From: "Manuel Hernández | OPENCHIP" <manuel.hernandez@openchip.com>
To: "opensbi@lists.infradead.org" <opensbi@lists.infradead.org>
Cc: "Manuel Hernández | OPENCHIP" <manuel.hernandez@openchip.com>
Subject: [PATCH] platform: ariane: parse dtb for getting some initial parameters
Date: Fri, 7 Nov 2025 07:54:17 +0000 [thread overview]
Message-ID: <20251107075412.1350-1-manuel.hernandez@openchip.com> (raw)
From: Manuel Hernández Méndez <manuel.hernandez@openchip.com>
Add code for getting some uart, clint and plic parameters from
device tree.
Signed-off-by: Manuel Hernández Méndez <manuel.hernandez@openchip.com>
---
platform/generic/openhwgroup/ariane.c | 39 ++++++++++++++++-----------
1 file changed, 24 insertions(+), 15 deletions(-)
diff --git a/platform/generic/openhwgroup/ariane.c b/platform/generic/openhwgroup/ariane.c
index 6931e3f0..70a97f38 100644
--- a/platform/generic/openhwgroup/ariane.c
+++ b/platform/generic/openhwgroup/ariane.c
@@ -9,16 +9,8 @@
#include <sbi_utils/fdt/fdt_fixup.h>
#include <sbi_utils/ipi/aclint_mswi.h>
#include <sbi_utils/irqchip/plic.h>
-#include <sbi_utils/serial/uart8250.h>
#include <sbi_utils/timer/aclint_mtimer.h>
-#define ARIANE_UART_ADDR 0x10000000
-#define ARIANE_UART_FREQ 50000000
-#define ARIANE_UART_BAUDRATE 115200
-#define ARIANE_UART_REG_SHIFT 2
-#define ARIANE_UART_REG_WIDTH 4
-#define ARIANE_UART_REG_OFFSET 0
-#define ARIANE_UART_CAPS 0
#define ARIANE_PLIC_ADDR 0xc000000
#define ARIANE_PLIC_SIZE (0x200000 + \
(ARIANE_HART_COUNT * 0x1000))
@@ -66,21 +58,38 @@ static struct aclint_mtimer_data mtimer = {
*/
static int ariane_early_init(bool cold_boot)
{
+ const void *fdt;
+ struct plic_data plic_data = plic;
+ unsigned long aclint_freq;
+ uint64_t clint_addr;
int rc;
if (!cold_boot)
return 0;
- rc = uart8250_init(ARIANE_UART_ADDR,
- ARIANE_UART_FREQ,
- ARIANE_UART_BAUDRATE,
- ARIANE_UART_REG_SHIFT,
- ARIANE_UART_REG_WIDTH,
- ARIANE_UART_REG_OFFSET,
- ARIANE_UART_CAPS);
+ rc = generic_early_init(cold_boot);
if (rc)
return rc;
+ fdt = fdt_get_address();
+
+ rc = fdt_parse_timebase_frequency(fdt, &aclint_freq);
+ if (!rc)
+ mtimer.mtime_freq = aclint_freq;
+
+ rc = fdt_parse_compat_addr(fdt, &clint_addr, "riscv,clint0");
+ if (!rc) {
+ mswi.addr = clint_addr;
+ mtimer.mtime_addr = clint_addr + CLINT_MTIMER_OFFSET +
+ ACLINT_DEFAULT_MTIME_OFFSET;
+ mtimer.mtimecmp_addr = clint_addr + CLINT_MTIMER_OFFSET +
+ ACLINT_DEFAULT_MTIMECMP_OFFSET;
+ }
+
+ rc = fdt_parse_plic(fdt, &plic_data, "riscv,plic0");
+ if (!rc)
+ plic = plic_data;
+
return aclint_mswi_cold_init(&mswi);
}
--
2.34.1
--
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next reply other threads:[~2025-11-07 7:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-07 7:54 Manuel Hernández | OPENCHIP [this message]
2025-12-01 5:08 ` [PATCH] platform: ariane: parse dtb for getting some initial parameters Anup Patel
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