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Commit ce6e1188 authored by Purna Chandra Mandal's avatar Purna Chandra Mandal Committed by Ralf Baechle
Browse files

CLK: microchip: Add Microchip PIC32 clock driver. 



This clock driver implements PIC32 specific clock-tree. clock-tree
entities can only be configured through device-tree file (OF).

Signed-off-by: default avatarPurna Chandra Mandal <purna.mandal@microchip.com>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-clk@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13247/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent d863dc9e

drivers/clk/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -197,6 +197,9 @@ config COMMON_CLK_PXA 
	---help---

	  Support for the Marvell PXA SoC.



config COMMON_CLK_PIC32

	def_bool COMMON_CLK && MACH_PIC32



source "drivers/clk/bcm/Kconfig"

source "drivers/clk/hisilicon/Kconfig"

source "drivers/clk/mvebu/Kconfig"

drivers/clk/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -58,6 +58,7 @@ obj-$(CONFIG_ARCH_MXC) += imx/ 
obj-$(CONFIG_MACH_INGENIC)		+= ingenic/

obj-$(CONFIG_COMMON_CLK_KEYSTONE)	+= keystone/

obj-$(CONFIG_ARCH_MEDIATEK)		+= mediatek/

obj-$(CONFIG_MACH_PIC32)		+= microchip/

ifeq ($(CONFIG_COMMON_CLK), y)

obj-$(CONFIG_ARCH_MMP)			+= mmp/

endif

drivers/clk/microchip/Makefile

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+2 −0
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obj-$(CONFIG_COMMON_CLK_PIC32) += clk-core.o

obj-$(CONFIG_PIC32MZDA) += clk-pic32mzda.o

drivers/clk/microchip/clk-core.c

0 → 100644
+1031 −0

File added.

Preview size limit exceeded, changes collapsed.

drivers/clk/microchip/clk-core.h

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+84 −0
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/*

 * Purna Chandra Mandal,<purna.mandal@microchip.com>

 * Copyright (C) 2015 Microchip Technology Inc.  All rights reserved.

 *

 * This program is free software; you can distribute it and/or modify it

 * under the terms of the GNU General Public License (Version 2) as

 * published by the Free Software Foundation.

 *

 * This program is distributed in the hope it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * for more details.

 */

#ifndef __MICROCHIP_CLK_PIC32_H_

#define __MICROCHIP_CLK_PIC32_H_



#include <linux/clk-provider.h>



/* PIC32 clock data */

struct pic32_clk_common {

	struct device *dev;

	void __iomem *iobase;

	spinlock_t reg_lock; /* clock lock */

};



/* System PLL clock */

struct pic32_sys_pll_data {

	struct clk_init_data init_data;

	const u32 ctrl_reg;

	const u32 status_reg;

	const u32 lock_mask;

};



/* System clock */

struct pic32_sys_clk_data {

	struct clk_init_data init_data;

	const u32 mux_reg;

	const u32 slew_reg;

	const u32 *parent_map;

	const u32 slew_div;

};



/* Reference Oscillator clock */

struct pic32_ref_osc_data {

	struct clk_init_data init_data;

	const u32 ctrl_reg;

	const u32 *parent_map;

};



/* Peripheral Bus clock */

struct pic32_periph_clk_data {

	struct clk_init_data init_data;

	const u32 ctrl_reg;

};



/* External Secondary Oscillator clock  */

struct pic32_sec_osc_data {

	struct clk_init_data init_data;

	const u32 enable_reg;

	const u32 status_reg;

	const u32 enable_mask;

	const u32 status_mask;

	const unsigned long fixed_rate;

};



extern const struct clk_ops pic32_pbclk_ops;

extern const struct clk_ops pic32_sclk_ops;

extern const struct clk_ops pic32_sclk_no_div_ops;

extern const struct clk_ops pic32_spll_ops;

extern const struct clk_ops pic32_roclk_ops;

extern const struct clk_ops pic32_sosc_ops;



struct clk *pic32_periph_clk_register(const struct pic32_periph_clk_data *data,

				      struct pic32_clk_common *core);

struct clk *pic32_refo_clk_register(const struct pic32_ref_osc_data *data,

				    struct pic32_clk_common *core);

struct clk *pic32_sys_clk_register(const struct pic32_sys_clk_data *data,

				   struct pic32_clk_common *core);

struct clk *pic32_spll_clk_register(const struct pic32_sys_pll_data *data,

				    struct pic32_clk_common *core);

struct clk *pic32_sosc_clk_register(const struct pic32_sec_osc_data *data,

				    struct pic32_clk_common *core);



#endif /* __MICROCHIP_CLK_PIC32_H_*/