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>

1 files changed, 117 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-imx/clk-imx1.c b/kernel/arch/arm/mach-imx/clk-imx1.c
new file mode 100644
index 000000000..37c307a8d
--- /dev/null
+++ b/kernel/arch/arm/mach-imx/clk-imx1.c
@@ -0,0 +1,117 @@
+/*
+ *  Copyright (C) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <dt-bindings/clock/imx1-clock.h>
+
+#include "clk.h"
+#include "common.h"
+#include "hardware.h"
+
+static const char *prem_sel_clks[] = { "clk32_premult", "clk16m", };
+static const char *clko_sel_clks[] = { "per1", "hclk", "clk48m", "clk16m",
+				       "prem", "fclk", };
+
+static struct clk *clk[IMX1_CLK_MAX];
+static struct clk_onecell_data clk_data;
+
+static void __iomem *ccm __initdata;
+#define CCM_CSCR	(ccm + 0x0000)
+#define CCM_MPCTL0	(ccm + 0x0004)
+#define CCM_SPCTL0	(ccm + 0x000c)
+#define CCM_PCDR	(ccm + 0x0020)
+#define SCM_GCCR	(ccm + 0x0810)
+
+static void __init _mx1_clocks_init(unsigned long fref)
+{
+	clk[IMX1_CLK_DUMMY] = imx_clk_fixed("dummy", 0);
+	clk[IMX1_CLK_CLK32] = imx_obtain_fixed_clock("clk32", fref);
+	clk[IMX1_CLK_CLK16M_EXT] = imx_clk_fixed("clk16m_ext", 16000000);
+	clk[IMX1_CLK_CLK16M] = imx_clk_gate("clk16m", "clk16m_ext", CCM_CSCR, 17);
+	clk[IMX1_CLK_CLK32_PREMULT] = imx_clk_fixed_factor("clk32_premult", "clk32", 512, 1);
+	clk[IMX1_CLK_PREM] = imx_clk_mux("prem", CCM_CSCR, 16, 1, prem_sel_clks, ARRAY_SIZE(prem_sel_clks));
+	clk[IMX1_CLK_MPLL] = imx_clk_pllv1("mpll", "clk32_premult", CCM_MPCTL0);
+	clk[IMX1_CLK_MPLL_GATE] = imx_clk_gate("mpll_gate", "mpll", CCM_CSCR, 0);
+	clk[IMX1_CLK_SPLL] = imx_clk_pllv1("spll", "prem", CCM_SPCTL0);
+	clk[IMX1_CLK_SPLL_GATE] = imx_clk_gate("spll_gate", "spll", CCM_CSCR, 1);
+	clk[IMX1_CLK_MCU] = imx_clk_divider("mcu", "clk32_premult", CCM_CSCR, 15, 1);
+	clk[IMX1_CLK_FCLK] = imx_clk_divider("fclk", "mpll_gate", CCM_CSCR, 15, 1);
+	clk[IMX1_CLK_HCLK] = imx_clk_divider("hclk", "spll_gate", CCM_CSCR, 10, 4);
+	clk[IMX1_CLK_CLK48M] = imx_clk_divider("clk48m", "spll_gate", CCM_CSCR, 26, 3);
+	clk[IMX1_CLK_PER1] = imx_clk_divider("per1", "spll_gate", CCM_PCDR, 0, 4);
+	clk[IMX1_CLK_PER2] = imx_clk_divider("per2", "spll_gate", CCM_PCDR, 4, 4);
+	clk[IMX1_CLK_PER3] = imx_clk_divider("per3", "spll_gate", CCM_PCDR, 16, 7);
+	clk[IMX1_CLK_CLKO] = imx_clk_mux("clko", CCM_CSCR, 29, 3, clko_sel_clks, ARRAY_SIZE(clko_sel_clks));
+	clk[IMX1_CLK_UART3_GATE] = imx_clk_gate("uart3_gate", "hclk", SCM_GCCR, 6);
+	clk[IMX1_CLK_SSI2_GATE] = imx_clk_gate("ssi2_gate", "hclk", SCM_GCCR, 5);
+	clk[IMX1_CLK_BROM_GATE] = imx_clk_gate("brom_gate", "hclk", SCM_GCCR, 4);
+	clk[IMX1_CLK_DMA_GATE] = imx_clk_gate("dma_gate", "hclk", SCM_GCCR, 3);
+	clk[IMX1_CLK_CSI_GATE] = imx_clk_gate("csi_gate", "hclk", SCM_GCCR, 2);
+	clk[IMX1_CLK_MMA_GATE] = imx_clk_gate("mma_gate", "hclk", SCM_GCCR, 1);
+	clk[IMX1_CLK_USBD_GATE] = imx_clk_gate("usbd_gate", "clk48m", SCM_GCCR, 0);
+
+	imx_check_clocks(clk, ARRAY_SIZE(clk));
+}
+
+int __init mx1_clocks_init(unsigned long fref)
+{
+	ccm = MX1_IO_ADDRESS(MX1_CCM_BASE_ADDR);
+
+	_mx1_clocks_init(fref);
+
+	clk_register_clkdev(clk[IMX1_CLK_PER1], "per", "imx-gpt.0");
+	clk_register_clkdev(clk[IMX1_CLK_HCLK], "ipg", "imx-gpt.0");
+	clk_register_clkdev(clk[IMX1_CLK_DMA_GATE], "ahb", "imx1-dma");
+	clk_register_clkdev(clk[IMX1_CLK_HCLK], "ipg", "imx1-dma");
+	clk_register_clkdev(clk[IMX1_CLK_PER1], "per", "imx1-uart.0");
+	clk_register_clkdev(clk[IMX1_CLK_HCLK], "ipg", "imx1-uart.0");
+	clk_register_clkdev(clk[IMX1_CLK_PER1], "per", "imx1-uart.1");
+	clk_register_clkdev(clk[IMX1_CLK_HCLK], "ipg", "imx1-uart.1");
+	clk_register_clkdev(clk[IMX1_CLK_PER1], "per", "imx1-uart.2");
+	clk_register_clkdev(clk[IMX1_CLK_UART3_GATE], "ipg", "imx1-uart.2");
+	clk_register_clkdev(clk[IMX1_CLK_HCLK], NULL, "imx1-i2c.0");
+	clk_register_clkdev(clk[IMX1_CLK_PER2], "per", "imx1-cspi.0");
+	clk_register_clkdev(clk[IMX1_CLK_DUMMY], "ipg", "imx1-cspi.0");
+	clk_register_clkdev(clk[IMX1_CLK_PER2], "per", "imx1-cspi.1");
+	clk_register_clkdev(clk[IMX1_CLK_DUMMY], "ipg", "imx1-cspi.1");
+	clk_register_clkdev(clk[IMX1_CLK_PER2], "per", "imx1-fb.0");
+	clk_register_clkdev(clk[IMX1_CLK_DUMMY], "ipg", "imx1-fb.0");
+	clk_register_clkdev(clk[IMX1_CLK_DUMMY], "ahb", "imx1-fb.0");
+
+	mxc_timer_init(MX1_IO_ADDRESS(MX1_TIM1_BASE_ADDR), MX1_TIM1_INT);
+
+	return 0;
+}
+
+static void __init mx1_clocks_init_dt(struct device_node *np)
+{
+	ccm = of_iomap(np, 0);
+	BUG_ON(!ccm);
+
+	_mx1_clocks_init(32768);
+
+	clk_data.clks = clk;
+	clk_data.clk_num = ARRAY_SIZE(clk);
+	of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
+}
+CLK_OF_DECLARE(imx1_ccm, "fsl,imx1-ccm", mx1_clocks_init_dt);