diff options
Diffstat (limited to 'target/linux/ipq806x/patches-4.1/140-clk-qcom-Add-support-for-Krait-clocks.patch')
-rw-r--r-- | target/linux/ipq806x/patches-4.1/140-clk-qcom-Add-support-for-Krait-clocks.patch | 271 |
1 files changed, 0 insertions, 271 deletions
diff --git a/target/linux/ipq806x/patches-4.1/140-clk-qcom-Add-support-for-Krait-clocks.patch b/target/linux/ipq806x/patches-4.1/140-clk-qcom-Add-support-for-Krait-clocks.patch deleted file mode 100644 index 5fcc787c89..0000000000 --- a/target/linux/ipq806x/patches-4.1/140-clk-qcom-Add-support-for-Krait-clocks.patch +++ /dev/null @@ -1,271 +0,0 @@ -Content-Type: text/plain; charset="utf-8" -MIME-Version: 1.0 -Content-Transfer-Encoding: 7bit -Subject: [v3,09/13] clk: qcom: Add support for Krait clocks -From: Stephen Boyd <sboyd@codeaurora.org> -X-Patchwork-Id: 6063251 -Message-Id: <1426920332-9340-10-git-send-email-sboyd@codeaurora.org> -To: Mike Turquette <mturquette@linaro.org>, Stephen Boyd <sboyd@codeaurora.org> -Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, - linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, - Viresh Kumar <viresh.kumar@linaro.org> -Date: Fri, 20 Mar 2015 23:45:28 -0700 - -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 | 166 +++++++++++++++++++++++++++++++++++++++++++ - drivers/clk/qcom/clk-krait.h | 49 +++++++++++++ - 4 files changed, 220 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 -@@ -105,3 +105,7 @@ 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 -@@ -8,6 +8,7 @@ clk-qcom-y += clk-rcg2.o - clk-qcom-y += clk-branch.o - clk-qcom-y += clk-regmap-divider.o - clk-qcom-y += clk-regmap-mux.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 +1,166 @@ -+/* -+ * 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(krait_clock_reg_lock); -+ -+#define LPL_SHIFT 8 -+static void __krait_mux_set_sel(struct krait_mux_clk *mux, int sel) -+{ -+ unsigned long flags; -+ u32 regval; -+ -+ spin_lock_irqsave(&krait_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->lpl) { -+ 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(&krait_clock_reg_lock, flags); -+ -+ /* Wait for switch to complete. */ -+ mb(); -+ udelay(1); -+} -+ -+static int krait_mux_set_parent(struct clk_hw *hw, u8 index) -+{ -+ struct krait_mux_clk *mux = to_krait_mux_clk(hw); -+ u32 sel; -+ -+ sel = clk_mux_reindex(index, mux->parent_map, 0); -+ mux->en_mask = sel; -+ /* Don't touch mux if CPU is off as it won't work */ -+ if (__clk_is_enabled(hw->clk)) -+ __krait_mux_set_sel(mux, sel); -+ return 0; -+} -+ -+static u8 krait_mux_get_parent(struct clk_hw *hw) -+{ -+ struct krait_mux_clk *mux = to_krait_mux_clk(hw); -+ u32 sel; -+ -+ sel = krait_get_l2_indirect_reg(mux->offset); -+ sel >>= mux->shift; -+ sel &= mux->mask; -+ mux->en_mask = sel; -+ -+ return clk_mux_get_parent(hw, sel, mux->parent_map, 0); -+} -+ -+static struct clk_hw *krait_mux_get_safe_parent(struct clk_hw *hw) -+{ -+ int i; -+ struct krait_mux_clk *mux = to_krait_mux_clk(hw); -+ int num_parents = __clk_get_num_parents(hw->clk); -+ -+ i = mux->safe_sel; -+ for (i = 0; i < num_parents; i++) -+ if (mux->safe_sel == mux->parent_map[i]) -+ break; -+ -+ return __clk_get_hw(clk_get_parent_by_index(hw->clk, i)); -+} -+ -+static int krait_mux_enable(struct clk_hw *hw) -+{ -+ struct krait_mux_clk *mux = to_krait_mux_clk(hw); -+ -+ __krait_mux_set_sel(mux, mux->en_mask); -+ -+ return 0; -+} -+ -+static void krait_mux_disable(struct clk_hw *hw) -+{ -+ struct krait_mux_clk *mux = to_krait_mux_clk(hw); -+ -+ __krait_mux_set_sel(mux, mux->safe_sel); -+} -+ -+const struct clk_ops krait_mux_clk_ops = { -+ .enable = krait_mux_enable, -+ .disable = krait_mux_disable, -+ .set_parent = krait_mux_set_parent, -+ .get_parent = krait_mux_get_parent, -+ .determine_rate = __clk_mux_determine_rate_closest, -+ .get_safe_parent = krait_mux_get_safe_parent, -+}; -+EXPORT_SYMBOL_GPL(krait_mux_clk_ops); -+ -+/* The divider can divide by 2, 4, 6 and 8. But we only really need div-2. */ -+static long krait_div2_round_rate(struct clk_hw *hw, unsigned long rate, -+ unsigned long *parent_rate) -+{ -+ *parent_rate = __clk_round_rate(__clk_get_parent(hw->clk), rate * 2); -+ return DIV_ROUND_UP(*parent_rate, 2); -+} -+ -+static int krait_div2_set_rate(struct clk_hw *hw, unsigned long rate, -+ unsigned long parent_rate) -+{ -+ struct krait_div2_clk *d = to_krait_div2_clk(hw); -+ unsigned long flags; -+ u32 val; -+ u32 mask = BIT(d->width) - 1; -+ -+ if (d->lpl) -+ mask = mask << (d->shift + LPL_SHIFT) | mask << d->shift; -+ -+ spin_lock_irqsave(&krait_clock_reg_lock, flags); -+ val = krait_get_l2_indirect_reg(d->offset); -+ val &= ~mask; -+ krait_set_l2_indirect_reg(d->offset, val); -+ spin_unlock_irqrestore(&krait_clock_reg_lock, flags); -+ -+ return 0; -+} -+ -+static unsigned long -+krait_div2_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) -+{ -+ struct krait_div2_clk *d = to_krait_div2_clk(hw); -+ u32 mask = BIT(d->width) - 1; -+ u32 div; -+ -+ div = krait_get_l2_indirect_reg(d->offset); -+ div >>= d->shift; -+ div &= mask; -+ div = (div + 1) * 2; -+ -+ return DIV_ROUND_UP(parent_rate, div); -+} -+ -+const struct clk_ops krait_div2_clk_ops = { -+ .round_rate = krait_div2_round_rate, -+ .set_rate = krait_div2_set_rate, -+ .recalc_rate = krait_div2_recalc_rate, -+}; -+EXPORT_SYMBOL_GPL(krait_div2_clk_ops); ---- /dev/null -+++ b/drivers/clk/qcom/clk-krait.h -@@ -0,0 +1,49 @@ -+/* -+ * 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 __QCOM_CLK_KRAIT_H -+#define __QCOM_CLK_KRAIT_H -+ -+#include <linux/clk-provider.h> -+ -+struct krait_mux_clk { -+ unsigned int *parent_map; -+ bool has_safe_parent; -+ u8 safe_sel; -+ u32 offset; -+ u32 mask; -+ u32 shift; -+ u32 en_mask; -+ bool lpl; -+ -+ struct clk_hw hw; -+}; -+ -+#define to_krait_mux_clk(_hw) container_of(_hw, struct krait_mux_clk, hw) -+ -+extern const struct clk_ops krait_mux_clk_ops; -+ -+struct krait_div2_clk { -+ u32 offset; -+ u8 width; -+ u32 shift; -+ bool lpl; -+ -+ struct clk_hw hw; -+}; -+ -+#define to_krait_div2_clk(_hw) container_of(_hw, struct krait_div2_clk, hw) -+ -+extern const struct clk_ops krait_div2_clk_ops; -+ -+#endif |