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acrn-kernel/drivers/clk/tegra/clk.c

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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>
2013-01-11 15:46:20 +08:00
/*
* 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>
ARM: tegra: migrate to new clock code Migrate Tegra clock support to drivers/clk/tegra, this involves moving: 1. definition of tegra_cpu_car_ops to clk.c 2. definition of reset functions to clk-peripheral.c 3. change parent of cpu clock. 4. Remove legacy clock initialization. 5. Initialize clocks using DT. 6. Remove all instance of mach/clk.h Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com> [swarren: use to_clk_periph_gate().] Signed-off-by: Stephen Warren <swarren@nvidia.com>
2013-01-11 15:46:26 +08:00
#include <linux/of.h>
#include <linux/clk/tegra.h>
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>
2013-01-11 15:46:20 +08:00
#include "clk.h"
ARM: tegra: migrate to new clock code Migrate Tegra clock support to drivers/clk/tegra, this involves moving: 1. definition of tegra_cpu_car_ops to clk.c 2. definition of reset functions to clk-peripheral.c 3. change parent of cpu clock. 4. Remove legacy clock initialization. 5. Initialize clocks using DT. 6. Remove all instance of mach/clk.h Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com> [swarren: use to_clk_periph_gate().] Signed-off-by: Stephen Warren <swarren@nvidia.com>
2013-01-11 15:46:26 +08:00
/* Global data of Tegra CPU CAR ops */
struct tegra_cpu_car_ops *tegra_cpu_car_ops;
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>
2013-01-11 15:46:20 +08:00
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);
}
}
}
ARM: tegra: migrate to new clock code Migrate Tegra clock support to drivers/clk/tegra, this involves moving: 1. definition of tegra_cpu_car_ops to clk.c 2. definition of reset functions to clk-peripheral.c 3. change parent of cpu clock. 4. Remove legacy clock initialization. 5. Initialize clocks using DT. 6. Remove all instance of mach/clk.h Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com> [swarren: use to_clk_periph_gate().] Signed-off-by: Stephen Warren <swarren@nvidia.com>
2013-01-11 15:46:26 +08:00
static const struct of_device_id tegra_dt_clk_match[] = {
{ .compatible = "nvidia,tegra20-car", .data = tegra20_clock_init },
{ .compatible = "nvidia,tegra30-car", .data = tegra30_clock_init },
{ }
};
void __init tegra_clocks_init(void)
{
of_clk_init(tegra_dt_clk_match);
}