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bcm53xx: use the latest 6th version of ILP clock driver patch

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It still wasn't accepted, so don't switch to 0xx prefix yet.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
This commit is contained in:
Rafał Miłecki 2016-08-26 17:02:30 +02:00
parent 8965cf90f1
commit 1bb914dbed
2 changed files with 67 additions and 44 deletions
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109
target/linux/bcm53xx/patches-4.4/830-clk-bcm-Add-driver-for-Northstar-ILP-clock.patch → target/linux/bcm53xx/patches-4.4/830-clk-bcm-Add-driver-for-BCM53573-ILP-clock.patch
View File

@ -1,15 +1,15 @@
From 65acc8219d271d29b918ae4d6fe4d520203f25ae Mon Sep 17 00:00:00 2001 From 1909c8bf322e0bbb068d57c370c5b64906a8c5a7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
Date: Fri, 29 Jul 2016 14:48:19 +0200 Date: Fri, 29 Jul 2016 14:48:19 +0200
Subject: [PATCH V3] clk: bcm: Add driver for Northstar ILP clock Subject: [PATCH V6] clk: bcm: Add driver for BCM53573 ILP clock
MIME-Version: 1.0 MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8 Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit Content-Transfer-Encoding: 8bit
This clock is present on cheaper Northstar devices like BCM53573 or This clock is present on BCM53573 devices (including BCM47189) that use
BCM47189 using Corex-A7. ILP is a part of PMU (Power Management Unit) Cortex-A7. ILP is a part of PMU (Power Management Unit) and so it should
and so it should be defined as one of its subnodes (subdevices). For be defined as one of its subnodes (subdevices). For more details see
more details see Documentation entry. Documentation entry.
Unfortunately there isn't a set of registers related to ILP clock only. Unfortunately there isn't a set of registers related to ILP clock only.
We use registers 0x66c, 0x674 and 0x6dc and between them there are e.g. We use registers 0x66c, 0x674 and 0x6dc and between them there are e.g.
@ -26,25 +26,37 @@ V2: Rebase on top of clk-next
V3: Drop #include <linux/moduleh> V3: Drop #include <linux/moduleh>
Make ILP DT entry part of PMU Make ILP DT entry part of PMU
Describe ILP as subdevice of PMU in Documentation Describe ILP as subdevice of PMU in Documentation
V4: Use BCM53573 name as suggested by Jon and Ray. It seems "Northstar"
(even if used in some resources) should be used in relation to
Cortex-A9 devices only.
V5: Rename remaining "ns" references to "bcm53573", sorry, I sent V4 too
early.
V6: Drop #include <linux/clk.h>
Use "int" as type where it matches usage
Add cpu_relax() in the loop
Add disable callback
Use _hw_ functions for registering struct clk_hw (new API)
Thanks a lot Stephen!
--- ---
.../devicetree/bindings/clock/brcm,ns-ilp.txt | 40 ++++++ .../bindings/clock/brcm,bcm53573-ilp.txt | 40 ++++++
drivers/clk/bcm/Makefile | 1 + drivers/clk/bcm/Makefile | 1 +
drivers/clk/bcm/clk-ns-ilp.c | 146 +++++++++++++++++++++ drivers/clk/bcm/clk-bcm53573-ilp.c | 157 +++++++++++++++++++++
3 files changed, 187 insertions(+) 3 files changed, 198 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/brcm,ns-ilp.txt create mode 100644 Documentation/devicetree/bindings/clock/brcm,bcm53573-ilp.txt
create mode 100644 drivers/clk/bcm/clk-ns-ilp.c create mode 100644 drivers/clk/bcm/clk-bcm53573-ilp.c
--- /dev/null --- /dev/null
+++ b/Documentation/devicetree/bindings/clock/brcm,ns-ilp.txt +++ b/Documentation/devicetree/bindings/clock/brcm,bcm53573-ilp.txt
@@ -0,0 +1,40 @@ @@ -0,0 +1,40 @@
+Broadcom Northstar ILP clock +Broadcom BCM53573 ILP clock
+============================ +===========================
+ +
+This binding uses the common clock binding: +This binding uses the common clock binding:
+ Documentation/devicetree/bindings/clock/clock-bindings.txt + Documentation/devicetree/bindings/clock/clock-bindings.txt
+ +
+This binding is used for ILP clock (sometimes referred as "slow clock") +This binding is used for ILP clock (sometimes referred as "slow clock")
+on Broadcom Northstar devices using Corex-A7 CPU. +on Broadcom BCM53573 devices using Cortex-A7 CPU.
+ +
+This clock is part of PMU (Power Management Unit), a Broadcom's device +This clock is part of PMU (Power Management Unit), a Broadcom's device
+handing power-related aspects. Please note PMU contains more subdevices, +handing power-related aspects. Please note PMU contains more subdevices,
@ -54,7 +66,7 @@ V3: Drop #include <linux/moduleh>
+which has to be referenced. +which has to be referenced.
+ +
+Required properties: +Required properties:
+- compatible: "brcm,ns-ilp" +- compatible: "brcm,bcm53573-ilp"
+- reg: iomem address range of PMU (Power Management Unit) +- reg: iomem address range of PMU (Power Management Unit)
+- reg-names: "pmu", the only needed & supported reg right now +- reg-names: "pmu", the only needed & supported reg right now
+- clocks: has to reference an ALP clock +- clocks: has to reference an ALP clock
@ -69,7 +81,7 @@ V3: Drop #include <linux/moduleh>
+ #size-cells = <1>; + #size-cells = <1>;
+ +
+ ilp: ilp@0 { + ilp: ilp@0 {
+ compatible = "brcm,ns-ilp"; + compatible = "brcm,bcm53573-ilp";
+ reg = <0 0x1000>; + reg = <0 0x1000>;
+ reg-names = "pmu"; + reg-names = "pmu";
+ clocks = <&alp>; + clocks = <&alp>;
@ -83,10 +95,10 @@ V3: Drop #include <linux/moduleh>
obj-$(CONFIG_ARCH_BCM_CYGNUS) += clk-cygnus.o obj-$(CONFIG_ARCH_BCM_CYGNUS) += clk-cygnus.o
obj-$(CONFIG_ARCH_BCM_NSP) += clk-nsp.o obj-$(CONFIG_ARCH_BCM_NSP) += clk-nsp.o
obj-$(CONFIG_ARCH_BCM_5301X) += clk-nsp.o obj-$(CONFIG_ARCH_BCM_5301X) += clk-nsp.o
+obj-$(CONFIG_ARCH_BCM_5301X) += clk-ns-ilp.o +obj-$(CONFIG_ARCH_BCM_53573) += clk-bcm53573-ilp.o
--- /dev/null --- /dev/null
+++ b/drivers/clk/bcm/clk-ns-ilp.c +++ b/drivers/clk/bcm/clk-bcm53573-ilp.c
@@ -0,0 +1,146 @@ @@ -0,0 +1,157 @@
+/* +/*
+ * Copyright (C) 2016 Rafał Miłecki <rafal@milecki.pl> + * Copyright (C) 2016 Rafał Miłecki <rafal@milecki.pl>
+ * + *
@ -95,7 +107,6 @@ V3: Drop #include <linux/moduleh>
+ * published by the Free Software Foundation. + * published by the Free Software Foundation.
+ */ + */
+ +
+#include <linux/clk.h>
+#include <linux/clk-provider.h> +#include <linux/clk-provider.h>
+#include <linux/err.h> +#include <linux/err.h>
+#include <linux/io.h> +#include <linux/io.h>
@ -108,15 +119,14 @@ V3: Drop #include <linux/moduleh>
+#define XTAL_CTL_EN 0x80000000 +#define XTAL_CTL_EN 0x80000000
+#define PMU_SLOW_CLK_PERIOD 0x6dc +#define PMU_SLOW_CLK_PERIOD 0x6dc
+ +
+struct ns_ilp { +struct bcm53573_ilp {
+ struct clk *clk;
+ struct clk_hw hw; + struct clk_hw hw;
+ void __iomem *pmu; + void __iomem *pmu;
+}; +};
+ +
+static int ns_ilp_enable(struct clk_hw *hw) +static int bcm53573_ilp_enable(struct clk_hw *hw)
+{ +{
+ struct ns_ilp *ilp = container_of(hw, struct ns_ilp, hw); + struct bcm53573_ilp *ilp = container_of(hw, struct bcm53573_ilp, hw);
+ +
+ writel(0x10199, ilp->pmu + PMU_SLOW_CLK_PERIOD); + writel(0x10199, ilp->pmu + PMU_SLOW_CLK_PERIOD);
+ writel(0x10000, ilp->pmu + 0x674); + writel(0x10000, ilp->pmu + 0x674);
@ -124,14 +134,22 @@ V3: Drop #include <linux/moduleh>
+ return 0; + return 0;
+} +}
+ +
+static unsigned long ns_ilp_recalc_rate(struct clk_hw *hw, +static void bcm53573_ilp_disable(struct clk_hw *hw)
+ unsigned long parent_rate)
+{ +{
+ struct ns_ilp *ilp = container_of(hw, struct ns_ilp, hw); + struct bcm53573_ilp *ilp = container_of(hw, struct bcm53573_ilp, hw);
+
+ writel(0, ilp->pmu + PMU_SLOW_CLK_PERIOD);
+ writel(0, ilp->pmu + 0x674);
+}
+
+static unsigned long bcm53573_ilp_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct bcm53573_ilp *ilp = container_of(hw, struct bcm53573_ilp, hw);
+ void __iomem *pmu = ilp->pmu; + void __iomem *pmu = ilp->pmu;
+ u32 last_val, cur_val; + u32 last_val, cur_val;
+ u32 sum = 0, num = 0, loop_num = 0; + int sum = 0, num = 0, loop_num = 0;
+ u32 avg; + int avg;
+ +
+ /* Enable measurement */ + /* Enable measurement */
+ writel(XTAL_CTL_EN, pmu + PMU_XTAL_FREQ_RATIO); + writel(XTAL_CTL_EN, pmu + PMU_XTAL_FREQ_RATIO);
@ -159,6 +177,8 @@ V3: Drop #include <linux/moduleh>
+ num++; + num++;
+ break; + break;
+ } + }
+
+ cpu_relax();
+ } + }
+ +
+ /* Disable measurement to save power */ + /* Disable measurement to save power */
@ -169,14 +189,15 @@ V3: Drop #include <linux/moduleh>
+ return parent_rate * 4 / avg; + return parent_rate * 4 / avg;
+} +}
+ +
+static const struct clk_ops ns_ilp_clk_ops = { +static const struct clk_ops bcm53573_ilp_clk_ops = {
+ .enable = ns_ilp_enable, + .enable = bcm53573_ilp_enable,
+ .recalc_rate = ns_ilp_recalc_rate, + .disable = bcm53573_ilp_disable,
+ .recalc_rate = bcm53573_ilp_recalc_rate,
+}; +};
+ +
+static void ns_ilp_init(struct device_node *np) +static void bcm53573_ilp_init(struct device_node *np)
+{ +{
+ struct ns_ilp *ilp; + struct bcm53573_ilp *ilp;
+ struct resource res; + struct resource res;
+ struct clk_init_data init = { 0 }; + struct clk_init_data init = { 0 };
+ const char *parent_name; + const char *parent_name;
@ -209,27 +230,29 @@ V3: Drop #include <linux/moduleh>
+ } + }
+ +
+ init.name = np->name; + init.name = np->name;
+ init.ops = &ns_ilp_clk_ops; + init.ops = &bcm53573_ilp_clk_ops;
+ init.parent_names = &parent_name; + init.parent_names = &parent_name;
+ init.num_parents = 1; + init.num_parents = 1;
+ +
+ ilp->hw.init = &init; + ilp->hw.init = &init;
+ ilp->clk = clk_register(NULL, &ilp->hw); + err = clk_hw_register(NULL, &ilp->hw);
+ if (WARN_ON(IS_ERR(ilp->clk))) + if (err)
+ goto err_unmap_pmu; + goto err_unmap_pmu;
+ +
+ err = of_clk_add_provider(np, of_clk_src_simple_get, ilp->clk); + err = of_clk_add_hw_provider(np, of_clk_hw_simple_get, &ilp->hw);
+ if (err) + if (err)
+ goto err_clk_unregister; + goto err_clk_hw_unregister;
+ +
+ return; + return;
+ +
+err_clk_unregister: +err_clk_hw_unregister:
+ clk_unregister(ilp->clk); + clk_hw_unregister(&ilp->hw);
+err_unmap_pmu: +err_unmap_pmu:
+ iounmap(ilp->pmu); + iounmap(ilp->pmu);
+err_free_ilp: +err_free_ilp:
+ kfree(ilp); + kfree(ilp);
+ pr_err("Failed to init ILP clock: %d\n", err); + pr_err("Failed to init ILP clock: %d\n", err);
+} +}
+CLK_OF_DECLARE(ns_ilp_clk, "brcm,ns-ilp", ns_ilp_init); +
+/* We need it very early for arch code, before device model gets ready */
+CLK_OF_DECLARE(bcm53573_ilp_clk, "brcm,bcm53573-ilp", bcm53573_ilp_init);

2
target/linux/bcm53xx/patches-4.4/905-BCM53573-minor-hacks.patch
View File

@ -16,7 +16,7 @@ Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
}; };
+ ilp: ilp@0 { + ilp: ilp@0 {
+ compatible = "brcm,ns-ilp"; + compatible = "brcm,bcm53573-ilp";
+ reg = <0x18012000 0x1000>; + reg = <0x18012000 0x1000>;
+ reg-names = "pmu"; + reg-names = "pmu";
+ clocks = <&alp>; + clocks = <&alp>;