int fdt_get_node_addr_size(void *fdt, int node, unsigned long *addr,
unsigned long *size);
+int fdt_parse_sifive_uart_node(void *fdt, int nodeoffset,
+ struct platform_uart_data *uart);
+
int fdt_parse_uart8250_node(void *fdt, int nodeoffset,
struct platform_uart_data *uart);
#define DEFAULT_UART_REG_SHIFT 0
#define DEFAULT_UART_REG_IO_WIDTH 1
+#define DEFAULT_SIFIVE_UART_FREQ 0
+#define DEFAULT_SIFIVE_UART_BAUD 115200
+#define DEFAULT_SIFIVE_UART_REG_SHIFT 0
+#define DEFAULT_SIFIVE_UART_REG_IO_WIDTH 4
+
const struct fdt_match *fdt_match_node(void *fdt, int nodeoff,
const struct fdt_match *match_table)
{
return 0;
}
+int fdt_parse_sifive_uart_node(void *fdt, int nodeoffset,
+ struct platform_uart_data *uart)
+{
+ int len, rc;
+ const fdt32_t *val;
+ unsigned long reg_addr, reg_size;
+
+ if (nodeoffset < 0 || !uart || !fdt)
+ return SBI_ENODEV;
+
+ rc = fdt_get_node_addr_size(fdt, nodeoffset, ®_addr, ®_size);
+ if (rc < 0 || !reg_addr || !reg_size)
+ return SBI_ENODEV;
+ uart->addr = reg_addr;
+
+ /**
+ * UART address is mandaotry. clock-frequency and current-speed
+ * may not be present. Don't return error.
+ */
+ val = (fdt32_t *)fdt_getprop(fdt, nodeoffset, "clock-frequency", &len);
+ if (len > 0 && val)
+ uart->freq = fdt32_to_cpu(*val);
+ else
+ uart->freq = DEFAULT_SIFIVE_UART_FREQ;
+
+ val = (fdt32_t *)fdt_getprop(fdt, nodeoffset, "current-speed", &len);
+ if (len > 0 && val)
+ uart->baud = fdt32_to_cpu(*val);
+ else
+ uart->baud = DEFAULT_SIFIVE_UART_BAUD;
+
+ /* For SiFive UART, the reg-shift and reg-io-width are fixed .*/
+ uart->reg_shift = DEFAULT_SIFIVE_UART_REG_SHIFT;
+ uart->reg_io_width = DEFAULT_SIFIVE_UART_REG_IO_WIDTH;
+
+ return 0;
+}
+
int fdt_parse_uart8250_node(void *fdt, int nodeoffset,
struct platform_uart_data *uart)
{