From: Peter De Schrijver <pdeschrijver@nvidia.com>
Date: Tue, 28 Feb 2017 15:19:24 +0000 (+0200)
Subject: clk: tegra: Handle UTMIPLL IDDQ
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3843832fc8cadc2d48ba4ea4cd350a696906ac42;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

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 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_ */