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drivers: serial: uart_sifive: Get clock frequency from device tree

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Move to getting the clock frequency of the uart from the device tree
instead of a define in the board file.  Cleaned up hifive1 board code to
reflect this change in addition to the driver.

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
This commit is contained in:
Kumar Gala 2018-10-04 17:06:25 -05:00 • committed by Kumar Gala
commit 5a24afadb8
4 changed files with 9 additions and 12 deletions
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10
boards/riscv32/hifive1/board.h
View file

@ -10,14 +10,4 @@
#include <soc.h>
/*
* UART clock configurations
*
* Define them here so that it can be replaced by global variables
* on other boards where the uart clock is determined dynamically
* following the PLL configuration
*/
#define uart_sifive_port_0_clk_freq 16000000
#define uart_sifive_port_1_clk_freq 16000000
#endif /* __INC_BOARD_H */

2
boards/riscv32/hifive1/dts.fixup
View file

@ -46,10 +46,12 @@
#define CONFIG_SIFIVE_UART_0_IRQ_0 SIFIVE_UART0_10013000_IRQ_0
#define CONFIG_SIFIVE_UART_0_LABEL SIFIVE_UART0_10013000_LABEL
#define CONFIG_SIFIVE_UART_0_SIZE SIFIVE_UART0_10013000_SIZE
#define CONFIG_SIFIVE_UART_0_CLK_FREQ SIFIVE_UART0_10013000_CLOCK_FREQUENCY
/* UART 1 */
#define CONFIG_SIFIVE_UART_1_BASE_ADDR SIFIVE_UART0_10023000_BASE_ADDRESS
#define CONFIG_SIFIVE_UART_1_CURRENT_SPEED SIFIVE_UART0_10023000_CURRENT_SPEED
#define CONFIG_SIFIVE_UART_1_IRQ_0 SIFIVE_UART0_10023000_IRQ_0
#define CONFIG_SIFIVE_UART_1_SIZE SIFIVE_UART0_10023000_SIZE
#define CONFIG_SIFIVE_UART_1_CLK_FREQ SIFIVE_UART0_10023000_CLOCK_FREQUENCY

5
boards/riscv32/hifive1/hifive1.dts
View file

@ -39,6 +39,11 @@
&uart0 {
status = "ok";
current-speed = <115200>;
clock-frequency = <16000000>;
};
&uart1 {
clock-frequency = <16000000>;
};
&spi0 {

4
drivers/serial/uart_sifive.c
View file

@ -386,7 +386,7 @@ static void uart_sifive_irq_cfg_func_0(void);
static const struct uart_sifive_device_config uart_sifive_dev_cfg_0 = {
.port = CONFIG_SIFIVE_UART_0_BASE_ADDR,
.sys_clk_freq = uart_sifive_port_0_clk_freq,
.sys_clk_freq = CONFIG_SIFIVE_UART_0_CLK_FREQ,
.baud_rate = CONFIG_SIFIVE_UART_0_CURRENT_SPEED,
.rxcnt_irq = CONFIG_UART_SIFIVE_PORT_0_RXCNT_IRQ,
.txcnt_irq = CONFIG_UART_SIFIVE_PORT_0_TXCNT_IRQ,
@ -425,7 +425,7 @@ static void uart_sifive_irq_cfg_func_1(void);
static const struct uart_sifive_device_config uart_sifive_dev_cfg_1 = {
.port = CONFIG_SIFIVE_UART_1_BASE_ADDR,
.sys_clk_freq = uart_sifive_port_1_clk_freq,
.sys_clk_freq = CONFIG_SIFIVE_UART_1_CLK_FREQ,
.baud_rate = CONFIG_SIFIVE_UART_1_CURRENT_SPEED,
.rxcnt_irq = CONFIG_UART_SIFIVE_PORT_1_RXCNT_IRQ,
.txcnt_irq = CONFIG_UART_SIFIVE_PORT_1_TXCNT_IRQ,