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clk: tegra: Handle UTMIPLL IDDQ

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Export UTMIPLL IDDQ functions. These will be needed when powergating the
XUSB partition.

Signed-off-by: BH Hsieh <bhsieh@nvidia.com>
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Peter De Schrijver
2017-02-28 17:19:24 +02:00
committed by Thierry Reding
parent 24c3ebef1a
commit 3843832fc8
2 changed files with 28 additions and 0 deletions
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26
drivers/clk/tegra/clk-tegra210.c
View File

@ -2313,6 +2313,32 @@ static const char * const aclk_parents[] = {
"clk_m" "clk_m"
}; };
void tegra210_put_utmipll_in_iddq(void)
{
u32 reg;
reg = readl_relaxed(clk_base + UTMIPLL_HW_PWRDN_CFG0);
if (reg & UTMIPLL_HW_PWRDN_CFG0_UTMIPLL_LOCK) {
pr_err("trying to assert IDDQ while UTMIPLL is locked\n");
return;
}
reg |= UTMIPLL_HW_PWRDN_CFG0_IDDQ_OVERRIDE;
writel_relaxed(reg, clk_base + UTMIPLL_HW_PWRDN_CFG0);
}
EXPORT_SYMBOL_GPL(tegra210_put_utmipll_in_iddq);
void tegra210_put_utmipll_out_iddq(void)
{
u32 reg;
reg = readl_relaxed(clk_base + UTMIPLL_HW_PWRDN_CFG0);
reg &= ~UTMIPLL_HW_PWRDN_CFG0_IDDQ_OVERRIDE;
writel_relaxed(reg, clk_base + UTMIPLL_HW_PWRDN_CFG0);
}
EXPORT_SYMBOL_GPL(tegra210_put_utmipll_out_iddq);
static __init void tegra210_periph_clk_init(void __iomem *clk_base, static __init void tegra210_periph_clk_init(void __iomem *clk_base,
void __iomem *pmc_base) void __iomem *pmc_base)
{ {

2
include/linux/clk/tegra.h
View File

@ -125,5 +125,7 @@ extern void tegra210_xusb_pll_hw_control_enable(void);
extern void tegra210_xusb_pll_hw_sequence_start(void); extern void tegra210_xusb_pll_hw_sequence_start(void);
extern void tegra210_sata_pll_hw_control_enable(void); extern void tegra210_sata_pll_hw_control_enable(void);
extern void tegra210_sata_pll_hw_sequence_start(void); extern void tegra210_sata_pll_hw_sequence_start(void);
extern void tegra210_put_utmipll_in_iddq(void);
extern void tegra210_put_utmipll_out_iddq(void);
#endif /* __LINUX_CLK_TEGRA_H_ */ #endif /* __LINUX_CLK_TEGRA_H_ */