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pico-imx7d: Add support for the 2GB variant

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Add the board detection mechanism to be able to support
the 2GB variant.

Based on the code from TechNexion U-Boot downstream tree.

Signed-off-by: Fabio Estevam <festevam@denx.de>
This commit is contained in:
Fabio Estevam 2023-01-11 09:22:58 -03:00 committed by Stefano Babic
parent d12618b927
commit 068027b1a0
1 changed files with 27 additions and 3 deletions
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30
board/technexion/pico-imx7d/spl.c
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@ -61,6 +61,8 @@ static struct ddrc ddrc_regs_val = {
.dramtmg0 = 0x09081109,
.addrmap0 = 0x0000001f,
.addrmap1 = 0x00080808,
.addrmap2 = 0x00000000,
.addrmap3 = 0x00000000,
.addrmap4 = 0x00000f0f,
.addrmap5 = 0x07070707,
.addrmap6 = 0x0f0f0707,
@ -100,16 +102,38 @@ static void gpr_init(void)
writel(0x4F400005, &gpr_regs->gpr[1]);
}
static bool is_1g(void)
/*
* Revision Detection
*
* GPIO1_12 GPIO1_13
* 0 0 1GB DDR3
* 0 1 2GB DDR3
* 1 0 512MB DDR3
*/
static int imx7d_pico_detect_board(void)
{
gpio_direction_input(IMX_GPIO_NR(1, 12));
return !gpio_get_value(IMX_GPIO_NR(1, 12));
gpio_direction_input(IMX_GPIO_NR(1, 13));
return gpio_get_value(IMX_GPIO_NR(1, 12)) << 1 |
gpio_get_value(IMX_GPIO_NR(1, 13));
}
static void ddr_init(void)
{
if (is_1g())
switch (imx7d_pico_detect_board()) {
case 0:
ddrc_regs_val.addrmap6 = 0x0f070707;
break;
case 1:
ddrc_regs_val.addrmap0 = 0x0000001f;
ddrc_regs_val.addrmap1 = 0x00181818;
ddrc_regs_val.addrmap4 = 0x00000f0f;
ddrc_regs_val.addrmap5 = 0x04040404;
ddrc_regs_val.addrmap6 = 0x04040404;
break;
}
mx7_dram_cfg(&ddrc_regs_val, &ddrc_mp_val, &ddr_phy_regs_val,
&calib_param);