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authorÁlvaro Fernández Rojas <noltari@gmail.com>2016-09-10 14:54:26 +0200
committerÁlvaro Fernández Rojas <noltari@gmail.com>2016-09-10 14:54:26 +0200
commit2b1c6b21b5e6c82ebb55d7fb7df90e60e88cbb14 (patch)
treeba6d48b4fec219d07110f5d55afc19bc309d2bdb /target/linux/brcm2708/patches-4.4/0434-clk-bcm2835-Do-appropriate-name-lookups-for-DSI1-s-p.patch
parentac08cb06f6734ebf73ed855cbc836c566f80eaca (diff)
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brcm2708: update linux 4.4 patches to latest version
As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Also adds support for Raspberry Pi Compute Module 3 (untested). Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0434-clk-bcm2835-Do-appropriate-name-lookups-for-DSI1-s-p.patch')
-rw-r--r--target/linux/brcm2708/patches-4.4/0434-clk-bcm2835-Do-appropriate-name-lookups-for-DSI1-s-p.patch125
1 files changed, 125 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0434-clk-bcm2835-Do-appropriate-name-lookups-for-DSI1-s-p.patch b/target/linux/brcm2708/patches-4.4/0434-clk-bcm2835-Do-appropriate-name-lookups-for-DSI1-s-p.patch
new file mode 100644
index 0000000000..ab7eff3cd9
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0434-clk-bcm2835-Do-appropriate-name-lookups-for-DSI1-s-p.patch
@@ -0,0 +1,125 @@
+From b0fde8ea889e47505e4112d89da4be9469a37775 Mon Sep 17 00:00:00 2001
+From: Eric Anholt <eric@anholt.net>
+Date: Thu, 14 Apr 2016 15:13:53 -0700
+Subject: [PATCH] clk: bcm2835: Do appropriate name lookups for DSI1's parents
+ as well.
+
+Signed-off-by: Eric Anholt <eric@anholt.net>
+---
+ .../bindings/clock/brcm,bcm2835-cprman.txt | 12 ++++-
+ drivers/clk/bcm/clk-bcm2835.c | 54 +++++++++++++++++-----
+ 2 files changed, 54 insertions(+), 12 deletions(-)
+
+--- a/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt
++++ b/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt
+@@ -16,7 +16,17 @@ Required properties:
+ - #clock-cells: Should be <1>. The permitted clock-specifier values can be
+ found in include/dt-bindings/clock/bcm2835.h
+ - reg: Specifies base physical address and size of the registers
+-- clocks: The external oscillator clock phandle
++- clocks: phandles to the parent clocks used as input to the module, in
++ the following order:
++
++ - External oscillator
++ - DSI1 byte clock
++ - DSI1 DDR2 clock
++ - DSI1 DDR clock
++
++ Only external oscillator is required. The DSI clocks may
++ not be present, in which case their children will be
++ unusable.
+
+ Example:
+
+--- a/drivers/clk/bcm/clk-bcm2835.c
++++ b/drivers/clk/bcm/clk-bcm2835.c
+@@ -297,11 +297,29 @@
+ #define LOCK_TIMEOUT_NS 100000000
+ #define BCM2835_MAX_FB_RATE 1750000000u
+
++/*
++ * Names of clocks used within the driver that need to be replaced
++ * with an external parent's name. This array is in the order that
++ * the clocks node in the DT references external clocks.
++ */
++static const char *cprman_parent_names[] = {
++ "xosc",
++ "dsi1_byte",
++ "dsi1_ddr2",
++ "dsi1_ddr",
++};
++
+ struct bcm2835_cprman {
+ struct device *dev;
+ void __iomem *regs;
+ spinlock_t regs_lock; /* spinlock for all clocks */
+- const char *osc_name;
++
++ /*
++ * Real names of cprman clock parents looked up through
++ * of_clk_get_parent_name(), which will be used in the
++ * parent_names[] arrays for clock registration.
++ */
++ const char *real_parent_names[ARRAY_SIZE(cprman_parent_names)];
+
+ struct clk_onecell_data onecell;
+ struct clk *clks[];
+@@ -1168,7 +1186,7 @@ static struct clk *bcm2835_register_pll(
+ memset(&init, 0, sizeof(init));
+
+ /* All of the PLLs derive from the external oscillator. */
+- init.parent_names = &cprman->osc_name;
++ init.parent_names = &cprman->real_parent_names[0];
+ init.num_parents = 1;
+ init.name = data->name;
+ init.ops = &bcm2835_pll_clk_ops;
+@@ -1251,17 +1269,21 @@ static struct clk *bcm2835_register_cloc
+ struct bcm2835_clock *clock;
+ struct clk_init_data init;
+ const char *parents[1 << CM_SRC_BITS];
+- size_t i;
++ size_t i, j;
+
+ /*
+- * Replace our "xosc" references with the oscillator's
+- * actual name.
++ * Replace our strings referencing parent clocks with the
++ * actual clock-output-name of the parent.
+ */
+ for (i = 0; i < data->num_mux_parents; i++) {
+- if (strcmp(data->parents[i], "xosc") == 0)
+- parents[i] = cprman->osc_name;
+- else
+- parents[i] = data->parents[i];
++ parents[i] = data->parents[i];
++
++ for (j = 0; j < ARRAY_SIZE(cprman_parent_names); j++) {
++ if (strcmp(parents[i], cprman_parent_names[j]) == 0) {
++ parents[i] = cprman->real_parent_names[j];
++ break;
++ }
++ }
+ }
+
+ memset(&init, 0, sizeof(init));
+@@ -1883,8 +1905,18 @@ static int bcm2835_clk_probe(struct plat
+ if (IS_ERR(cprman->regs))
+ return PTR_ERR(cprman->regs);
+
+- cprman->osc_name = of_clk_get_parent_name(dev->of_node, 0);
+- if (!cprman->osc_name)
++ for (i = 0; i < ARRAY_SIZE(cprman_parent_names); i++) {
++ cprman->real_parent_names[i] =
++ of_clk_get_parent_name(dev->of_node, i);
++ }
++ /*
++ * Make sure the external oscillator has been registered.
++ *
++ * The other (DSI) clocks are not present on older device
++ * trees, which we still need to support for backwards
++ * compatibility.
++ */
++ if (!cprman->real_parent_names[0])
+ return -ENODEV;
+
+ platform_set_drvdata(pdev, cprman);