drivers/interconnect/qcom/qcs404.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2019 Linaro Ltd
 */

#include <dt-bindings/interconnect/qcom,qcs404.h>
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/interconnect-provider.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

#include "smd-rpm.h"

#define RPM_BUS_MASTER_REQ	0x73616d62
#define RPM_BUS_SLAVE_REQ	0x766c7362

enum {
	QCS404_MASTER_AMPSS_M0 = 1,
	QCS404_MASTER_GRAPHICS_3D,
	QCS404_MASTER_MDP_PORT0,
	QCS404_SNOC_BIMC_1_MAS,
	QCS404_MASTER_TCU_0,
	QCS404_MASTER_SPDM,
	QCS404_MASTER_BLSP_1,
	QCS404_MASTER_BLSP_2,
	QCS404_MASTER_XM_USB_HS1,
	QCS404_MASTER_CRYPTO_CORE0,
	QCS404_MASTER_SDCC_1,
	QCS404_MASTER_SDCC_2,
	QCS404_SNOC_PNOC_MAS,
	QCS404_MASTER_QPIC,
	QCS404_MASTER_QDSS_BAM,
	QCS404_BIMC_SNOC_MAS,
	QCS404_PNOC_SNOC_MAS,
	QCS404_MASTER_QDSS_ETR,
	QCS404_MASTER_EMAC,
	QCS404_MASTER_PCIE,
	QCS404_MASTER_USB3,
	QCS404_PNOC_INT_0,
	QCS404_PNOC_INT_2,
	QCS404_PNOC_INT_3,
	QCS404_PNOC_SLV_0,
	QCS404_PNOC_SLV_1,
	QCS404_PNOC_SLV_2,
	QCS404_PNOC_SLV_3,
	QCS404_PNOC_SLV_4,
	QCS404_PNOC_SLV_6,
	QCS404_PNOC_SLV_7,
	QCS404_PNOC_SLV_8,
	QCS404_PNOC_SLV_9,
	QCS404_PNOC_SLV_10,
	QCS404_PNOC_SLV_11,
	QCS404_SNOC_QDSS_INT,
	QCS404_SNOC_INT_0,
	QCS404_SNOC_INT_1,
	QCS404_SNOC_INT_2,
	QCS404_SLAVE_EBI_CH0,
	QCS404_BIMC_SNOC_SLV,
	QCS404_SLAVE_SPDM_WRAPPER,
	QCS404_SLAVE_PDM,
	QCS404_SLAVE_PRNG,
	QCS404_SLAVE_TCSR,
	QCS404_SLAVE_SNOC_CFG,
	QCS404_SLAVE_MESSAGE_RAM,
	QCS404_SLAVE_DISPLAY_CFG,
	QCS404_SLAVE_GRAPHICS_3D_CFG,
	QCS404_SLAVE_BLSP_1,
	QCS404_SLAVE_TLMM_NORTH,
	QCS404_SLAVE_PCIE_1,
	QCS404_SLAVE_EMAC_CFG,
	QCS404_SLAVE_BLSP_2,
	QCS404_SLAVE_TLMM_EAST,
	QCS404_SLAVE_TCU,
	QCS404_SLAVE_PMIC_ARB,
	QCS404_SLAVE_SDCC_1,
	QCS404_SLAVE_SDCC_2,
	QCS404_SLAVE_TLMM_SOUTH,
	QCS404_SLAVE_USB_HS,
	QCS404_SLAVE_USB3,
	QCS404_SLAVE_CRYPTO_0_CFG,
	QCS404_PNOC_SNOC_SLV,
	QCS404_SLAVE_APPSS,
	QCS404_SLAVE_WCSS,
	QCS404_SNOC_BIMC_1_SLV,
	QCS404_SLAVE_OCIMEM,
	QCS404_SNOC_PNOC_SLV,
	QCS404_SLAVE_QDSS_STM,
	QCS404_SLAVE_CATS_128,
	QCS404_SLAVE_OCMEM_64,
	QCS404_SLAVE_LPASS,
};

#define to_qcom_provider(_provider) \
	container_of(_provider, struct qcom_icc_provider, provider)

static const struct clk_bulk_data bus_clocks[] = {
	{ .id = "bus" },
	{ .id = "bus_a" },
};

/**
 * struct qcom_icc_provider - Qualcomm specific interconnect provider
 * @provider: generic interconnect provider
 * @bus_clks: the clk_bulk_data table of bus clocks
 * @num_clks: the total number of clk_bulk_data entries
 */
struct qcom_icc_provider {
	struct icc_provider provider;
	struct clk_bulk_data *bus_clks;
	int num_clks;
};

#define QCS404_MAX_LINKS	12

/**
 * struct qcom_icc_node - Qualcomm specific interconnect nodes
 * @name: the node name used in debugfs
 * @id: a unique node identifier
 * @links: an array of nodes where we can go next while traversing
 * @num_links: the total number of @links
 * @buswidth: width of the interconnect between a node and the bus (bytes)
 * @mas_rpm_id:	RPM id for devices that are bus masters
 * @slv_rpm_id:	RPM id for devices that are bus slaves
 * @rate: current bus clock rate in Hz
 */
struct qcom_icc_node {
	unsigned char *name;
	u16 id;
	u16 links[QCS404_MAX_LINKS];
	u16 num_links;
	u16 buswidth;
	int mas_rpm_id;
	int slv_rpm_id;
	u64 rate;
};

struct qcom_icc_desc {
	struct qcom_icc_node **nodes;
	size_t num_nodes;
};

#define DEFINE_QNODE(_name, _id, _buswidth, _mas_rpm_id, _slv_rpm_id,	\
		     ...)						\
		static struct qcom_icc_node _name = {			\
		.name = #_name,						\
		.id = _id,						\
		.buswidth = _buswidth,					\
		.mas_rpm_id = _mas_rpm_id,				\
		.slv_rpm_id = _slv_rpm_id,				\
		.num_links = ARRAY_SIZE(((int[]){ __VA_ARGS__ })),	\
		.links = { __VA_ARGS__ },				\
	}

DEFINE_QNODE(mas_apps_proc, QCS404_MASTER_AMPSS_M0, 8, 0, -1, QCS404_SLAVE_EBI_CH0, QCS404_BIMC_SNOC_SLV);
DEFINE_QNODE(mas_oxili, QCS404_MASTER_GRAPHICS_3D, 8, -1, -1, QCS404_SLAVE_EBI_CH0, QCS404_BIMC_SNOC_SLV);
DEFINE_QNODE(mas_mdp, QCS404_MASTER_MDP_PORT0, 8, -1, -1, QCS404_SLAVE_EBI_CH0, QCS404_BIMC_SNOC_SLV);
DEFINE_QNODE(mas_snoc_bimc_1, QCS404_SNOC_BIMC_1_MAS, 8, 76, -1, QCS404_SLAVE_EBI_CH0);
DEFINE_QNODE(mas_tcu_0, QCS404_MASTER_TCU_0, 8, -1, -1, QCS404_SLAVE_EBI_CH0, QCS404_BIMC_SNOC_SLV);
DEFINE_QNODE(mas_spdm, QCS404_MASTER_SPDM, 4, -1, -1, QCS404_PNOC_INT_3);
DEFINE_QNODE(mas_blsp_1, QCS404_MASTER_BLSP_1, 4, 41, -1, QCS404_PNOC_INT_3);
DEFINE_QNODE(mas_blsp_2, QCS404_MASTER_BLSP_2, 4, 39, -1, QCS404_PNOC_INT_3);
DEFINE_QNODE(mas_xi_usb_hs1, QCS404_MASTER_XM_USB_HS1, 8, 138, -1, QCS404_PNOC_INT_0);
DEFINE_QNODE(mas_crypto, QCS404_MASTER_CRYPTO_CORE0, 8, 23, -1, QCS404_PNOC_SNOC_SLV, QCS404_PNOC_INT_2);
DEFINE_QNODE(mas_sdcc_1, QCS404_MASTER_SDCC_1, 8, 33, -1, QCS404_PNOC_INT_0);
DEFINE_QNODE(mas_sdcc_2, QCS404_MASTER_SDCC_2, 8, 35, -1, QCS404_PNOC_INT_0);
DEFINE_QNODE(mas_snoc_pcnoc, QCS404_SNOC_PNOC_MAS, 8, 77, -1, QCS404_PNOC_INT_2);
DEFINE_QNODE(mas_qpic, QCS404_MASTER_QPIC, 4, -1, -1, QCS404_PNOC_INT_0);
DEFINE_QNODE(mas_qdss_bam, QCS404_MASTER_QDSS_BAM, 4, -1, -1, QCS404_SNOC_QDSS_INT);
DEFINE_QNODE(mas_bimc_snoc, QCS404_BIMC_SNOC_MAS, 8, 21, -1, QCS404_SLAVE_OCMEM_64, QCS404_SLAVE_CATS_128, QCS404_SNOC_INT_0, QCS404_SNOC_INT_1);
DEFINE_QNODE(mas_pcnoc_snoc, QCS404_PNOC_SNOC_MAS, 8, 29, -1, QCS404_SNOC_BIMC_1_SLV, QCS404_SNOC_INT_2, QCS404_SNOC_INT_0);
DEFINE_QNODE(mas_qdss_etr, QCS404_MASTER_QDSS_ETR, 8, -1, -1, QCS404_SNOC_QDSS_INT);
DEFINE_QNODE(mas_emac, QCS404_MASTER_EMAC, 8, -1, -1, QCS404_SNOC_BIMC_1_SLV, QCS404_SNOC_INT_1);
DEFINE_QNODE(mas_pcie, QCS404_MASTER_PCIE, 8, -1, -1, QCS404_SNOC_BIMC_1_SLV, QCS404_SNOC_INT_1);
DEFINE_QNODE(mas_usb3, QCS404_MASTER_USB3, 8, -1, -1, QCS404_SNOC_BIMC_1_SLV, QCS404_SNOC_INT_1);
DEFINE_QNODE(pcnoc_int_0, QCS404_PNOC_INT_0, 8, 85, 114, QCS404_PNOC_SNOC_SLV, QCS404_PNOC_INT_2);
DEFINE_QNODE(pcnoc_int_2, QCS404_PNOC_INT_2, 8, 124, 184, QCS404_PNOC_SLV_10, QCS404_SLAVE_TCU, QCS404_PNOC_SLV_11, QCS404_PNOC_SLV_2, QCS404_PNOC_SLV_3, QCS404_PNOC_SLV_0, QCS404_PNOC_SLV_1, QCS404_PNOC_SLV_6, QCS404_PNOC_SLV_7, QCS404_PNOC_SLV_4, QCS404_PNOC_SLV_8, QCS404_PNOC_SLV_9);
DEFINE_QNODE(pcnoc_int_3, QCS404_PNOC_INT_3, 8, 125, 185, QCS404_PNOC_SNOC_SLV);
DEFINE_QNODE(pcnoc_s_0, QCS404_PNOC_SLV_0, 4, 89, 118, QCS404_SLAVE_PRNG, QCS404_SLAVE_SPDM_WRAPPER, QCS404_SLAVE_PDM);
DEFINE_QNODE(pcnoc_s_1, QCS404_PNOC_SLV_1, 4, 90, 119, QCS404_SLAVE_TCSR);
DEFINE_QNODE(pcnoc_s_2, QCS404_PNOC_SLV_2, 4, -1, -1, QCS404_SLAVE_GRAPHICS_3D_CFG);
DEFINE_QNODE(pcnoc_s_3, QCS404_PNOC_SLV_3, 4, 92, 121, QCS404_SLAVE_MESSAGE_RAM);
DEFINE_QNODE(pcnoc_s_4, QCS404_PNOC_SLV_4, 4, 93, 122, QCS404_SLAVE_SNOC_CFG);
DEFINE_QNODE(pcnoc_s_6, QCS404_PNOC_SLV_6, 4, 94, 123, QCS404_SLAVE_BLSP_1, QCS404_SLAVE_TLMM_NORTH, QCS404_SLAVE_EMAC_CFG);
DEFINE_QNODE(pcnoc_s_7, QCS404_PNOC_SLV_7, 4, 95, 124, QCS404_SLAVE_TLMM_SOUTH, QCS404_SLAVE_DISPLAY_CFG, QCS404_SLAVE_SDCC_1, QCS404_SLAVE_PCIE_1, QCS404_SLAVE_SDCC_2);
DEFINE_QNODE(pcnoc_s_8, QCS404_PNOC_SLV_8, 4, 96, 125, QCS404_SLAVE_CRYPTO_0_CFG);
DEFINE_QNODE(pcnoc_s_9, QCS404_PNOC_SLV_9, 4, 97, 126, QCS404_SLAVE_BLSP_2, QCS404_SLAVE_TLMM_EAST, QCS404_SLAVE_PMIC_ARB);
DEFINE_QNODE(pcnoc_s_10, QCS404_PNOC_SLV_10, 4, 157, -1, QCS404_SLAVE_USB_HS);
DEFINE_QNODE(pcnoc_s_11, QCS404_PNOC_SLV_11, 4, 158, 246, QCS404_SLAVE_USB3);
DEFINE_QNODE(qdss_int, QCS404_SNOC_QDSS_INT, 8, -1, -1, QCS404_SNOC_BIMC_1_SLV, QCS404_SNOC_INT_1);
DEFINE_QNODE(snoc_int_0, QCS404_SNOC_INT_0, 8, 99, 130, QCS404_SLAVE_LPASS, QCS404_SLAVE_APPSS, QCS404_SLAVE_WCSS);
DEFINE_QNODE(snoc_int_1, QCS404_SNOC_INT_1, 8, 100, 131, QCS404_SNOC_PNOC_SLV, QCS404_SNOC_INT_2);
DEFINE_QNODE(snoc_int_2, QCS404_SNOC_INT_2, 8, 134, 197, QCS404_SLAVE_QDSS_STM, QCS404_SLAVE_OCIMEM);
DEFINE_QNODE(slv_ebi, QCS404_SLAVE_EBI_CH0, 8, -1, 0, 0);
DEFINE_QNODE(slv_bimc_snoc, QCS404_BIMC_SNOC_SLV, 8, -1, 2, QCS404_BIMC_SNOC_MAS);
DEFINE_QNODE(slv_spdm, QCS404_SLAVE_SPDM_WRAPPER, 4, -1, -1, 0);
DEFINE_QNODE(slv_pdm, QCS404_SLAVE_PDM, 4, -1, 41, 0);
DEFINE_QNODE(slv_prng, QCS404_SLAVE_PRNG, 4, -1, 44, 0);
DEFINE_QNODE(slv_tcsr, QCS404_SLAVE_TCSR, 4, -1, 50, 0);
DEFINE_QNODE(slv_snoc_cfg, QCS404_SLAVE_SNOC_CFG, 4, -1, 70, 0);
DEFINE_QNODE(slv_message_ram, QCS404_SLAVE_MESSAGE_RAM, 4, -1, 55, 0);
DEFINE_QNODE(slv_disp_ss_cfg, QCS404_SLAVE_DISPLAY_CFG, 4, -1, -1, 0);
DEFINE_QNODE(slv_gpu_cfg, QCS404_SLAVE_GRAPHICS_3D_CFG, 4, -1, -1, 0);
DEFINE_QNODE(slv_blsp_1, QCS404_SLAVE_BLSP_1, 4, -1, 39, 0);
DEFINE_QNODE(slv_tlmm_north, QCS404_SLAVE_TLMM_NORTH, 4, -1, 214, 0);
DEFINE_QNODE(slv_pcie, QCS404_SLAVE_PCIE_1, 4, -1, -1, 0);
DEFINE_QNODE(slv_ethernet, QCS404_SLAVE_EMAC_CFG, 4, -1, -1, 0);
DEFINE_QNODE(slv_blsp_2, QCS404_SLAVE_BLSP_2, 4, -1, 37, 0);
DEFINE_QNODE(slv_tlmm_east, QCS404_SLAVE_TLMM_EAST, 4, -1, 213, 0);
DEFINE_QNODE(slv_tcu, QCS404_SLAVE_TCU, 8, -1, -1, 0);
DEFINE_QNODE(slv_pmic_arb, QCS404_SLAVE_PMIC_ARB, 4, -1, 59, 0);
DEFINE_QNODE(slv_sdcc_1, QCS404_SLAVE_SDCC_1, 4, -1, 31, 0);
DEFINE_QNODE(slv_sdcc_2, QCS404_SLAVE_SDCC_2, 4, -1, 33, 0);
DEFINE_QNODE(slv_tlmm_south, QCS404_SLAVE_TLMM_SOUTH, 4, -1, -1, 0);
DEFINE_QNODE(slv_usb_hs, QCS404_SLAVE_USB_HS, 4, -1, 40, 0);
DEFINE_QNODE(slv_usb3, QCS404_SLAVE_USB3, 4, -1, 22, 0);
DEFINE_QNODE(slv_crypto_0_cfg, QCS404_SLAVE_CRYPTO_0_CFG, 4, -1, 52, 0);
DEFINE_QNODE(slv_pcnoc_snoc, QCS404_PNOC_SNOC_SLV, 8, -1, 45, QCS404_PNOC_SNOC_MAS);
DEFINE_QNODE(slv_kpss_ahb, QCS404_SLAVE_APPSS, 4, -1, -1, 0);
DEFINE_QNODE(slv_wcss, QCS404_SLAVE_WCSS, 4, -1, 23, 0);
DEFINE_QNODE(slv_snoc_bimc_1, QCS404_SNOC_BIMC_1_SLV, 8, -1, 104, QCS404_SNOC_BIMC_1_MAS);
DEFINE_QNODE(slv_imem, QCS404_SLAVE_OCIMEM, 8, -1, 26, 0);
DEFINE_QNODE(slv_snoc_pcnoc, QCS404_SNOC_PNOC_SLV, 8, -1, 28, QCS404_SNOC_PNOC_MAS);
DEFINE_QNODE(slv_qdss_stm, QCS404_SLAVE_QDSS_STM, 4, -1, 30, 0);
DEFINE_QNODE(slv_cats_0, QCS404_SLAVE_CATS_128, 16, -1, -1, 0);
DEFINE_QNODE(slv_cats_1, QCS404_SLAVE_OCMEM_64, 8, -1, -1, 0);
DEFINE_QNODE(slv_lpass, QCS404_SLAVE_LPASS, 4, -1, -1, 0);

static struct qcom_icc_node *qcs404_bimc_nodes[] = {
	[MASTER_AMPSS_M0] = &mas_apps_proc,
	[MASTER_OXILI] = &mas_oxili,
	[MASTER_MDP_PORT0] = &mas_mdp,
	[MASTER_SNOC_BIMC_1] = &mas_snoc_bimc_1,
	[MASTER_TCU_0] = &mas_tcu_0,
	[SLAVE_EBI_CH0] = &slv_ebi,
	[SLAVE_BIMC_SNOC] = &slv_bimc_snoc,
};

static struct qcom_icc_desc qcs404_bimc = {
	.nodes = qcs404_bimc_nodes,
	.num_nodes = ARRAY_SIZE(qcs404_bimc_nodes),
};

static struct qcom_icc_node *qcs404_pcnoc_nodes[] = {
	[MASTER_SPDM] = &mas_spdm,
	[MASTER_BLSP_1] = &mas_blsp_1,
	[MASTER_BLSP_2] = &mas_blsp_2,
	[MASTER_XI_USB_HS1] = &mas_xi_usb_hs1,
	[MASTER_CRYPT0] = &mas_crypto,
	[MASTER_SDCC_1] = &mas_sdcc_1,
	[MASTER_SDCC_2] = &mas_sdcc_2,
	[MASTER_SNOC_PCNOC] = &mas_snoc_pcnoc,
	[MASTER_QPIC] = &mas_qpic,
	[PCNOC_INT_0] = &pcnoc_int_0,
	[PCNOC_INT_2] = &pcnoc_int_2,
	[PCNOC_INT_3] = &pcnoc_int_3,
	[PCNOC_S_0] = &pcnoc_s_0,
	[PCNOC_S_1] = &pcnoc_s_1,
	[PCNOC_S_2] = &pcnoc_s_2,
	[PCNOC_S_3] = &pcnoc_s_3,
	[PCNOC_S_4] = &pcnoc_s_4,
	[PCNOC_S_6] = &pcnoc_s_6,
	[PCNOC_S_7] = &pcnoc_s_7,
	[PCNOC_S_8] = &pcnoc_s_8,
	[PCNOC_S_9] = &pcnoc_s_9,
	[PCNOC_S_10] = &pcnoc_s_10,
	[PCNOC_S_11] = &pcnoc_s_11,
	[SLAVE_SPDM] = &slv_spdm,
	[SLAVE_PDM] = &slv_pdm,
	[SLAVE_PRNG] = &slv_prng,
	[SLAVE_TCSR] = &slv_tcsr,
	[SLAVE_SNOC_CFG] = &slv_snoc_cfg,
	[SLAVE_MESSAGE_RAM] = &slv_message_ram,
	[SLAVE_DISP_SS_CFG] = &slv_disp_ss_cfg,
	[SLAVE_GPU_CFG] = &slv_gpu_cfg,
	[SLAVE_BLSP_1] = &slv_blsp_1,
	[SLAVE_BLSP_2] = &slv_blsp_2,
	[SLAVE_TLMM_NORTH] = &slv_tlmm_north,
	[SLAVE_PCIE] = &slv_pcie,
	[SLAVE_ETHERNET] = &slv_ethernet,
	[SLAVE_TLMM_EAST] = &slv_tlmm_east,
	[SLAVE_TCU] = &slv_tcu,
	[SLAVE_PMIC_ARB] = &slv_pmic_arb,
	[SLAVE_SDCC_1] = &slv_sdcc_1,
	[SLAVE_SDCC_2] = &slv_sdcc_2,
	[SLAVE_TLMM_SOUTH] = &slv_tlmm_south,
	[SLAVE_USB_HS] = &slv_usb_hs,
	[SLAVE_USB3] = &slv_usb3,
	[SLAVE_CRYPTO_0_CFG] = &slv_crypto_0_cfg,
	[SLAVE_PCNOC_SNOC] = &slv_pcnoc_snoc,
};

static struct qcom_icc_desc qcs404_pcnoc = {
	.nodes = qcs404_pcnoc_nodes,
	.num_nodes = ARRAY_SIZE(qcs404_pcnoc_nodes),
};

static struct qcom_icc_node *qcs404_snoc_nodes[] = {
	[MASTER_QDSS_BAM] = &mas_qdss_bam,
	[MASTER_BIMC_SNOC] = &mas_bimc_snoc,
	[MASTER_PCNOC_SNOC] = &mas_pcnoc_snoc,
	[MASTER_QDSS_ETR] = &mas_qdss_etr,
	[MASTER_EMAC] = &mas_emac,
	[MASTER_PCIE] = &mas_pcie,
	[MASTER_USB3] = &mas_usb3,
	[QDSS_INT] = &qdss_int,
	[SNOC_INT_0] = &snoc_int_0,
	[SNOC_INT_1] = &snoc_int_1,
	[SNOC_INT_2] = &snoc_int_2,
	[SLAVE_KPSS_AHB] = &slv_kpss_ahb,
	[SLAVE_WCSS] = &slv_wcss,
	[SLAVE_SNOC_BIMC_1] = &slv_snoc_bimc_1,
	[SLAVE_IMEM] = &slv_imem,
	[SLAVE_SNOC_PCNOC] = &slv_snoc_pcnoc,
	[SLAVE_QDSS_STM] = &slv_qdss_stm,
	[SLAVE_CATS_0] = &slv_cats_0,
	[SLAVE_CATS_1] = &slv_cats_1,
	[SLAVE_LPASS] = &slv_lpass,
};

static struct qcom_icc_desc qcs404_snoc = {
	.nodes = qcs404_snoc_nodes,
	.num_nodes = ARRAY_SIZE(qcs404_snoc_nodes),
};

static int qcom_icc_set(struct icc_node *src, struct icc_node *dst)
{
	struct qcom_icc_provider *qp;
	struct qcom_icc_node *qn;
	struct icc_provider *provider;
	struct icc_node *n;
	u64 sum_bw;
	u64 max_peak_bw;
	u64 rate;
	u32 agg_avg = 0;
	u32 agg_peak = 0;
	int ret, i;

	qn = src->data;
	provider = src->provider;
	qp = to_qcom_provider(provider);

	list_for_each_entry(n, &provider->nodes, node_list)
		provider->aggregate(n, 0, n->avg_bw, n->peak_bw,
				    &agg_avg, &agg_peak);

	sum_bw = icc_units_to_bps(agg_avg);
	max_peak_bw = icc_units_to_bps(agg_peak);

	/* send bandwidth request message to the RPM processor */
	if (qn->mas_rpm_id != -1) {
		ret = qcom_icc_rpm_smd_send(QCOM_SMD_RPM_ACTIVE_STATE,
					    RPM_BUS_MASTER_REQ,
					    qn->mas_rpm_id,
					    sum_bw);
		if (ret) {
			pr_err("qcom_icc_rpm_smd_send mas %d error %d\n",
			       qn->mas_rpm_id, ret);
			return ret;
		}
	}

	if (qn->slv_rpm_id != -1) {
		ret = qcom_icc_rpm_smd_send(QCOM_SMD_RPM_ACTIVE_STATE,
					    RPM_BUS_SLAVE_REQ,
					    qn->slv_rpm_id,
					    sum_bw);
		if (ret) {
			pr_err("qcom_icc_rpm_smd_send slv error %d\n",
			       ret);
			return ret;
		}
	}

	rate = max(sum_bw, max_peak_bw);

	do_div(rate, qn->buswidth);

	if (qn->rate == rate)
		return 0;

	for (i = 0; i < qp->num_clks; i++) {
		ret = clk_set_rate(qp->bus_clks[i].clk, rate);
		if (ret) {
			pr_err("%s clk_set_rate error: %d\n",
			       qp->bus_clks[i].id, ret);
			return ret;
		}
	}

	qn->rate = rate;

	return 0;
}

static int qnoc_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	const struct qcom_icc_desc *desc;
	struct icc_onecell_data *data;
	struct icc_provider *provider;
	struct qcom_icc_node **qnodes;
	struct qcom_icc_provider *qp;
	struct icc_node *node;
	size_t num_nodes, i;
	int ret;

	/* wait for the RPM proxy */
	if (!qcom_icc_rpm_smd_available())
		return -EPROBE_DEFER;

	desc = of_device_get_match_data(dev);
	if (!desc)
		return -EINVAL;

	qnodes = desc->nodes;
	num_nodes = desc->num_nodes;

	qp = devm_kzalloc(dev, sizeof(*qp), GFP_KERNEL);
	if (!qp)
		return -ENOMEM;

	data = devm_kzalloc(dev, struct_size(data, nodes, num_nodes),
			    GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	qp->bus_clks = devm_kmemdup(dev, bus_clocks, sizeof(bus_clocks),
				    GFP_KERNEL);
	if (!qp->bus_clks)
		return -ENOMEM;

	qp->num_clks = ARRAY_SIZE(bus_clocks);
	ret = devm_clk_bulk_get(dev, qp->num_clks, qp->bus_clks);
	if (ret)
		return ret;

	ret = clk_bulk_prepare_enable(qp->num_clks, qp->bus_clks);
	if (ret)
		return ret;

	provider = &qp->provider;
	INIT_LIST_HEAD(&provider->nodes);
	provider->dev = dev;
	provider->set = qcom_icc_set;
	provider->aggregate = icc_std_aggregate;
	provider->xlate = of_icc_xlate_onecell;
	provider->data = data;

	ret = icc_provider_add(provider);
	if (ret) {
		dev_err(dev, "error adding interconnect provider: %d\n", ret);
		clk_bulk_disable_unprepare(qp->num_clks, qp->bus_clks);
		return ret;
	}

	for (i = 0; i < num_nodes; i++) {
		size_t j;

		node = icc_node_create(qnodes[i]->id);
		if (IS_ERR(node)) {
			ret = PTR_ERR(node);
			goto err;
		}

		node->name = qnodes[i]->name;
		node->data = qnodes[i];
		icc_node_add(node, provider);

		dev_dbg(dev, "registered node %s\n", node->name);

		/* populate links */
		for (j = 0; j < qnodes[i]->num_links; j++)
			icc_link_create(node, qnodes[i]->links[j]);

		data->nodes[i] = node;
	}
	data->num_nodes = num_nodes;

	platform_set_drvdata(pdev, qp);

	return 0;
err:
	icc_nodes_remove(provider);
	clk_bulk_disable_unprepare(qp->num_clks, qp->bus_clks);
	icc_provider_del(provider);

	return ret;
}

static int qnoc_remove(struct platform_device *pdev)
{
	struct qcom_icc_provider *qp = platform_get_drvdata(pdev);

	icc_nodes_remove(&qp->provider);
	clk_bulk_disable_unprepare(qp->num_clks, qp->bus_clks);
	return icc_provider_del(&qp->provider);
}

static const struct of_device_id qcs404_noc_of_match[] = {
	{ .compatible = "qcom,qcs404-bimc", .data = &qcs404_bimc },
	{ .compatible = "qcom,qcs404-pcnoc", .data = &qcs404_pcnoc },
	{ .compatible = "qcom,qcs404-snoc", .data = &qcs404_snoc },
	{ },
};
MODULE_DEVICE_TABLE(of, qcs404_noc_of_match);

static struct platform_driver qcs404_noc_driver = {
	.probe = qnoc_probe,
	.remove = qnoc_remove,
	.driver = {
		.name = "qnoc-qcs404",
		.of_match_table = qcs404_noc_of_match,
	},
};
module_platform_driver(qcs404_noc_driver);
MODULE_DESCRIPTION("Qualcomm QCS404 NoC driver");
MODULE_LICENSE("GPL v2");