From mboxrd@z Thu Jan 1 00:00:00 1970 From: david@lechnology.com (David Lechner) Date: Sat, 20 Jan 2018 11:13:42 -0600 Subject: [PATCH v6 03/41] clk: davinci: Add platform information for TI DA830 PLL In-Reply-To: <1516468460-4908-1-git-send-email-david@lechnology.com> References: <1516468460-4908-1-git-send-email-david@lechnology.com> Message-ID: <1516468460-4908-4-git-send-email-david@lechnology.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org This adds platform-specific declarations for the PLL clocks on TI DA830/ OMAP-L137/AM17XX SoCs. Signed-off-by: David Lechner --- 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 + */ + +#include +#include +#include + +#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 + */ +#ifndef __LINUX_CLK_DAVINCI_H__ +#define __LINUX_CLK_DAVINCI_H__ + +#include + +void da830_pll_clk_init(void __iomem *pll); + +#endif /* __LINUX_CLK_DAVINCI_H__ */ -- 2.7.4