-----Original Message-----
From: Stephen Boyd <sboyd@kernel.org>
Sent: Monday, March 19, 2018 19:45
To: Ilia Lin <redacted>; linux-arm-kernel at lists.infradead.org;
linux-arm-msm at vger.kernel.org; linux-clk at vger.kernel.org;
sboyd at codeaurora.org
Cc: mark.rutland at arm.com; devicetree at vger.kernel.org;
rnayak at codeaurora.org; robh at kernel.org; will.deacon at arm.com;
amit.kucheria at linaro.org; tfinkel at codeaurora.org; ilialin at codeaurora.org;
nicolas.dechesne at linaro.org; celster at codeaurora.org
Subject: Re: [PATCH v3 01/10] soc: qcom: Separate kryo l2 accessors from
PMU driver

Quoting Ilia Lin (2018-02-14 05:59:43)

quoted

diff --git a/arch/arm64/Kconfig.platforms

b/arch/arm64/Kconfig.platforms index fbedbd8..78a103b 100644

--- a/arch/arm64/Kconfig.platforms
+++ b/arch/arm64/Kconfig.platforms

@@ -145,6 +145,13 @@ config ARCH_REALTEK
          This enables support for the ARMv8 based Realtek chipsets,
          like the RTD1295.

+config ARCH_MSM8996
+    bool "Enable Support for Qualcomm Technologies, Inc. MSM8996"
+       depends on ARCH_QCOM

Is this really the proposed approach? Doesn't the PMU code use these
accessors? I would think the accessors are compiled if ARCH_QCOM=y so
that the PMU stuff keeps working. Drop this Kconfig addition?

I'll check whether the kryo-accessors code is SOC specific or not.

quoted

+       help
+       This enables support for the MSM8996 chipset. If you do not
+       wish to build a kernel that runs on this chipset, say 'N' here.
+
 config ARCH_ROCKCHIP
        bool "Rockchip Platforms"
        select ARCH_HAS_RESET_CONTROLLER diff --git
a/drivers/perf/qcom_l2_pmu.c b/drivers/perf/qcom_l2_pmu.c index
4fdc848..8cece9e 100644

--- a/drivers/perf/qcom_l2_pmu.c
+++ b/drivers/perf/qcom_l2_pmu.c

@@ -1,4 +1,4 @@
-/* Copyright (c) 2015-2017 The Linux Foundation. All rights reserved.
+/* Copyright (c) 2015-2018 The Linux Foundation. All rights reserved.

Sorry, this makes little sense. First off, code is only being deleted and more
than half the file isn't being modified so why update copyright dates?

Agree. Will roll back.

quoted

  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and

diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile
index dcebf28..4e91e2a 100644
--- a/drivers/soc/qcom/Makefile
+++ b/drivers/soc/qcom/Makefile

@@ -12,3 +12,4 @@ obj-$(CONFIG_QCOM_SMEM_STATE) +=

smem_state.o

quoted

 obj-$(CONFIG_QCOM_SMP2P)       += smp2p.o
 obj-$(CONFIG_QCOM_SMSM)        += smsm.o
 obj-$(CONFIG_QCOM_WCNSS_CTRL) += wcnss_ctrl.o
+obj-$(CONFIG_ARCH_MSM8996) +=  kryo-l2-accessors.o

diff --git a/drivers/soc/qcom/kryo-l2-accessors.c

b/drivers/soc/qcom/kryo-l2-accessors.c
new file mode 100644
index 0000000..6743848

--- /dev/null
+++ b/drivers/soc/qcom/kryo-l2-accessors.c

@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2014-2015, 2018, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */

SPDX tags?

Will do.

quoted

diff --git a/include/soc/qcom/kryo-l2-accessors.h

b/include/soc/qcom/kryo-l2-accessors.h
new file mode 100644
index 0000000..e9a5eab

--- /dev/null
+++ b/include/soc/qcom/kryo-l2-accessors.h

@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __ASM_ARCH_MSM_MSM_KRYO_L2_ACCESSORS_H
+#define __ASM_ARCH_MSM_MSM_KRYO_L2_ACCESSORS_H

Maybe change this tO __SOC_ARCH_QCOM_KRYO_L2_ACCESSORS_H

No problem. Will change.

quoted

+
+#ifdef CONFIG_ARCH_QCOM
+void set_l2_indirect_reg(u64 reg_addr, u64 val);
+u64 get_l2_indirect_reg(u64 reg_addr); #endif

This ifdef isn't doing much. Drop it? Or provide the inline nop alternatives.

Right. I'll drop it.