diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/cpu/armv7/sunxi/clock_sun6i.c | 55 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-sunxi/clock_sun4i.h | 1 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-sunxi/clock_sun6i.h | 14 |
3 files changed, 70 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/sunxi/clock_sun6i.c b/arch/arm/cpu/armv7/sunxi/clock_sun6i.c index 1d6f839fa7..3ab3b31867 100644 --- a/arch/arm/cpu/armv7/sunxi/clock_sun6i.c +++ b/arch/arm/cpu/armv7/sunxi/clock_sun6i.c @@ -170,6 +170,47 @@ void clock_set_pll5(unsigned int clk, bool sigma_delta_enable) udelay(5500); } +#ifdef CONFIG_MACH_SUN6I +void clock_set_mipi_pll(unsigned int clk) +{ + struct sunxi_ccm_reg * const ccm = + (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; + unsigned int k, m, n, value, diff; + unsigned best_k = 0, best_m = 0, best_n = 0, best_diff = 0xffffffff; + unsigned int src = clock_get_pll3(); + + /* All calculations are in KHz to avoid overflows */ + clk /= 1000; + src /= 1000; + + /* Pick the closest lower clock */ + for (k = 1; k <= 4; k++) { + for (m = 1; m <= 16; m++) { + for (n = 1; n <= 16; n++) { + value = src * n * k / m; + if (value > clk) + continue; + + diff = clk - value; + if (diff < best_diff) { + best_diff = diff; + best_k = k; + best_m = m; + best_n = n; + } + if (diff == 0) + goto done; + } + } + } + +done: + writel(CCM_MIPI_PLL_CTRL_EN | CCM_MIPI_PLL_CTRL_LDO_EN | + CCM_MIPI_PLL_CTRL_N(best_n) | CCM_MIPI_PLL_CTRL_K(best_k) | + CCM_MIPI_PLL_CTRL_M(best_m), &ccm->mipi_pll_cfg); +} +#endif + #ifdef CONFIG_MACH_SUN8I_A33 void clock_set_pll11(unsigned int clk, bool sigma_delta_enable) { @@ -210,6 +251,20 @@ unsigned int clock_get_pll6(void) return 24000000 * n * k / 2; } +unsigned int clock_get_mipi_pll(void) +{ + struct sunxi_ccm_reg *const ccm = + (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; + uint32_t rval = readl(&ccm->mipi_pll_cfg); + unsigned int n = ((rval & CCM_MIPI_PLL_CTRL_N_MASK) >> CCM_MIPI_PLL_CTRL_N_SHIFT) + 1; + unsigned int k = ((rval & CCM_MIPI_PLL_CTRL_K_MASK) >> CCM_MIPI_PLL_CTRL_K_SHIFT) + 1; + unsigned int m = ((rval & CCM_MIPI_PLL_CTRL_M_MASK) >> CCM_MIPI_PLL_CTRL_M_SHIFT) + 1; + unsigned int src = clock_get_pll3(); + + /* Multiply by 1000 after dividing by m to avoid integer overflows */ + return ((src / 1000) * n * k / m) * 1000; +} + void clock_set_de_mod_clock(u32 *clk_cfg, unsigned int hz) { int pll = clock_get_pll6() * 2; diff --git a/arch/arm/include/asm/arch-sunxi/clock_sun4i.h b/arch/arm/include/asm/arch-sunxi/clock_sun4i.h index 1a0b5251a0..0088bb9d0b 100644 --- a/arch/arm/include/asm/arch-sunxi/clock_sun4i.h +++ b/arch/arm/include/asm/arch-sunxi/clock_sun4i.h @@ -289,6 +289,7 @@ struct sunxi_ccm_reg { #define CCM_LCD_CH0_CTRL_PLL7 (1 << 24) #define CCM_LCD_CH0_CTRL_PLL3_2X (2 << 24) #define CCM_LCD_CH0_CTRL_PLL7_2X (3 << 24) +#define CCM_LCD_CH0_CTRL_MIPI_PLL 0 /* No mipi pll on sun4i/5i/7i */ #ifdef CONFIG_MACH_SUN5I #define CCM_LCD_CH0_CTRL_TVE_RST (0x1 << 29) #else diff --git a/arch/arm/include/asm/arch-sunxi/clock_sun6i.h b/arch/arm/include/asm/arch-sunxi/clock_sun6i.h index a197345540..9b7b90cfc6 100644 --- a/arch/arm/include/asm/arch-sunxi/clock_sun6i.h +++ b/arch/arm/include/asm/arch-sunxi/clock_sun6i.h @@ -202,6 +202,18 @@ struct sunxi_ccm_reg { #define CCM_PLL6_CTRL_K_SHIFT 4 #define CCM_PLL6_CTRL_K_MASK (0x3 << CCM_PLL6_CTRL_K_SHIFT) +#define CCM_MIPI_PLL_CTRL_M_SHIFT 0 +#define CCM_MIPI_PLL_CTRL_M_MASK (0xf << CCM_MIPI_PLL_CTRL_M_SHIFT) +#define CCM_MIPI_PLL_CTRL_M(n) ((((n) - 1) & 0xf) << 0) +#define CCM_MIPI_PLL_CTRL_K_SHIFT 4 +#define CCM_MIPI_PLL_CTRL_K_MASK (0x3 << CCM_MIPI_PLL_CTRL_K_SHIFT) +#define CCM_MIPI_PLL_CTRL_K(n) ((((n) - 1) & 0x3) << 4) +#define CCM_MIPI_PLL_CTRL_N_SHIFT 8 +#define CCM_MIPI_PLL_CTRL_N_MASK (0xf << CCM_MIPI_PLL_CTRL_N_SHIFT) +#define CCM_MIPI_PLL_CTRL_N(n) ((((n) - 1) & 0xf) << 8) +#define CCM_MIPI_PLL_CTRL_LDO_EN (0x3 << 22) +#define CCM_MIPI_PLL_CTRL_EN (0x1 << 31) + #define CCM_PLL11_CTRL_N(n) ((((n) - 1) & 0x3f) << 8) #define CCM_PLL11_CTRL_SIGMA_DELTA_EN (0x1 << 24) #define CCM_PLL11_CTRL_UPD (0x1 << 30) @@ -364,8 +376,10 @@ 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); +void clock_set_mipi_pll(unsigned int hz); unsigned int clock_get_pll3(void); unsigned int clock_get_pll6(void); +unsigned int clock_get_mipi_pll(void); #endif #endif /* _SUNXI_CLOCK_SUN6I_H */ |