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-rw-r--r--drivers/clk/tegra/clk-tegra210.c26
-rw-r--r--include/linux/clk/tegra.h2
2 files changed, 28 insertions, 0 deletions
diff --git a/drivers/clk/tegra/clk-tegra210.c b/drivers/clk/tegra/clk-tegra210.c
index 9a2512a6b419..f89d2a912273 100644
--- a/drivers/clk/tegra/clk-tegra210.c
+++ b/drivers/clk/tegra/clk-tegra210.c
@@ -2313,6 +2313,32 @@ static const char * const aclk_parents[] = {
"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,
void __iomem *pmc_base)
{
diff --git a/include/linux/clk/tegra.h b/include/linux/clk/tegra.h
index 7007a5f48080..e17d32831e28 100644
--- a/include/linux/clk/tegra.h
+++ b/include/linux/clk/tegra.h
@@ -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_sata_pll_hw_control_enable(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_ */