diff options
| author | Peter De Schrijver <pdeschrijver@nvidia.com> | 2013-09-26 15:30:01 (GMT) |
|---|---|---|
| committer | Peter De Schrijver <pdeschrijver@nvidia.com> | 2013-11-26 16:43:58 (GMT) |
| commit | 642fb0cf517173948684122403d73513c8c8b033 (patch) | |
| tree | 207fe1800adbec7c7ad1bcb86b00851c7949bfd6 /drivers/clk/tegra/clk-pll.c | |
| parent | 897e1dde1ec1571a28545594633624927fa0a76e (diff) | |
| download | linux-642fb0cf517173948684122403d73513c8c8b033.tar.xz | |
clk: tegra: PLLE spread spectrum control
Add spread spectrum control for PLLE in Tegra114.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Diffstat (limited to 'drivers/clk/tegra/clk-pll.c')
| -rw-r--r-- | drivers/clk/tegra/clk-pll.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/drivers/clk/tegra/clk-pll.c b/drivers/clk/tegra/clk-pll.c index 197074a..c9d1e5c 100644 --- a/drivers/clk/tegra/clk-pll.c +++ b/drivers/clk/tegra/clk-pll.c @@ -77,7 +77,23 @@ #define PLLE_MISC_SETUP_VALUE (7 << PLLE_MISC_SETUP_BASE_SHIFT) #define PLLE_SS_CTRL 0x68 -#define PLLE_SS_DISABLE (7 << 10) +#define PLLE_SS_CNTL_BYPASS_SS BIT(10) +#define PLLE_SS_CNTL_INTERP_RESET BIT(11) +#define PLLE_SS_CNTL_SSC_BYP BIT(12) +#define PLLE_SS_CNTL_CENTER BIT(14) +#define PLLE_SS_CNTL_INVERT BIT(15) +#define PLLE_SS_DISABLE (PLLE_SS_CNTL_BYPASS_SS | PLLE_SS_CNTL_INTERP_RESET |\ + PLLE_SS_CNTL_SSC_BYP) +#define PLLE_SS_MAX_MASK 0x1ff +#define PLLE_SS_MAX_VAL 0x25 +#define PLLE_SS_INC_MASK (0xff << 16) +#define PLLE_SS_INC_VAL (0x1 << 16) +#define PLLE_SS_INCINTRV_MASK (0x3f << 24) +#define PLLE_SS_INCINTRV_VAL (0x20 << 24) +#define PLLE_SS_COEFFICIENTS_MASK \ + (PLLE_SS_MAX_MASK | PLLE_SS_INC_MASK | PLLE_SS_INCINTRV_MASK) +#define PLLE_SS_COEFFICIENTS_VAL \ + (PLLE_SS_MAX_VAL | PLLE_SS_INC_VAL | PLLE_SS_INCINTRV_VAL) #define PLLE_AUX_PLLP_SEL BIT(2) #define PLLE_AUX_ENABLE_SWCTL BIT(4) @@ -1217,6 +1233,18 @@ static int clk_plle_tegra114_enable(struct clk_hw *hw) if (ret < 0) goto out; + val = pll_readl(PLLE_SS_CTRL, pll); + val &= ~(PLLE_SS_CNTL_CENTER | PLLE_SS_CNTL_INVERT); + val &= ~PLLE_SS_COEFFICIENTS_MASK; + val |= PLLE_SS_COEFFICIENTS_VAL; + pll_writel(val, PLLE_SS_CTRL, pll); + val &= ~(PLLE_SS_CNTL_SSC_BYP | PLLE_SS_CNTL_BYPASS_SS); + pll_writel(val, PLLE_SS_CTRL, pll); + udelay(1); + val &= ~PLLE_SS_CNTL_INTERP_RESET; + pll_writel(val, PLLE_SS_CTRL, pll); + udelay(1); + /* TODO: enable hw control of xusb brick pll */ out: |