2019-05-27 09:55:01 +03:00
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// SPDX-License-Identifier: GPL-2.0-or-later
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2012-08-17 12:35:15 +04:00
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/*
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* OpenFirmware helpers for memory drivers
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*
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* Copyright (C) 2012 Texas Instruments, Inc.
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2019-08-21 13:42:58 +03:00
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* Copyright (C) 2019 Samsung Electronics Co., Ltd.
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2020-07-24 10:40:17 +03:00
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* Copyright (C) 2020 Krzysztof Kozlowski <krzk@kernel.org>
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2012-08-17 12:35:15 +04:00
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*/
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#include <linux/device.h>
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#include <linux/of.h>
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#include <linux/gfp.h>
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#include <linux/export.h>
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2019-06-03 11:12:33 +03:00
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#include "jedec_ddr.h"
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2016-08-27 20:31:28 +03:00
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#include "of_memory.h"
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2012-08-17 12:35:15 +04:00
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/**
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* of_get_min_tck() - extract min timing values for ddr
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* @np: pointer to ddr device tree node
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2020-07-24 21:23:25 +03:00
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* @dev: device requesting for min timing values
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2012-08-17 12:35:15 +04:00
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*
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* Populates the lpddr2_min_tck structure by extracting data
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* from device tree node. Returns a pointer to the populated
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* structure. If any error in populating the structure, returns
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* default min timings provided by JEDEC.
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*/
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const struct lpddr2_min_tck *of_get_min_tck(struct device_node *np,
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2020-07-24 10:40:18 +03:00
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struct device *dev)
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2012-08-17 12:35:15 +04:00
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{
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int ret = 0;
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struct lpddr2_min_tck *min;
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min = devm_kzalloc(dev, sizeof(*min), GFP_KERNEL);
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if (!min)
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goto default_min_tck;
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ret |= of_property_read_u32(np, "tRPab-min-tck", &min->tRPab);
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ret |= of_property_read_u32(np, "tRCD-min-tck", &min->tRCD);
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ret |= of_property_read_u32(np, "tWR-min-tck", &min->tWR);
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ret |= of_property_read_u32(np, "tRASmin-min-tck", &min->tRASmin);
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ret |= of_property_read_u32(np, "tRRD-min-tck", &min->tRRD);
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ret |= of_property_read_u32(np, "tWTR-min-tck", &min->tWTR);
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ret |= of_property_read_u32(np, "tXP-min-tck", &min->tXP);
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ret |= of_property_read_u32(np, "tRTP-min-tck", &min->tRTP);
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ret |= of_property_read_u32(np, "tCKE-min-tck", &min->tCKE);
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ret |= of_property_read_u32(np, "tCKESR-min-tck", &min->tCKESR);
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ret |= of_property_read_u32(np, "tFAW-min-tck", &min->tFAW);
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if (ret) {
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devm_kfree(dev, min);
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goto default_min_tck;
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}
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return min;
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default_min_tck:
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2020-07-24 10:40:17 +03:00
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dev_warn(dev, "Using default min-tck values\n");
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2012-08-17 12:35:15 +04:00
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return &lpddr2_jedec_min_tck;
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}
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EXPORT_SYMBOL(of_get_min_tck);
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static int of_do_get_timings(struct device_node *np,
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2020-07-24 10:40:18 +03:00
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struct lpddr2_timings *tim)
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2012-08-17 12:35:15 +04:00
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{
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int ret;
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ret = of_property_read_u32(np, "max-freq", &tim->max_freq);
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ret |= of_property_read_u32(np, "min-freq", &tim->min_freq);
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ret |= of_property_read_u32(np, "tRPab", &tim->tRPab);
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ret |= of_property_read_u32(np, "tRCD", &tim->tRCD);
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ret |= of_property_read_u32(np, "tWR", &tim->tWR);
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ret |= of_property_read_u32(np, "tRAS-min", &tim->tRAS_min);
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ret |= of_property_read_u32(np, "tRRD", &tim->tRRD);
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ret |= of_property_read_u32(np, "tWTR", &tim->tWTR);
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ret |= of_property_read_u32(np, "tXP", &tim->tXP);
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ret |= of_property_read_u32(np, "tRTP", &tim->tRTP);
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ret |= of_property_read_u32(np, "tCKESR", &tim->tCKESR);
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ret |= of_property_read_u32(np, "tDQSCK-max", &tim->tDQSCK_max);
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ret |= of_property_read_u32(np, "tFAW", &tim->tFAW);
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ret |= of_property_read_u32(np, "tZQCS", &tim->tZQCS);
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ret |= of_property_read_u32(np, "tZQCL", &tim->tZQCL);
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ret |= of_property_read_u32(np, "tZQinit", &tim->tZQinit);
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ret |= of_property_read_u32(np, "tRAS-max-ns", &tim->tRAS_max_ns);
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ret |= of_property_read_u32(np, "tDQSCK-max-derated",
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2020-07-24 10:40:18 +03:00
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&tim->tDQSCK_max_derated);
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2012-08-17 12:35:15 +04:00
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return ret;
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}
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/**
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* of_get_ddr_timings() - extracts the ddr timings and updates no of
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* frequencies available.
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* @np_ddr: Pointer to ddr device tree node
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* @dev: Device requesting for ddr timings
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* @device_type: Type of ddr(LPDDR2 S2/S4)
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* @nr_frequencies: No of frequencies available for ddr
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* (updated by this function)
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*
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* Populates lpddr2_timings structure by extracting data from device
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* tree node. Returns pointer to populated structure. If any error
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* while populating, returns default timings provided by JEDEC.
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*/
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const struct lpddr2_timings *of_get_ddr_timings(struct device_node *np_ddr,
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2020-07-24 10:40:18 +03:00
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struct device *dev,
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u32 device_type,
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u32 *nr_frequencies)
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2012-08-17 12:35:15 +04:00
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{
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struct lpddr2_timings *timings = NULL;
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u32 arr_sz = 0, i = 0;
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struct device_node *np_tim;
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2016-04-15 17:50:32 +03:00
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char *tim_compat = NULL;
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2012-08-17 12:35:15 +04:00
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switch (device_type) {
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case DDR_TYPE_LPDDR2_S2:
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case DDR_TYPE_LPDDR2_S4:
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tim_compat = "jedec,lpddr2-timings";
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break;
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default:
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2020-07-24 10:40:17 +03:00
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dev_warn(dev, "Unsupported memory type\n");
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2012-08-17 12:35:15 +04:00
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}
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for_each_child_of_node(np_ddr, np_tim)
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if (of_device_is_compatible(np_tim, tim_compat))
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arr_sz++;
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if (arr_sz)
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treewide: devm_kzalloc() -> devm_kcalloc()
The devm_kzalloc() function has a 2-factor argument form, devm_kcalloc().
This patch replaces cases of:
devm_kzalloc(handle, a * b, gfp)
with:
devm_kcalloc(handle, a * b, gfp)
as well as handling cases of:
devm_kzalloc(handle, a * b * c, gfp)
with:
devm_kzalloc(handle, array3_size(a, b, c), gfp)
as it's slightly less ugly than:
devm_kcalloc(handle, array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
devm_kzalloc(handle, 4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
Some manual whitespace fixes were needed in this patch, as Coccinelle
really liked to write "=devm_kcalloc..." instead of "= devm_kcalloc...".
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
expression HANDLE;
type TYPE;
expression THING, E;
@@
(
devm_kzalloc(HANDLE,
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
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devm_kzalloc(HANDLE,
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression HANDLE;
expression COUNT;
typedef u8;
typedef __u8;
@@
(
devm_kzalloc(HANDLE,
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
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devm_kzalloc(HANDLE,
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
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devm_kzalloc(HANDLE,
- sizeof(char) * (COUNT)
+ COUNT
, ...)
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devm_kzalloc(HANDLE,
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
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devm_kzalloc(HANDLE,
- sizeof(u8) * COUNT
+ COUNT
, ...)
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devm_kzalloc(HANDLE,
- sizeof(__u8) * COUNT
+ COUNT
, ...)
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devm_kzalloc(HANDLE,
- sizeof(char) * COUNT
+ COUNT
, ...)
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devm_kzalloc(HANDLE,
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
expression HANDLE;
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
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- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
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- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
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- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
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- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
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- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
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- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
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- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
expression HANDLE;
identifier SIZE, COUNT;
@@
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression HANDLE;
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
devm_kzalloc(HANDLE,
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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devm_kzalloc(HANDLE,
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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devm_kzalloc(HANDLE,
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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devm_kzalloc(HANDLE,
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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devm_kzalloc(HANDLE,
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
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devm_kzalloc(HANDLE,
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
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devm_kzalloc(HANDLE,
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
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devm_kzalloc(HANDLE,
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression HANDLE;
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
devm_kzalloc(HANDLE,
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
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devm_kzalloc(HANDLE,
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
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devm_kzalloc(HANDLE,
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
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devm_kzalloc(HANDLE,
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
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devm_kzalloc(HANDLE,
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
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devm_kzalloc(HANDLE,
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
expression HANDLE;
identifier STRIDE, SIZE, COUNT;
@@
(
devm_kzalloc(HANDLE,
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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devm_kzalloc(HANDLE,
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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devm_kzalloc(HANDLE,
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
devm_kzalloc(HANDLE,
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
devm_kzalloc(HANDLE,
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
devm_kzalloc(HANDLE,
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
devm_kzalloc(HANDLE,
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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devm_kzalloc(HANDLE,
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression HANDLE;
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
|
devm_kzalloc(HANDLE,
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
devm_kzalloc(HANDLE,
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
devm_kzalloc(HANDLE,
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
devm_kzalloc(HANDLE,
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression HANDLE;
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
devm_kzalloc(HANDLE, sizeof(THING) * C2, ...)
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devm_kzalloc(HANDLE, sizeof(TYPE) * C2, ...)
|
devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
|
devm_kzalloc(HANDLE, C1 * C2, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- (E1) * E2
+ E1, E2
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- (E1) * (E2)
+ E1, E2
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-13 00:07:58 +03:00
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timings = devm_kcalloc(dev, arr_sz, sizeof(*timings),
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GFP_KERNEL);
|
2012-08-17 12:35:15 +04:00
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if (!timings)
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goto default_timings;
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for_each_child_of_node(np_ddr, np_tim) {
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if (of_device_is_compatible(np_tim, tim_compat)) {
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if (of_do_get_timings(np_tim, &timings[i])) {
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devm_kfree(dev, timings);
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goto default_timings;
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}
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i++;
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}
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}
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*nr_frequencies = arr_sz;
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return timings;
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default_timings:
|
2020-07-24 10:40:17 +03:00
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dev_warn(dev, "Using default memory timings\n");
|
2012-08-17 12:35:15 +04:00
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*nr_frequencies = ARRAY_SIZE(lpddr2_jedec_timings);
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return lpddr2_jedec_timings;
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}
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EXPORT_SYMBOL(of_get_ddr_timings);
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2019-08-21 13:42:58 +03:00
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/**
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* of_lpddr3_get_min_tck() - extract min timing values for lpddr3
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* @np: pointer to ddr device tree node
|
2020-07-24 21:23:25 +03:00
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* @dev: device requesting for min timing values
|
2019-08-21 13:42:58 +03:00
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|
*
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* Populates the lpddr3_min_tck structure by extracting data
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* from device tree node. Returns a pointer to the populated
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* structure. If any error in populating the structure, returns NULL.
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*/
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const struct lpddr3_min_tck *of_lpddr3_get_min_tck(struct device_node *np,
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struct device *dev)
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{
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int ret = 0;
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|
struct lpddr3_min_tck *min;
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min = devm_kzalloc(dev, sizeof(*min), GFP_KERNEL);
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if (!min)
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goto default_min_tck;
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ret |= of_property_read_u32(np, "tRFC-min-tck", &min->tRFC);
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ret |= of_property_read_u32(np, "tRRD-min-tck", &min->tRRD);
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ret |= of_property_read_u32(np, "tRPab-min-tck", &min->tRPab);
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ret |= of_property_read_u32(np, "tRPpb-min-tck", &min->tRPpb);
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ret |= of_property_read_u32(np, "tRCD-min-tck", &min->tRCD);
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ret |= of_property_read_u32(np, "tRC-min-tck", &min->tRC);
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ret |= of_property_read_u32(np, "tRAS-min-tck", &min->tRAS);
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ret |= of_property_read_u32(np, "tWTR-min-tck", &min->tWTR);
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ret |= of_property_read_u32(np, "tWR-min-tck", &min->tWR);
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ret |= of_property_read_u32(np, "tRTP-min-tck", &min->tRTP);
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ret |= of_property_read_u32(np, "tW2W-C2C-min-tck", &min->tW2W_C2C);
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ret |= of_property_read_u32(np, "tR2R-C2C-min-tck", &min->tR2R_C2C);
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ret |= of_property_read_u32(np, "tWL-min-tck", &min->tWL);
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ret |= of_property_read_u32(np, "tDQSCK-min-tck", &min->tDQSCK);
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ret |= of_property_read_u32(np, "tRL-min-tck", &min->tRL);
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ret |= of_property_read_u32(np, "tFAW-min-tck", &min->tFAW);
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ret |= of_property_read_u32(np, "tXSR-min-tck", &min->tXSR);
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ret |= of_property_read_u32(np, "tXP-min-tck", &min->tXP);
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ret |= of_property_read_u32(np, "tCKE-min-tck", &min->tCKE);
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ret |= of_property_read_u32(np, "tCKESR-min-tck", &min->tCKESR);
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ret |= of_property_read_u32(np, "tMRD-min-tck", &min->tMRD);
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if (ret) {
|
2020-07-24 10:40:17 +03:00
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dev_warn(dev, "Errors while parsing min-tck values\n");
|
2019-08-21 13:42:58 +03:00
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devm_kfree(dev, min);
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goto default_min_tck;
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}
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return min;
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default_min_tck:
|
2020-07-24 10:40:17 +03:00
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dev_warn(dev, "Using default min-tck values\n");
|
2019-08-21 13:42:58 +03:00
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return NULL;
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}
|
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|
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EXPORT_SYMBOL(of_lpddr3_get_min_tck);
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|
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static int of_lpddr3_do_get_timings(struct device_node *np,
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|
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struct lpddr3_timings *tim)
|
|
|
|
|
{
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int ret;
|
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/* The 'reg' param required since DT has changed, used as 'max-freq' */
|
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ret = of_property_read_u32(np, "reg", &tim->max_freq);
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|
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ret |= of_property_read_u32(np, "min-freq", &tim->min_freq);
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|
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|
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ret |= of_property_read_u32(np, "tRFC", &tim->tRFC);
|
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|
|
ret |= of_property_read_u32(np, "tRRD", &tim->tRRD);
|
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|
|
|
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:
|
2020-07-24 10:40:17 +03:00
|
|
|
dev_warn(dev, "Unsupported memory type\n");
|
2019-08-21 13:42:58 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
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:
|
2020-07-24 10:40:17 +03:00
|
|
|
dev_warn(dev, "Failed to get timings\n");
|
2019-08-21 13:42:58 +03:00
|
|
|
*nr_frequencies = 0;
|
|
|
|
|
return NULL;
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(of_lpddr3_get_ddr_timings);
|
