Re: [PATCH 1/4] clk: remove tango4 driver

["Måns Rullgård" <mans@mansr.com>]

Arnd Bergmann <arnd@kernel.org> writes:

> From: Arnd Bergmann <arnd@arndb.de>
>
> The tango platform is getting removed, so the driver is no
> longer needed.
>
> Cc: Marc Gonzalez <marc.w.gonzalez@free.fr>
> Cc: Mans Rullgard <mans@mansr.com>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Acked-by: Mans Rullgard <mans@mansr.com>

> ---
>  .../bindings/clock/tango4-clock.txt           | 23 -----
>  drivers/clk/Makefile                          |  1 -
>  drivers/clk/clk-tango4.c                      | 85 -------------------
>  3 files changed, 109 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/clock/tango4-clock.txt
>  delete mode 100644 drivers/clk/clk-tango4.c
>
> diff --git a/Documentation/devicetree/bindings/clock/tango4-clock.txt b/Documentation/devicetree/bindings/clock/tango4-clock.txt
> deleted file mode 100644
> index 19c580a7bda2..000000000000
> --- a/Documentation/devicetree/bindings/clock/tango4-clock.txt
> +++ /dev/null
> @@ -1,23 +0,0 @@
> -* Sigma Designs Tango4 Clock Generator
> -
> -The Tango4 clock generator outputs cpu_clk and sys_clk (the latter is used
> -for RAM and various peripheral devices). The clock binding described here
> -is applicable to all Tango4 SoCs.
> -
> -Required Properties:
> -
> -- compatible: should be "sigma,tango4-clkgen".
>
> -- reg: physical base address of the device and length of memory mapped region.
> -- clocks: phandle of the input clock (crystal oscillator).
> -- clock-output-names: should be "cpuclk" and "sysclk".
> -- #clock-cells: should be set to 1.
> -
> -Example:
> -
> -	clkgen: clkgen@10000 {
> -		compatible = "sigma,tango4-clkgen";
> -		reg = <0x10000 0x40>;
> -		clocks = <&xtal>;
> -		clock-output-names = "cpuclk", "sysclk";
> -		#clock-cells = <1>;
> -	};
>
> diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
> index dbdc590e7de3..adf05704336e 100644
> --- a/drivers/clk/Makefile
> +++ b/drivers/clk/Makefile
> @@ -63,7 +63,6 @@ obj-$(CONFIG_COMMON_CLK_SI570)		+= clk-si570.o
>  obj-$(CONFIG_COMMON_CLK_STM32F)		+= clk-stm32f4.o
>  obj-$(CONFIG_COMMON_CLK_STM32H7)	+= clk-stm32h7.o
>  obj-$(CONFIG_COMMON_CLK_STM32MP157)	+= clk-stm32mp1.o
> -obj-$(CONFIG_ARCH_TANGO)		+= clk-tango4.o
>  obj-$(CONFIG_CLK_TWL6040)		+= clk-twl6040.o
>  obj-$(CONFIG_ARCH_U300)			+= clk-u300.o
>  obj-$(CONFIG_ARCH_VT8500)		+= clk-vt8500.o
> diff --git a/drivers/clk/clk-tango4.c b/drivers/clk/clk-tango4.c
> deleted file mode 100644
> index fe12a43f7a40..000000000000
> --- a/drivers/clk/clk-tango4.c
> +++ /dev/null
> @@ -1,85 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0
> -#include <linux/kernel.h>
> -#include <linux/clk-provider.h>
> -#include <linux/of_address.h>
> -#include <linux/init.h>
> -#include <linux/io.h>
> -
> -#define CLK_COUNT 4 /* cpu_clk, sys_clk, usb_clk, sdio_clk */
> -static struct clk *clks[CLK_COUNT];
> -static struct clk_onecell_data clk_data = { clks, CLK_COUNT };
> -
> -#define SYSCLK_DIV	0x20
> -#define CPUCLK_DIV	0x24
> -#define DIV_BYPASS	BIT(23)
> -
> -/*** CLKGEN_PLL ***/
> -#define extract_pll_n(val)	((val >>  0) & ((1u << 7) - 1))
> -#define extract_pll_k(val)	((val >> 13) & ((1u << 3) - 1))
> -#define extract_pll_m(val)	((val >> 16) & ((1u << 3) - 1))
> -#define extract_pll_isel(val)	((val >> 24) & ((1u << 3) - 1))
> -
> -static void __init make_pll(int idx, const char *parent, void __iomem *base)
> -{
> -	char name[8];
> -	u32 val, mul, div;
> -
> -	sprintf(name, "pll%d", idx);
> -	val = readl(base + idx * 8);
> -	mul =  extract_pll_n(val) + 1;
> -	div = (extract_pll_m(val) + 1) << extract_pll_k(val);
> -	clk_register_fixed_factor(NULL, name, parent, 0, mul, div);
> -	if (extract_pll_isel(val) != 1)
> -		panic("%s: input not set to XTAL_IN\n", name);
> -}
> -
> -static void __init make_cd(int idx, void __iomem *base)
> -{
> -	char name[8];
> -	u32 val, mul, div;
> -
> -	sprintf(name, "cd%d", idx);
> -	val = readl(base + idx * 8);
> -	mul =  1 << 27;
> -	div = (2 << 27) + val;
> -	clk_register_fixed_factor(NULL, name, "pll2", 0, mul, div);
> -	if (val > 0xf0000000)
> -		panic("%s: unsupported divider %x\n", name, val);
> -}
> -
> -static void __init tango4_clkgen_setup(struct device_node *np)
> -{
> -	struct clk **pp = clk_data.clks;
> -	void __iomem *base = of_iomap(np, 0);
> -	const char *parent = of_clk_get_parent_name(np, 0);
> -
> -	if (!base)
> -		panic("%pOFn: invalid address\n", np);
> -
> -	if (readl(base + CPUCLK_DIV) & DIV_BYPASS)
> -		panic("%pOFn: unsupported cpuclk setup\n", np);
> -
> -	if (readl(base + SYSCLK_DIV) & DIV_BYPASS)
> -		panic("%pOFn: unsupported sysclk setup\n", np);
> -
> -	writel(0x100, base + CPUCLK_DIV); /* disable frequency ramping */
> -
> -	make_pll(0, parent, base);
> -	make_pll(1, parent, base);
> -	make_pll(2, parent, base);
> -	make_cd(2, base + 0x80);
> -	make_cd(6, base + 0x80);
> -
> -	pp[0] = clk_register_divider(NULL, "cpu_clk", "pll0", 0,
> -			base + CPUCLK_DIV, 8, 8, CLK_DIVIDER_ONE_BASED, NULL);
> -	pp[1] = clk_register_fixed_factor(NULL, "sys_clk", "pll1", 0, 1, 4);
> -	pp[2] = clk_register_fixed_factor(NULL,  "usb_clk", "cd2", 0, 1, 2);
> -	pp[3] = clk_register_fixed_factor(NULL, "sdio_clk", "cd6", 0, 1, 2);
> -
> -	if (IS_ERR(pp[0]) || IS_ERR(pp[1]) || IS_ERR(pp[2]) || IS_ERR(pp[3]))
> -		panic("%pOFn: clk registration failed\n", np);
> -
> -	if (of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data))
> -		panic("%pOFn: clk provider registration failed\n", np);
> -}
> -CLK_OF_DECLARE(tango4_clkgen, "sigma,tango4-clkgen", tango4_clkgen_setup);
> -- 
>
> 2.29.2
>

-- 
Måns Rullgård

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