diff options
Diffstat (limited to 'target/linux/ipq806x/patches-5.15/117-v6.0-03-clk-qcom-clk-krait-add-apq-ipq8064-errata-workaround.patch')
| -rw-r--r-- | target/linux/ipq806x/patches-5.15/117-v6.0-03-clk-qcom-clk-krait-add-apq-ipq8064-errata-workaround.patch | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches-5.15/117-v6.0-03-clk-qcom-clk-krait-add-apq-ipq8064-errata-workaround.patch b/target/linux/ipq806x/patches-5.15/117-v6.0-03-clk-qcom-clk-krait-add-apq-ipq8064-errata-workaround.patch new file mode 100644 index 0000000000..4012e16f9b --- /dev/null +++ b/target/linux/ipq806x/patches-5.15/117-v6.0-03-clk-qcom-clk-krait-add-apq-ipq8064-errata-workaround.patch @@ -0,0 +1,86 @@ +From 898d0d6483a9360f1968e0a900465c1fa152a4a9 Mon Sep 17 00:00:00 2001 +From: Ansuel Smith <ansuelsmth@gmail.com> +Date: Sat, 30 Apr 2022 07:44:58 +0200 +Subject: [PATCH 3/3] clk: qcom: clk-krait: add apq/ipq8064 errata workaround + +Add apq/ipq8064 errata workaround where the sec_src clock gating needs to +be disabled during switching. krait-cc compatible is not enough to +handle this and limit this workaround to apq/ipq8064. We check machine +compatible to handle this. + +Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com> +Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> +Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> +Link: https://lore.kernel.org/r/20220430054458.31321-4-ansuelsmth@gmail.com +--- + drivers/clk/qcom/clk-krait.c | 16 ++++++++++++++++ + drivers/clk/qcom/clk-krait.h | 1 + + drivers/clk/qcom/krait-cc.c | 8 ++++++++ + 3 files changed, 25 insertions(+) + +--- a/drivers/clk/qcom/clk-krait.c ++++ b/drivers/clk/qcom/clk-krait.c +@@ -18,13 +18,23 @@ + static DEFINE_SPINLOCK(krait_clock_reg_lock); + + #define LPL_SHIFT 8 ++#define SECCLKAGD BIT(4) ++ + static void __krait_mux_set_sel(struct krait_mux_clk *mux, int sel) + { + unsigned long flags; + u32 regval; + + spin_lock_irqsave(&krait_clock_reg_lock, flags); ++ + regval = krait_get_l2_indirect_reg(mux->offset); ++ ++ /* apq/ipq8064 Errata: disable sec_src clock gating during switch. */ ++ if (mux->disable_sec_src_gating) { ++ regval |= SECCLKAGD; ++ krait_set_l2_indirect_reg(mux->offset, regval); ++ } ++ + regval &= ~(mux->mask << mux->shift); + regval |= (sel & mux->mask) << mux->shift; + if (mux->lpl) { +@@ -33,6 +43,12 @@ static void __krait_mux_set_sel(struct k + } + krait_set_l2_indirect_reg(mux->offset, regval); + ++ /* apq/ipq8064 Errata: re-enabled sec_src clock gating. */ ++ if (mux->disable_sec_src_gating) { ++ regval &= ~SECCLKAGD; ++ krait_set_l2_indirect_reg(mux->offset, regval); ++ } ++ + /* Wait for switch to complete. */ + mb(); + udelay(1); +--- a/drivers/clk/qcom/clk-krait.h ++++ b/drivers/clk/qcom/clk-krait.h +@@ -15,6 +15,7 @@ struct krait_mux_clk { + u8 safe_sel; + u8 old_index; + bool reparent; ++ bool disable_sec_src_gating; + + struct clk_hw hw; + struct notifier_block clk_nb; +--- a/drivers/clk/qcom/krait-cc.c ++++ b/drivers/clk/qcom/krait-cc.c +@@ -139,6 +139,14 @@ krait_add_sec_mux(struct device *dev, in + mux->hw.init = &init; + mux->safe_sel = 0; + ++ /* Checking for qcom,krait-cc-v1 or qcom,krait-cc-v2 is not ++ * enough to limit this to apq/ipq8064. Directly check machine ++ * compatible to correctly handle this errata. ++ */ ++ if (of_machine_is_compatible("qcom,ipq8064") || ++ of_machine_is_compatible("qcom,apq8064")) ++ mux->disable_sec_src_gating = true; ++ + init.name = kasprintf(GFP_KERNEL, "krait%s_sec_mux", s); + if (!init.name) + return -ENOMEM; |