[openwrt/openwrt] bcm53xx: backport clk driver fix for DT nodes names
LEDE Commits
lede-commits at lists.infradead.org
Mon Oct 3 01:06:41 PDT 2022
rmilecki pushed a commit to openwrt/openwrt.git, branch openwrt-22.03:
https://git.openwrt.org/cd117f0596e01e1ced3dbdb046216cd7807bf6fb
commit cd117f0596e01e1ced3dbdb046216cd7807bf6fb
Author: Rafał Miłecki <rafal at milecki.pl>
AuthorDate: Thu Sep 29 05:51:25 2022 +0200
bcm53xx: backport clk driver fix for DT nodes names
It allows dropping downstream patch renaming DT nodes.
Signed-off-by: Rafał Miłecki <rafal at milecki.pl>
(cherry picked from commit 77d9cce604d32005ddb90e91c6cc9b9cf35068d7)
---
...o-not-rely-on-node-name-for-correct-PLL-s.patch | 72 ++++++++++++++++++++++
...5301X-Switch-back-to-old-clock-nodes-name.patch | 62 -------------------
2 files changed, 72 insertions(+), 62 deletions(-)
diff --git a/target/linux/bcm53xx/patches-5.10/083-v6.0-clk-iproc-Do-not-rely-on-node-name-for-correct-PLL-s.patch b/target/linux/bcm53xx/patches-5.10/083-v6.0-clk-iproc-Do-not-rely-on-node-name-for-correct-PLL-s.patch
new file mode 100644
index 0000000000..12c60ce297
--- /dev/null
+++ b/target/linux/bcm53xx/patches-5.10/083-v6.0-clk-iproc-Do-not-rely-on-node-name-for-correct-PLL-s.patch
@@ -0,0 +1,72 @@
+From 1b24a132eba7a1c19475ba2510ec1c00af3ff914 Mon Sep 17 00:00:00 2001
+From: Florian Fainelli <f.fainelli at gmail.com>
+Date: Mon, 5 Sep 2022 09:15:03 -0700
+Subject: [PATCH] clk: iproc: Do not rely on node name for correct PLL setup
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+After commit 31fd9b79dc58 ("ARM: dts: BCM5301X: update CRU block
+description") a warning from clk-iproc-pll.c was generated due to a
+duplicate PLL name as well as the console stopped working. Upon closer
+inspection it became clear that iproc_pll_clk_setup() used the Device
+Tree node unit name as an unique identifier as well as a parent name to
+parent all clocks under the PLL.
+
+BCM5301X was the first platform on which that got noticed because of the
+DT node unit name renaming but the same assumptions hold true for any
+user of the iproc_pll_clk_setup() function.
+
+The first 'clock-output-names' property is always guaranteed to be
+unique as well as providing the actual desired PLL clock name, so we
+utilize that to register the PLL and as a parent name of all children
+clock.
+
+Fixes: 5fe225c105fd ("clk: iproc: add initial common clock support")
+Signed-off-by: Florian Fainelli <f.fainelli at gmail.com>
+Acked-by: Rafał Miłecki <rafal at milecki.pl>
+Link: https://lore.kernel.org/r/20220905161504.1526-1-f.fainelli@gmail.com
+Signed-off-by: Stephen Boyd <sboyd at kernel.org>
+---
+ drivers/clk/bcm/clk-iproc-pll.c | 12 ++++++++----
+ 1 file changed, 8 insertions(+), 4 deletions(-)
+
+--- a/drivers/clk/bcm/clk-iproc-pll.c
++++ b/drivers/clk/bcm/clk-iproc-pll.c
+@@ -736,6 +736,7 @@ void iproc_pll_clk_setup(struct device_n
+ const char *parent_name;
+ struct iproc_clk *iclk_array;
+ struct clk_hw_onecell_data *clk_data;
++ const char *clk_name;
+
+ if (WARN_ON(!pll_ctrl) || WARN_ON(!clk_ctrl))
+ return;
+@@ -783,7 +784,12 @@ void iproc_pll_clk_setup(struct device_n
+ iclk = &iclk_array[0];
+ iclk->pll = pll;
+
+- init.name = node->name;
++ ret = of_property_read_string_index(node, "clock-output-names",
++ 0, &clk_name);
++ if (WARN_ON(ret))
++ goto err_pll_register;
++
++ init.name = clk_name;
+ init.ops = &iproc_pll_ops;
+ init.flags = 0;
+ parent_name = of_clk_get_parent_name(node, 0);
+@@ -803,13 +809,11 @@ void iproc_pll_clk_setup(struct device_n
+ goto err_pll_register;
+
+ clk_data->hws[0] = &iclk->hw;
++ parent_name = clk_name;
+
+ /* now initialize and register all leaf clocks */
+ for (i = 1; i < num_clks; i++) {
+- const char *clk_name;
+-
+ memset(&init, 0, sizeof(init));
+- parent_name = node->name;
+
+ ret = of_property_read_string_index(node, "clock-output-names",
+ i, &clk_name);
diff --git a/target/linux/bcm53xx/patches-5.10/320-ARM-dts-BCM5301X-Switch-back-to-old-clock-nodes-name.patch b/target/linux/bcm53xx/patches-5.10/320-ARM-dts-BCM5301X-Switch-back-to-old-clock-nodes-name.patch
deleted file mode 100644
index cee37732ab..0000000000
--- a/target/linux/bcm53xx/patches-5.10/320-ARM-dts-BCM5301X-Switch-back-to-old-clock-nodes-name.patch
+++ /dev/null
@@ -1,62 +0,0 @@
-From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal at milecki.pl>
-Date: Tue, 23 Nov 2021 13:13:05 +0100
-Subject: [PATCH] ARM: dts: BCM5301X: Switch back to old clock nodes names
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-First of all using the same node name prefix resulted in trying to
-register 2 clocks under the same "clock-controller" name:
-
-[ 0.000000] __clk_core_init: clk clock-controller already initialized
-[ 0.000000] ------------[ cut here ]------------
-[ 0.000000] WARNING: CPU: 0 PID: 0 at drivers/clk/bcm/clk-iproc-pll.c:802 iproc_pll_clk_setup+0x4c8/0x4f4
-[ 0.000000] Modules linked in:
-[ 0.000000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.80 #0
-[ 0.000000] Hardware name: BCM5301X
-[ 0.000000] [<c0108410>] (unwind_backtrace) from [<c0104bc4>] (show_stack+0x10/0x14)
-[ 0.000000] [<c0104bc4>] (show_stack) from [<c03dca28>] (dump_stack+0x94/0xa8)
-[ 0.000000] [<c03dca28>] (dump_stack) from [<c0118440>] (__warn+0xb8/0x114)
-[ 0.000000] [<c0118440>] (__warn) from [<c0118504>] (warn_slowpath_fmt+0x68/0x78)
-[ 0.000000] [<c0118504>] (warn_slowpath_fmt) from [<c043281c>] (iproc_pll_clk_setup+0x4c8/0x4f4)
-[ 0.000000] [<c043281c>] (iproc_pll_clk_setup) from [<c0818c04>] (nsp_genpll_clk_init+0x30/0x38)
-[ 0.000000] [<c0818c04>] (nsp_genpll_clk_init) from [<c0818634>] (of_clk_init+0x118/0x1f8)
-[ 0.000000] [<c0818634>] (of_clk_init) from [<c08039b0>] (time_init+0x24/0x30)
-[ 0.000000] [<c08039b0>] (time_init) from [<c0800d14>] (start_kernel+0x398/0x50c)
-[ 0.000000] [<c0800d14>] (start_kernel) from [<00000000>] (0x0)
-[ 0.000000] ---[ end trace fe236bfe9559ee50 ]---
-
-Secondly using any other names than "lcpll0" and "genpll" breaks output
-clocks:
-
-$ cat /sys/kernel/debug/clk/usbclk/clk_rate
-0
-
-For some reason iproc_clk_recalc_rate() gets called with "parent_rate"
-argument 0 whenever clocks aren't named "lcpll0" and "genpll".
-
-Signed-off-by: Rafał Miłecki <rafal at milecki.pl>
----
- arch/arm/boot/dts/bcm5301x.dtsi | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
-
---- a/arch/arm/boot/dts/bcm5301x.dtsi
-+++ b/arch/arm/boot/dts/bcm5301x.dtsi
-@@ -421,7 +421,7 @@
- #address-cells = <1>;
- #size-cells = <1>;
-
-- lcpll0: clock-controller at 100 {
-+ lcpll0: lcpll0 at 100 {
- #clock-cells = <1>;
- compatible = "brcm,nsp-lcpll0";
- reg = <0x100 0x14>;
-@@ -430,7 +430,7 @@
- "sdio", "ddr_phy";
- };
-
-- genpll: clock-controller at 140 {
-+ genpll: genpll at 140 {
- #clock-cells = <1>;
- compatible = "brcm,nsp-genpll";
- reg = <0x140 0x24>;
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