diff options
Diffstat (limited to 'arch/arm/mach-s3c2440')
| -rw-r--r-- | arch/arm/mach-s3c2440/clock.c | 37 | ||||
| -rw-r--r-- | arch/arm/mach-s3c2440/mach-rx1950.c | 4 | ||||
| -rw-r--r-- | arch/arm/mach-s3c2440/mach-rx3715.c | 4 |
3 files changed, 41 insertions, 4 deletions
diff --git a/arch/arm/mach-s3c2440/clock.c b/arch/arm/mach-s3c2440/clock.c index f9e6bdaf41d2..f85853c5d5eb 100644 --- a/arch/arm/mach-s3c2440/clock.c +++ b/arch/arm/mach-s3c2440/clock.c @@ -34,6 +34,7 @@ #include <linux/mutex.h> #include <linux/clk.h> #include <linux/io.h> +#include <linux/serial_core.h> #include <mach/hardware.h> #include <linux/atomic.h> @@ -43,6 +44,7 @@ #include <plat/clock.h> #include <plat/cpu.h> +#include <plat/regs-serial.h> /* S3C2440 extended clock support */ @@ -108,6 +110,40 @@ static struct clk s3c2440_clk_ac97 = { .ctrlbit = S3C2440_CLKCON_CAMERA, }; +static unsigned long s3c2440_fclk_n_getrate(struct clk *clk) +{ + unsigned long ucon0, ucon1, ucon2, divisor; + + /* the fun of calculating the uart divisors on the s3c2440 */ + ucon0 = __raw_readl(S3C24XX_VA_UART0 + S3C2410_UCON); + ucon1 = __raw_readl(S3C24XX_VA_UART1 + S3C2410_UCON); + ucon2 = __raw_readl(S3C24XX_VA_UART2 + S3C2410_UCON); + + ucon0 &= S3C2440_UCON0_DIVMASK; + ucon1 &= S3C2440_UCON1_DIVMASK; + ucon2 &= S3C2440_UCON2_DIVMASK; + + if (ucon0 != 0) + divisor = (ucon0 >> S3C2440_UCON_DIVSHIFT) + 6; + else if (ucon1 != 0) + divisor = (ucon1 >> S3C2440_UCON_DIVSHIFT) + 21; + else if (ucon2 != 0) + divisor = (ucon2 >> S3C2440_UCON_DIVSHIFT) + 36; + else + /* manual calims 44, seems to be 9 */ + divisor = 9; + + return clk_get_rate(clk->parent) / divisor; +} + +static struct clk s3c2440_clk_fclk_n = { + .name = "fclk_n", + .parent = &clk_f, + .ops = &(struct clk_ops) { + .get_rate = s3c2440_fclk_n_getrate, + }, +}; + static int s3c2440_clk_add(struct sys_device *sysdev) { struct clk *clock_upll; @@ -126,6 +162,7 @@ static int s3c2440_clk_add(struct sys_device *sysdev) s3c2440_clk_cam.parent = clock_h; s3c2440_clk_ac97.parent = clock_p; s3c2440_clk_cam_upll.parent = clock_upll; + s3c24xx_register_clock(&s3c2440_clk_fclk_n); s3c24xx_register_clock(&s3c2440_clk_ac97); s3c24xx_register_clock(&s3c2440_clk_cam); diff --git a/arch/arm/mach-s3c2440/mach-rx1950.c b/arch/arm/mach-s3c2440/mach-rx1950.c index 0d3453bf567c..094c4bff7fe4 100644 --- a/arch/arm/mach-s3c2440/mach-rx1950.c +++ b/arch/arm/mach-s3c2440/mach-rx1950.c @@ -70,8 +70,8 @@ static struct map_desc rx1950_iodesc[] __initdata = { static struct s3c24xx_uart_clksrc rx1950_serial_clocks[] = { [0] = { - .name = "fclk", - .divisor = 0x0a, + .name = "fclk_n", + .divisor = 1, .min_baud = 0, .max_baud = 0, }, diff --git a/arch/arm/mach-s3c2440/mach-rx3715.c b/arch/arm/mach-s3c2440/mach-rx3715.c index e19499c2f909..f934f5b88a4a 100644 --- a/arch/arm/mach-s3c2440/mach-rx3715.c +++ b/arch/arm/mach-s3c2440/mach-rx3715.c @@ -70,8 +70,8 @@ static struct map_desc rx3715_iodesc[] __initdata = { static struct s3c24xx_uart_clksrc rx3715_serial_clocks[] = { [0] = { - .name = "fclk", - .divisor = 0, + .name = "fclk_n", + .divisor = 1, .min_baud = 0, .max_baud = 0, } |