Commit graph

13 commits

Author SHA1 Message Date
Patrice Chotard
7016651eac ram: stm32: add stm32h7 support
STM32F7 and H7 shared the same SDRAM control block.
On STM32H7 few control bits has been added.
The current driver need some minor adaptation as FMC block
enable/disable for H7.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
2017-07-26 11:29:15 -04:00
Patrice Chotard
f303aaf21b ram: stm32: add second SDRAM bank management
FMC is able to manage 2 SDRAM banks, but the current driver
implementation is only able to manage the first SDRAM bank.

Even if only bank2 is used, some bank1 registers must be
configured.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2017-07-26 11:29:15 -04:00
Patrice Chotard
f39b90dc8c ram: stm32: replace fdtdec_get by ofnode calls
Replace all fdtdec_get..() calls by ofnode_read...() or dev_read..().
This will allow drivers to support a live device tree.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2017-07-26 11:29:14 -04:00
Patrice Chotard
1421e0a375 ram: stm32: get base address from DT
Retrieve RAM base address from DT instead of using STM32_SDRAM_FMC

For STM32F7, FMC block base address is 0xA0000000, but SDRAM
registers are located at offset 0x140 inside FMC block.
Update the stm32_fmc_regs fields with all FMC registers
to map SDRAM registers at the right address.

These additionals registers will be used later.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
2017-07-26 11:29:14 -04:00
Patrice Chotard
9242ece12b ram: stm32: migrate fmc defines in driver file
Migrate all FMC defines from arch/arm/include/asm/arch-stm32f7/fmc.h
to drivers/ram/stm32_sdram.c

This will avoid to add an additionnal arch-stm32xx/fmc.h file when
a new stm32 family soc will be introduced.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Vikas Manocha <vikas.manocha@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2017-07-26 11:29:07 -04:00
Patrice Chotard
14a50e3736 drivers: ram: stm32: fix compilation issue
If CONFIG_CLK flag is not set, compilation raises the
following error message:

drivers/ram/stm32_sdram.c: In function 'stm32_fmc_probe':
drivers/ram/stm32_sdram.c:154:2: error: 'ret' undeclared (first use in this function)
  ret = stm32_sdram_init(dev);

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
cc: Vikas Manocha <vikas.manocha@st.com>
2017-06-05 14:13:13 -04:00
Simon Glass
da409ccc4a dm: core: Replace of_offset with accessor (part 2)
At present devices use a simple integer offset to record the device tree
node associated with the device. In preparation for supporting a live
device tree, which uses a node pointer instead, refactor existing code to
access this field through an inline function.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-06-01 07:03:04 -06:00
Vikas Manocha
bfea69ad27 stm32f7: sdram: correct sdram configuration as per micron sdram
Actually the sdram memory on stm32f746 discovery board is micron part
MT48LC_4M32_B2B5_6A. This patch does the modification required in the
device tree node & driver for the same.

Also we are passing here all the timing parameters in terms of clock
cycles, so no need to convert time(ns or ms) to cycles.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
cc: Christophe KERELLO <christophe.kerello@st.com>
2017-05-08 11:57:22 -04:00
Vikas Manocha
57af3cc32a stm32f7: stm32f746-disco: read memory info from device tree
Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
cc: Christophe KERELLO <christophe.kerello@st.com>
2017-05-08 11:57:21 -04:00
Vikas Manocha
6c9a10034a stm32f7: sdram: use sdram device tree node to configure sdram controller
Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
cc: Christophe KERELLO <christophe.kerello@st.com>
2017-05-08 11:39:05 -04:00
Vikas Manocha
d0b24c1aa9 stm32f7: use clock driver to enable sdram controller clock
This patch also removes the sdram/fmc clock enable from board specific
code.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
cc: Christophe KERELLO <christophe.kerello@st.com>
2017-05-08 11:39:04 -04:00
Vikas Manocha
910a52ede3 stm32f7: dm: add driver model support for sdram
Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
cc: Christophe KERELLO <christophe.kerello@st.com>
2017-05-08 11:39:02 -04:00
Vikas Manocha
bf1ae4426b stm32f7: sdram: move sdram driver code to ram drivers area
Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
cc: Christophe KERELLO <christophe.kerello@st.com>
2017-05-08 11:39:02 -04:00