clk: tegra: add Tegra specific clocks

Add Tegra specific clocks, pll, pll_out, peripheral, frac_divider, super.

Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com>
[swarren: alloc sizeof(*foo) not sizeof(struct foo), add comments re:
storing pointers to stack variables, make a timeout loop more idiomatic,
use _clk_pll_disable() not clk_disable_pll() from _program_pll() to
avoid redundant lock operations, unified tegra_clk_periph() and
tegra_clk_periph_nodiv(), unified tegra_clk_pll{,e}, rename all clock
registration functions so they don't have the same name as the clock
structs, return -EINVAL from clk_plle_enable when matching table rate
not found, pass ops to _tegra_clk_register_pll rather than a bool.]
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Stephen Warren <swarren@nvidia.com>

1 files changed, 69 insertions, 0 deletions

diff --git a/drivers/clk/tegra/clk.c b/drivers/clk/tegra/clk.c
new file mode 100644
index 000000000000..cf023a937208
--- /dev/null
+++ b/drivers/clk/tegra/clk.c
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+
+#include "clk.h"
+
+void __init tegra_init_dup_clks(struct tegra_clk_duplicate *dup_list,
+				struct clk *clks[], int clk_max)
+{
+	struct clk *clk;
+
+	for (; dup_list->clk_id < clk_max; dup_list++) {
+		clk = clks[dup_list->clk_id];
+		dup_list->lookup.clk = clk;
+		clkdev_add(&dup_list->lookup);
+	}
+}
+
+void __init tegra_init_from_table(struct tegra_clk_init_table *tbl,
+				  struct clk *clks[], int clk_max)
+{
+	struct clk *clk;
+
+	for (; tbl->clk_id < clk_max; tbl++) {
+		clk = clks[tbl->clk_id];
+		if (IS_ERR_OR_NULL(clk))
+			return;
+
+		if (tbl->parent_id < clk_max) {
+			struct clk *parent = clks[tbl->parent_id];
+			if (clk_set_parent(clk, parent)) {
+				pr_err("%s: Failed to set parent %s of %s\n",
+				       __func__, __clk_get_name(parent),
+				       __clk_get_name(clk));
+				WARN_ON(1);
+			}
+		}
+
+		if (tbl->rate)
+			if (clk_set_rate(clk, tbl->rate)) {
+				pr_err("%s: Failed to set rate %lu of %s\n",
+				       __func__, tbl->rate,
+				       __clk_get_name(clk));
+				WARN_ON(1);
+			}
+
+		if (tbl->state)
+			if (clk_prepare_enable(clk)) {
+				pr_err("%s: Failed to enable %s\n", __func__,
+				       __clk_get_name(clk));
+				WARN_ON(1);
+			}
+	}
+}