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sunxi: Add clock_get_pll5p() function

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This is a preparation patch for making the pll5 "p" divisor configurable
through Kconfig.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
This commit is contained in:
Hans de Goede 2014-10-22 14:42:48 +02:00
parent 06beadb001
commit 9e54f6ee01
3 changed files with 15 additions and 0 deletions
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11
arch/arm/cpu/armv7/sunxi/clock_sun4i.c
View File

@ -180,6 +180,17 @@ void clock_set_pll1(unsigned int hz)
}
#endif
unsigned int clock_get_pll5p(void)
{
struct sunxi_ccm_reg *const ccm =
(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
uint32_t rval = readl(&ccm->pll5_cfg);
int n = ((rval & CCM_PLL5_CTRL_N_MASK) >> CCM_PLL5_CTRL_N_SHIFT);
int k = ((rval & CCM_PLL5_CTRL_K_MASK) >> CCM_PLL5_CTRL_K_SHIFT) + 1;
int p = ((rval & CCM_PLL5_CTRL_P_MASK) >> CCM_PLL5_CTRL_P_SHIFT);
return (24000000 * n * k) >> p;
}
unsigned int clock_get_pll6(void)
{
struct sunxi_ccm_reg *const ccm =

1
arch/arm/include/asm/arch-sunxi/clock.h
View File

@ -25,6 +25,7 @@
int clock_init(void);
int clock_twi_onoff(int port, int state);
void clock_set_pll1(unsigned int hz);
unsigned int clock_get_pll5p(void);
unsigned int clock_get_pll6(void);
void clock_init_safe(void);
void clock_init_uart(void);

3
arch/arm/include/asm/arch-sunxi/clock_sun4i.h
View File

@ -199,13 +199,16 @@ struct sunxi_ccm_reg {
#define CCM_PLL5_CTRL_M1_MASK CCM_PLL5_CTRL_M1(0x3)
#define CCM_PLL5_CTRL_M1_X(n) ((n) - 1)
#define CCM_PLL5_CTRL_K(n) (((n) & 0x3) << 4)
#define CCM_PLL5_CTRL_K_SHIFT 4
#define CCM_PLL5_CTRL_K_MASK CCM_PLL5_CTRL_K(0x3)
#define CCM_PLL5_CTRL_K_X(n) ((n) - 1)
#define CCM_PLL5_CTRL_LDO (0x1 << 7)
#define CCM_PLL5_CTRL_N(n) (((n) & 0x1f) << 8)
#define CCM_PLL5_CTRL_N_SHIFT 8
#define CCM_PLL5_CTRL_N_MASK CCM_PLL5_CTRL_N(0x1f)
#define CCM_PLL5_CTRL_N_X(n) (n)
#define CCM_PLL5_CTRL_P(n) (((n) & 0x3) << 16)
#define CCM_PLL5_CTRL_P_SHIFT 16
#define CCM_PLL5_CTRL_P_MASK CCM_PLL5_CTRL_P(0x3)
#define CCM_PLL5_CTRL_P_X(n) ((n) - 1)
#define CCM_PLL5_CTRL_BW (0x1 << 18)