This adds platform-specific declarations for the PLL clocks on TI DA830/ OMAP-L137/AM17XX SoCs.
Signed-off-by: David Lechner <[email protected]> --- v7 changes: - include clkdev lookup registration here instead of in mach-davinci - Add platform_device_id lookup 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 | 58 +++++++++++++++++++++++++++++++++++++++++ drivers/clk/davinci/pll.c | 1 + drivers/clk/davinci/pll.h | 4 +++ 4 files changed, 64 insertions(+) create mode 100644 drivers/clk/davinci/pll-da830.c 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..240b17a --- /dev/null +++ b/drivers/clk/davinci/pll-da830.c @@ -0,0 +1,58 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * PLL clock descriptions for TI DA830/OMAP-L137/AM17XX + * + * Copyright (C) 2018 David Lechner <[email protected]> + */ + +#include <linux/clkdev.h> +#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_CLKMODE | 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), + { } +}; + +int __init da830_pll_init(struct device *dev, void __iomem *base) +{ + const struct davinci_pll_sysclk_info *info; + struct clk *clk; + + davinci_pll_clk_register(dev, &da830_pll_info, "ref_clk", base); + + clk = davinci_pll_auxclk_register(dev, "pll0_auxclk", base); + clk_register_clkdev(clk, NULL, "i2c_davinci.1"); + clk_register_clkdev(clk, "timer0", NULL); + clk_register_clkdev(clk, NULL, "davinci-wdt"); + + for (info = da830_pll_sysclk_info; info->name; info++) + davinci_pll_sysclk_register(dev, info, base); + + return 0; +} diff --git a/drivers/clk/davinci/pll.c b/drivers/clk/davinci/pll.c index e4f3e5f..9a22511 100644 --- a/drivers/clk/davinci/pll.c +++ b/drivers/clk/davinci/pll.c @@ -751,6 +751,7 @@ static const struct of_device_id davinci_pll_of_match[] = { }; static const struct platform_device_id davinci_pll_id_table[] = { + { .name = "da830-pll", .driver_data = (kernel_ulong_t)da830_pll_init }, { } }; diff --git a/drivers/clk/davinci/pll.h b/drivers/clk/davinci/pll.h index 50fe429..5c4c5c8 100644 --- a/drivers/clk/davinci/pll.h +++ b/drivers/clk/davinci/pll.h @@ -117,4 +117,8 @@ int of_davinci_pll_init(struct device *dev, u8 max_sysclk_id, void __iomem *base); +/* Platform-specific callbacks */ + +int da830_pll_init(struct device *dev, void __iomem *base); + #endif /* __CLK_DAVINCI_PLL_H___ */ -- 2.7.4
