On 1/30/2024 1:11 PM, Neha Malcom Francis wrote:
The number of DDR controllers to be initialised and used should depend on the device tree with the constraint of the maximum number of controllers the device supports. Since J721S2 has multiple (2) controllers, instead of hardcoding the number of probes, move to depending on the device tree UCLASS_RAM nodes present.
Signed-off-by: Neha Malcom Francis n-francis@ti.com
Boot logs: https://gist.github.com/nehamalcom/07fedf4aa173590214b5cef6e1688fa1
This was also parallely proposed in [1] on the mailing-list for J784S4.
[1] https://lore.kernel.org/all/3a7c817b-de29-463a-b4b6-d62c0df66ade@ti.com/
arch/arm/mach-k3/j721s2_init.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/arch/arm/mach-k3/j721s2_init.c b/arch/arm/mach-k3/j721s2_init.c index fb0708bae1..ff21619506 100644 --- a/arch/arm/mach-k3/j721s2_init.c +++ b/arch/arm/mach-k3/j721s2_init.c @@ -213,10 +213,12 @@ bool check_rom_loaded_sysfw(void) return is_rom_loaded_sysfw(&bootdata); }
+#define J721S2_MAX_CONTROLLERS 2
- void k3_mem_init(void) { struct udevice *dev;
- int ret;
int ret, ctr = 1;
if (IS_ENABLED(CONFIG_K3_J721E_DDRSS)) { ret = uclass_get_device_by_name(UCLASS_MISC, "msmc", &dev);
@@ -227,9 +229,14 @@ void k3_mem_init(void) if (ret) panic("DRAM 0 init failed: %d\n", ret);
ret = uclass_next_device_err(&dev);if (ret)panic("DRAM 1 init failed: %d\n", ret);
Since there are two controllers only and you need to call uclass_get_device and uclass_next_device_err
what about just checking error in above removed code, something like
ret = uclass_next_device_err(&dev); if (ret!=ENODEV) panic("DRAM 1 init failed: %d\n", ret);
while (ctr < J721S2_MAX_CONTROLLERS) {ret = uclass_next_device_err(&dev);if (ret == -ENODEV)break;if (ret)panic("DRAM %d init failed: %d\n", ctr, ret);ctr++;}