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clk: tegra: Enable hardware control of PLLE 

Enable hardware control of PLLE spread-spectrum, IDDQ, and enable
controls when enabling PLLE.  The hardware (e.g. XUSB) using PLLE
will use these controls for power-saving optimizations.

Signed-off-by: Jim Lin <jilin@nvidia.com>
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit is contained in:
Jim Lin 2014-05-14 17:32:57 -07:00 committed by Mike Turquette
parent c675a00c2d
commit 2cfe16748b
1 changed files with 32 additions and 1 deletions
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33
drivers/clk/tegra/clk-pll.c
View File

@ -96,10 +96,20 @@
(PLLE_SS_MAX_VAL | PLLE_SS_INC_VAL | PLLE_SS_INCINTRV_VAL)
#define PLLE_AUX_PLLP_SEL BIT(2)
#define PLLE_AUX_USE_LOCKDET BIT(3)
#define PLLE_AUX_ENABLE_SWCTL BIT(4)
#define PLLE_AUX_SS_SWCTL BIT(6)
#define PLLE_AUX_SEQ_ENABLE BIT(24)
#define PLLE_AUX_SEQ_START_STATE BIT(25)
#define PLLE_AUX_PLLRE_SEL BIT(28)
#define XUSBIO_PLL_CFG0 0x51c
#define XUSBIO_PLL_CFG0_PADPLL_RESET_SWCTL BIT(0)
#define XUSBIO_PLL_CFG0_CLK_ENABLE_SWCTL BIT(2)
#define XUSBIO_PLL_CFG0_PADPLL_USE_LOCKDET BIT(6)
#define XUSBIO_PLL_CFG0_SEQ_ENABLE BIT(24)
#define XUSBIO_PLL_CFG0_SEQ_START_STATE BIT(25)
#define PLLE_MISC_PLLE_PTS BIT(8)
#define PLLE_MISC_IDDQ_SW_VALUE BIT(13)
#define PLLE_MISC_IDDQ_SW_CTRL BIT(14)
@ -1318,7 +1328,28 @@ static int clk_plle_tegra114_enable(struct clk_hw *hw)
pll_writel(val, PLLE_SS_CTRL, pll);
udelay(1);
/* TODO: enable hw control of xusb brick pll */
/* Enable hw control of xusb brick pll */
val = pll_readl_misc(pll);
val &= ~PLLE_MISC_IDDQ_SW_CTRL;
pll_writel_misc(val, pll);
val = pll_readl(pll->params->aux_reg, pll);
val |= (PLLE_AUX_USE_LOCKDET | PLLE_AUX_SEQ_START_STATE);
val &= ~(PLLE_AUX_ENABLE_SWCTL | PLLE_AUX_SS_SWCTL);
pll_writel(val, pll->params->aux_reg, pll);
udelay(1);
val |= PLLE_AUX_SEQ_ENABLE;
pll_writel(val, pll->params->aux_reg, pll);
val = pll_readl(XUSBIO_PLL_CFG0, pll);
val |= (XUSBIO_PLL_CFG0_PADPLL_USE_LOCKDET |
XUSBIO_PLL_CFG0_SEQ_START_STATE);
val &= ~(XUSBIO_PLL_CFG0_CLK_ENABLE_SWCTL |
XUSBIO_PLL_CFG0_PADPLL_RESET_SWCTL);
pll_writel(val, XUSBIO_PLL_CFG0, pll);
udelay(1);
val |= XUSBIO_PLL_CFG0_SEQ_ENABLE;
pll_writel(val, XUSBIO_PLL_CFG0, pll);
out:
if (pll->lock)