diff options
Diffstat (limited to 'target/linux/ipq806x/patches/0169-clk-qcom-Add-support-for-Krait-clocks.patch')
| -rw-r--r-- | target/linux/ipq806x/patches/0169-clk-qcom-Add-support-for-Krait-clocks.patch | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/target/linux/ipq806x/patches/0169-clk-qcom-Add-support-for-Krait-clocks.patch b/target/linux/ipq806x/patches/0169-clk-qcom-Add-support-for-Krait-clocks.patch deleted file mode 100644 index 6e17acdc4e..0000000000 --- a/target/linux/ipq806x/patches/0169-clk-qcom-Add-support-for-Krait-clocks.patch +++ /dev/null @@ -1,190 +0,0 @@ -From 63ecfef8560631a15ee13129b2778cd4dffbcfe2 Mon Sep 17 00:00:00 2001 -From: Stephen Boyd <sboyd@codeaurora.org> -Date: Wed, 18 Jun 2014 14:18:31 -0700 -Subject: [PATCH 169/182] clk: qcom: Add support for Krait clocks - -The Krait clocks are made up of a series of muxes and a divider -that choose between a fixed rate clock and dedicated HFPLLs for -each CPU. Instead of using mmio accesses to remux parents, the -Krait implementation exposes the remux control via cp15 -registers. Support these clocks. - -Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> ---- - drivers/clk/qcom/Kconfig | 4 ++ - drivers/clk/qcom/Makefile | 1 + - drivers/clk/qcom/clk-krait.c | 121 ++++++++++++++++++++++++++++++++++++++++++ - drivers/clk/qcom/clk-krait.h | 22 ++++++++ - 4 files changed, 148 insertions(+) - create mode 100644 drivers/clk/qcom/clk-krait.c - create mode 100644 drivers/clk/qcom/clk-krait.h - ---- a/drivers/clk/qcom/Kconfig -+++ b/drivers/clk/qcom/Kconfig -@@ -61,3 +61,7 @@ config QCOM_HFPLL - Support for the high-frequency PLLs present on Qualcomm devices. - Say Y if you want to support CPU frequency scaling on devices - such as MSM8974, APQ8084, etc. -+ -+config KRAIT_CLOCKS -+ bool -+ select KRAIT_L2_ACCESSORS ---- a/drivers/clk/qcom/Makefile -+++ b/drivers/clk/qcom/Makefile -@@ -7,6 +7,7 @@ clk-qcom-y += clk-rcg.o - clk-qcom-y += clk-rcg2.o - clk-qcom-y += clk-branch.o - clk-qcom-y += clk-generic.o -+clk-qcom-$(CONFIG_KRAIT_CLOCKS) += clk-krait.o - clk-qcom-y += clk-hfpll.o - clk-qcom-y += reset.o - ---- /dev/null -+++ b/drivers/clk/qcom/clk-krait.c -@@ -0,0 +1,121 @@ -+/* -+ * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved. -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License version 2 and -+ * only version 2 as published by the Free Software Foundation. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ */ -+ -+#include <linux/kernel.h> -+#include <linux/module.h> -+#include <linux/init.h> -+#include <linux/io.h> -+#include <linux/delay.h> -+#include <linux/err.h> -+#include <linux/clk-provider.h> -+#include <linux/spinlock.h> -+ -+#include <asm/krait-l2-accessors.h> -+ -+#include "clk-krait.h" -+ -+/* Secondary and primary muxes share the same cp15 register */ -+static DEFINE_SPINLOCK(kpss_clock_reg_lock); -+ -+#define LPL_SHIFT 8 -+static void __kpss_mux_set_sel(struct mux_clk *mux, int sel) -+{ -+ unsigned long flags; -+ u32 regval; -+ -+ spin_lock_irqsave(&kpss_clock_reg_lock, flags); -+ regval = krait_get_l2_indirect_reg(mux->offset); -+ regval &= ~(mux->mask << mux->shift); -+ regval |= (sel & mux->mask) << mux->shift; -+ if (mux->priv) { -+ regval &= ~(mux->mask << (mux->shift + LPL_SHIFT)); -+ regval |= (sel & mux->mask) << (mux->shift + LPL_SHIFT); -+ } -+ krait_set_l2_indirect_reg(mux->offset, regval); -+ spin_unlock_irqrestore(&kpss_clock_reg_lock, flags); -+ -+ /* Wait for switch to complete. */ -+ mb(); -+ udelay(1); -+} -+ -+static int kpss_mux_set_sel(struct mux_clk *mux, int sel) -+{ -+ mux->en_mask = sel; -+ /* Don't touch mux if CPU is off as it won't work */ -+ if (__clk_is_enabled(mux->hw.clk)) -+ __kpss_mux_set_sel(mux, sel); -+ return 0; -+} -+ -+static int kpss_mux_get_sel(struct mux_clk *mux) -+{ -+ u32 sel; -+ -+ sel = krait_get_l2_indirect_reg(mux->offset); -+ sel >>= mux->shift; -+ sel &= mux->mask; -+ mux->en_mask = sel; -+ -+ return sel; -+} -+ -+static int kpss_mux_enable(struct mux_clk *mux) -+{ -+ __kpss_mux_set_sel(mux, mux->en_mask); -+ return 0; -+} -+ -+static void kpss_mux_disable(struct mux_clk *mux) -+{ -+ __kpss_mux_set_sel(mux, mux->safe_sel); -+} -+ -+const struct clk_mux_ops clk_mux_ops_kpss = { -+ .enable = kpss_mux_enable, -+ .disable = kpss_mux_disable, -+ .set_mux_sel = kpss_mux_set_sel, -+ .get_mux_sel = kpss_mux_get_sel, -+}; -+EXPORT_SYMBOL_GPL(clk_mux_ops_kpss); -+ -+/* -+ * The divider can divide by 2, 4, 6 and 8. But we only really need div-2. So -+ * force it to div-2 during handoff and treat it like a fixed div-2 clock. -+ */ -+static int kpss_div2_get_div(struct div_clk *div) -+{ -+ unsigned long flags; -+ u32 regval; -+ int val; -+ -+ spin_lock_irqsave(&kpss_clock_reg_lock, flags); -+ regval = krait_get_l2_indirect_reg(div->offset); -+ val = (regval >> div->shift) & div->mask; -+ regval &= ~(div->mask << div->shift); -+ if (div->priv) -+ regval &= ~(div->mask << (div->shift + LPL_SHIFT)); -+ krait_set_l2_indirect_reg(div->offset, regval); -+ spin_unlock_irqrestore(&kpss_clock_reg_lock, flags); -+ -+ val = (val + 1) * 2; -+ WARN(val != 2, "Divider %s was configured to div-%d instead of 2!\n", -+ __clk_get_name(div->hw.clk), val); -+ -+ return 2; -+} -+ -+const struct clk_div_ops clk_div_ops_kpss_div2 = { -+ .get_div = kpss_div2_get_div, -+}; -+EXPORT_SYMBOL_GPL(clk_div_ops_kpss_div2); ---- /dev/null -+++ b/drivers/clk/qcom/clk-krait.h -@@ -0,0 +1,22 @@ -+/* -+ * Copyright (c) 2013, The Linux Foundation. All rights reserved. -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License version 2 and -+ * only version 2 as published by the Free Software Foundation. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ */ -+ -+#ifndef __SOC_QCOM_CLOCK_KRAIT_H -+#define __SOC_QCOM_CLOCK_KRAIT_H -+ -+#include <linux/clk/msm-clk-generic.h> -+ -+extern const struct clk_mux_ops clk_mux_ops_kpss; -+extern const struct clk_div_ops clk_div_ops_kpss_div2; -+ -+#endif |