[PATCH 02/12] clk: imx: scu: add scu clock common part

[Dong Aisheng]

Add scu clock common part which will be used by client clock drivers.

Cc: Shawn Guo <shawnguo at kernel.org>
Cc: Sascha Hauer <kernel at pengutronix.de>
Cc: Fabio Estevam <fabio.estevam at nxp.com>
Cc: Stephen Boyd <sboyd at kernel.org>
Cc: Michael Turquette <mturquette at baylibre.com>
Signed-off-by: Dong Aisheng <aisheng.dong at nxp.com>
---
 drivers/clk/imx/Kconfig       |  2 ++
 drivers/clk/imx/Makefile      |  2 ++
 drivers/clk/imx/scu/Kconfig   |  5 +++++
 drivers/clk/imx/scu/Makefile  |  4 ++++
 drivers/clk/imx/scu/clk-scu.c | 25 +++++++++++++++++++++++++
 drivers/clk/imx/scu/clk-scu.h | 18 ++++++++++++++++++
 6 files changed, 56 insertions(+)
 create mode 100644 drivers/clk/imx/scu/Kconfig
 create mode 100644 drivers/clk/imx/scu/Makefile
 create mode 100644 drivers/clk/imx/scu/clk-scu.c
 create mode 100644 drivers/clk/imx/scu/clk-scu.h

diff --git a/drivers/clk/imx/Kconfig b/drivers/clk/imx/Kconfig
index 43a3ecc..b1599bf 100644
--- a/drivers/clk/imx/Kconfig
+++ b/drivers/clk/imx/Kconfig
@@ -3,3 +3,5 @@
 config MXC_CLK
 	bool
 	depends on ARCH_MXC
+
+source drivers/clk/imx/scu/Kconfig
diff --git a/drivers/clk/imx/Makefile b/drivers/clk/imx/Makefile
index d447f8c..79b641a 100644
--- a/drivers/clk/imx/Makefile
+++ b/drivers/clk/imx/Makefile
@@ -13,6 +13,8 @@ obj-$(CONFIG_MXC_CLK) += \
 	clk-pllv3.o \
 	clk-pfd.o
 
+obj-y += scu/
+
 obj-$(CONFIG_SOC_IMX1)   += clk-imx1.o
 obj-$(CONFIG_SOC_IMX21)  += clk-imx21.o
 obj-$(CONFIG_SOC_IMX25)  += clk-imx25.o
diff --git a/drivers/clk/imx/scu/Kconfig b/drivers/clk/imx/scu/Kconfig
new file mode 100644
index 0000000..4d018fd
--- /dev/null
+++ b/drivers/clk/imx/scu/Kconfig
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0
+# SCU based common clock support for NXP i.MX SoC family.
+config MXC_CLK_SCU
+	bool
+	depends on ARCH_MXC && ARM64
diff --git a/drivers/clk/imx/scu/Makefile b/drivers/clk/imx/scu/Makefile
new file mode 100644
index 0000000..7dead13
--- /dev/null
+++ b/drivers/clk/imx/scu/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_MXC_CLK_SCU) += \
+	clk-scu.o
diff --git a/drivers/clk/imx/scu/clk-scu.c b/drivers/clk/imx/scu/clk-scu.c
new file mode 100644
index 0000000..c19cd38
--- /dev/null
+++ b/drivers/clk/imx/scu/clk-scu.c
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2016 Freescale Semiconductor, Inc.
+ * Copyright 2017~2018 NXP
+ *	Dong Aisheng <aisheng.dong at nxp.com>
+ */
+
+#include <linux/errno.h>
+#include "clk-scu.h"
+
+DEFINE_SPINLOCK(imx_ccm_lock);
+sc_ipc_t ccm_ipc_handle;
+
+int imx_clk_scu_init(void)
+{
+	sc_err_t sci_err;
+
+	sci_err = sc_ipc_get_handle(&ccm_ipc_handle);
+	if (sci_err != SC_ERR_NONE) {
+		pr_err("imx_clk_scu: failed to get sc ipc handle\n");
+		return -EPROBE_DEFER;
+	}
+
+	return 0;
+}
diff --git a/drivers/clk/imx/scu/clk-scu.h b/drivers/clk/imx/scu/clk-scu.h
new file mode 100644
index 0000000..6b39e4a
--- /dev/null
+++ b/drivers/clk/imx/scu/clk-scu.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2016 Freescale Semiconductor, Inc.
+ * Copyright 2017~2018 NXP
+ */
+
+#ifndef __IMX_CLK_SCU_H
+#define __IMX_CLK_SCU_H
+
+#include <linux/spinlock.h>
+#include <soc/imx/sc/sci.h>
+
+extern spinlock_t imx_ccm_lock;
+extern sc_ipc_t ccm_ipc_handle;
+
+int imx_clk_scu_init(void);
+
+#endif
-- 
2.7.4