diff options
Diffstat (limited to 'lib/utils/fdt')
| -rw-r--r-- | lib/utils/fdt/fdt_helper.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/lib/utils/fdt/fdt_helper.c b/lib/utils/fdt/fdt_helper.c index 887d6ed6..78077f79 100644 --- a/lib/utils/fdt/fdt_helper.c +++ b/lib/utils/fdt/fdt_helper.c @@ -26,6 +26,9 @@ #define DEFAULT_SIFIVE_UART_REG_SHIFT 0 #define DEFAULT_SIFIVE_UART_REG_IO_WIDTH 4 +#define DEFAULT_SHAKTI_UART_FREQ 50000000 +#define DEFAULT_SHAKTI_UART_BAUD 115200 + const struct fdt_match *fdt_match_node(void *fdt, int nodeoff, const struct fdt_match *match_table) { @@ -164,6 +167,40 @@ int fdt_parse_max_hart_id(void *fdt, u32 *max_hartid) return 0; } +int fdt_parse_shakti_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_SHAKTI_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_SHAKTI_UART_BAUD; + + return 0; +} + int fdt_parse_sifive_uart_node(void *fdt, int nodeoffset, struct platform_uart_data *uart) { |