[linux-2.6-block.git] / drivers / memory / of_memory.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * OpenFirmware helpers for memory drivers
 *
 * Copyright (C) 2012 Texas Instruments, Inc.
 * Copyright (C) 2019 Samsung Electronics Co., Ltd.
 * Copyright (C) 2020 Krzysztof Kozlowski <krzk@kernel.org>
 */

#include <linux/device.h>
#include <linux/of.h>
#include <linux/gfp.h>
#include <linux/export.h>

#include "jedec_ddr.h"
#include "of_memory.h"

/**
 * of_get_min_tck() - extract min timing values for ddr
 * @np: pointer to ddr device tree node
 * @dev: device requesting for min timing values
 *
 * Populates the lpddr2_min_tck structure by extracting data
 * from device tree node. Returns a pointer to the populated
 * structure. If any error in populating the structure, returns
 * default min timings provided by JEDEC.
 */
const struct lpddr2_min_tck *of_get_min_tck(struct device_node *np,
					    struct device *dev)
{
	int			ret = 0;
	struct lpddr2_min_tck	*min;

	min = devm_kzalloc(dev, sizeof(*min), GFP_KERNEL);
	if (!min)
		goto default_min_tck;

	ret |= of_property_read_u32(np, "tRPab-min-tck", &min->tRPab);
	ret |= of_property_read_u32(np, "tRCD-min-tck", &min->tRCD);
	ret |= of_property_read_u32(np, "tWR-min-tck", &min->tWR);
	ret |= of_property_read_u32(np, "tRASmin-min-tck", &min->tRASmin);
	ret |= of_property_read_u32(np, "tRRD-min-tck", &min->tRRD);
	ret |= of_property_read_u32(np, "tWTR-min-tck", &min->tWTR);
	ret |= of_property_read_u32(np, "tXP-min-tck", &min->tXP);
	ret |= of_property_read_u32(np, "tRTP-min-tck", &min->tRTP);
	ret |= of_property_read_u32(np, "tCKE-min-tck", &min->tCKE);
	ret |= of_property_read_u32(np, "tCKESR-min-tck", &min->tCKESR);
	ret |= of_property_read_u32(np, "tFAW-min-tck", &min->tFAW);

	if (ret) {
		devm_kfree(dev, min);
		goto default_min_tck;
	}

	return min;

default_min_tck:
	dev_warn(dev, "Using default min-tck values\n");
	return &lpddr2_jedec_min_tck;
}
EXPORT_SYMBOL(of_get_min_tck);

static int of_do_get_timings(struct device_node *np,
			     struct lpddr2_timings *tim)
{
	int ret;

	ret = of_property_read_u32(np, "max-freq", &tim->max_freq);
	ret |= of_property_read_u32(np, "min-freq", &tim->min_freq);
	ret |= of_property_read_u32(np, "tRPab", &tim->tRPab);
	ret |= of_property_read_u32(np, "tRCD", &tim->tRCD);
	ret |= of_property_read_u32(np, "tWR", &tim->tWR);
	ret |= of_property_read_u32(np, "tRAS-min", &tim->tRAS_min);
	ret |= of_property_read_u32(np, "tRRD", &tim->tRRD);
	ret |= of_property_read_u32(np, "tWTR", &tim->tWTR);
	ret |= of_property_read_u32(np, "tXP", &tim->tXP);
	ret |= of_property_read_u32(np, "tRTP", &tim->tRTP);
	ret |= of_property_read_u32(np, "tCKESR", &tim->tCKESR);
	ret |= of_property_read_u32(np, "tDQSCK-max", &tim->tDQSCK_max);
	ret |= of_property_read_u32(np, "tFAW", &tim->tFAW);
	ret |= of_property_read_u32(np, "tZQCS", &tim->tZQCS);
	ret |= of_property_read_u32(np, "tZQCL", &tim->tZQCL);
	ret |= of_property_read_u32(np, "tZQinit", &tim->tZQinit);
	ret |= of_property_read_u32(np, "tRAS-max-ns", &tim->tRAS_max_ns);
	ret |= of_property_read_u32(np, "tDQSCK-max-derated",
				    &tim->tDQSCK_max_derated);

	return ret;
}

/**
 * of_get_ddr_timings() - extracts the ddr timings and updates no of
 * frequencies available.
 * @np_ddr: Pointer to ddr device tree node
 * @dev: Device requesting for ddr timings
 * @device_type: Type of ddr(LPDDR2 S2/S4)
 * @nr_frequencies: No of frequencies available for ddr
 * (updated by this function)
 *
 * Populates lpddr2_timings structure by extracting data from device
 * tree node. Returns pointer to populated structure. If any error
 * while populating, returns default timings provided by JEDEC.
 */
const struct lpddr2_timings *of_get_ddr_timings(struct device_node *np_ddr,
						struct device *dev,
						u32 device_type,
						u32 *nr_frequencies)
{
	struct lpddr2_timings	*timings = NULL;
	u32			arr_sz = 0, i = 0;
	struct device_node	*np_tim;
	char			*tim_compat = NULL;

	switch (device_type) {
	case DDR_TYPE_LPDDR2_S2:
	case DDR_TYPE_LPDDR2_S4:
		tim_compat = "jedec,lpddr2-timings";
		break;
	default:
		dev_warn(dev, "Unsupported memory type\n");
	}

	for_each_child_of_node(np_ddr, np_tim)
		if (of_device_is_compatible(np_tim, tim_compat))
			arr_sz++;

	if (arr_sz)
		timings = devm_kcalloc(dev, arr_sz, sizeof(*timings),
				       GFP_KERNEL);

	if (!timings)
		goto default_timings;

	for_each_child_of_node(np_ddr, np_tim) {
		if (of_device_is_compatible(np_tim, tim_compat)) {
			if (of_do_get_timings(np_tim, &timings[i])) {
				devm_kfree(dev, timings);
				goto default_timings;
			}
			i++;
		}
	}

	*nr_frequencies = arr_sz;

	return timings;

default_timings:
	dev_warn(dev, "Using default memory timings\n");
	*nr_frequencies = ARRAY_SIZE(lpddr2_jedec_timings);
	return lpddr2_jedec_timings;
}
EXPORT_SYMBOL(of_get_ddr_timings);

/**
 * of_lpddr3_get_min_tck() - extract min timing values for lpddr3
 * @np: pointer to ddr device tree node
 * @dev: device requesting for min timing values
 *
 * Populates the lpddr3_min_tck structure by extracting data
 * from device tree node. Returns a pointer to the populated
 * structure. If any error in populating the structure, returns NULL.
 */
const struct lpddr3_min_tck *of_lpddr3_get_min_tck(struct device_node *np,
						   struct device *dev)
{
	int			ret = 0;
	struct lpddr3_min_tck	*min;

	min = devm_kzalloc(dev, sizeof(*min), GFP_KERNEL);
	if (!min)
		goto default_min_tck;

	ret |= of_property_read_u32(np, "tRFC-min-tck", &min->tRFC);
	ret |= of_property_read_u32(np, "tRRD-min-tck", &min->tRRD);
	ret |= of_property_read_u32(np, "tRPab-min-tck", &min->tRPab);
	ret |= of_property_read_u32(np, "tRPpb-min-tck", &min->tRPpb);
	ret |= of_property_read_u32(np, "tRCD-min-tck", &min->tRCD);
	ret |= of_property_read_u32(np, "tRC-min-tck", &min->tRC);
	ret |= of_property_read_u32(np, "tRAS-min-tck", &min->tRAS);
	ret |= of_property_read_u32(np, "tWTR-min-tck", &min->tWTR);
	ret |= of_property_read_u32(np, "tWR-min-tck", &min->tWR);
	ret |= of_property_read_u32(np, "tRTP-min-tck", &min->tRTP);
	ret |= of_property_read_u32(np, "tW2W-C2C-min-tck", &min->tW2W_C2C);
	ret |= of_property_read_u32(np, "tR2R-C2C-min-tck", &min->tR2R_C2C);
	ret |= of_property_read_u32(np, "tWL-min-tck", &min->tWL);
	ret |= of_property_read_u32(np, "tDQSCK-min-tck", &min->tDQSCK);
	ret |= of_property_read_u32(np, "tRL-min-tck", &min->tRL);
	ret |= of_property_read_u32(np, "tFAW-min-tck", &min->tFAW);
	ret |= of_property_read_u32(np, "tXSR-min-tck", &min->tXSR);
	ret |= of_property_read_u32(np, "tXP-min-tck", &min->tXP);
	ret |= of_property_read_u32(np, "tCKE-min-tck", &min->tCKE);
	ret |= of_property_read_u32(np, "tCKESR-min-tck", &min->tCKESR);
	ret |= of_property_read_u32(np, "tMRD-min-tck", &min->tMRD);

	if (ret) {
		dev_warn(dev, "Errors while parsing min-tck values\n");
		devm_kfree(dev, min);
		goto default_min_tck;
	}

	return min;

default_min_tck:
	dev_warn(dev, "Using default min-tck values\n");
	return NULL;
}
EXPORT_SYMBOL(of_lpddr3_get_min_tck);

static int of_lpddr3_do_get_timings(struct device_node *np,
				    struct lpddr3_timings *tim)
{
	int ret;

	ret = of_property_read_u32(np, "max-freq", &tim->max_freq);
	if (ret)
		/* Deprecated way of passing max-freq as 'reg' */
		ret = of_property_read_u32(np, "reg", &tim->max_freq);
	ret |= of_property_read_u32(np, "min-freq", &tim->min_freq);
	ret |= of_property_read_u32(np, "tRFC", &tim->tRFC);
	ret |= of_property_read_u32(np, "tRRD", &tim->tRRD);
	ret |= of_property_read_u32(np, "tRPab", &tim->tRPab);
	ret |= of_property_read_u32(np, "tRPpb", &tim->tRPpb);
	ret |= of_property_read_u32(np, "tRCD", &tim->tRCD);
	ret |= of_property_read_u32(np, "tRC", &tim->tRC);
	ret |= of_property_read_u32(np, "tRAS", &tim->tRAS);
	ret |= of_property_read_u32(np, "tWTR", &tim->tWTR);
	ret |= of_property_read_u32(np, "tWR", &tim->tWR);
	ret |= of_property_read_u32(np, "tRTP", &tim->tRTP);
	ret |= of_property_read_u32(np, "tW2W-C2C", &tim->tW2W_C2C);
	ret |= of_property_read_u32(np, "tR2R-C2C", &tim->tR2R_C2C);
	ret |= of_property_read_u32(np, "tFAW", &tim->tFAW);
	ret |= of_property_read_u32(np, "tXSR", &tim->tXSR);
	ret |= of_property_read_u32(np, "tXP", &tim->tXP);
	ret |= of_property_read_u32(np, "tCKE", &tim->tCKE);
	ret |= of_property_read_u32(np, "tCKESR", &tim->tCKESR);
	ret |= of_property_read_u32(np, "tMRD", &tim->tMRD);

	return ret;
}

/**
 * of_lpddr3_get_ddr_timings() - extracts the lpddr3 timings and updates no of
 * frequencies available.
 * @np_ddr: Pointer to ddr device tree node
 * @dev: Device requesting for ddr timings
 * @device_type: Type of ddr
 * @nr_frequencies: No of frequencies available for ddr
 * (updated by this function)
 *
 * Populates lpddr3_timings structure by extracting data from device
 * tree node. Returns pointer to populated structure. If any error
 * while populating, returns NULL.
 */
const struct lpddr3_timings
*of_lpddr3_get_ddr_timings(struct device_node *np_ddr, struct device *dev,
			   u32 device_type, u32 *nr_frequencies)
{
	struct lpddr3_timings	*timings = NULL;
	u32			arr_sz = 0, i = 0;
	struct device_node	*np_tim;
	char			*tim_compat = NULL;

	switch (device_type) {
	case DDR_TYPE_LPDDR3:
		tim_compat = "jedec,lpddr3-timings";
		break;
	default:
		dev_warn(dev, "Unsupported memory type\n");
	}

	for_each_child_of_node(np_ddr, np_tim)
		if (of_device_is_compatible(np_tim, tim_compat))
			arr_sz++;

	if (arr_sz)
		timings = devm_kcalloc(dev, arr_sz, sizeof(*timings),
				       GFP_KERNEL);

	if (!timings)
		goto default_timings;

	for_each_child_of_node(np_ddr, np_tim) {
		if (of_device_is_compatible(np_tim, tim_compat)) {
			if (of_lpddr3_do_get_timings(np_tim, &timings[i])) {
				devm_kfree(dev, timings);
				goto default_timings;
			}
			i++;
		}
	}

	*nr_frequencies = arr_sz;

	return timings;

default_timings:
	dev_warn(dev, "Failed to get timings\n");
	*nr_frequencies = 0;
	return NULL;
}
EXPORT_SYMBOL(of_lpddr3_get_ddr_timings);

/**
 * of_lpddr2_get_info() - extracts information about the lpddr2 chip.
 * @np: Pointer to device tree node containing lpddr2 info
 * @dev: Device requesting info
 *
 * Populates lpddr2_info structure by extracting data from device
 * tree node. Returns pointer to populated structure. If error
 * happened while populating, returns NULL. If property is missing
 * in a device-tree, then the corresponding value is set to -ENOENT.
 */
const struct lpddr2_info
*of_lpddr2_get_info(struct device_node *np, struct device *dev)
{
	struct lpddr2_info *ret_info, info = {};
	struct property *prop;
	const char *cp;
	int err;
	u32 revision_id[2];

	err = of_property_read_u32_array(np, "revision-id", revision_id, 2);
	if (!err) {
		info.revision_id1 = revision_id[0];
		info.revision_id2 = revision_id[1];
	} else {
		err = of_property_read_u32(np, "revision-id1", &info.revision_id1);
		if (err)
			info.revision_id1 = -ENOENT;

		err = of_property_read_u32(np, "revision-id2", &info.revision_id2);
		if (err)
			info.revision_id2 = -ENOENT;
	}

	err = of_property_read_u32(np, "io-width", &info.io_width);
	if (err)
		return NULL;

	info.io_width = 32 / info.io_width - 1;

	err = of_property_read_u32(np, "density", &info.density);
	if (err)
		return NULL;

	info.density = ffs(info.density) - 7;

	if (of_device_is_compatible(np, "jedec,lpddr2-s4"))
		info.arch_type = LPDDR2_TYPE_S4;
	else if (of_device_is_compatible(np, "jedec,lpddr2-s2"))
		info.arch_type = LPDDR2_TYPE_S2;
	else if (of_device_is_compatible(np, "jedec,lpddr2-nvm"))
		info.arch_type = LPDDR2_TYPE_NVM;
	else
		return NULL;

	prop = of_find_property(np, "compatible", NULL);
	for (cp = of_prop_next_string(prop, NULL); cp;
	     cp = of_prop_next_string(prop, cp)) {

#define OF_LPDDR2_VENDOR_CMP(compat, ID) \
		if (!of_compat_cmp(cp, compat ",", strlen(compat ","))) { \
			info.manufacturer_id = LPDDR2_MANID_##ID; \
			break; \
		}

		OF_LPDDR2_VENDOR_CMP("samsung", SAMSUNG)
		OF_LPDDR2_VENDOR_CMP("qimonda", QIMONDA)
		OF_LPDDR2_VENDOR_CMP("elpida", ELPIDA)
		OF_LPDDR2_VENDOR_CMP("etron", ETRON)
		OF_LPDDR2_VENDOR_CMP("nanya", NANYA)
		OF_LPDDR2_VENDOR_CMP("hynix", HYNIX)
		OF_LPDDR2_VENDOR_CMP("mosel", MOSEL)
		OF_LPDDR2_VENDOR_CMP("winbond", WINBOND)
		OF_LPDDR2_VENDOR_CMP("esmt", ESMT)
		OF_LPDDR2_VENDOR_CMP("spansion", SPANSION)
		OF_LPDDR2_VENDOR_CMP("sst", SST)
		OF_LPDDR2_VENDOR_CMP("zmos", ZMOS)
		OF_LPDDR2_VENDOR_CMP("intel", INTEL)
		OF_LPDDR2_VENDOR_CMP("numonyx", NUMONYX)
		OF_LPDDR2_VENDOR_CMP("micron", MICRON)

#undef OF_LPDDR2_VENDOR_CMP
	}

	if (!info.manufacturer_id)
		info.manufacturer_id = -ENOENT;

	ret_info = devm_kzalloc(dev, sizeof(*ret_info), GFP_KERNEL);
	if (ret_info)
		*ret_info = info;

	return ret_info;
}
EXPORT_SYMBOL(of_lpddr2_get_info);
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
e6b42eb6 A	2	/*
	3	* OpenFirmware helpers for memory drivers
	4	*
	5	* Copyright (C) 2012 Texas Instruments, Inc.
976897dd	6	* Copyright (C) 2019 Samsung Electronics Co., Ltd.
efc46463	7	* Copyright (C) 2020 Krzysztof Kozlowski <krzk@kernel.org>
e6b42eb6 A	8	*/
	9
	10	#include <linux/device.h>
e6b42eb6 A	11	#include <linux/of.h>
e6b42eb6 A	12	#include <linux/gfp.h>
e6b42eb6	13	#include <linux/export.h>
5ec47cda MY	14
5ec47cda MY	15	#include "jedec_ddr.h"
aeb83d70	16	#include "of_memory.h"
e6b42eb6 A	17
	18	/**
	19	* of_get_min_tck() - extract min timing values for ddr
	20	* @np: pointer to ddr device tree node
46c71118	21	* @dev: device requesting for min timing values
e6b42eb6 A	22	*
	23	* Populates the lpddr2_min_tck structure by extracting data
	24	* from device tree node. Returns a pointer to the populated
	25	* structure. If any error in populating the structure, returns
	26	* default min timings provided by JEDEC.
	27	*/
	28	const struct lpddr2_min_tck of_get_min_tck(struct device_node np,
9825095a	29	struct device *dev)
e6b42eb6 A	30	{
	31	int ret = 0;
	32	struct lpddr2_min_tck *min;
	33
	34	min = devm_kzalloc(dev, sizeof(*min), GFP_KERNEL);
	35	if (!min)
	36	goto default_min_tck;
	37
	38	ret \|= of_property_read_u32(np, "tRPab-min-tck", &min->tRPab);
	39	ret \|= of_property_read_u32(np, "tRCD-min-tck", &min->tRCD);
	40	ret \|= of_property_read_u32(np, "tWR-min-tck", &min->tWR);
	41	ret \|= of_property_read_u32(np, "tRASmin-min-tck", &min->tRASmin);
	42	ret \|= of_property_read_u32(np, "tRRD-min-tck", &min->tRRD);
	43	ret \|= of_property_read_u32(np, "tWTR-min-tck", &min->tWTR);
	44	ret \|= of_property_read_u32(np, "tXP-min-tck", &min->tXP);
	45	ret \|= of_property_read_u32(np, "tRTP-min-tck", &min->tRTP);
	46	ret \|= of_property_read_u32(np, "tCKE-min-tck", &min->tCKE);
	47	ret \|= of_property_read_u32(np, "tCKESR-min-tck", &min->tCKESR);
	48	ret \|= of_property_read_u32(np, "tFAW-min-tck", &min->tFAW);
	49
	50	if (ret) {
	51	devm_kfree(dev, min);
	52	goto default_min_tck;
	53	}
	54
	55	return min;
	56
	57	default_min_tck:
efc46463	58	dev_warn(dev, "Using default min-tck values\n");
e6b42eb6 A	59	return &lpddr2_jedec_min_tck;
	60	}
	61	EXPORT_SYMBOL(of_get_min_tck);
	62
	63	static int of_do_get_timings(struct device_node *np,
9825095a	64	struct lpddr2_timings *tim)
e6b42eb6 A	65	{
	66	int ret;
	67
	68	ret = of_property_read_u32(np, "max-freq", &tim->max_freq);
	69	ret \|= of_property_read_u32(np, "min-freq", &tim->min_freq);
	70	ret \|= of_property_read_u32(np, "tRPab", &tim->tRPab);
	71	ret \|= of_property_read_u32(np, "tRCD", &tim->tRCD);
	72	ret \|= of_property_read_u32(np, "tWR", &tim->tWR);
	73	ret \|= of_property_read_u32(np, "tRAS-min", &tim->tRAS_min);
	74	ret \|= of_property_read_u32(np, "tRRD", &tim->tRRD);
	75	ret \|= of_property_read_u32(np, "tWTR", &tim->tWTR);
	76	ret \|= of_property_read_u32(np, "tXP", &tim->tXP);
	77	ret \|= of_property_read_u32(np, "tRTP", &tim->tRTP);
	78	ret \|= of_property_read_u32(np, "tCKESR", &tim->tCKESR);
	79	ret \|= of_property_read_u32(np, "tDQSCK-max", &tim->tDQSCK_max);
	80	ret \|= of_property_read_u32(np, "tFAW", &tim->tFAW);
	81	ret \|= of_property_read_u32(np, "tZQCS", &tim->tZQCS);
	82	ret \|= of_property_read_u32(np, "tZQCL", &tim->tZQCL);
	83	ret \|= of_property_read_u32(np, "tZQinit", &tim->tZQinit);
	84	ret \|= of_property_read_u32(np, "tRAS-max-ns", &tim->tRAS_max_ns);
	85	ret \|= of_property_read_u32(np, "tDQSCK-max-derated",
9825095a	86	&tim->tDQSCK_max_derated);
e6b42eb6 A	87
	88	return ret;
	89	}
	90
	91	/**
	92	* of_get_ddr_timings() - extracts the ddr timings and updates no of
	93	* frequencies available.
	94	* @np_ddr: Pointer to ddr device tree node
	95	* @dev: Device requesting for ddr timings
	96	* @device_type: Type of ddr(LPDDR2 S2/S4)
	97	* @nr_frequencies: No of frequencies available for ddr
	98	* (updated by this function)
	99	*
	100	* Populates lpddr2_timings structure by extracting data from device
	101	* tree node. Returns pointer to populated structure. If any error
	102	* while populating, returns default timings provided by JEDEC.
	103	*/
	104	const struct lpddr2_timings of_get_ddr_timings(struct device_node np_ddr,
9825095a KK	105	struct device *dev,
	106	u32 device_type,
	107	u32 *nr_frequencies)
e6b42eb6 A	108	{
	109	struct lpddr2_timings *timings = NULL;
	110	u32 arr_sz = 0, i = 0;
	111	struct device_node *np_tim;
ae53e374	112	char *tim_compat = NULL;
e6b42eb6 A	113
	114	switch (device_type) {
	115	case DDR_TYPE_LPDDR2_S2:
	116	case DDR_TYPE_LPDDR2_S4:
	117	tim_compat = "jedec,lpddr2-timings";
	118	break;
	119	default:
efc46463	120	dev_warn(dev, "Unsupported memory type\n");
e6b42eb6 A	121	}
	122
	123	for_each_child_of_node(np_ddr, np_tim)
	124	if (of_device_is_compatible(np_tim, tim_compat))
	125	arr_sz++;
	126
	127	if (arr_sz)
a86854d0 KC	128	timings = devm_kcalloc(dev, arr_sz, sizeof(*timings),
a86854d0 KC	129	GFP_KERNEL);
e6b42eb6 A	130
	131	if (!timings)
	132	goto default_timings;
	133
	134	for_each_child_of_node(np_ddr, np_tim) {
	135	if (of_device_is_compatible(np_tim, tim_compat)) {
	136	if (of_do_get_timings(np_tim, &timings[i])) {
	137	devm_kfree(dev, timings);
	138	goto default_timings;
	139	}
	140	i++;
	141	}
	142	}
	143
	144	*nr_frequencies = arr_sz;
	145
	146	return timings;
	147
	148	default_timings:
efc46463	149	dev_warn(dev, "Using default memory timings\n");
e6b42eb6 A	150	*nr_frequencies = ARRAY_SIZE(lpddr2_jedec_timings);
	151	return lpddr2_jedec_timings;
	152	}
	153	EXPORT_SYMBOL(of_get_ddr_timings);
976897dd LL	154
	155	/**
	156	* of_lpddr3_get_min_tck() - extract min timing values for lpddr3
	157	* @np: pointer to ddr device tree node
46c71118	158	* @dev: device requesting for min timing values
976897dd LL	159	*
	160	* Populates the lpddr3_min_tck structure by extracting data
	161	* from device tree node. Returns a pointer to the populated
	162	* structure. If any error in populating the structure, returns NULL.
	163	*/
	164	const struct lpddr3_min_tck of_lpddr3_get_min_tck(struct device_node np,
	165	struct device *dev)
	166	{
	167	int ret = 0;
	168	struct lpddr3_min_tck *min;
	169
	170	min = devm_kzalloc(dev, sizeof(*min), GFP_KERNEL);
	171	if (!min)
	172	goto default_min_tck;
	173
	174	ret \|= of_property_read_u32(np, "tRFC-min-tck", &min->tRFC);
	175	ret \|= of_property_read_u32(np, "tRRD-min-tck", &min->tRRD);
	176	ret \|= of_property_read_u32(np, "tRPab-min-tck", &min->tRPab);
	177	ret \|= of_property_read_u32(np, "tRPpb-min-tck", &min->tRPpb);
	178	ret \|= of_property_read_u32(np, "tRCD-min-tck", &min->tRCD);
	179	ret \|= of_property_read_u32(np, "tRC-min-tck", &min->tRC);
	180	ret \|= of_property_read_u32(np, "tRAS-min-tck", &min->tRAS);
	181	ret \|= of_property_read_u32(np, "tWTR-min-tck", &min->tWTR);
	182	ret \|= of_property_read_u32(np, "tWR-min-tck", &min->tWR);
	183	ret \|= of_property_read_u32(np, "tRTP-min-tck", &min->tRTP);
	184	ret \|= of_property_read_u32(np, "tW2W-C2C-min-tck", &min->tW2W_C2C);
	185	ret \|= of_property_read_u32(np, "tR2R-C2C-min-tck", &min->tR2R_C2C);
	186	ret \|= of_property_read_u32(np, "tWL-min-tck", &min->tWL);
	187	ret \|= of_property_read_u32(np, "tDQSCK-min-tck", &min->tDQSCK);
	188	ret \|= of_property_read_u32(np, "tRL-min-tck", &min->tRL);
	189	ret \|= of_property_read_u32(np, "tFAW-min-tck", &min->tFAW);
	190	ret \|= of_property_read_u32(np, "tXSR-min-tck", &min->tXSR);
	191	ret \|= of_property_read_u32(np, "tXP-min-tck", &min->tXP);
	192	ret \|= of_property_read_u32(np, "tCKE-min-tck", &min->tCKE);
	193	ret \|= of_property_read_u32(np, "tCKESR-min-tck", &min->tCKESR);
	194	ret \|= of_property_read_u32(np, "tMRD-min-tck", &min->tMRD);
	195
	196	if (ret) {
efc46463	197	dev_warn(dev, "Errors while parsing min-tck values\n");
976897dd LL	198	devm_kfree(dev, min);
	199	goto default_min_tck;
	200	}
	201
	202	return min;
	203
	204	default_min_tck:
efc46463	205	dev_warn(dev, "Using default min-tck values\n");
976897dd LL	206	return NULL;
	207	}
	208	EXPORT_SYMBOL(of_lpddr3_get_min_tck);
	209
	210	static int of_lpddr3_do_get_timings(struct device_node *np,
	211	struct lpddr3_timings *tim)
	212	{
	213	int ret;
	214
4e890b22 KK	215	ret = of_property_read_u32(np, "max-freq", &tim->max_freq);
	216	if (ret)
	217	/* Deprecated way of passing max-freq as 'reg' */
	218	ret = of_property_read_u32(np, "reg", &tim->max_freq);
976897dd LL	219	ret \|= of_property_read_u32(np, "min-freq", &tim->min_freq);
	220	ret \|= of_property_read_u32(np, "tRFC", &tim->tRFC);
	221	ret \|= of_property_read_u32(np, "tRRD", &tim->tRRD);
	222	ret \|= of_property_read_u32(np, "tRPab", &tim->tRPab);
	223	ret \|= of_property_read_u32(np, "tRPpb", &tim->tRPpb);
	224	ret \|= of_property_read_u32(np, "tRCD", &tim->tRCD);
	225	ret \|= of_property_read_u32(np, "tRC", &tim->tRC);
	226	ret \|= of_property_read_u32(np, "tRAS", &tim->tRAS);
	227	ret \|= of_property_read_u32(np, "tWTR", &tim->tWTR);
	228	ret \|= of_property_read_u32(np, "tWR", &tim->tWR);
	229	ret \|= of_property_read_u32(np, "tRTP", &tim->tRTP);
	230	ret \|= of_property_read_u32(np, "tW2W-C2C", &tim->tW2W_C2C);
	231	ret \|= of_property_read_u32(np, "tR2R-C2C", &tim->tR2R_C2C);
	232	ret \|= of_property_read_u32(np, "tFAW", &tim->tFAW);
	233	ret \|= of_property_read_u32(np, "tXSR", &tim->tXSR);
	234	ret \|= of_property_read_u32(np, "tXP", &tim->tXP);
	235	ret \|= of_property_read_u32(np, "tCKE", &tim->tCKE);
	236	ret \|= of_property_read_u32(np, "tCKESR", &tim->tCKESR);
	237	ret \|= of_property_read_u32(np, "tMRD", &tim->tMRD);
	238
	239	return ret;
	240	}
	241
	242	/**
	243	* of_lpddr3_get_ddr_timings() - extracts the lpddr3 timings and updates no of
	244	* frequencies available.
	245	* @np_ddr: Pointer to ddr device tree node
	246	* @dev: Device requesting for ddr timings
	247	* @device_type: Type of ddr
	248	* @nr_frequencies: No of frequencies available for ddr
	249	* (updated by this function)
	250	*
	251	* Populates lpddr3_timings structure by extracting data from device
	252	* tree node. Returns pointer to populated structure. If any error
	253	* while populating, returns NULL.
	254	*/
	255	const struct lpddr3_timings
	256	of_lpddr3_get_ddr_timings(struct device_node np_ddr, struct device *dev,
	257	u32 device_type, u32 *nr_frequencies)
	258	{
	259	struct lpddr3_timings *timings = NULL;
	260	u32 arr_sz = 0, i = 0;
	261	struct device_node *np_tim;
	262	char *tim_compat = NULL;
	263
	264	switch (device_type) {
	265	case DDR_TYPE_LPDDR3:
	266	tim_compat = "jedec,lpddr3-timings";
	267	break;
	268	default:
efc46463	269	dev_warn(dev, "Unsupported memory type\n");
976897dd LL	270	}
	271
	272	for_each_child_of_node(np_ddr, np_tim)
	273	if (of_device_is_compatible(np_tim, tim_compat))
	274	arr_sz++;
	275
	276	if (arr_sz)
	277	timings = devm_kcalloc(dev, arr_sz, sizeof(*timings),
	278	GFP_KERNEL);
	279
	280	if (!timings)
	281	goto default_timings;
	282
	283	for_each_child_of_node(np_ddr, np_tim) {
	284	if (of_device_is_compatible(np_tim, tim_compat)) {
	285	if (of_lpddr3_do_get_timings(np_tim, &timings[i])) {
	286	devm_kfree(dev, timings);
	287	goto default_timings;
	288	}
	289	i++;
	290	}
	291	}
	292
	293	*nr_frequencies = arr_sz;
	294
	295	return timings;
	296
	297	default_timings:
efc46463	298	dev_warn(dev, "Failed to get timings\n");
976897dd LL	299	*nr_frequencies = 0;
	300	return NULL;
	301	}
	302	EXPORT_SYMBOL(of_lpddr3_get_ddr_timings);
38322cf4 DO	303
	304	/**
	305	* of_lpddr2_get_info() - extracts information about the lpddr2 chip.
	306	* @np: Pointer to device tree node containing lpddr2 info
	307	* @dev: Device requesting info
	308	*
	309	* Populates lpddr2_info structure by extracting data from device
	310	* tree node. Returns pointer to populated structure. If error
	311	* happened while populating, returns NULL. If property is missing
	312	* in a device-tree, then the corresponding value is set to -ENOENT.
	313	*/
	314	const struct lpddr2_info
	315	of_lpddr2_get_info(struct device_node np, struct device *dev)
	316	{
	317	struct lpddr2_info *ret_info, info = {};
	318	struct property *prop;
	319	const char *cp;
	320	int err;
a06bf59d JW	321	u32 revision_id[2];
	322
	323	err = of_property_read_u32_array(np, "revision-id", revision_id, 2);
	324	if (!err) {
	325	info.revision_id1 = revision_id[0];
	326	info.revision_id2 = revision_id[1];
	327	} else {
	328	err = of_property_read_u32(np, "revision-id1", &info.revision_id1);
	329	if (err)
	330	info.revision_id1 = -ENOENT;
	331
	332	err = of_property_read_u32(np, "revision-id2", &info.revision_id2);
	333	if (err)
	334	info.revision_id2 = -ENOENT;
	335	}
38322cf4 DO	336
	337	err = of_property_read_u32(np, "io-width", &info.io_width);
	338	if (err)
	339	return NULL;
	340
	341	info.io_width = 32 / info.io_width - 1;
	342
	343	err = of_property_read_u32(np, "density", &info.density);
	344	if (err)
	345	return NULL;
	346
	347	info.density = ffs(info.density) - 7;
	348
	349	if (of_device_is_compatible(np, "jedec,lpddr2-s4"))
	350	info.arch_type = LPDDR2_TYPE_S4;
	351	else if (of_device_is_compatible(np, "jedec,lpddr2-s2"))
	352	info.arch_type = LPDDR2_TYPE_S2;
	353	else if (of_device_is_compatible(np, "jedec,lpddr2-nvm"))
	354	info.arch_type = LPDDR2_TYPE_NVM;
	355	else
	356	return NULL;
	357
	358	prop = of_find_property(np, "compatible", NULL);
	359	for (cp = of_prop_next_string(prop, NULL); cp;
	360	cp = of_prop_next_string(prop, cp)) {
	361
	362	#define OF_LPDDR2_VENDOR_CMP(compat, ID) \
	363	if (!of_compat_cmp(cp, compat ",", strlen(compat ","))) { \
	364	info.manufacturer_id = LPDDR2_MANID_##ID; \
	365	break; \
	366	}
	367
	368	OF_LPDDR2_VENDOR_CMP("samsung", SAMSUNG)
	369	OF_LPDDR2_VENDOR_CMP("qimonda", QIMONDA)
	370	OF_LPDDR2_VENDOR_CMP("elpida", ELPIDA)
	371	OF_LPDDR2_VENDOR_CMP("etron", ETRON)
	372	OF_LPDDR2_VENDOR_CMP("nanya", NANYA)
	373	OF_LPDDR2_VENDOR_CMP("hynix", HYNIX)
	374	OF_LPDDR2_VENDOR_CMP("mosel", MOSEL)
	375	OF_LPDDR2_VENDOR_CMP("winbond", WINBOND)
	376	OF_LPDDR2_VENDOR_CMP("esmt", ESMT)
	377	OF_LPDDR2_VENDOR_CMP("spansion", SPANSION)
	378	OF_LPDDR2_VENDOR_CMP("sst", SST)
	379	OF_LPDDR2_VENDOR_CMP("zmos", ZMOS)
	380	OF_LPDDR2_VENDOR_CMP("intel", INTEL)
	381	OF_LPDDR2_VENDOR_CMP("numonyx", NUMONYX)
	382	OF_LPDDR2_VENDOR_CMP("micron", MICRON)
	383
	384	#undef OF_LPDDR2_VENDOR_CMP
	385	}
	386
	387	if (!info.manufacturer_id)
	388	info.manufacturer_id = -ENOENT;
	389
	390	ret_info = devm_kzalloc(dev, sizeof(*ret_info), GFP_KERNEL);
	391	if (ret_info)
	392	*ret_info = info;
	393
	394	return ret_info;
	395	}
	396	EXPORT_SYMBOL(of_lpddr2_get_info);