Commit 55921ce2 authored by Linus Walleij's avatar Linus Walleij Committed by Stephen Boyd
Browse files

clk: ux500: Convert ABx500 clocks to use OF probing 



These clocks have been broken for a long time unfortunately, a
hurdle of misc problems made them stop working at some point
breaking USB and audio on Ux500.

The platform as such and all "regular" clocks are migrated to
OF/device tree, so let's migrate also this driver.

With this patch and the corresponding DTS fixes, and a bunch
of probe deferral fixes, audio starts working again on Ux500.

Cc: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarStephen Boyd <sboyd@codeaurora.org>
parent 839a72af

drivers/clk/ux500/abx500-clk.c

+26 −10
Original line number Diff line number Diff line
@@ -10,19 +10,26 @@ 
#include <linux/err.h>

#include <linux/module.h>

#include <linux/device.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/mfd/abx500/ab8500.h>

#include <linux/mfd/abx500/ab8500-sysctrl.h>

#include <linux/clkdev.h>

#include <linux/clk-provider.h>

#include <dt-bindings/clock/ste-ab8500.h>

#include "clk.h"



#define AB8500_NUM_CLKS 6



static struct clk *ab8500_clks[AB8500_NUM_CLKS];

static struct clk_onecell_data ab8500_clk_data;



/* Clock definitions for ab8500 */

static int ab8500_reg_clks(struct device *dev)

{

	int ret;

	struct clk *clk;



	struct device_node *np = dev->of_node;

	const char *intclk_parents[] = {"ab8500_sysclk", "ulpclk"};

	u16 intclk_reg_sel[] = {0 , AB8500_SYSULPCLKCTRL1};

	u8 intclk_reg_mask[] = {0 , AB8500_SYSULPCLKCTRL1_SYSULPCLKINTSEL_MASK};
@@ -31,8 +38,6 @@ static int ab8500_reg_clks(struct device *dev) 
		(1 << AB8500_SYSULPCLKCTRL1_SYSULPCLKINTSEL_SHIFT)

	};



	dev_info(dev, "register clocks for ab850x\n");



	/* Enable SWAT */

	ret = ab8500_sysctrl_set(AB8500_SWATCTRL, AB8500_SWATCTRL_SWATENABLE);

	if (ret)
@@ -42,37 +47,43 @@ static int ab8500_reg_clks(struct device *dev) 
	clk = clk_reg_sysctrl_gate(dev , "ab8500_sysclk2", "ab8500_sysclk",

		AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_SYSCLKBUF2REQ,

		AB8500_SYSULPCLKCTRL1_SYSCLKBUF2REQ, 0, 0);

	clk_register_clkdev(clk, "sysclk", "0-0070");

	ab8500_clks[AB8500_SYSCLK_BUF2] = clk;



	/* ab8500_sysclk3 */

	clk = clk_reg_sysctrl_gate(dev , "ab8500_sysclk3", "ab8500_sysclk",

		AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_SYSCLKBUF3REQ,

		AB8500_SYSULPCLKCTRL1_SYSCLKBUF3REQ, 0, 0);

	clk_register_clkdev(clk, "sysclk", "cg1960_core.0");

	ab8500_clks[AB8500_SYSCLK_BUF3] = clk;



	/* ab8500_sysclk4 */

	clk = clk_reg_sysctrl_gate(dev , "ab8500_sysclk4", "ab8500_sysclk",

		AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_SYSCLKBUF4REQ,

		AB8500_SYSULPCLKCTRL1_SYSCLKBUF4REQ, 0, 0);

	ab8500_clks[AB8500_SYSCLK_BUF4] = clk;



	/* ab_ulpclk */

	clk = clk_reg_sysctrl_gate_fixed_rate(dev, "ulpclk", NULL,

		AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_ULPCLKREQ,

		AB8500_SYSULPCLKCTRL1_ULPCLKREQ,

		38400000, 9000, 0);

	clk_register_clkdev(clk, "ulpclk", "snd-soc-mop500.0");

	ab8500_clks[AB8500_SYSCLK_ULP] = clk;



	/* ab8500_intclk */

	clk = clk_reg_sysctrl_set_parent(dev , "intclk", intclk_parents, 2,

		intclk_reg_sel, intclk_reg_mask, intclk_reg_bits, 0);

	clk_register_clkdev(clk, "intclk", "snd-soc-mop500.0");

	clk_register_clkdev(clk, NULL, "ab8500-pwm.1");

	ab8500_clks[AB8500_SYSCLK_INT] = clk;



	/* ab8500_audioclk */

	clk = clk_reg_sysctrl_gate(dev , "audioclk", "intclk",

		AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_AUDIOCLKENA,

		AB8500_SYSULPCLKCTRL1_AUDIOCLKENA, 0, 0);

	clk_register_clkdev(clk, "audioclk", "ab8500-codec.0");

	ab8500_clks[AB8500_SYSCLK_AUDIO] = clk;



	ab8500_clk_data.clks = ab8500_clks;

	ab8500_clk_data.clk_num = ARRAY_SIZE(ab8500_clks);

	of_clk_add_provider(np, of_clk_src_onecell_get, &ab8500_clk_data);



	dev_info(dev, "registered clocks for ab850x\n");



	return 0;

}
@@ -108,9 +119,15 @@ static int abx500_clk_probe(struct platform_device *pdev) 
	return ret;

}



static const struct of_device_id abx500_clk_match[] = {

	{ .compatible = "stericsson,ab8500-clk", },

	{}

};



static struct platform_driver abx500_clk_driver = {

	.driver = {

		.name = "abx500-clk",

		.of_match_table = abx500_clk_match,

	},

	.probe	= abx500_clk_probe,

};
@@ -119,7 +136,6 @@ static int __init abx500_clk_init(void) 
{

	return platform_driver_register(&abx500_clk_driver);

}



arch_initcall(abx500_clk_init);



MODULE_AUTHOR("Ulf Hansson <ulf.hansson@linaro.org");

include/dt-bindings/clock/ste-ab8500.h

0 → 100644
+11 −0
Original line number Diff line number Diff line 
#ifndef __STE_CLK_AB8500_H__

#define __STE_CLK_AB8500_H__



#define AB8500_SYSCLK_BUF2	0

#define AB8500_SYSCLK_BUF3	1

#define AB8500_SYSCLK_BUF4	2

#define AB8500_SYSCLK_ULP	3

#define AB8500_SYSCLK_INT	4

#define AB8500_SYSCLK_AUDIO	5



#endif

CRA Git | Maintained and supported by SUSTech CRA and CCSE