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Fix baud rate divisor computation for U540.

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Signed-off-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Atish Patra
2018-12-17 15:31:49 -08:00
parent 3250fe7299
commit e0a660ec5b
2 changed files with 46 additions and 5 deletions
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25
plat/sifive/hifive_u540/platform.c
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@@ -10,12 +10,12 @@
#include <sbi/riscv_encoding.h>
#include <sbi/sbi_const.h>
#include <sbi/sbi_platform.h>
#include <sbi/riscv_io.h>
#include <plat/irqchip/plic.h>
#include <plat/serial/sifive-uart.h>
#include <plat/sys/clint.h>
#define SIFIVE_U_SYS_CLK 1000000000
#define SIFIVE_U_PERIPH_CLK (SIFIVE_U_SYS_CLK / 2)
#define SIFIVE_U_CLINT_ADDR 0x2000000
@@ -23,8 +23,15 @@
#define SIFIVE_U_PLIC_NUM_SOURCES 0x35
#define SIFIVE_U_PLIC_NUM_PRIORITIES 7
#define SIFIVE_U_UART0_ADDR 0x10013000
#define SIFIVE_U_UART1_ADDR 0x10023000
#define SIFIVE_U_UART0_ADDR 0x10010000
#define SIFIVE_U_UART1_ADDR 0x10011000
#define SIFIVE_UART_BAUDRATE 115200
/* PRCI clock related macros */
//TODO: Do we need a separate driver for this ?
#define SIFIVE_PRCI_BASE_ADDR 0x10000000
#define SIFIVE_PRCI_CLKMUXSTATUSREG 0x002C
#define SIFIVE_PRCI_CLKMUX_STATUS_TLCLKSEL (0x1 << 1)
static int sifive_u_cold_final_init(void)
{
@@ -57,8 +64,18 @@ static int sifive_u_pmp_region_info(u32 target_hart, u32 index,
static int sifive_u_console_init(void)
{
unsigned long peri_in_freq;
if (readl((volatile void *)SIFIVE_PRCI_BASE_ADDR +
SIFIVE_PRCI_CLKMUXSTATUSREG) &
SIFIVE_PRCI_CLKMUX_STATUS_TLCLKSEL){
peri_in_freq = SIFIVE_U_SYS_CLK;
} else {
peri_in_freq = SIFIVE_U_SYS_CLK / 2;
}
return sifive_uart_init(SIFIVE_U_UART0_ADDR,
SIFIVE_U_PERIPH_CLK, 115200);
peri_in_freq, SIFIVE_UART_BAUDRATE);
}
static int sifive_u_cold_irqchip_init(void)