Add a helper function to get the pll3 clock rate.
Signed-off-by: Hans de Goede <hdego...@redhat.com>
---
arch/arm/cpu/armv7/sunxi/clock_sun4i.c | 9 +++++++++
arch/arm/cpu/armv7/sunxi/clock_sun6i.c | 12 ++++++++++++
arch/arm/include/asm/arch-sunxi/clock_sun4i.h | 3 +++
arch/arm/include/asm/arch-sunxi/clock_sun6i.h | 5 +++++
4 files changed, 29 insertions(+)
diff --git a/arch/arm/cpu/armv7/sunxi/clock_sun4i.c
b/arch/arm/cpu/armv7/sunxi/clock_sun4i.c
index c3e04af..7c8eff9 100644
--- a/arch/arm/cpu/armv7/sunxi/clock_sun4i.c
+++ b/arch/arm/cpu/armv7/sunxi/clock_sun4i.c
@@ -198,6 +198,15 @@ void clock_set_pll3(unsigned int clk)
CCM_PLL3_CTRL_M(clk / 3000000), &ccm->pll3_cfg);
}
+unsigned int clock_get_pll3(void)
+{
+ struct sunxi_ccm_reg *const ccm =
+ (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
+ uint32_t rval = readl(&ccm->pll3_cfg);
+ int m = ((rval & CCM_PLL3_CTRL_M_MASK) >> CCM_PLL3_CTRL_M_SHIFT);
+ return 3000000 * m;
+}
+
unsigned int clock_get_pll5p(void)
{
struct sunxi_ccm_reg *const ccm =
diff --git a/arch/arm/cpu/armv7/sunxi/clock_sun6i.c
b/arch/arm/cpu/armv7/sunxi/clock_sun6i.c
index 3bfa122..1d6f839 100644
--- a/arch/arm/cpu/armv7/sunxi/clock_sun6i.c
+++ b/arch/arm/cpu/armv7/sunxi/clock_sun6i.c
@@ -188,6 +188,18 @@ void clock_set_pll11(unsigned int clk, bool
sigma_delta_enable)
}
#endif
+unsigned int clock_get_pll3(void)
+{
+ struct sunxi_ccm_reg *const ccm =
+ (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
+ uint32_t rval = readl(&ccm->pll3_cfg);
+ int n = ((rval & CCM_PLL3_CTRL_N_MASK) >> CCM_PLL3_CTRL_N_SHIFT) + 1;
+ int m = ((rval & CCM_PLL3_CTRL_M_MASK) >> CCM_PLL3_CTRL_M_SHIFT) + 1;
+
+ /* Multiply by 1000 after dividing by m to avoid integer overflows */
+ return (24000 * n / m) * 1000;
+}
+
unsigned int clock_get_pll6(void)
{
struct sunxi_ccm_reg *const ccm =
diff --git a/arch/arm/include/asm/arch-sunxi/clock_sun4i.h
b/arch/arm/include/asm/arch-sunxi/clock_sun4i.h
index b397809..1a0b525 100644
--- a/arch/arm/include/asm/arch-sunxi/clock_sun4i.h
+++ b/arch/arm/include/asm/arch-sunxi/clock_sun4i.h
@@ -208,6 +208,8 @@ struct sunxi_ccm_reg {
#define CCM_AHB_GATE_DLL (0x1 << 15)
#define CCM_AHB_GATE_ACE (0x1 << 16)
+#define CCM_PLL3_CTRL_M_SHIFT 0
+#define CCM_PLL3_CTRL_M_MASK (0x7f << CCM_PLL3_CTRL_M_SHIFT)
#define CCM_PLL3_CTRL_M(n) (((n) & 0x7f) << 0)
#define CCM_PLL3_CTRL_INTEGER_MODE (0x1 << 15)
#define CCM_PLL3_CTRL_EN (0x1 << 31)
@@ -347,6 +349,7 @@ struct sunxi_ccm_reg {
#ifndef __ASSEMBLY__
void clock_set_pll1(unsigned int hz);
void clock_set_pll3(unsigned int hz);
+unsigned int clock_get_pll3(void);
unsigned int clock_get_pll5p(void);
unsigned int clock_get_pll6(void);
#endif
diff --git a/arch/arm/include/asm/arch-sunxi/clock_sun6i.h
b/arch/arm/include/asm/arch-sunxi/clock_sun6i.h
index 06c6feb..a197345 100644
--- a/arch/arm/include/asm/arch-sunxi/clock_sun6i.h
+++ b/arch/arm/include/asm/arch-sunxi/clock_sun6i.h
@@ -179,7 +179,11 @@ struct sunxi_ccm_reg {
#define CCM_PLL1_CTRL_P(n) (((n) & 0x3) << 16)
#define CCM_PLL1_CTRL_EN (0x1 << 31)
+#define CCM_PLL3_CTRL_M_SHIFT 0
+#define CCM_PLL3_CTRL_M_MASK (0xf << CCM_PLL3_CTRL_M_SHIFT)
#define CCM_PLL3_CTRL_M(n) ((((n) - 1) & 0xf) << 0)
+#define CCM_PLL3_CTRL_N_SHIFT 8
+#define CCM_PLL3_CTRL_N_MASK (0x7f << CCM_PLL3_CTRL_N_SHIFT)
#define CCM_PLL3_CTRL_N(n) ((((n) - 1) & 0x7f) << 8)
#define CCM_PLL3_CTRL_INTEGER_MODE (0x1 << 24)
#define CCM_PLL3_CTRL_EN (0x1 << 31)
@@ -360,6 +364,7 @@ void clock_set_pll1(unsigned int hz);
void clock_set_pll3(unsigned int hz);
void clock_set_pll5(unsigned int clk, bool sigma_delta_enable);
void clock_set_pll11(unsigned int clk, bool sigma_delta_enable);
+unsigned int clock_get_pll3(void);
unsigned int clock_get_pll6(void);
#endif
--
2.4.3
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