[ARM] 3866/1: AT91 clock update

This patch makes the AT91 clock.c support processor-generic (AT91RM9200
and AT91SAM9xxx).  The clocks supported by a particular AT91 processor
are defined in the processor-specific file and are registered with
clock.c at startup.
Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-at91rm9200/at91rm9200.c

@@ -17,6 +17,7 @@
 
 #include <asm/hardware.h>
 #include "generic.h"
+#include "clock.h"
 
 static struct map_desc at91rm9200_io_desc[] __initdata = {
 	{
@@ -102,9 +103,160 @@ static struct map_desc at91rm9200_io_desc[] __initdata = {
 	},
 };
 
-void __init at91rm9200_map_io(void)
+/* --------------------------------------------------------------------
+ *  Clocks
+ * -------------------------------------------------------------------- */
+
+/*
+ * The peripheral clocks.
+ */
+static struct clk udc_clk = {
+	.name		= "udc_clk",
+	.pmc_mask	= 1 << AT91RM9200_ID_UDP,
+	.type		= CLK_TYPE_PERIPHERAL,
+};
+static struct clk ohci_clk = {
+	.name		= "ohci_clk",
+	.pmc_mask	= 1 << AT91RM9200_ID_UHP,
+	.type		= CLK_TYPE_PERIPHERAL,
+};
+static struct clk ether_clk = {
+	.name		= "ether_clk",
+	.pmc_mask	= 1 << AT91RM9200_ID_EMAC,
+	.type		= CLK_TYPE_PERIPHERAL,
+};
+static struct clk mmc_clk = {
+	.name		= "mci_clk",
+	.pmc_mask	= 1 << AT91RM9200_ID_MCI,
+	.type		= CLK_TYPE_PERIPHERAL,
+};
+static struct clk twi_clk = {
+	.name		= "twi_clk",
+	.pmc_mask	= 1 << AT91RM9200_ID_TWI,
+	.type		= CLK_TYPE_PERIPHERAL,
+};
+static struct clk usart0_clk = {
+	.name		= "usart0_clk",
+	.pmc_mask	= 1 << AT91RM9200_ID_US0,
+	.type		= CLK_TYPE_PERIPHERAL,
+};
+static struct clk usart1_clk = {
+	.name		= "usart1_clk",
+	.pmc_mask	= 1 << AT91RM9200_ID_US1,
+	.type		= CLK_TYPE_PERIPHERAL,
+};
+static struct clk usart2_clk = {
+	.name		= "usart2_clk",
+	.pmc_mask	= 1 << AT91RM9200_ID_US2,
+	.type		= CLK_TYPE_PERIPHERAL,
+};
+static struct clk usart3_clk = {
+	.name		= "usart3_clk",
+	.pmc_mask	= 1 << AT91RM9200_ID_US3,
+	.type		= CLK_TYPE_PERIPHERAL,
+};
+static struct clk spi_clk = {
+	.name		= "spi_clk",
+	.pmc_mask	= 1 << AT91RM9200_ID_SPI,
+	.type		= CLK_TYPE_PERIPHERAL,
+};
+static struct clk pioA_clk = {
+	.name		= "pioA_clk",
+	.pmc_mask	= 1 << AT91RM9200_ID_PIOA,
+	.type		= CLK_TYPE_PERIPHERAL,
+};
+static struct clk pioB_clk = {
+	.name		= "pioB_clk",
+	.pmc_mask	= 1 << AT91RM9200_ID_PIOB,
+	.type		= CLK_TYPE_PERIPHERAL,
+};
+static struct clk pioC_clk = {
+	.name		= "pioC_clk",
+	.pmc_mask	= 1 << AT91RM9200_ID_PIOC,
+	.type		= CLK_TYPE_PERIPHERAL,
+};
+static struct clk pioD_clk = {
+	.name		= "pioD_clk",
+	.pmc_mask	= 1 << AT91RM9200_ID_PIOD,
+	.type		= CLK_TYPE_PERIPHERAL,
+};
+
+static struct clk *periph_clocks[] __initdata = {
+	&pioA_clk,
+	&pioB_clk,
+	&pioC_clk,
+	&pioD_clk,
+	&usart0_clk,
+	&usart1_clk,
+	&usart2_clk,
+	&usart3_clk,
+	&mmc_clk,
+	&udc_clk,
+	&twi_clk,
+	&spi_clk,
+	// ssc 0 .. ssc2
+	// tc0 .. tc5
+	&ohci_clk,
+	&ether_clk,
+	// irq0 .. irq6
+};
+
+/*
+ * The four programmable clocks.
+ * You must configure pin multiplexing to bring these signals out.
+ */
+static struct clk pck0 = {
+	.name		= "pck0",
+	.pmc_mask	= AT91_PMC_PCK0,
+	.type		= CLK_TYPE_PROGRAMMABLE,
+	.id		= 0,
+};
+static struct clk pck1 = {
+	.name		= "pck1",
+	.pmc_mask	= AT91_PMC_PCK1,
+	.type		= CLK_TYPE_PROGRAMMABLE,
+	.id		= 1,
+};
+static struct clk pck2 = {
+	.name		= "pck2",
+	.pmc_mask	= AT91_PMC_PCK2,
+	.type		= CLK_TYPE_PROGRAMMABLE,
+	.id		= 2,
+};
+static struct clk pck3 = {
+	.name		= "pck3",
+	.pmc_mask	= AT91_PMC_PCK3,
+	.type		= CLK_TYPE_PROGRAMMABLE,
+	.id		= 3,
+};
+
+static void __init at91rm9200_register_clocks(void)
 {
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
+		clk_register(periph_clocks[i]);
+
+	clk_register(&pck0);
+	clk_register(&pck1);
+	clk_register(&pck2);
+	clk_register(&pck3);
+}
+
+
+/* --------------------------------------------------------------------
+ *  AT91RM9200 processor initialization
+ * -------------------------------------------------------------------- */
+void __init at91rm9200_initialize(unsigned long main_clock)
+{
+	/* Map peripherals */
 	iotable_init(at91rm9200_io_desc, ARRAY_SIZE(at91rm9200_io_desc));
+
+	/* Init clock subsystem */
+	at91_clock_init(main_clock);
+
+	/* Register the processor-specific clocks */
+	at91rm9200_register_clocks();
 }
 
 /*

arch/arm/mach-at91rm9200/board-1arm.c

@@ -34,7 +34,6 @@
 #include <asm/mach/map.h>
 #include <asm/mach/irq.h>
 
-#include <asm/hardware.h>
 #include <asm/arch/board.h>
 #include <asm/arch/gpio.h>
 
@@ -62,10 +61,8 @@ static struct at91_uart_config __initdata onearm_uart_config = {
 
 static void __init onearm_map_io(void)
 {
-	at91rm9200_map_io();
-
-	/* Initialize clocks: 18.432 MHz crystal */
-	at91_clock_init(18432000);
+	/* Initialize processor: 18.432 MHz crystal */
+	at91rm9200_initialize(18432000);
 
 	/* Setup the serial ports and console */
 	at91_init_serial(&onearm_uart_config);

arch/arm/mach-at91rm9200/board-carmeva.c

@@ -35,7 +35,6 @@
 #include <asm/mach/map.h>
 #include <asm/mach/irq.h>
 
-#include <asm/hardware.h>
 #include <asm/arch/board.h>
 #include <asm/arch/gpio.h>
 
@@ -63,10 +62,8 @@ static struct at91_uart_config __initdata carmeva_uart_config = {
 
 static void __init carmeva_map_io(void)
 {
-	at91rm9200_map_io();
-
-	/* Initialize clocks: 20.000 MHz crystal */
-	at91_clock_init(20000000);
+	/* Initialize processor: 20.000 MHz crystal */
+	at91rm9200_initialize(20000000);
 
 	/* Setup the serial ports and console */
 	at91_init_serial(&carmeva_uart_config);

arch/arm/mach-at91rm9200/board-csb337.c

@@ -34,7 +34,6 @@
 #include <asm/mach/map.h>
 #include <asm/mach/irq.h>
 
-#include <asm/hardware.h>
 #include <asm/arch/board.h>
 #include <asm/arch/gpio.h>
 
@@ -62,10 +61,8 @@ static struct at91_uart_config __initdata csb337_uart_config = {
 
 static void __init csb337_map_io(void)
 {
-	at91rm9200_map_io();
-
-	/* Initialize clocks: 3.6864 MHz crystal */
-	at91_clock_init(3686400);
+	/* Initialize processor: 3.6864 MHz crystal */
+	at91rm9200_initialize(3686400);
 
 	/* Setup the LEDs */
 	at91_init_leds(AT91_PIN_PB0, AT91_PIN_PB1);

arch/arm/mach-at91rm9200/board-csb637.c

@@ -33,7 +33,6 @@
 #include <asm/mach/map.h>
 #include <asm/mach/irq.h>
 
-#include <asm/hardware.h>
 #include <asm/arch/board.h>
 #include <asm/arch/gpio.h>
 
@@ -61,10 +60,8 @@ static struct at91_uart_config __initdata csb637_uart_config = {
 
 static void __init csb637_map_io(void)
 {
-	at91rm9200_map_io();
-
-	/* Initialize clocks: 3.6864 MHz crystal */
-	at91_clock_init(3686400);
+	/* Initialize processor: 3.6864 MHz crystal */
+	at91rm9200_initialize(3686400);
 
 	/* Setup the LEDs */
 	at91_init_leds(AT91_PIN_PB2, AT91_PIN_PB2);

arch/arm/mach-at91rm9200/board-dk.c

@@ -37,7 +37,6 @@
 #include <asm/mach/map.h>
 #include <asm/mach/irq.h>
 
-#include <asm/hardware.h>
 #include <asm/arch/board.h>
 #include <asm/arch/gpio.h>
 
@@ -65,10 +64,8 @@ static struct at91_uart_config __initdata dk_uart_config = {
 
 static void __init dk_map_io(void)
 {
-	at91rm9200_map_io();
-
-	/* Initialize clocks: 18.432 MHz crystal */
-	at91_clock_init(18432000);
+	/* Initialize processor: 18.432 MHz crystal */
+	at91rm9200_initialize(18432000);
 
 	/* Setup the LEDs */
 	at91_init_leds(AT91_PIN_PB2, AT91_PIN_PB2);

arch/arm/mach-at91rm9200/board-eb9200.c

@@ -35,7 +35,6 @@
 #include <asm/mach/map.h>
 #include <asm/mach/irq.h>
 
-#include <asm/hardware.h>
 #include <asm/arch/board.h>
 #include <asm/arch/gpio.h>
 
@@ -63,10 +62,8 @@ static struct at91_uart_config __initdata eb9200_uart_config = {
 
 static void __init eb9200_map_io(void)
 {
-	at91rm9200_map_io();
-
-	/* Initialize clocks: 18.432 MHz crystal */
-	at91_clock_init(18432000);
+	/* Initialize processor: 18.432 MHz crystal */
+	at91rm9200_initialize(18432000);
 
 	/* Setup the serial ports and console */
 	at91_init_serial(&eb9200_uart_config);

arch/arm/mach-at91rm9200/board-ek.c

@@ -37,7 +37,6 @@
 #include <asm/mach/map.h>
 #include <asm/mach/irq.h>
 
-#include <asm/hardware.h>
 #include <asm/arch/board.h>
 #include <asm/arch/gpio.h>
 
@@ -65,10 +64,8 @@ static struct at91_uart_config __initdata ek_uart_config = {
 
 static void __init ek_map_io(void)
 {
-	at91rm9200_map_io();
-
-	/* Initialize clocks: 18.432 MHz crystal */
-	at91_clock_init(18432000);
+	/* Initialize processor: 18.432 MHz crystal */
+	at91rm9200_initialize(18432000);
 
 	/* Setup the LEDs */
 	at91_init_leds(AT91_PIN_PB1, AT91_PIN_PB2);

arch/arm/mach-at91rm9200/board-kafa.c

@@ -34,7 +34,6 @@
 #include <asm/mach/map.h>
 #include <asm/mach/irq.h>
 
-#include <asm/hardware.h>
 #include <asm/arch/board.h>
 #include <asm/arch/gpio.h>
 
@@ -62,10 +61,8 @@ static struct at91_uart_config __initdata kafa_uart_config = {
 
 static void __init kafa_map_io(void)
 {
-	at91rm9200_map_io();
-
-	/* Initialize clocks: 18.432 MHz crystal */
-	at91_clock_init(18432000);
+	/* Initialize processor: 18.432 MHz crystal */
+	at91rm9200_initialize(18432000);
 
 	/* Set up the LEDs */
 	at91_init_leds(AT91_PIN_PB4, AT91_PIN_PB4);

arch/arm/mach-at91rm9200/board-kb9202.c

@@ -35,7 +35,6 @@
 #include <asm/mach/map.h>
 #include <asm/mach/irq.h>
 
-#include <asm/hardware.h>
 #include <asm/arch/board.h>
 #include <asm/arch/gpio.h>
 
@@ -63,10 +62,8 @@ static struct at91_uart_config __initdata kb9202_uart_config = {
 
 static void __init kb9202_map_io(void)
 {
-	at91rm9200_map_io();
-
-	/* Initialize clocks: 10 MHz crystal */
-	at91_clock_init(10000000);
+	/* Initialize processor: 10 MHz crystal */
+	at91rm9200_initialize(10000000);
 
 	/* Set up the LEDs */
 	at91_init_leds(AT91_PIN_PC19, AT91_PIN_PC18);

arch/arm/mach-at91rm9200/clock.h

+/*
+ * linux/arch/arm/mach-at91rm9200/clock.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#define CLK_TYPE_PRIMARY	0x1
+#define CLK_TYPE_PLL		0x2
+#define CLK_TYPE_PROGRAMMABLE	0x4
+#define CLK_TYPE_PERIPHERAL	0x8
+
+
+struct clk {
+	struct list_head node;
+	const char	*name;		/* unique clock name */
+	const char	*function;	/* function of the clock */
+	struct device	*dev;		/* device associated with function */
+	unsigned long	rate_hz;
+	struct clk	*parent;
+	u32		pmc_mask;
+	void		(*mode)(struct clk *, int);
+	unsigned	id:2;		/* PCK0..3, or 32k/main/a/b */
+	unsigned	type;		/* clock type */
+	u16		users;
+};
+
+
+extern int __init clk_register(struct clk *clk);

arch/arm/mach-at91rm9200/generic.h

@@ -8,6 +8,9 @@
  * published by the Free Software Foundation.
  */
 
+ /* Processors */
+extern void __init at91rm9200_initialize(unsigned long main_clock);
+
  /* Interrupts */
 extern void __init at91rm9200_init_irq(unsigned int priority[]);
 extern void __init at91_aic_init(unsigned int priority[]);
@@ -17,9 +20,6 @@ extern void __init at91_gpio_irq_setup(unsigned banks);
 struct sys_timer;
 extern struct sys_timer at91rm9200_timer;
 
- /* Memory Map */
-extern void __init at91rm9200_map_io(void);
-
  /* Clocks */
 extern int __init at91_clock_init(unsigned long main_clock);
 struct device;