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| author |   Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-04-15 18:39:27 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-07-15 09:20:24 -0300 |
| commit | 2bbbf827d339032dbeda62f0a5f20d2fde07b0f5 (patch) | |
| tree | 1a5bf188498e10c4f842e6108fd120f385ac1d06 | |
| parent | docs: arm: convert docs to ReST and rename to *.rst (diff) | |
| download | linux-dev-2bbbf827d339032dbeda62f0a5f20d2fde07b0f5.tar.xz linux-dev-2bbbf827d339032dbeda62f0a5f20d2fde07b0f5.zip | |
docs: memory-devices: convert ti-emif.txt to ReST
Prepare this file to be moved to a kernel book by converting
it to ReST format and renaming it to ti-emif.rst.
While this is not part of any book, mark it as :orphan:, in order
to avoid build warnings.
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
| -rw-r--r-- | Documentation/memory-devices/ti-emif.rst (renamed from Documentation/memory-devices/ti-emif.txt) | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/Documentation/memory-devices/ti-emif.txt b/Documentation/memory-devices/ti-emif.rst index f4ad9a7d0f4b..c9242294e63c 100644 --- a/Documentation/memory-devices/ti-emif.txt +++ b/Documentation/memory-devices/ti-emif.rst @@ -1,20 +1,24 @@ -TI EMIF SDRAM Controller Driver: +:orphan: + +=============================== +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 @@ -29,10 +33,11 @@ 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): -===================================================================== +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 @@ -40,17 +45,19 @@ information can be passed through platform data (struct emif_platform_data) - IP revision - PHY type -Interface to the external world: -================================ +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 |