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Diffstat (limited to 'Documentation/memory-devices/ti-emif.txt')
| -rw-r--r-- | Documentation/memory-devices/ti-emif.txt | 57 |
1 files changed, 0 insertions, 57 deletions
diff --git a/Documentation/memory-devices/ti-emif.txt b/Documentation/memory-devices/ti-emif.txt deleted file mode 100644 index f4ad9a7d0f4b..000000000000 --- a/Documentation/memory-devices/ti-emif.txt +++ /dev/null @@ -1,57 +0,0 @@ -TI EMIF SDRAM Controller Driver: - -Author -======== -Aneesh V <aneesh@ti.com> - -Location -============ -driver/memory/emif.c - -Supported SoCs: -=================== -TI OMAP44xx -TI OMAP54xx - -Menuconfig option: -========================== -Device Drivers - Memory devices - Texas Instruments EMIF driver - -Description -=========== -This driver is for the EMIF module available in Texas Instruments -SoCs. EMIF is an SDRAM controller that, based on its revision, -supports one or more of DDR2, DDR3, and LPDDR2 SDRAM protocols. -This driver takes care of only LPDDR2 memories presently. The -functions of the driver includes re-configuring AC timing -parameters and other settings during frequency, voltage and -temperature changes - -Platform Data (see include/linux/platform_data/emif_plat.h): -===================================================================== -DDR device details and other board dependent and SoC dependent -information can be passed through platform data (struct emif_platform_data) -- DDR device details: 'struct ddr_device_info' -- Device AC timings: 'struct lpddr2_timings' and 'struct lpddr2_min_tck' -- Custom configurations: customizable policy options through - 'struct emif_custom_configs' -- IP revision -- PHY type - -Interface to the external world: -================================ -EMIF driver registers notifiers for voltage and frequency changes -affecting EMIF and takes appropriate actions when these are invoked. -- freq_pre_notify_handling() -- freq_post_notify_handling() -- volt_notify_handling() - -Debugfs -======== -The driver creates two debugfs entries per device. -- regcache_dump : dump of register values calculated and saved for all - frequencies used so far. -- mr4 : last polled value of MR4 register in the LPDDR2 device. MR4 - indicates the current temperature level of the device. |