This patch adds common function to enable/disable omap2/3 uart
clocks. Enabled uarts are passed by bootloader in atags and clocks for
these enabled uarts are touched.
Signed-off-by: Jouni Hogander <jouni.hogander@xxxxxxxxx>
---
arch/arm/mach-omap2/serial.c | 79 ++++++++++++++---------------------
include/asm-arm/arch-omap/common.h | 1 +
2 files changed, 33 insertions(+), 47 deletions(-)
diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c
index c9697a4..54ab7af 100644
--- a/arch/arm/mach-omap2/serial.c
+++ b/arch/arm/mach-omap2/serial.c
@@ -3,7 +3,7 @@
*
* OMAP2 serial support.
*
- * Copyright (C) 2005 Nokia Corporation
+ * Copyright (C) 2005-2008 Nokia Corporation
* Author: Paul Mundt <paul.mundt@xxxxxxxxx>
*
* Based off of arch/arm/mach-omap/omap1/serial.c
@@ -23,12 +23,8 @@
#include <asm/arch/common.h>
#include <asm/arch/board.h>
-static struct clk * uart1_ick = NULL;
-static struct clk * uart1_fck = NULL;
-static struct clk * uart2_ick = NULL;
-static struct clk * uart2_fck = NULL;
-static struct clk * uart3_ick = NULL;
-static struct clk * uart3_fck = NULL;
+static struct clk *uart_ick[OMAP_MAX_NR_PORTS];
+static struct clk *uart_fck[OMAP_MAX_NR_PORTS];
static struct plat_serial8250_port serial_platform_data[] = {
{
@@ -87,10 +83,24 @@ static inline void __init omap_serial_reset(struct plat_serial8250_port *p)
serial_write_reg(p, UART_OMAP_SYSC, (0x02 << 3) | (1 << 2) | (1 << 0));
}
+void omap_serial_enable_clocks(int enable)
+{
+ int i;
+ for (i = 0; i < OMAP_MAX_NR_PORTS; i++) {
+ if (uart_ick[i])
+ enable ? clk_enable(uart_ick[i]) :
+ clk_disable(uart_ick[i]);
+ if (uart_fck[i])
+ enable ? clk_enable(uart_fck[i]) :
+ clk_disable(uart_fck[i]);
+ }
+}
+
void __init omap_serial_init(void)
{
int i;
const struct omap_uart_config *info;
+ char name[16];
/*
* Make sure the serial ports are muxed on at this point.
@@ -112,47 +122,22 @@ void __init omap_serial_init(void)
continue;
}
- switch (i) {
- case 0:
- uart1_ick = clk_get(NULL, "uart1_ick");
- if (IS_ERR(uart1_ick))
- printk("Could not get uart1_ick\n");
- else
- clk_enable(uart1_ick);
-
- uart1_fck = clk_get(NULL, "uart1_fck");
- if (IS_ERR(uart1_fck))
- printk("Could not get uart1_fck\n");
- else
- clk_enable(uart1_fck);
- break;
- case 1:
- uart2_ick = clk_get(NULL, "uart2_ick");
- if (IS_ERR(uart2_ick))
- printk("Could not get uart2_ick\n");
- else
- clk_enable(uart2_ick);
-
- uart2_fck = clk_get(NULL, "uart2_fck");
- if (IS_ERR(uart2_fck))
- printk("Could not get uart2_fck\n");
- else
- clk_enable(uart2_fck);
- break;
- case 2:
- uart3_ick = clk_get(NULL, "uart3_ick");
- if (IS_ERR(uart3_ick))
- printk("Could not get uart3_ick\n");
- else
- clk_enable(uart3_ick);
-
- uart3_fck = clk_get(NULL, "uart3_fck");
- if (IS_ERR(uart3_fck))
- printk("Could not get uart3_fck\n");
- else
- clk_enable(uart3_fck);
- break;
+ sprintf(name, "uart%d_ick", i+1);
+ uart_ick[i] = clk_get(NULL, name);
+ if (IS_ERR(uart_ick[i])) {
+ printk(KERN_ERR "Could not get uart%d_ick\n", i+1);
+ uart_ick[i] = NULL;
+ }
+ else
+ clk_enable(uart_ick[i]);
+ sprintf(name, "uart%d_fck", i+1);
+ uart_fck[i] = clk_get(NULL, name);
+ if (IS_ERR(uart_fck[i])) {
+ printk(KERN_ERR "Could not get uart%d_fck\n", i+1);
+ uart_ick[i] = NULL;
}
+ else
+ clk_enable(uart_fck[i]);
omap_serial_reset(p);
}
diff --git a/include/asm-arm/arch-omap/common.h b/include/asm-arm/arch-omap/common.h
index 36a3b62..6c072de 100644
--- a/include/asm-arm/arch-omap/common.h
+++ b/include/asm-arm/arch-omap/common.h
@@ -34,6 +34,7 @@ struct sys_timer;
extern void omap_map_common_io(void);
extern struct sys_timer omap_timer;
extern void omap_serial_init(void);
+extern void omap_serial_enable_clocks(int enable);
#ifdef CONFIG_I2C_OMAP
extern int omap_register_i2c_bus(int bus_id, u32 clkrate,
struct i2c_board_info const *info,
--
1.5.5
--
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