bcm53xx: backport clk driver fix for DT nodes names

It allows dropping downstream patch renaming DT nodes.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit 77d9cce604d32005ddb90e91c6cc9b9cf35068d7)

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 (file)
index 0000000..12c60ce
--- /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@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@gmail.com>
+Acked-by: Rafał Miłecki <rafal@milecki.pl>
+Link: https://lore.kernel.org/r/20220905161504.1526-1-f.fainelli@gmail.com
+Signed-off-by: Stephen Boyd <sboyd@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 (file)
index cee3773..0000000
--- 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@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@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@100 {
-+                      lcpll0: lcpll0@100 {
-                               #clock-cells = <1>;
-                               compatible = "brcm,nsp-lcpll0";
-                               reg = <0x100 0x14>;
-@@ -430,7 +430,7 @@
-                                                    "sdio", "ddr_phy";
-                       };
- 
--                      genpll: clock-controller@140 {
-+                      genpll: genpll@140 {
-                               #clock-cells = <1>;
-                               compatible = "brcm,nsp-genpll";
-                               reg = <0x140 0x24>;