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Message-ID: <1380209654-25458-1-git-send-email-pdeschrijver@nvidia.com> Date: Thu, 26 Sep 2013 18:34:05 +0300 From: Peter De Schrijver <pdeschrijver@...dia.com> To: Peter De Schrijver <pdeschrijver@...dia.com> CC: Mike Turquette <mturquette@...aro.org>, Stephen Warren <swarren@...dotorg.org>, Prashant Gaikwad <pgaikwad@...dia.com>, <linux-arm-kernel@...ts.infradead.org>, <linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org> Subject: [PATCH] clk: tegra: PLLE spread spectrum control Add spread spectrum control for PLLE in Tegra114. Signed-off-by: Peter De Schrijver <pdeschrijver@...dia.com> --- 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 87f0533..f0577e3 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) @@ -1286,6 +1302,18 @@ 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: -- 1.7.7.rc0.72.g4b5ea.dirty -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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