#include <console/console.h>
#include <device/device.h>
#include <device/dram/lpddr4.h>
#include <memory_info.h>
#include <smbios.h>
#include <types.h>

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Data Structures
struct	lpddr4_speed_attr

Enumerations
enum	lpddr4_speed_grade { LPDDR4_1333 , LPDDR4_1600 , LPDDR4_1866 , LPDDR4_2133 , LPDDR4_2400 , LPDDR4_2666 , LPDDR4_3200 , LPDDR4_3733 , LPDDR4_4266 }

Functions
uint16_t	lpddr4_speed_mhz_to_reported_mts (uint16_t speed_mhz)
	Converts LPDDR4 clock speed in MHz to the standard reported speed in MT/s. More...

Variables
static const struct lpddr4_speed_attr	lpddr4_speeds []
	LPDDR4 speed attributes derived from JEDEC 209-4C and industry norms. More...

Enumeration Type Documentation

◆ lpddr4_speed_grade

enum lpddr4_speed_grade

Enumerator
LPDDR4_1333
LPDDR4_1600
LPDDR4_1866
LPDDR4_2133
LPDDR4_2400
LPDDR4_2666
LPDDR4_3200
LPDDR4_3733
LPDDR4_4266

Definition at line 10 of file lpddr4.c.

Function Documentation

◆ lpddr4_speed_mhz_to_reported_mts()

uint16_t lpddr4_speed_mhz_to_reported_mts ( uint16_t speed_mhz )

Converts LPDDR4 clock speed in MHz to the standard reported speed in MT/s.

Definition at line 87 of file lpddr4.c.

References ARRAY_SIZE, BIOS_ERR, lpddr4_speeds, lpddr4_speed_attr::max_clock_mhz, lpddr4_speed_attr::min_clock_mhz, printk, and lpddr4_speed_attr::reported_mts.

Referenced by ddr_speed_mhz_to_reported_mts().

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Variable Documentation

◆ lpddr4_speeds

const struct lpddr4_speed_attr lpddr4_speeds[]

static

LPDDR4 speed attributes derived from JEDEC 209-4C and industry norms.

min_clock_mhz = Previous max_clock_mhz + 1 max_clock_mhz = 1000/min_tCk_avg(ns) reported_mts = Standard reported DDR4 speed in MT/s May be slightly less than the actual max MT/s

Definition at line 1 of file lpddr4.c.

Referenced by lpddr4_speed_mhz_to_reported_mts().

Data Structures

Enumerations