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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/arm/mach-cns3xxx/pm.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/arm/mach-cns3xxx/pm.c')
-rw-r--r--kernel/arch/arm/mach-cns3xxx/pm.c123
1 files changed, 123 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-cns3xxx/pm.c b/kernel/arch/arm/mach-cns3xxx/pm.c
new file mode 100644
index 000000000..f46b78dd6
--- /dev/null
+++ b/kernel/arch/arm/mach-cns3xxx/pm.c
@@ -0,0 +1,123 @@
+/*
+ * Copyright 2008 Cavium Networks
+ *
+ * This file 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.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/atomic.h>
+#include "cns3xxx.h"
+#include "pm.h"
+#include "core.h"
+
+void cns3xxx_pwr_clk_en(unsigned int block)
+{
+ u32 reg = __raw_readl(PM_CLK_GATE_REG);
+
+ reg |= (block & PM_CLK_GATE_REG_MASK);
+ __raw_writel(reg, PM_CLK_GATE_REG);
+}
+EXPORT_SYMBOL(cns3xxx_pwr_clk_en);
+
+void cns3xxx_pwr_clk_dis(unsigned int block)
+{
+ u32 reg = __raw_readl(PM_CLK_GATE_REG);
+
+ reg &= ~(block & PM_CLK_GATE_REG_MASK);
+ __raw_writel(reg, PM_CLK_GATE_REG);
+}
+EXPORT_SYMBOL(cns3xxx_pwr_clk_dis);
+
+void cns3xxx_pwr_power_up(unsigned int block)
+{
+ u32 reg = __raw_readl(PM_PLL_HM_PD_CTRL_REG);
+
+ reg &= ~(block & CNS3XXX_PWR_PLL_ALL);
+ __raw_writel(reg, PM_PLL_HM_PD_CTRL_REG);
+
+ /* Wait for 300us for the PLL output clock locked. */
+ udelay(300);
+};
+EXPORT_SYMBOL(cns3xxx_pwr_power_up);
+
+void cns3xxx_pwr_power_down(unsigned int block)
+{
+ u32 reg = __raw_readl(PM_PLL_HM_PD_CTRL_REG);
+
+ /* write '1' to power down */
+ reg |= (block & CNS3XXX_PWR_PLL_ALL);
+ __raw_writel(reg, PM_PLL_HM_PD_CTRL_REG);
+};
+EXPORT_SYMBOL(cns3xxx_pwr_power_down);
+
+static void cns3xxx_pwr_soft_rst_force(unsigned int block)
+{
+ u32 reg = __raw_readl(PM_SOFT_RST_REG);
+
+ /*
+ * bit 0, 28, 29 => program low to reset,
+ * the other else program low and then high
+ */
+ if (block & 0x30000001) {
+ reg &= ~(block & PM_SOFT_RST_REG_MASK);
+ } else {
+ reg &= ~(block & PM_SOFT_RST_REG_MASK);
+ __raw_writel(reg, PM_SOFT_RST_REG);
+ reg |= (block & PM_SOFT_RST_REG_MASK);
+ }
+
+ __raw_writel(reg, PM_SOFT_RST_REG);
+}
+
+void cns3xxx_pwr_soft_rst(unsigned int block)
+{
+ static unsigned int soft_reset;
+
+ if (soft_reset & block) {
+ /* SPI/I2C/GPIO use the same block, reset once. */
+ return;
+ } else {
+ soft_reset |= block;
+ }
+ cns3xxx_pwr_soft_rst_force(block);
+}
+EXPORT_SYMBOL(cns3xxx_pwr_soft_rst);
+
+void cns3xxx_restart(enum reboot_mode mode, const char *cmd)
+{
+ /*
+ * To reset, we hit the on-board reset register
+ * in the system FPGA.
+ */
+ cns3xxx_pwr_soft_rst(CNS3XXX_PWR_SOFTWARE_RST(GLOBAL));
+}
+
+/*
+ * cns3xxx_cpu_clock - return CPU/L2 clock
+ * aclk: cpu clock/2
+ * hclk: cpu clock/4
+ * pclk: cpu clock/8
+ */
+int cns3xxx_cpu_clock(void)
+{
+ u32 reg = __raw_readl(PM_CLK_CTRL_REG);
+ int cpu;
+ int cpu_sel;
+ int div_sel;
+
+ cpu_sel = (reg >> PM_CLK_CTRL_REG_OFFSET_PLL_CPU_SEL) & 0xf;
+ div_sel = (reg >> PM_CLK_CTRL_REG_OFFSET_CPU_CLK_DIV) & 0x3;
+
+ cpu = (300 + ((cpu_sel / 3) * 100) + ((cpu_sel % 3) * 33)) >> div_sel;
+
+ return cpu;
+}
+EXPORT_SYMBOL(cns3xxx_cpu_clock);
+
+atomic_t usb_pwr_ref = ATOMIC_INIT(0);
+EXPORT_SYMBOL(usb_pwr_ref);