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f0d8048525
This adds support for i.MX SoC family to interconnect framework. Platform drivers can describe the interconnect graph and several adjustment knobs where icc node bandwidth is converted to a DEV_PM_QOS_MIN_FREQUENCY request. The interconnect provider is probed through the main NOC device and other adjustable nodes on the same graph are found from a fsl,scalable-nodes phandle array property. Signed-off-by: Alexandre Bailon <abailon@baylibre.com> Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Tested-by: Martin Kepplinger <martin.kepplinger@puri.sm> Link: https://lore.kernel.org/r/35920e673df6c04cbbb7d877a7d4ba25fd91a784.1586174566.git.leonard.crestez@nxp.com Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Interconnect framework driver for i.MX SoC
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*
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* Copyright (c) 2019, BayLibre
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* Copyright (c) 2019-2020, NXP
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* Author: Alexandre Bailon <abailon@baylibre.com>
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* Author: Leonard Crestez <leonard.crestez@nxp.com>
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*/
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#ifndef __DRIVERS_INTERCONNECT_IMX_H
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#define __DRIVERS_INTERCONNECT_IMX_H
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#include <linux/kernel.h>
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#define IMX_ICC_MAX_LINKS 4
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/*
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* struct imx_icc_node_adj - Describe a dynamic adjustable node
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*/
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struct imx_icc_node_adj_desc {
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unsigned int bw_mul, bw_div;
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const char *phandle_name;
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bool main_noc;
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};
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/*
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* struct imx_icc_node - Describe an interconnect node
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* @name: name of the node
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* @id: an unique id to identify the node
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* @links: an array of slaves' node id
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* @num_links: number of id defined in links
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*/
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struct imx_icc_node_desc {
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const char *name;
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u16 id;
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u16 links[IMX_ICC_MAX_LINKS];
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u16 num_links;
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const struct imx_icc_node_adj_desc *adj;
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};
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#define DEFINE_BUS_INTERCONNECT(_name, _id, _adj, ...) \
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{ \
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.id = _id, \
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.name = _name, \
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.adj = _adj, \
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.num_links = ARRAY_SIZE(((int[]){ __VA_ARGS__ })), \
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.links = { __VA_ARGS__ }, \
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}
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#define DEFINE_BUS_MASTER(_name, _id, _dest_id) \
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DEFINE_BUS_INTERCONNECT(_name, _id, NULL, _dest_id)
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#define DEFINE_BUS_SLAVE(_name, _id, _adj) \
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DEFINE_BUS_INTERCONNECT(_name, _id, _adj)
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int imx_icc_register(struct platform_device *pdev,
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struct imx_icc_node_desc *nodes,
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int nodes_count);
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int imx_icc_unregister(struct platform_device *pdev);
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#endif /* __DRIVERS_INTERCONNECT_IMX_H */
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