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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/drivers/clk/versatile/clk-versatile.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/drivers/clk/versatile/clk-versatile.c')
-rw-r--r--kernel/drivers/clk/versatile/clk-versatile.c101
1 files changed, 101 insertions, 0 deletions
diff --git a/kernel/drivers/clk/versatile/clk-versatile.c b/kernel/drivers/clk/versatile/clk-versatile.c
new file mode 100644
index 000000000..7a4f8635b
--- /dev/null
+++ b/kernel/drivers/clk/versatile/clk-versatile.c
@@ -0,0 +1,101 @@
+/*
+ * Clock driver for the ARM Integrator/AP, Integrator/CP, Versatile AB and
+ * Versatile PB boards.
+ * Copyright (C) 2012 Linus Walleij
+ *
+ * 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.
+ */
+#include <linux/clk-provider.h>
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+#include "clk-icst.h"
+
+#define INTEGRATOR_HDR_LOCK_OFFSET 0x14
+
+#define VERSATILE_SYS_OSCCLCD_OFFSET 0x1c
+#define VERSATILE_SYS_LOCK_OFFSET 0x20
+
+/* Base offset for the core module */
+static void __iomem *cm_base;
+
+static const struct icst_params cp_auxosc_params = {
+ .vco_max = ICST525_VCO_MAX_5V,
+ .vco_min = ICST525_VCO_MIN,
+ .vd_min = 8,
+ .vd_max = 263,
+ .rd_min = 3,
+ .rd_max = 65,
+ .s2div = icst525_s2div,
+ .idx2s = icst525_idx2s,
+};
+
+static const struct clk_icst_desc __initdata cm_auxosc_desc = {
+ .params = &cp_auxosc_params,
+ .vco_offset = 0x1c,
+ .lock_offset = INTEGRATOR_HDR_LOCK_OFFSET,
+};
+
+static const struct icst_params versatile_auxosc_params = {
+ .vco_max = ICST307_VCO_MAX,
+ .vco_min = ICST307_VCO_MIN,
+ .vd_min = 4 + 8,
+ .vd_max = 511 + 8,
+ .rd_min = 1 + 2,
+ .rd_max = 127 + 2,
+ .s2div = icst307_s2div,
+ .idx2s = icst307_idx2s,
+};
+
+static const struct clk_icst_desc versatile_auxosc_desc __initconst = {
+ .params = &versatile_auxosc_params,
+ .vco_offset = VERSATILE_SYS_OSCCLCD_OFFSET,
+ .lock_offset = VERSATILE_SYS_LOCK_OFFSET,
+};
+static void __init cm_osc_setup(struct device_node *np,
+ const struct clk_icst_desc *desc)
+{
+ struct clk *clk = ERR_PTR(-EINVAL);
+ const char *clk_name = np->name;
+ const char *parent_name;
+
+ if (!cm_base) {
+ /* Remap the core module base if not done yet */
+ struct device_node *parent;
+
+ parent = of_get_parent(np);
+ if (!parent) {
+ pr_err("no parent on core module clock\n");
+ return;
+ }
+ cm_base = of_iomap(parent, 0);
+ if (!cm_base) {
+ pr_err("could not remap core module base\n");
+ return;
+ }
+ }
+
+ parent_name = of_clk_get_parent_name(np, 0);
+ clk = icst_clk_register(NULL, desc, clk_name, parent_name, cm_base);
+ if (!IS_ERR(clk))
+ of_clk_add_provider(np, of_clk_src_simple_get, clk);
+}
+
+static void __init of_integrator_cm_osc_setup(struct device_node *np)
+{
+ cm_osc_setup(np, &cm_auxosc_desc);
+}
+CLK_OF_DECLARE(integrator_cm_auxosc_clk,
+ "arm,integrator-cm-auxosc", of_integrator_cm_osc_setup);
+
+static void __init of_versatile_cm_osc_setup(struct device_node *np)
+{
+ cm_osc_setup(np, &versatile_auxosc_desc);
+}
+CLK_OF_DECLARE(versatile_cm_auxosc_clk,
+ "arm,versatile-cm-auxosc", of_versatile_cm_osc_setup);