CONFIG_MXC_VPU_DEBUG is not set
# CONFIG_MX6_VPU_352M is not set
CONFIG_MX6_VPU_352M=y
#
# MXC HDMI CEC (Consumer Electronics Control) support

76
projects/imx6/patches/linux/linux-999-3.14-vpu352.patch Normal file
View File

@ -0,0 +1,76 @@
diff -ruN linux-cuboxi-3.14-dc5edb8-original/arch/arm/mach-imx/busfreq-imx6.c linux-cuboxi-3.14-dc5edb8/arch/arm/mach-imx/busfreq-imx6.c
--- linux-cuboxi-3.14-dc5edb8-original/arch/arm/mach-imx/busfreq-imx6.c 2015-02-16 21:54:12.298970658 +0100
+++ linux-cuboxi-3.14-dc5edb8/arch/arm/mach-imx/busfreq-imx6.c 2015-02-16 21:55:33.370972180 +0100
@@ -925,11 +925,12 @@
static int __init busfreq_init(void)
{
+#ifndef CONFIG_MX6_VPU_352M
if (platform_driver_register(&busfreq_driver) != 0)
return -ENODEV;
printk(KERN_INFO "Bus freq driver module loaded\n");
-
+#endif
return 0;
}
diff -ruN linux-cuboxi-3.14-dc5edb8-original/arch/arm/mach-imx/clk-imx6q.c linux-cuboxi-3.14-dc5edb8/arch/arm/mach-imx/clk-imx6q.c
--- linux-cuboxi-3.14-dc5edb8-original/arch/arm/mach-imx/clk-imx6q.c 2015-02-16 21:54:12.306970658 +0100
+++ linux-cuboxi-3.14-dc5edb8/arch/arm/mach-imx/clk-imx6q.c 2015-02-16 21:54:53.978971440 +0100
@@ -713,6 +713,22 @@
/* Set pll4_audio to a value that can derive 5K-88.2KHz and 8K-96KHz */
clk_set_rate(clk[pll4_audio_div], 541900800);
+#ifdef CONFIG_MX6_VPU_352M
+ /*
+ * If VPU 352M is enabled, then PLL2_PDF2 need to be
+ * set to 352M, cpufreq will be disabled as VDDSOC/PU
+ * need to be at highest voltage, scaling cpu freq is
+ * not saving any power, and busfreq will be also disabled
+ * as the PLL2_PFD2 is not at default freq, in a word,
+ * all modules that sourceing clk from PLL2_PFD2 will
+ * be impacted.
+ */
+ clk_set_rate(clk[pll2_pfd2_396m], 352000000);
+ clk_set_parent(clk[vpu_axi_sel], clk[pll2_pfd2_396m]);
+ pr_info("VPU 352M is enabled!\n");
+#endif
+
+
/* Set initial power mode */
imx6q_set_lpm(WAIT_CLOCKED);
diff -ruN linux-cuboxi-3.14-dc5edb8-original/arch/arm/mach-imx/mach-imx6q.c linux-cuboxi-3.14-dc5edb8/arch/arm/mach-imx/mach-imx6q.c
--- linux-cuboxi-3.14-dc5edb8-original/arch/arm/mach-imx/mach-imx6q.c 2015-02-16 21:54:12.278970657 +0100
+++ linux-cuboxi-3.14-dc5edb8/arch/arm/mach-imx/mach-imx6q.c 2015-02-16 21:55:13.970971815 +0100
@@ -364,6 +364,12 @@
if (dev_pm_opp_disable(cpu_dev, 852000000))
pr_warn("failed to disable 850 MHz OPP\n");
}
+ if (IS_ENABLED(CONFIG_MX6_VPU_352M)) {
+ if (dev_pm_opp_disable(cpu_dev, 396000000)) {
+ pr_warn("failed to disable 396MHz OPP\n");
+ pr_info("remove 396MHz OPP for VPU running at 352MHz!\n");
+ }
+ }
put_node:
of_node_put(np);
diff -ruN linux-cuboxi-3.14-dc5edb8-original/drivers/cpufreq/imx6-cpufreq.c linux-cuboxi-3.14-dc5edb8/drivers/cpufreq/imx6-cpufreq.c
--- linux-cuboxi-3.14-dc5edb8-original/drivers/cpufreq/imx6-cpufreq.c 2015-02-16 21:54:09.350970602 +0100
+++ linux-cuboxi-3.14-dc5edb8/drivers/cpufreq/imx6-cpufreq.c 2015-02-16 21:55:49.778972488 +0100
@@ -305,6 +305,13 @@
unsigned long volt = be32_to_cpup(val++);
if (freq_table[j].frequency == freq) {
imx6_soc_volt[soc_opp_count++] = volt;
+#ifdef CONFIG_MX6_VPU_352M
+ if (freq == 792000) {
+ pr_info("increase SOC/PU voltage for VPU352MHz\n");
+ imx6_soc_volt[soc_opp_count-1] = 1250000;
+ }
+#endif
+
break;
}
}