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authorPrashant Gaikwad <pgaikwad@nvidia.com>2013-01-11 13:16:20 +0530
committerStephen Warren <swarren@nvidia.com>2013-01-28 11:19:07 -0700
commit8f8f484bf355e546c62c47b8a8c8d19b28787798 (patch)
treecd64be7c876f3bdc9bcf8d06d7c02304bbffc93e /drivers/clk/tegra/clk.c
parent9598566721fe7524cca575975ea7e8ea2e27a71b (diff)
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>
Diffstat (limited to 'drivers/clk/tegra/clk.c')
-rw-r--r--drivers/clk/tegra/clk.c69
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);
+ }
+ }
+}