diff options
| author | Radoslaw Pietrzyk <radoslaw.pietrzyk@gmail.com> | 2018-05-16 17:27:11 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2018-05-26 18:19:17 -0400 |
| commit | 246a5e5fc20d4aa922bd980dd3272ebcb6b7a462 (patch) | |
| tree | 498a9ce725eb6cd49c7c0b5070dc20cd8999d3da /drivers/ram | |
| parent | b460b889e28379014a7f951c08d93a151116b1ad (diff) | |
ram: stm32_sdram: Adds stm32f429-disco fixes for HardFault at booting
- adds reading FMC swap setting from DTB to SDRAM driver
- sets FMC swap for stm32f429-disco board
- changes ram start address to 0x90000000
Signed-off-by: Radoslaw Pietrzyk <radoslaw.pietrzyk@gmail.com>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
Diffstat (limited to 'drivers/ram')
| -rw-r--r-- | drivers/ram/stm32_sdram.c | 37 |
1 files changed, 24 insertions, 13 deletions
diff --git a/drivers/ram/stm32_sdram.c b/drivers/ram/stm32_sdram.c index dc39f33d16..f6cac8eb90 100644 --- a/drivers/ram/stm32_sdram.c +++ b/drivers/ram/stm32_sdram.c @@ -11,6 +11,8 @@ #include <asm/io.h> #define MEM_MODE_MASK GENMASK(2, 0) +#define SWP_FMC_OFFSET 10 +#define SWP_FMC_MASK GENMASK(SWP_FMC_OFFSET+1, SWP_FMC_OFFSET) #define NOT_FOUND 0xff struct stm32_fmc_regs { @@ -256,27 +258,36 @@ static int stm32_fmc_ofdata_to_platdata(struct udevice *dev) struct ofnode_phandle_args args; u32 *syscfg_base; u32 mem_remap; + u32 swp_fmc; ofnode bank_node; char *bank_name; u8 bank = 0; int ret; - mem_remap = dev_read_u32_default(dev, "st,mem_remap", NOT_FOUND); - if (mem_remap != NOT_FOUND) { - ret = dev_read_phandle_with_args(dev, "st,syscfg", NULL, 0, 0, + ret = dev_read_phandle_with_args(dev, "st,syscfg", NULL, 0, 0, &args); - if (ret) { - debug("%s: can't find syscon device (%d)\n", __func__, - ret); - return ret; - } - + if (ret) { + dev_dbg(dev, "%s: can't find syscon device (%d)\n", __func__, ret); + } else { syscfg_base = (u32 *)ofnode_get_addr(args.node); - /* set memory mapping selection */ - clrsetbits_le32(syscfg_base, MEM_MODE_MASK, mem_remap); - } else { - debug("%s: cannot find st,mem_remap property\n", __func__); + mem_remap = dev_read_u32_default(dev, "st,mem_remap", NOT_FOUND); + if (mem_remap != NOT_FOUND) { + /* set memory mapping selection */ + clrsetbits_le32(syscfg_base, MEM_MODE_MASK, mem_remap); + } else { + dev_dbg(dev, "%s: cannot find st,mem_remap property\n", __func__); + } + + swp_fmc = dev_read_u32_default(dev, "st,swp_fmc", NOT_FOUND); + if (swp_fmc != NOT_FOUND) { + /* set fmc swapping selection */ + clrsetbits_le32(syscfg_base, SWP_FMC_MASK, swp_fmc << SWP_FMC_OFFSET); + } else { + dev_dbg(dev, "%s: cannot find st,swp_fmc property\n", __func__); + } + + dev_dbg(dev, "syscfg %x = %x\n", (u32)syscfg_base, *syscfg_base); } dev_for_each_subnode(bank_node, dev) { |