[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>

1 files changed, 153 insertions, 1 deletions

diff --git a/arch/arm/mach-at91rm9200/at91rm9200.c b/arch/arm/mach-at91rm9200/at91rm9200.c
index e21cb845d112..ae04cbdf0bff 100644
--- a/arch/arm/mach-at91rm9200/at91rm9200.c
+++ b/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();
 }
 
 /*