[PATCH v6 03/41] clk: davinci: Add platform information for TI DA830 PLL
STALE3160d
From: david@lechnology.com (David Lechner)
Date: 2018-01-20 17:15:40
Also in:
linux-clk, linux-devicetree, lkml
Subsystem:
common clk framework, the rest, ti davinci series clock driver · Maintainers:
Stephen Boyd, Brian Masney, Jerome Brunet, Linus Torvalds, David Lechner
Revision v6 of 8 in this series.
Revisions (8)
This adds platform-specific declarations for the PLL clocks on TI DA830/ OMAP-L137/AM17XX SoCs. Signed-off-by: David Lechner <david@lechnology.com> --- 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
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 <david@lechnology.com> + */ + +#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 <david@lechnology.com> + */ +#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__ */
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2.7.4