linux-kernel - [PATCH v5 04/44] clk: davinci: Add platform information for TI DA850 PLL

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Date:   Sun,  7 Jan 2018 20:17:03 -0600
From:   David Lechner <david@...hnology.com>
To:     linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Sekhar Nori <nsekhar@...com>,
        Kevin Hilman <khilman@...nel.org>,
        Adam Ford <aford173@...il.com>, linux-kernel@...r.kernel.org,
        David Lechner <david@...hnology.com>
Subject: [PATCH v5 04/44] clk: davinci: Add platform information for TI DA850 PLL

This adds platform-specific declarations for the PLL clocks on TI DA850/
OMAP-L138/AM18XX SoCs.

Signed-off-by: David Lechner <david@...hnology.com>
---
 drivers/clk/davinci/Makefile    |  1 +
 drivers/clk/davinci/pll-da850.c | 67 +++++++++++++++++++++++++++++++++++++++++
 include/linux/clk/davinci.h     |  1 +
 3 files changed, 69 insertions(+)
 create mode 100644 drivers/clk/davinci/pll-da850.c

diff --git a/drivers/clk/davinci/Makefile b/drivers/clk/davinci/Makefile
index 9061e19..13049d4 100644
--- a/drivers/clk/davinci/Makefile
+++ b/drivers/clk/davinci/Makefile
@@ -3,4 +3,5 @@
 ifeq ($(CONFIG_COMMON_CLK), y)
 obj-y += pll.o
 obj-$(CONFIG_ARCH_DAVINCI_DA830)	+= pll-da830.o
+obj-$(CONFIG_ARCH_DAVINCI_DA850)	+= pll-da850.o
 endif
diff --git a/drivers/clk/davinci/pll-da850.c b/drivers/clk/davinci/pll-da850.c
new file mode 100644
index 0000000..2f00f3d
--- /dev/null
+++ b/drivers/clk/davinci/pll-da850.c
@@ -0,0 +1,67 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PLL clock descriptions for TI DA850/OMAP-L138/AM18XX
+ *
+ * Copyright (C) 2017 David Lechner <david@...hnology.com>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
+#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/types.h>
+
+#include "pll.h"
+
+/*
+ * NB: Technically, the clocks flagged as DIVCLK_FIXED_DIV are "fixed ratio",
+ * meaning that we could change the divider as long as we keep the correct
+ * ratio between all of the clocks, but we don't support that because there is
+ * currently not a need for it.
+ */
+
+static const struct davinci_pll_divclk_info da850_pll0_divclk_info[] __initconst = {
+	DIVCLK(1, pll0_sysclk1, pll0, DIVCLK_FIXED_DIV),
+	DIVCLK(2, pll0_sysclk2, pll0, DIVCLK_FIXED_DIV),
+	DIVCLK(3, pll0_sysclk3, pll0, 0),
+	DIVCLK(4, pll0_sysclk4, pll0, DIVCLK_FIXED_DIV),
+	DIVCLK(5, pll0_sysclk5, pll0, 0),
+	DIVCLK(6, pll0_sysclk6, pll0, DIVCLK_ARM_RATE | DIVCLK_FIXED_DIV),
+	DIVCLK(7, pll0_sysclk7, pll0, 0),
+	{ }
+};
+
+static const struct davinci_pll_divclk_info da850_pll1_divclk_info[] __initconst = {
+	DIVCLK(1, pll1_sysclk1, pll1, DIVCLK_ALWAYS_ENABLED),
+	DIVCLK(2, pll1_sysclk2, pll1, 0),
+	DIVCLK(3, pll1_sysclk3, pll1, 0),
+	{ }
+};
+
+void __init da850_pll_clk_init(void __iomem *pll0, void __iomem *pll1)
+{
+	const struct davinci_pll_divclk_info *info;
+
+	davinci_pll_clk_register("pll0", "ref_clk", pll0);
+	davinci_pll_aux_clk_register("pll0_aux_clk", "ref_clk", pll0);
+	for (info = da850_pll0_divclk_info; info->name; info++)
+		davinci_pll_divclk_register(info, pll0);
+
+	davinci_pll_clk_register("pll1", "ref_clk", pll1);
+	for (info = da850_pll1_divclk_info; info->name; info++)
+		davinci_pll_divclk_register(info, pll1);
+}
+
+#ifdef CONFIG_OF
+static void __init of_da850_pll0_auxclk_init(struct device_node *node)
+{
+	of_davinci_pll_init(node, "pll0", da850_pll0_divclk_info, 7);
+}
+CLK_OF_DECLARE(da850_pll0_auxclk, "ti,da850-pll0", of_da850_pll0_auxclk_init);
+
+static void __init of_da850_pll1_auxclk_init(struct device_node *node)
+{
+	of_davinci_pll_init(node, "pll1", da850_pll1_divclk_info, 3);
+}
+CLK_OF_DECLARE(da850_pll1_auxclk, "ti,da850-pll1", of_da850_pll1_auxclk_init);
+#endif
diff --git a/include/linux/clk/davinci.h b/include/linux/clk/davinci.h
index 4f4d60d..7b08fe0 100644
--- a/include/linux/clk/davinci.h
+++ b/include/linux/clk/davinci.h
@@ -10,5 +10,6 @@
 #include <linux/types.h>
 
 void da830_pll_clk_init(void __iomem *pll);
+void da850_pll_clk_init(void __iomem *pll0, void __iomem *pll1);
 
 #endif /* __LINUX_CLK_DAVINCI_H__ */
-- 
2.7.4