diff options
Diffstat (limited to 'target')
| -rw-r--r-- | target/linux/bcm53xx/patches-5.4/083-v6.0-clk-iproc-Do-not-rely-on-node-name-for-correct-PLL-s.patch | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/target/linux/bcm53xx/patches-5.4/083-v6.0-clk-iproc-Do-not-rely-on-node-name-for-correct-PLL-s.patch b/target/linux/bcm53xx/patches-5.4/083-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-5.4/083-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); |