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19f9e2e657
This callback will be used to set a clock's rate if the underlying clock driver supports this option. The function's last parameter is an output parameter, storing the actual frequency set by the clock driver, as it may not precisely match the requested rate in some cases. Change-Id: I6a399bf6f64407d5fbff36407561e4bf18104cf1 Signed-off-by: Ghennadi Procopciuc <ghennadi.procopciuc@nxp.com>
86 lines
1.7 KiB
C
86 lines
1.7 KiB
C
/*
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* Copyright (c) 2021, STMicroelectronics - All Rights Reserved
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* Author(s): Ludovic Barre, <ludovic.barre@st.com> for STMicroelectronics.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <assert.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <drivers/clk.h>
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static const struct clk_ops *ops;
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int clk_enable(unsigned long id)
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{
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assert((ops != NULL) && (ops->enable != NULL));
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return ops->enable(id);
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}
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void clk_disable(unsigned long id)
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{
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assert((ops != NULL) && (ops->disable != NULL));
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ops->disable(id);
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}
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unsigned long clk_get_rate(unsigned long id)
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{
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assert((ops != NULL) && (ops->get_rate != NULL));
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return ops->get_rate(id);
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}
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int clk_set_rate(unsigned long id, unsigned long rate, unsigned long *orate)
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{
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unsigned long lrate;
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assert((ops != NULL) && (ops->set_rate != NULL));
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if (orate != NULL) {
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return ops->set_rate(id, rate, orate);
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}
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/* In case the caller is not interested in the output rate */
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return ops->set_rate(id, rate, &lrate);
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}
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int clk_get_parent(unsigned long id)
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{
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assert((ops != NULL) && (ops->get_parent != NULL));
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return ops->get_parent(id);
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}
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int clk_set_parent(unsigned long id, unsigned long parent_id)
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{
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assert((ops != NULL) && (ops->set_parent != NULL));
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return ops->set_parent(id, parent_id);
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}
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bool clk_is_enabled(unsigned long id)
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{
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assert((ops != NULL) && (ops->is_enabled != NULL));
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return ops->is_enabled(id);
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}
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/*
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* Initialize the clk. The fields in the provided clk
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* ops pointer must be valid.
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*/
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void clk_register(const struct clk_ops *ops_ptr)
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{
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assert((ops_ptr != NULL) &&
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(ops_ptr->enable != NULL) &&
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(ops_ptr->disable != NULL) &&
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(ops_ptr->get_rate != NULL) &&
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(ops_ptr->get_parent != NULL) &&
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(ops_ptr->is_enabled != NULL));
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ops = ops_ptr;
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}
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