Commit 2bc61da9 authored by Chao Xie's avatar Chao Xie Committed by Michael Turquette
Browse files

clk: mmp: add pxa910 DT support for clock driver 



It adds the DT support for pxa910 clock subsystem.

Signed-off-by: default avatarChao Xie <chao.xie@marvell.com>
Acked-by: default avatarHaojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: default avatarMichael Turquette <mturquette@linaro.org>
parent ab08aefc

Documentation/devicetree/bindings/clock/marvell,pxa910.txt

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* Marvell PXA910 Clock Controller



The PXA910 clock subsystem generates and supplies clock to various

controllers within the PXA910 SoC.



Required Properties:



- compatible: should be one of the following.

  - "marvell,pxa910-clock" - controller compatible with PXA910 SoC.



- reg: physical base address of the clock subsystem and length of memory mapped

  region. There are 4 places in SOC has clock control logic:

  "mpmu", "apmu", "apbc", "apbcp". So four reg spaces need to be defined.



- #clock-cells: should be 1.

- #reset-cells: should be 1.



Each clock is assigned an identifier and client nodes use this identifier

to specify the clock which they consume.



All these identifier could be found in <dt-bindings/clock/marvell-pxa910.h>.

drivers/clk/mmp/Makefile

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@@ -6,7 +6,7 @@ obj-y += clk-apbc.o clk-apmu.o clk-frac.o clk-mix.o clk-gate.o clk.o 


obj-$(CONFIG_RESET_CONTROLLER) += reset.o



obj-$(CONFIG_MACH_MMP_DT) += clk-of-pxa168.o

obj-$(CONFIG_MACH_MMP_DT) += clk-of-pxa168.o clk-of-pxa910.o



obj-$(CONFIG_CPU_PXA168) += clk-pxa168.o

obj-$(CONFIG_CPU_PXA910) += clk-pxa910.o

drivers/clk/mmp/clk-of-pxa910.c

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/*

 * pxa910 clock framework source file

 *

 * Copyright (C) 2012 Marvell

 * Chao Xie <xiechao.mail@gmail.com>

 *

 * This file is licensed under the terms of the GNU General Public

 * License version 2. This program is licensed "as is" without any

 * warranty of any kind, whether express or implied.

 */



#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/spinlock.h>

#include <linux/io.h>

#include <linux/delay.h>

#include <linux/err.h>

#include <linux/of_address.h>



#include <dt-bindings/clock/marvell,pxa910.h>



#include "clk.h"

#include "reset.h"



#define APBC_RTC	0x28

#define APBC_TWSI0	0x2c

#define APBC_KPC	0x18

#define APBC_UART0	0x0

#define APBC_UART1	0x4

#define APBC_GPIO	0x8

#define APBC_PWM0	0xc

#define APBC_PWM1	0x10

#define APBC_PWM2	0x14

#define APBC_PWM3	0x18

#define APBC_SSP0	0x1c

#define APBC_SSP1	0x20

#define APBC_SSP2	0x4c

#define APBCP_TWSI1	0x28

#define APBCP_UART2	0x1c

#define APMU_SDH0	0x54

#define APMU_SDH1	0x58

#define APMU_USB	0x5c

#define APMU_DISP0	0x4c

#define APMU_CCIC0	0x50

#define APMU_DFC	0x60

#define MPMU_UART_PLL	0x14



struct pxa910_clk_unit {

	struct mmp_clk_unit unit;

	void __iomem *mpmu_base;

	void __iomem *apmu_base;

	void __iomem *apbc_base;

	void __iomem *apbcp_base;

};



static struct mmp_param_fixed_rate_clk fixed_rate_clks[] = {

	{PXA910_CLK_CLK32, "clk32", NULL, CLK_IS_ROOT, 32768},

	{PXA910_CLK_VCTCXO, "vctcxo", NULL, CLK_IS_ROOT, 26000000},

	{PXA910_CLK_PLL1, "pll1", NULL, CLK_IS_ROOT, 624000000},

};



static struct mmp_param_fixed_factor_clk fixed_factor_clks[] = {

	{PXA910_CLK_PLL1_2, "pll1_2", "pll1", 1, 2, 0},

	{PXA910_CLK_PLL1_4, "pll1_4", "pll1_2", 1, 2, 0},

	{PXA910_CLK_PLL1_8, "pll1_8", "pll1_4", 1, 2, 0},

	{PXA910_CLK_PLL1_16, "pll1_16", "pll1_8", 1, 2, 0},

	{PXA910_CLK_PLL1_6, "pll1_6", "pll1_2", 1, 3, 0},

	{PXA910_CLK_PLL1_12, "pll1_12", "pll1_6", 1, 2, 0},

	{PXA910_CLK_PLL1_24, "pll1_24", "pll1_12", 1, 2, 0},

	{PXA910_CLK_PLL1_48, "pll1_48", "pll1_24", 1, 2, 0},

	{PXA910_CLK_PLL1_96, "pll1_96", "pll1_48", 1, 2, 0},

	{PXA910_CLK_PLL1_13, "pll1_13", "pll1", 1, 13, 0},

	{PXA910_CLK_PLL1_13_1_5, "pll1_13_1_5", "pll1_13", 2, 3, 0},

	{PXA910_CLK_PLL1_2_1_5, "pll1_2_1_5", "pll1_2", 2, 3, 0},

	{PXA910_CLK_PLL1_3_16, "pll1_3_16", "pll1", 3, 16, 0},

};



static struct mmp_clk_factor_masks uart_factor_masks = {

	.factor = 2,

	.num_mask = 0x1fff,

	.den_mask = 0x1fff,

	.num_shift = 16,

	.den_shift = 0,

};



static struct mmp_clk_factor_tbl uart_factor_tbl[] = {

	{.num = 8125, .den = 1536},	/*14.745MHZ */

};



static void pxa910_pll_init(struct pxa910_clk_unit *pxa_unit)

{

	struct clk *clk;

	struct mmp_clk_unit *unit = &pxa_unit->unit;



	mmp_register_fixed_rate_clks(unit, fixed_rate_clks,

					ARRAY_SIZE(fixed_rate_clks));



	mmp_register_fixed_factor_clks(unit, fixed_factor_clks,

					ARRAY_SIZE(fixed_factor_clks));



	clk = mmp_clk_register_factor("uart_pll", "pll1_4",

				CLK_SET_RATE_PARENT,

				pxa_unit->mpmu_base + MPMU_UART_PLL,

				&uart_factor_masks, uart_factor_tbl,

				ARRAY_SIZE(uart_factor_tbl), NULL);

	mmp_clk_add(unit, PXA910_CLK_UART_PLL, clk);

}



static DEFINE_SPINLOCK(uart0_lock);

static DEFINE_SPINLOCK(uart1_lock);

static DEFINE_SPINLOCK(uart2_lock);

static const char *uart_parent_names[] = {"pll1_3_16", "uart_pll"};



static DEFINE_SPINLOCK(ssp0_lock);

static DEFINE_SPINLOCK(ssp1_lock);

static const char *ssp_parent_names[] = {"pll1_96", "pll1_48", "pll1_24", "pll1_12"};



static DEFINE_SPINLOCK(reset_lock);



static struct mmp_param_mux_clk apbc_mux_clks[] = {

	{0, "uart0_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART0, 4, 3, 0, &uart0_lock},

	{0, "uart1_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART1, 4, 3, 0, &uart1_lock},

	{0, "ssp0_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP0, 4, 3, 0, &ssp0_lock},

	{0, "ssp1_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP1, 4, 3, 0, &ssp1_lock},

};



static struct mmp_param_mux_clk apbcp_mux_clks[] = {

	{0, "uart2_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBCP_UART2, 4, 3, 0, &uart2_lock},

};



static struct mmp_param_gate_clk apbc_gate_clks[] = {

	{PXA910_CLK_TWSI0, "twsi0_clk", "pll1_13_1_5", CLK_SET_RATE_PARENT, APBC_TWSI0, 0x3, 0x3, 0x0, 0, &reset_lock},

	{PXA910_CLK_GPIO, "gpio_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_GPIO, 0x3, 0x3, 0x0, 0, &reset_lock},

	{PXA910_CLK_KPC, "kpc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_KPC, 0x3, 0x3, 0x0, MMP_CLK_GATE_NEED_DELAY, NULL},

	{PXA910_CLK_RTC, "rtc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_RTC, 0x83, 0x83, 0x0, MMP_CLK_GATE_NEED_DELAY, NULL},

	{PXA910_CLK_PWM0, "pwm0_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM0, 0x3, 0x3, 0x0, 0, &reset_lock},

	{PXA910_CLK_PWM1, "pwm1_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM1, 0x3, 0x3, 0x0, 0, &reset_lock},

	{PXA910_CLK_PWM2, "pwm2_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM2, 0x3, 0x3, 0x0, 0, &reset_lock},

	{PXA910_CLK_PWM3, "pwm3_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM3, 0x3, 0x3, 0x0, 0, &reset_lock},

	/* The gate clocks has mux parent. */

	{PXA910_CLK_UART0, "uart0_clk", "uart0_mux", CLK_SET_RATE_PARENT, APBC_UART0, 0x3, 0x3, 0x0, 0, &uart0_lock},

	{PXA910_CLK_UART1, "uart1_clk", "uart1_mux", CLK_SET_RATE_PARENT, APBC_UART1, 0x3, 0x3, 0x0, 0, &uart1_lock},

	{PXA910_CLK_SSP0, "ssp0_clk", "ssp0_mux", CLK_SET_RATE_PARENT, APBC_SSP0, 0x3, 0x3, 0x0, 0, &ssp0_lock},

	{PXA910_CLK_SSP1, "ssp1_clk", "ssp1_mux", CLK_SET_RATE_PARENT, APBC_SSP1, 0x3, 0x3, 0x0, 0, &ssp1_lock},

};



static struct mmp_param_gate_clk apbcp_gate_clks[] = {

	{PXA910_CLK_TWSI1, "twsi1_clk", "pll1_13_1_5", CLK_SET_RATE_PARENT, APBCP_TWSI1, 0x3, 0x3, 0x0, 0, &reset_lock},

	/* The gate clocks has mux parent. */

	{PXA910_CLK_UART2, "uart2_clk", "uart2_mux", CLK_SET_RATE_PARENT, APBCP_UART2, 0x3, 0x3, 0x0, 0, &uart2_lock},

};



static void pxa910_apb_periph_clk_init(struct pxa910_clk_unit *pxa_unit)

{

	struct mmp_clk_unit *unit = &pxa_unit->unit;



	mmp_register_mux_clks(unit, apbc_mux_clks, pxa_unit->apbc_base,

				ARRAY_SIZE(apbc_mux_clks));



	mmp_register_mux_clks(unit, apbcp_mux_clks, pxa_unit->apbcp_base,

				ARRAY_SIZE(apbcp_mux_clks));



	mmp_register_gate_clks(unit, apbc_gate_clks, pxa_unit->apbc_base,

				ARRAY_SIZE(apbc_gate_clks));



	mmp_register_gate_clks(unit, apbcp_gate_clks, pxa_unit->apbcp_base,

				ARRAY_SIZE(apbcp_gate_clks));

}



static DEFINE_SPINLOCK(sdh0_lock);

static DEFINE_SPINLOCK(sdh1_lock);

static const char *sdh_parent_names[] = {"pll1_12", "pll1_13"};



static DEFINE_SPINLOCK(usb_lock);



static DEFINE_SPINLOCK(disp0_lock);

static const char *disp_parent_names[] = {"pll1_2", "pll1_12"};



static DEFINE_SPINLOCK(ccic0_lock);

static const char *ccic_parent_names[] = {"pll1_2", "pll1_12"};

static const char *ccic_phy_parent_names[] = {"pll1_6", "pll1_12"};



static struct mmp_param_mux_clk apmu_mux_clks[] = {

	{0, "sdh0_mux", sdh_parent_names, ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, APMU_SDH0, 6, 1, 0, &sdh0_lock},

	{0, "sdh1_mux", sdh_parent_names, ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, APMU_SDH1, 6, 1, 0, &sdh1_lock},

	{0, "disp0_mux", disp_parent_names, ARRAY_SIZE(disp_parent_names), CLK_SET_RATE_PARENT, APMU_DISP0, 6, 1, 0, &disp0_lock},

	{0, "ccic0_mux", ccic_parent_names, ARRAY_SIZE(ccic_parent_names), CLK_SET_RATE_PARENT, APMU_CCIC0, 6, 1, 0, &ccic0_lock},

	{0, "ccic0_phy_mux", ccic_phy_parent_names, ARRAY_SIZE(ccic_phy_parent_names), CLK_SET_RATE_PARENT, APMU_CCIC0, 7, 1, 0, &ccic0_lock},

};



static struct mmp_param_div_clk apmu_div_clks[] = {

	{0, "ccic0_sphy_div", "ccic0_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 10, 5, 0, &ccic0_lock},

};



static struct mmp_param_gate_clk apmu_gate_clks[] = {

	{PXA910_CLK_DFC, "dfc_clk", "pll1_4", CLK_SET_RATE_PARENT, APMU_DFC, 0x19b, 0x19b, 0x0, 0, NULL},

	{PXA910_CLK_USB, "usb_clk", "usb_pll", 0, APMU_USB, 0x9, 0x9, 0x0, 0, &usb_lock},

	{PXA910_CLK_SPH, "sph_clk", "usb_pll", 0, APMU_USB, 0x12, 0x12, 0x0, 0, &usb_lock},

	/* The gate clocks has mux parent. */

	{PXA910_CLK_SDH0, "sdh0_clk", "sdh0_mux", CLK_SET_RATE_PARENT, APMU_SDH0, 0x1b, 0x1b, 0x0, 0, &sdh0_lock},

	{PXA910_CLK_SDH1, "sdh1_clk", "sdh1_mux", CLK_SET_RATE_PARENT, APMU_SDH1, 0x1b, 0x1b, 0x0, 0, &sdh1_lock},

	{PXA910_CLK_DISP0, "disp0_clk", "disp0_mux", CLK_SET_RATE_PARENT, APMU_DISP0, 0x1b, 0x1b, 0x0, 0, &disp0_lock},

	{PXA910_CLK_CCIC0, "ccic0_clk", "ccic0_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x1b, 0x1b, 0x0, 0, &ccic0_lock},

	{PXA910_CLK_CCIC0_PHY, "ccic0_phy_clk", "ccic0_phy_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x24, 0x24, 0x0, 0, &ccic0_lock},

	{PXA910_CLK_CCIC0_SPHY, "ccic0_sphy_clk", "ccic0_sphy_div", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x300, 0x300, 0x0, 0, &ccic0_lock},

};



static void pxa910_axi_periph_clk_init(struct pxa910_clk_unit *pxa_unit)

{

	struct mmp_clk_unit *unit = &pxa_unit->unit;



	mmp_register_mux_clks(unit, apmu_mux_clks, pxa_unit->apmu_base,

				ARRAY_SIZE(apmu_mux_clks));



	mmp_register_div_clks(unit, apmu_div_clks, pxa_unit->apmu_base,

				ARRAY_SIZE(apmu_div_clks));



	mmp_register_gate_clks(unit, apmu_gate_clks, pxa_unit->apmu_base,

				ARRAY_SIZE(apmu_gate_clks));

}



static void pxa910_clk_reset_init(struct device_node *np,

				struct pxa910_clk_unit *pxa_unit)

{

	struct mmp_clk_reset_cell *cells;

	int i, base, nr_resets_apbc, nr_resets_apbcp, nr_resets;



	nr_resets_apbc = ARRAY_SIZE(apbc_gate_clks);

	nr_resets_apbcp = ARRAY_SIZE(apbcp_gate_clks);

	nr_resets = nr_resets_apbc + nr_resets_apbcp;

	cells = kcalloc(nr_resets, sizeof(*cells), GFP_KERNEL);

	if (!cells)

		return;



	base = 0;

	for (i = 0; i < nr_resets_apbc; i++) {

		cells[base + i].clk_id = apbc_gate_clks[i].id;

		cells[base + i].reg =

			pxa_unit->apbc_base + apbc_gate_clks[i].offset;

		cells[base + i].flags = 0;

		cells[base + i].lock = apbc_gate_clks[i].lock;

		cells[base + i].bits = 0x4;

	}



	base = nr_resets_apbc;

	for (i = 0; i < nr_resets_apbcp; i++) {

		cells[base + i].clk_id = apbcp_gate_clks[i].id;

		cells[base + i].reg =

			pxa_unit->apbc_base + apbc_gate_clks[i].offset;

		cells[base + i].flags = 0;

		cells[base + i].lock = apbc_gate_clks[i].lock;

		cells[base + i].bits = 0x4;

	}



	mmp_clk_reset_register(np, cells, nr_resets);

}



static void __init pxa910_clk_init(struct device_node *np)

{

	struct pxa910_clk_unit *pxa_unit;



	pxa_unit = kzalloc(sizeof(*pxa_unit), GFP_KERNEL);

	if (!pxa_unit)

		return;



	pxa_unit->mpmu_base = of_iomap(np, 0);

	if (!pxa_unit->mpmu_base) {

		pr_err("failed to map mpmu registers\n");

		return;

	}



	pxa_unit->apmu_base = of_iomap(np, 1);

	if (!pxa_unit->mpmu_base) {

		pr_err("failed to map apmu registers\n");

		return;

	}



	pxa_unit->apbc_base = of_iomap(np, 2);

	if (!pxa_unit->apbc_base) {

		pr_err("failed to map apbc registers\n");

		return;

	}



	pxa_unit->apbcp_base = of_iomap(np, 3);

	if (!pxa_unit->mpmu_base) {

		pr_err("failed to map apbcp registers\n");

		return;

	}



	mmp_clk_init(np, &pxa_unit->unit, PXA910_NR_CLKS);



	pxa910_pll_init(pxa_unit);



	pxa910_apb_periph_clk_init(pxa_unit);



	pxa910_axi_periph_clk_init(pxa_unit);



	pxa910_clk_reset_init(np, pxa_unit);

}



CLK_OF_DECLARE(pxa910_clk, "marvell,pxa910-clock", pxa910_clk_init);

include/dt-bindings/clock/marvell,pxa910.h

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#ifndef __DTS_MARVELL_PXA910_CLOCK_H

#define __DTS_MARVELL_PXA910_CLOCK_H



/* fixed clocks and plls */

#define PXA910_CLK_CLK32		1

#define PXA910_CLK_VCTCXO		2

#define PXA910_CLK_PLL1			3

#define PXA910_CLK_PLL1_2		8

#define PXA910_CLK_PLL1_4		9

#define PXA910_CLK_PLL1_8		10

#define PXA910_CLK_PLL1_16		11

#define PXA910_CLK_PLL1_6		12

#define PXA910_CLK_PLL1_12		13

#define PXA910_CLK_PLL1_24		14

#define PXA910_CLK_PLL1_48		15

#define PXA910_CLK_PLL1_96		16

#define PXA910_CLK_PLL1_13		17

#define PXA910_CLK_PLL1_13_1_5		18

#define PXA910_CLK_PLL1_2_1_5		19

#define PXA910_CLK_PLL1_3_16		20

#define PXA910_CLK_UART_PLL		27



/* apb periphrals */

#define PXA910_CLK_TWSI0		60

#define PXA910_CLK_TWSI1		61

#define PXA910_CLK_TWSI2		62

#define PXA910_CLK_TWSI3		63

#define PXA910_CLK_GPIO			64

#define PXA910_CLK_KPC			65

#define PXA910_CLK_RTC			66

#define PXA910_CLK_PWM0			67

#define PXA910_CLK_PWM1			68

#define PXA910_CLK_PWM2			69

#define PXA910_CLK_PWM3			70

#define PXA910_CLK_UART0		71

#define PXA910_CLK_UART1		72

#define PXA910_CLK_UART2		73

#define PXA910_CLK_SSP0			74

#define PXA910_CLK_SSP1			75



/* axi periphrals */

#define PXA910_CLK_DFC			100

#define PXA910_CLK_SDH0			101

#define PXA910_CLK_SDH1			102

#define PXA910_CLK_SDH2			103

#define PXA910_CLK_USB			104

#define PXA910_CLK_SPH			105

#define PXA910_CLK_DISP0		106

#define PXA910_CLK_CCIC0		107

#define PXA910_CLK_CCIC0_PHY		108

#define PXA910_CLK_CCIC0_SPHY		109



#define PXA910_NR_CLKS			200

#endif

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