[PATCH v2 3/6] lib: utils: Add FDT parsing API common for both ACLINT and CLINT

[Anup Patel]

We add fdt_parse_aclint_node() which can parse both ACLINT and
CLINT DT nodes. This means fdt_parse_clint_node() is not required
anymore so we remove it as well.

Signed-off-by: Anup Patel <anup.patel at wdc.com>
Reviewed-by: Bin Meng <bmeng.cn at gmail.com>
Reviewed-by: Xiang W <wxjstz at 126.com>
---
 include/sbi_utils/fdt/fdt_helper.h |  7 +++----
 lib/utils/fdt/fdt_helper.c         | 31 +++++++++++++++---------------
 lib/utils/ipi/fdt_ipi_clint.c      |  5 ++++-
 lib/utils/timer/fdt_timer_clint.c  |  9 ++++++++-
 4 files changed, 30 insertions(+), 22 deletions(-)

diff --git a/include/sbi_utils/fdt/fdt_helper.h b/include/sbi_utils/fdt/fdt_helper.h
index c89f2e6..871f9b9 100644
--- a/include/sbi_utils/fdt/fdt_helper.h
+++ b/include/sbi_utils/fdt/fdt_helper.h
@@ -60,10 +60,9 @@ int fdt_parse_plic_node(void *fdt, int nodeoffset, struct plic_data *plic);
 
 int fdt_parse_plic(void *fdt, struct plic_data *plic, const char *compat);
 
-struct clint_data;
-
-int fdt_parse_clint_node(void *fdt, int nodeoffset, bool for_timer,
-			 struct clint_data *clint);
+int fdt_parse_aclint_node(void *fdt, int nodeoffset, bool for_timer,
+			  unsigned long *out_addr, unsigned long *out_size,
+			  u32 *out_first_hartid, u32 *out_hart_count);
 
 int fdt_parse_compat_addr(void *fdt, unsigned long *addr,
 			  const char *compatible);
diff --git a/lib/utils/fdt/fdt_helper.c b/lib/utils/fdt/fdt_helper.c
index 9143e44..de77196 100644
--- a/lib/utils/fdt/fdt_helper.c
+++ b/lib/utils/fdt/fdt_helper.c
@@ -14,7 +14,6 @@
 #include <sbi/sbi_scratch.h>
 #include <sbi_utils/fdt/fdt_helper.h>
 #include <sbi_utils/irqchip/plic.h>
-#include <sbi_utils/sys/clint.h>
 
 #define DEFAULT_UART_FREQ		0
 #define DEFAULT_UART_BAUD		115200
@@ -421,8 +420,9 @@ int fdt_parse_plic(void *fdt, struct plic_data *plic, const char *compat)
 	return fdt_parse_plic_node(fdt, nodeoffset, plic);
 }
 
-int fdt_parse_clint_node(void *fdt, int nodeoffset, bool for_timer,
-			 struct clint_data *clint)
+int fdt_parse_aclint_node(void *fdt, int nodeoffset, bool for_timer,
+			  unsigned long *out_addr, unsigned long *out_size,
+			  u32 *out_first_hartid, u32 *out_hart_count)
 {
 	const fdt32_t *val;
 	unsigned long reg_addr, reg_size;
@@ -430,22 +430,25 @@ int fdt_parse_clint_node(void *fdt, int nodeoffset, bool for_timer,
 	u32 phandle, hwirq, hartid, first_hartid, last_hartid;
 	u32 match_hwirq = (for_timer) ? IRQ_M_TIMER : IRQ_M_SOFT;
 
-	if (nodeoffset < 0 || !clint || !fdt)
-		return SBI_ENODEV;
+	if (nodeoffset < 0 || !fdt ||
+	    !out_addr || !out_size ||
+	    !out_first_hartid || !out_hart_count)
+		return SBI_EINVAL;
 
 	rc = fdt_get_node_addr_size(fdt, nodeoffset, &reg_addr, &reg_size);
 	if (rc < 0 || !reg_addr || !reg_size)
 		return SBI_ENODEV;
-	clint->addr = reg_addr;
+	*out_addr = reg_addr;
+	*out_size = reg_size;
 
 	val = fdt_getprop(fdt, nodeoffset, "interrupts-extended", &count);
 	if (!val || count < sizeof(fdt32_t))
-		return SBI_EINVAL;
+		return SBI_ENODEV;
 	count = count / sizeof(fdt32_t);
 
 	first_hartid = -1U;
 	last_hartid = 0;
-	clint->hart_count = 0;
+	*out_hart_count = 0;
 	for (i = 0; i < count; i += 2) {
 		phandle = fdt32_to_cpu(val[i]);
 		hwirq = fdt32_to_cpu(val[i + 1]);
@@ -470,21 +473,17 @@ int fdt_parse_clint_node(void *fdt, int nodeoffset, bool for_timer,
 				first_hartid = hartid;
 			if (hartid > last_hartid)
 				last_hartid = hartid;
-			clint->hart_count++;
+			(*out_hart_count)++;
 		}
 	}
 
 	if ((last_hartid < first_hartid) || first_hartid == -1U)
 		return SBI_ENODEV;
 
-	clint->first_hartid = first_hartid;
+	*out_first_hartid = first_hartid;
 	count = last_hartid - first_hartid + 1;
-	if (clint->hart_count < count)
-		clint->hart_count = count;
-
-	clint->has_64bit_mmio = TRUE;
-	if (fdt_getprop(fdt, nodeoffset, "clint,has-no-64bit-mmio", &count))
-		clint->has_64bit_mmio = FALSE;
+	if (*out_hart_count < count)
+		*out_hart_count = count;
 
 	return 0;
 }
diff --git a/lib/utils/ipi/fdt_ipi_clint.c b/lib/utils/ipi/fdt_ipi_clint.c
index 529f978..ce0ca8e 100644
--- a/lib/utils/ipi/fdt_ipi_clint.c
+++ b/lib/utils/ipi/fdt_ipi_clint.c
@@ -21,15 +21,18 @@ static int ipi_clint_cold_init(void *fdt, int nodeoff,
 			       const struct fdt_match *match)
 {
 	int rc;
+	unsigned long cisize;
 	struct clint_data *ci;
 
 	if (CLINT_IPI_MAX_NR <= clint_ipi_count)
 		return SBI_ENOSPC;
 	ci = &clint_ipi[clint_ipi_count++];
 
-	rc = fdt_parse_clint_node(fdt, nodeoff, FALSE, ci);
+	rc = fdt_parse_aclint_node(fdt, nodeoff, false, &ci->addr, &cisize,
+				   &ci->first_hartid, &ci->hart_count);
 	if (rc)
 		return rc;
+	ci->has_64bit_mmio = false;
 
 	return clint_cold_ipi_init(ci);
 }
diff --git a/lib/utils/timer/fdt_timer_clint.c b/lib/utils/timer/fdt_timer_clint.c
index 0352e53..63d6586 100644
--- a/lib/utils/timer/fdt_timer_clint.c
+++ b/lib/utils/timer/fdt_timer_clint.c
@@ -7,6 +7,7 @@
  *   Anup Patel <anup.patel at wdc.com>
  */
 
+#include <libfdt.h>
 #include <sbi/sbi_error.h>
 #include <sbi_utils/fdt/fdt_helper.h>
 #include <sbi_utils/timer/fdt_timer.h>
@@ -21,6 +22,7 @@ static int timer_clint_cold_init(void *fdt, int nodeoff,
 				  const struct fdt_match *match)
 {
 	int rc;
+	unsigned long ctsize;
 	struct clint_data *ct, *ctmaster = NULL;
 
 	if (CLINT_TIMER_MAX_NR <= clint_timer_count)
@@ -29,10 +31,15 @@ static int timer_clint_cold_init(void *fdt, int nodeoff,
 	if (1 < clint_timer_count)
 		ctmaster = &clint_timer[0];
 
-	rc = fdt_parse_clint_node(fdt, nodeoff, TRUE, ct);
+	rc = fdt_parse_aclint_node(fdt, nodeoff, true, &ct->addr, &ctsize,
+				   &ct->first_hartid, &ct->hart_count);
 	if (rc)
 		return rc;
 
+	ct->has_64bit_mmio = true;
+	if (fdt_getprop(fdt, nodeoff, "clint,has-no-64bit-mmio", &rc))
+		ct->has_64bit_mmio = false;
+
 	return clint_cold_timer_init(ct, ctmaster);
 }
 
-- 
2.25.1