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| author | Marek Vasut <marex@denx.de> | 2020-04-22 14:18:14 +0300 |
|---|---|---|
| committer | Patrick Delaunay <patrick.delaunay@st.com> | 2020-05-14 10:02:12 +0300 |
| commit | 2d68365da17b7dc45543daaa9c5010c11332ba09 (patch) | |
| tree | 62db4764741b0e16415bf1bc12acbdea7f8aba24 /board/dhelectronics | |
| parent | a8c97f4a00fb5a9a31970351fce4355d37d19c7d (diff) | |
| download | u-boot-2d68365da17b7dc45543daaa9c5010c11332ba09.tar.xz | |
ARM: stm32: Implement DDR3 coding on DHCOR SoM
The DHCOR board does exist in multiple variants with different DDR3
DRAM sizes. To cater for all of them, implement DDR3 code handling.
There are two GPIOs which code the DRAM size populated on the SoM,
read them out and use the value to pick the correct DDR3 config.
Reviewed-by: Patrick Delaunay <patrick.delaunay@st.com>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Diffstat (limited to 'board/dhelectronics')
| -rw-r--r-- | board/dhelectronics/dh_stm32mp1/board.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/board/dhelectronics/dh_stm32mp1/board.c b/board/dhelectronics/dh_stm32mp1/board.c index 5193868d7c..9a2926bbe5 100644 --- a/board/dhelectronics/dh_stm32mp1/board.c +++ b/board/dhelectronics/dh_stm32mp1/board.c @@ -135,6 +135,7 @@ int checkboard(void) #ifdef CONFIG_BOARD_EARLY_INIT_F static u8 brdcode __section("data"); +static u8 ddr3code __section("data"); static u8 somcode __section("data"); static void board_get_coding_straps(void) @@ -150,6 +151,7 @@ static void board_get_coding_straps(void) } brdcode = 0; + ddr3code = 0; somcode = 0; ret = gpio_request_list_by_name_nodev(node, "dh,som-coding-gpios", @@ -158,13 +160,34 @@ static void board_get_coding_straps(void) for (i = 0; i < ret; i++) somcode |= !!dm_gpio_get_value(&(gpio[i])) << i; + ret = gpio_request_list_by_name_nodev(node, "dh,ddr3-coding-gpios", + gpio, ARRAY_SIZE(gpio), + GPIOD_IS_IN); + for (i = 0; i < ret; i++) + ddr3code |= !!dm_gpio_get_value(&(gpio[i])) << i; + ret = gpio_request_list_by_name_nodev(node, "dh,board-coding-gpios", gpio, ARRAY_SIZE(gpio), GPIOD_IS_IN); for (i = 0; i < ret; i++) brdcode |= !!dm_gpio_get_value(&(gpio[i])) << i; - printf("Code: SoM:rev=%d Board:rev=%d\n", somcode, brdcode); + printf("Code: SoM:rev=%d,ddr3=%d Board:rev=%d\n", + somcode, ddr3code, brdcode); +} + +int board_stm32mp1_ddr_config_name_match(struct udevice *dev, + const char *name) +{ + if (ddr3code == 2 && + !strcmp(name, "st,ddr3-1066-888-bin-g-1x4gb-533mhz")) + return 0; + + if (ddr3code == 3 && + !strcmp(name, "st,ddr3-1066-888-bin-g-2x4gb-533mhz")) + return 0; + + return -EINVAL; } int board_early_init_f(void) @@ -537,6 +560,7 @@ int board_late_init(void) #ifdef CONFIG_BOARD_EARLY_INIT_F env_set_ulong("dh_som_rev", somcode); env_set_ulong("dh_board_rev", brdcode); + env_set_ulong("dh_ddr3_code", ddr3code); #endif return 0; |