[v6,03/41] clk: davinci: Add platform information for TI DA830 PLL

Commit Message

David Lechner Jan. 20, 2018, 5:13 p.m. UTC

This adds platform-specific declarations for the PLL clocks on TI DA830/
OMAP-L137/AM17XX SoCs.

Signed-off-by: David Lechner <[e-mail]>
---

v6 changes:
- Added da830_pll_info with controller-specific information
- Add empty lines between function calls

 drivers/clk/davinci/Makefile    |  1 +
 drivers/clk/davinci/pll-da830.c | 51 +++++++++++++++++++++++++++++++++++++++++
 include/linux/clk/davinci.h     | 14 +++++++++++
 3 files changed, 66 insertions(+)
 create mode 100644 drivers/clk/davinci/pll-da830.c
 create mode 100644 include/linux/clk/davinci.h

Comments

Sekhar Nori Feb. 1, 2018, 8:10 a.m. UTC | #1

On Saturday 20 January 2018 10:43 PM, David Lechner wrote:
> This adds platform-specific declarations for the PLL clocks on TI DA830/
> OMAP-L137/AM17XX SoCs.
> 
> Signed-off-by: David Lechner <[e-mail]>

Reviewed-by: Sekhar Nori <[e-mail]>

Thanks,
Sekhar

Patch

diff --git a/drivers/clk/davinci/Makefile b/drivers/clk/davinci/Makefile
index d9673bd..9061e19 100644
--- a/drivers/clk/davinci/Makefile
+++ b/drivers/clk/davinci/Makefile
@@ -2,4 +2,5 @@ 
 
 ifeq ($(CONFIG_COMMON_CLK), y)
 obj-y += pll.o
+obj-$(CONFIG_ARCH_DAVINCI_DA830)	+= pll-da830.o
 endif
diff --git a/drivers/clk/davinci/pll-da830.c b/drivers/clk/davinci/pll-da830.c
new file mode 100644
index 0000000..548eb73
--- /dev/null
+++ b/drivers/clk/davinci/pll-da830.c
@@ -0,0 +1,51 @@ 
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PLL clock descriptions for TI DA830/OMAP-L137/AM17XX
+ *
+ * Copyright (C) 2018 David Lechner <[e-mail]>
+ */
+
+#include <linux/bitops.h>
+#include <linux/init.h>
+#include <linux/types.h>
+
+#include "pll.h"
+
+static const struct davinci_pll_clk_info da830_pll_info __initconst = {
+	.name = "pll0",
+	.pllm_mask = GENMASK(4, 0),
+	.pllm_min = 4,
+	.pllm_max = 32,
+	.pllout_min_rate = 300000000,
+	.pllout_max_rate = 600000000,
+	.flags = PLL_HAS_OSCIN | PLL_HAS_PREDIV | PLL_HAS_POSTDIV,
+};
+
+/*
+ * NB: Technically, the clocks flagged as SYSCLK_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_sysclk_info da830_pll_sysclk_info[] __initconst = {
+	SYSCLK(2, pll0_sysclk2, pll0_pllen, 5, SYSCLK_FIXED_DIV),
+	SYSCLK(3, pll0_sysclk3, pll0_pllen, 5, 0),
+	SYSCLK(4, pll0_sysclk4, pll0_pllen, 5, SYSCLK_FIXED_DIV),
+	SYSCLK(5, pll0_sysclk5, pll0_pllen, 5, 0),
+	SYSCLK(6, pll0_sysclk6, pll0_pllen, 5, SYSCLK_FIXED_DIV),
+	SYSCLK(7, pll0_sysclk7, pll0_pllen, 5, 0),
+	{ }
+};
+
+void __init da830_pll_clk_init(void __iomem *pll)
+{
+	const struct davinci_pll_sysclk_info *info;
+
+	davinci_pll_clk_register(&da830_pll_info, "ref_clk", pll);
+
+	davinci_pll_auxclk_register("pll0_auxclk", pll);
+
+	for (info = da830_pll_sysclk_info; info->name; info++)
+		davinci_pll_sysclk_register(info, pll);
+}
diff --git a/include/linux/clk/davinci.h b/include/linux/clk/davinci.h
new file mode 100644
index 0000000..4f4d60d
--- /dev/null
+++ b/include/linux/clk/davinci.h
@@ -0,0 +1,14 @@ 
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * TI Davinci clocks
+ *
+ * Copyright (C) 2017 David Lechner <[e-mail]>
+ */
+#ifndef __LINUX_CLK_DAVINCI_H__
+#define __LINUX_CLK_DAVINCI_H__
+
+#include <linux/types.h>
+
+void da830_pll_clk_init(void __iomem *pll);
+
+#endif /* __LINUX_CLK_DAVINCI_H__ */