diff options
Diffstat (limited to 'drivers/clk/tegra/clk-periph.c')
| -rw-r--r-- | drivers/clk/tegra/clk-periph.c | 66 |
1 files changed, 48 insertions, 18 deletions
diff --git a/drivers/clk/tegra/clk-periph.c b/drivers/clk/tegra/clk-periph.c index cf80831de79d..6ebeaa7cb656 100644 --- a/drivers/clk/tegra/clk-periph.c +++ b/drivers/clk/tegra/clk-periph.c @@ -1,19 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * 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 <linux/export.h> #include <linux/slab.h> @@ -55,8 +45,8 @@ static unsigned long clk_periph_recalc_rate(struct clk_hw *hw, return div_ops->recalc_rate(div_hw, parent_rate); } -static long clk_periph_round_rate(struct clk_hw *hw, unsigned long rate, - unsigned long *prate) +static int clk_periph_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) { struct tegra_clk_periph *periph = to_clk_periph(hw); const struct clk_ops *div_ops = periph->div_ops; @@ -64,7 +54,7 @@ static long clk_periph_round_rate(struct clk_hw *hw, unsigned long rate, __clk_hw_set_clk(div_hw, hw); - return div_ops->round_rate(div_hw, rate, prate); + return div_ops->determine_rate(div_hw, req); } static int clk_periph_set_rate(struct clk_hw *hw, unsigned long rate, @@ -110,31 +100,63 @@ static void clk_periph_disable(struct clk_hw *hw) gate_ops->disable(gate_hw); } -const struct clk_ops tegra_clk_periph_ops = { +static void clk_periph_disable_unused(struct clk_hw *hw) +{ + struct tegra_clk_periph *periph = to_clk_periph(hw); + const struct clk_ops *gate_ops = periph->gate_ops; + struct clk_hw *gate_hw = &periph->gate.hw; + + gate_ops->disable_unused(gate_hw); +} + +static void clk_periph_restore_context(struct clk_hw *hw) +{ + struct tegra_clk_periph *periph = to_clk_periph(hw); + const struct clk_ops *div_ops = periph->div_ops; + struct clk_hw *div_hw = &periph->divider.hw; + int parent_id; + + parent_id = clk_hw_get_parent_index(hw); + if (WARN_ON(parent_id < 0)) + return; + + if (!(periph->gate.flags & TEGRA_PERIPH_NO_DIV)) + div_ops->restore_context(div_hw); + + clk_periph_set_parent(hw, parent_id); +} + +static const struct clk_ops tegra_clk_periph_ops = { .get_parent = clk_periph_get_parent, .set_parent = clk_periph_set_parent, .recalc_rate = clk_periph_recalc_rate, - .round_rate = clk_periph_round_rate, + .determine_rate = clk_periph_determine_rate, .set_rate = clk_periph_set_rate, .is_enabled = clk_periph_is_enabled, .enable = clk_periph_enable, .disable = clk_periph_disable, + .disable_unused = clk_periph_disable_unused, + .restore_context = clk_periph_restore_context, }; static const struct clk_ops tegra_clk_periph_nodiv_ops = { + .determine_rate = clk_hw_determine_rate_no_reparent, .get_parent = clk_periph_get_parent, .set_parent = clk_periph_set_parent, .is_enabled = clk_periph_is_enabled, .enable = clk_periph_enable, .disable = clk_periph_disable, + .disable_unused = clk_periph_disable_unused, + .restore_context = clk_periph_restore_context, }; static const struct clk_ops tegra_clk_periph_no_gate_ops = { .get_parent = clk_periph_get_parent, .set_parent = clk_periph_set_parent, .recalc_rate = clk_periph_recalc_rate, - .round_rate = clk_periph_round_rate, + .determine_rate = clk_periph_determine_rate, .set_rate = clk_periph_set_rate, + .restore_context = clk_periph_restore_context, }; static struct clk *_tegra_clk_register_periph(const char *name, @@ -203,3 +225,11 @@ struct clk *tegra_clk_register_periph_nodiv(const char *name, return _tegra_clk_register_periph(name, parent_names, num_parents, periph, clk_base, offset, CLK_SET_RATE_PARENT); } + +struct clk *tegra_clk_register_periph_data(void __iomem *clk_base, + struct tegra_periph_init_data *init) +{ + return _tegra_clk_register_periph(init->name, init->p.parent_names, + init->num_parents, &init->periph, + clk_base, init->offset, init->flags); +} |