clk: tegra: Handle UTMIPLL IDDQ
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>
diff --git a/drivers/clk/tegra/clk-tegra210.c b/drivers/clk/tegra/clk-tegra210.c
index 9a2512a..f89d2a9 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)
{
