Commit 1c099779 authored by Jonas Gorski's avatar Jonas Gorski Committed by Stephen Boyd
Browse files

clk: add BCM63XX gated clock controller driver 



Add a driver for the gated clock controller found on MIPS based BCM63XX
SoCs.

Signed-off-by: default avatarJonas Gorski <jonas.gorski@gmail.com>
Reviewed-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: default avatarPhilippe Mathieu-Daudé <f4bug@amsat.org>
[sboyd@kernel.org: Remove module.h include and associated things for a
non-modular driver, add static on data tables, drop of_match_ptr()
usage, fix spdx tag to be a C++ style comment]
Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent dc1d9dac

drivers/clk/bcm/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -7,6 +7,14 @@ config CLK_BCM_63XX 
	  Enable common clock framework support for Broadcom BCM63xx DSL SoCs

	  based on the ARM architecture



config CLK_BCM_63XX_GATE

	bool "Broadcom BCM63xx gated clock support"

	depends on BMIPS_GENERIC || COMPILE_TEST

	default BMIPS_GENERIC

	help

	  Enable common clock framework support for Broadcom BCM63xx DSL SoCs

	  based on the MIPS architecture



config CLK_BCM_KONA

	bool "Broadcom Kona CCU clock support"

	depends on ARCH_BCM_MOBILE || COMPILE_TEST

drivers/clk/bcm/Makefile

+1 −0
Original line number Diff line number Diff line 
# SPDX-License-Identifier: GPL-2.0

obj-$(CONFIG_CLK_BCM_63XX)	+= clk-bcm63xx.o

obj-$(CONFIG_CLK_BCM_63XX_GATE)	+= clk-bcm63xx-gate.o

obj-$(CONFIG_CLK_BCM_KONA)	+= clk-kona.o

obj-$(CONFIG_CLK_BCM_KONA)	+= clk-kona-setup.o

obj-$(CONFIG_CLK_BCM_KONA)	+= clk-bcm281xx.o

drivers/clk/bcm/clk-bcm63xx-gate.c

0 → 100644
+238 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0



#include <linux/clk-provider.h>

#include <linux/init.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/platform_device.h>



struct clk_bcm63xx_table_entry {

	const char * const name;

	u8 bit;

	unsigned long flags;

};



struct clk_bcm63xx_hw {

	void __iomem *regs;

	spinlock_t lock;



	struct clk_hw_onecell_data data;

};



static const struct clk_bcm63xx_table_entry bcm3368_clocks[] = {

	{ .name = "mac", .bit = 3, },

	{ .name = "tc", .bit = 5, },

	{ .name = "us_top", .bit = 6, },

	{ .name = "ds_top", .bit = 7, },

	{ .name = "acm", .bit = 8, },

	{ .name = "spi", .bit = 9, },

	{ .name = "usbs", .bit = 10, },

	{ .name = "bmu", .bit = 11, },

	{ .name = "pcm", .bit = 12, },

	{ .name = "ntp", .bit = 13, },

	{ .name = "acp_b", .bit = 14, },

	{ .name = "acp_a", .bit = 15, },

	{ .name = "emusb", .bit = 17, },

	{ .name = "enet0", .bit = 18, },

	{ .name = "enet1", .bit = 19, },

	{ .name = "usbsu", .bit = 20, },

	{ .name = "ephy", .bit = 21, },

	{ },

};



static const struct clk_bcm63xx_table_entry bcm6328_clocks[] = {

	{ .name = "phy_mips", .bit = 0, },

	{ .name = "adsl_qproc", .bit = 1, },

	{ .name = "adsl_afe", .bit = 2, },

	{ .name = "adsl", .bit = 3, },

	{ .name = "mips", .bit = 4, .flags = CLK_IS_CRITICAL, },

	{ .name = "sar", .bit = 5, },

	{ .name = "pcm", .bit = 6, },

	{ .name = "usbd", .bit = 7, },

	{ .name = "usbh", .bit = 8, },

	{ .name = "hsspi", .bit = 9, },

	{ .name = "pcie", .bit = 10, },

	{ .name = "robosw", .bit = 11, },

	{ },

};



static const struct clk_bcm63xx_table_entry bcm6358_clocks[] = {

	{ .name = "enet", .bit = 4, },

	{ .name = "adslphy", .bit = 5, },

	{ .name = "pcm", .bit = 8, },

	{ .name = "spi", .bit = 9, },

	{ .name = "usbs", .bit = 10, },

	{ .name = "sar", .bit = 11, },

	{ .name = "emusb", .bit = 17, },

	{ .name = "enet0", .bit = 18, },

	{ .name = "enet1", .bit = 19, },

	{ .name = "usbsu", .bit = 20, },

	{ .name = "ephy", .bit = 21, },

	{ },

};



static const struct clk_bcm63xx_table_entry bcm6362_clocks[] = {

	{ .name = "adsl_qproc", .bit = 1, },

	{ .name = "adsl_afe", .bit = 2, },

	{ .name = "adsl", .bit = 3, },

	{ .name = "mips", .bit = 4, .flags = CLK_IS_CRITICAL, },

	{ .name = "wlan_ocp", .bit = 5, },

	{ .name = "swpkt_usb", .bit = 7, },

	{ .name = "swpkt_sar", .bit = 8, },

	{ .name = "sar", .bit = 9, },

	{ .name = "robosw", .bit = 10, },

	{ .name = "pcm", .bit = 11, },

	{ .name = "usbd", .bit = 12, },

	{ .name = "usbh", .bit = 13, },

	{ .name = "ipsec", .bit = 14, },

	{ .name = "spi", .bit = 15, },

	{ .name = "hsspi", .bit = 16, },

	{ .name = "pcie", .bit = 17, },

	{ .name = "fap", .bit = 18, },

	{ .name = "phymips", .bit = 19, },

	{ .name = "nand", .bit = 20, },

	{ },

};



static const struct clk_bcm63xx_table_entry bcm6368_clocks[] = {

	{ .name = "vdsl_qproc", .bit = 2, },

	{ .name = "vdsl_afe", .bit = 3, },

	{ .name = "vdsl_bonding", .bit = 4, },

	{ .name = "vdsl", .bit = 5, },

	{ .name = "phymips", .bit = 6, },

	{ .name = "swpkt_usb", .bit = 7, },

	{ .name = "swpkt_sar", .bit = 8, },

	{ .name = "spi", .bit = 9, },

	{ .name = "usbd", .bit = 10, },

	{ .name = "sar", .bit = 11, },

	{ .name = "robosw", .bit = 12, },

	{ .name = "utopia", .bit = 13, },

	{ .name = "pcm", .bit = 14, },

	{ .name = "usbh", .bit = 15, },

	{ .name = "disable_gless", .bit = 16, },

	{ .name = "nand", .bit = 17, },

	{ .name = "ipsec", .bit = 18, },

	{ },

};



static const struct clk_bcm63xx_table_entry bcm63268_clocks[] = {

	{ .name = "disable_gless", .bit = 0, },

	{ .name = "vdsl_qproc", .bit = 1, },

	{ .name = "vdsl_afe", .bit = 2, },

	{ .name = "vdsl", .bit = 3, },

	{ .name = "mips", .bit = 4, .flags = CLK_IS_CRITICAL, },

	{ .name = "wlan_ocp", .bit = 5, },

	{ .name = "dect", .bit = 6, },

	{ .name = "fap0", .bit = 7, },

	{ .name = "fap1", .bit = 8, },

	{ .name = "sar", .bit = 9, },

	{ .name = "robosw", .bit = 10, },

	{ .name = "pcm", .bit = 11, },

	{ .name = "usbd", .bit = 12, },

	{ .name = "usbh", .bit = 13, },

	{ .name = "ipsec", .bit = 14, },

	{ .name = "spi", .bit = 15, },

	{ .name = "hsspi", .bit = 16, },

	{ .name = "pcie", .bit = 17, },

	{ .name = "phymips", .bit = 18, },

	{ .name = "gmac", .bit = 19, },

	{ .name = "nand", .bit = 20, },

	{ .name = "tbus", .bit = 27, },

	{ .name = "robosw250", .bit = 31, },

	{ },

};



static int clk_bcm63xx_probe(struct platform_device *pdev)

{

	const struct clk_bcm63xx_table_entry *entry, *table;

	struct clk_bcm63xx_hw *hw;

	struct resource *r;

	u8 maxbit = 0;

	int i, ret;



	table = of_device_get_match_data(&pdev->dev);

	if (!table)

		return -EINVAL;



	for (entry = table; entry->name; entry++)

		maxbit = max_t(u8, maxbit, entry->bit);



	hw = devm_kzalloc(&pdev->dev, struct_size(hw, data.hws, maxbit),

			  GFP_KERNEL);

	if (!hw)

		return -ENOMEM;



	platform_set_drvdata(pdev, hw);



	spin_lock_init(&hw->lock);



	hw->data.num = maxbit;

	for (i = 0; i < maxbit; i++)

		hw->data.hws[i] = ERR_PTR(-ENODEV);



	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	hw->regs = devm_ioremap_resource(&pdev->dev, r);

	if (IS_ERR(hw->regs))

		return PTR_ERR(hw->regs);



	for (entry = table; entry->name; entry++) {

		struct clk_hw *clk;



		clk = clk_hw_register_gate(&pdev->dev, entry->name, NULL,

					   entry->flags, hw->regs, entry->bit,

					   CLK_GATE_BIG_ENDIAN, &hw->lock);

		if (IS_ERR(clk)) {

			ret = PTR_ERR(clk);

			goto out_err;

		}



		hw->data.hws[entry->bit] = clk;

	}



	ret = of_clk_add_hw_provider(pdev->dev.of_node, of_clk_hw_onecell_get,

				     &hw->data);

	if (!ret)

		return 0;

out_err:

	for (i = 0; i < hw->data.num; i++) {

		if (!IS_ERR(hw->data.hws[i]))

			clk_hw_unregister_gate(hw->data.hws[i]);

	}



	return ret;

}



static int clk_bcm63xx_remove(struct platform_device *pdev)

{

	struct clk_bcm63xx_hw *hw = platform_get_drvdata(pdev);

	int i;



	of_clk_del_provider(pdev->dev.of_node);



	for (i = 0; i < hw->data.num; i++) {

		if (!IS_ERR(hw->data.hws[i]))

			clk_hw_unregister_gate(hw->data.hws[i]);

	}



	return 0;

}



static const struct of_device_id clk_bcm63xx_dt_ids[] = {

	{ .compatible = "brcm,bcm3368-clocks", .data = &bcm3368_clocks, },

	{ .compatible = "brcm,bcm6328-clocks", .data = &bcm6328_clocks, },

	{ .compatible = "brcm,bcm6358-clocks", .data = &bcm6358_clocks, },

	{ .compatible = "brcm,bcm6362-clocks", .data = &bcm6362_clocks, },

	{ .compatible = "brcm,bcm6368-clocks", .data = &bcm6368_clocks, },

	{ .compatible = "brcm,bcm63268-clocks", .data = &bcm63268_clocks, },

	{ }

};



static struct platform_driver clk_bcm63xx = {

	.probe = clk_bcm63xx_probe,

	.remove = clk_bcm63xx_remove,

	.driver = {

		.name = "bcm63xx-clock",

		.of_match_table = clk_bcm63xx_dt_ids,

	},

};

builtin_platform_driver(clk_bcm63xx);

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