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Diffstat (limited to 'arch/arm/mach-u300/clock.c')
-rw-r--r--arch/arm/mach-u300/clock.c145
1 files changed, 60 insertions, 85 deletions
diff --git a/arch/arm/mach-u300/clock.c b/arch/arm/mach-u300/clock.c
index 5d12d54..7458fc6 100644
--- a/arch/arm/mach-u300/clock.c
+++ b/arch/arm/mach-u300/clock.c
@@ -66,7 +66,7 @@ static DEFINE_SPINLOCK(syscon_resetreg_lock);
* AMBA bus
* |
* +- CPU
- * +- NANDIF NAND Flash interface
+ * +- FSMC NANDIF NAND Flash interface
* +- SEMI Shared Memory interface
* +- ISP Image Signal Processor (U335 only)
* +- CDS (U335 only)
@@ -726,7 +726,7 @@ static struct clk cpu_clk = {
};
static struct clk nandif_clk = {
- .name = "NANDIF",
+ .name = "FSMC",
.parent = &amba_clk,
.hw_ctrld = false,
.reset = true,
@@ -947,6 +947,10 @@ static struct clk fast_clk = {
.lock = __SPIN_LOCK_UNLOCKED(fast_clk.lock),
};
+/*
+ * The MMCI apb_pclk is hardwired to the same terminal as the
+ * external MCI clock. Thus this will be referenced twice.
+ */
static struct clk mmcsd_clk = {
.name = "MCLK",
.parent = &fast_clk,
@@ -1024,6 +1028,10 @@ static struct clk i2c1_clk = {
.lock = __SPIN_LOCK_UNLOCKED(i2c1_clk.lock),
};
+/*
+ * The SPI apb_pclk is hardwired to the same terminal as the
+ * external SPI clock. Thus this will be referenced twice.
+ */
static struct clk spi_clk = {
.name = "SPI",
.parent = &fast_clk,
@@ -1040,10 +1048,9 @@ static struct clk spi_clk = {
};
#ifdef CONFIG_MACH_U300_BS335
-static struct clk uart1_clk = {
- .name = "UART1",
+static struct clk uart1_pclk = {
+ .name = "UART1_PCLK",
.parent = &fast_clk,
- .rate = 13000000,
.hw_ctrld = false,
.reset = true,
.res_reg = U300_SYSCON_VBASE + U300_SYSCON_RFR,
@@ -1051,6 +1058,14 @@ static struct clk uart1_clk = {
.clk_val = U300_SYSCON_SBCER_UART1_CLK_EN,
.enable = syscon_clk_enable,
.disable = syscon_clk_disable,
+ .lock = __SPIN_LOCK_UNLOCKED(uart1_pclk.lock),
+};
+
+/* This one is hardwired to PLL13 */
+static struct clk uart1_clk = {
+ .name = "UART1_CLK",
+ .rate = 13000000,
+ .hw_ctrld = true,
.lock = __SPIN_LOCK_UNLOCKED(uart1_clk.lock),
};
#endif
@@ -1085,11 +1100,9 @@ static struct clk wdog_clk = {
.lock = __SPIN_LOCK_UNLOCKED(wdog_clk.lock),
};
-/* This one is hardwired to PLL13 */
-static struct clk uart_clk = {
- .name = "UARTCLK",
+static struct clk uart0_pclk = {
+ .name = "UART0_PCLK",
.parent = &slow_clk,
- .rate = 13000000,
.hw_ctrld = false,
.reset = true,
.res_reg = U300_SYSCON_VBASE + U300_SYSCON_RSR,
@@ -1097,7 +1110,16 @@ static struct clk uart_clk = {
.clk_val = U300_SYSCON_SBCER_UART_CLK_EN,
.enable = syscon_clk_enable,
.disable = syscon_clk_disable,
- .lock = __SPIN_LOCK_UNLOCKED(uart_clk.lock),
+ .lock = __SPIN_LOCK_UNLOCKED(uart0_pclk.lock),
+};
+
+/* This one is hardwired to PLL13 */
+static struct clk uart0_clk = {
+ .name = "UART0_CLK",
+ .parent = &slow_clk,
+ .rate = 13000000,
+ .hw_ctrld = true,
+ .lock = __SPIN_LOCK_UNLOCKED(uart0_clk.lock),
};
static struct clk keypad_clk = {
@@ -1182,10 +1204,14 @@ static struct clk timer_clk = {
.lock = __SPIN_LOCK_UNLOCKED(timer_clk.lock),
};
+/*
+ * There is a binary divider in the hardware that divides
+ * the 13MHz PLL by 13 down to 1 MHz.
+ */
static struct clk app_timer_clk = {
.name = "TIMER_APP",
.parent = &slow_clk,
- .rate = 13000000,
+ .rate = 1000000,
.hw_ctrld = true,
.reset = true,
.res_reg = U300_SYSCON_VBASE + U300_SYSCON_RSR,
@@ -1212,27 +1238,28 @@ static struct clk ppm_clk = {
};
#endif
-static struct clk dummy_apb_pclk;
-
#define DEF_LOOKUP(devid, clkref) \
{ \
.dev_id = devid, \
.clk = clkref, \
}
+#define DEF_LOOKUP_CON(devid, conid, clkref) \
+ { \
+ .dev_id = devid, \
+ .con_id = conid, \
+ .clk = clkref, \
+ }
+
/*
* Here we only define clocks that are meaningful to
* look up through clockdevice.
*/
static struct clk_lookup lookups[] = {
- {
- .con_id = "apb_pclk",
- .clk = &dummy_apb_pclk,
- },
/* Connected directly to the AMBA bus */
DEF_LOOKUP("amba", &amba_clk),
DEF_LOOKUP("cpu", &cpu_clk),
- DEF_LOOKUP("fsmc", &nandif_clk),
+ DEF_LOOKUP("fsmc-nand", &nandif_clk),
DEF_LOOKUP("semi", &semi_clk),
#ifdef CONFIG_MACH_U300_BS335
DEF_LOOKUP("isp", &isp_clk),
@@ -1247,11 +1274,14 @@ static struct clk_lookup lookups[] = {
/* AHB bridge clocks */
DEF_LOOKUP("ahb_subsys", &ahb_subsys_clk),
DEF_LOOKUP("intcon", &intcon_clk),
+ DEF_LOOKUP_CON("intcon", "apb_pclk", &intcon_clk),
DEF_LOOKUP("mspro", &mspro_clk),
DEF_LOOKUP("pl172", &emif_clk),
+ DEF_LOOKUP_CON("pl172", "apb_pclk", &emif_clk),
/* FAST bridge clocks */
DEF_LOOKUP("fast", &fast_clk),
DEF_LOOKUP("mmci", &mmcsd_clk),
+ DEF_LOOKUP_CON("mmci", "apb_pclk", &mmcsd_clk),
/*
* The .0 and .1 identifiers on these comes from the platform device
* .id field and are assigned when the platform devices are registered.
@@ -1261,13 +1291,16 @@ static struct clk_lookup lookups[] = {
DEF_LOOKUP("stu300.0", &i2c0_clk),
DEF_LOOKUP("stu300.1", &i2c1_clk),
DEF_LOOKUP("pl022", &spi_clk),
+ DEF_LOOKUP_CON("pl022", "apb_pclk", &spi_clk),
#ifdef CONFIG_MACH_U300_BS335
DEF_LOOKUP("uart1", &uart1_clk),
+ DEF_LOOKUP_CON("uart1", "apb_pclk", &uart1_pclk),
#endif
/* SLOW bridge clocks */
DEF_LOOKUP("slow", &slow_clk),
DEF_LOOKUP("coh901327_wdog", &wdog_clk),
- DEF_LOOKUP("uart0", &uart_clk),
+ DEF_LOOKUP("uart0", &uart0_clk),
+ DEF_LOOKUP_CON("uart0", "apb_pclk", &uart0_pclk),
DEF_LOOKUP("apptimer", &app_timer_clk),
DEF_LOOKUP("coh901461-keypad", &keypad_clk),
DEF_LOOKUP("u300-gpio", &gpio_clk),
@@ -1286,64 +1319,6 @@ static void __init clk_register(void)
clkdev_add_table(lookups, ARRAY_SIZE(lookups));
}
-/*
- * These are the clocks for cells registered as primecell drivers
- * on the AMBA bus. These must be on during AMBA device registration
- * since the bus probe will attempt to read magic configuration
- * registers for these devices. If they are deactivated these probes
- * will fail.
- *
- *
- * Please note that on emif, both RAM and NAND is connected in dual
- * RAM phones. On single RAM phones, ram is on semi and NAND on emif.
- *
- */
-void u300_clock_primecells(void)
-{
- clk_enable(&intcon_clk);
- clk_enable(&uart_clk);
-#ifdef CONFIG_MACH_U300_BS335
- clk_enable(&uart1_clk);
-#endif
- clk_enable(&spi_clk);
-
- clk_enable(&mmcsd_clk);
-
-}
-EXPORT_SYMBOL(u300_clock_primecells);
-
-void u300_unclock_primecells(void)
-{
-
- clk_disable(&intcon_clk);
- clk_disable(&uart_clk);
-#ifdef CONFIG_MACH_U300_BS335
- clk_disable(&uart1_clk);
-#endif
- clk_disable(&spi_clk);
- clk_disable(&mmcsd_clk);
-
-}
-EXPORT_SYMBOL(u300_unclock_primecells);
-
-/*
- * The interrupt controller is enabled before the clock API is registered.
- */
-void u300_enable_intcon_clock(void)
-{
- clk_enable(&intcon_clk);
-}
-EXPORT_SYMBOL(u300_enable_intcon_clock);
-
-/*
- * The timer is enabled before the clock API is registered.
- */
-void u300_enable_timer_clock(void)
-{
- clk_enable(&app_timer_clk);
-}
-EXPORT_SYMBOL(u300_enable_timer_clock);
-
#if (defined(CONFIG_DEBUG_FS) && defined(CONFIG_U300_DEBUG))
/*
* The following makes it possible to view the status (especially
@@ -1385,11 +1360,13 @@ static struct clk *clks[] = {
&spi_clk,
#ifdef CONFIG_MACH_U300_BS335
&uart1_clk,
+ &uart1_pclk,
#endif
/* SLOW bridge clocks */
&slow_clk,
&wdog_clk,
- &uart_clk,
+ &uart0_clk,
+ &uart0_pclk,
&app_timer_clk,
&keypad_clk,
&gpio_clk,
@@ -1430,7 +1407,7 @@ static int u300_clocks_show(struct seq_file *s, void *data)
chars++;
}
cdp[32] = '\0';
- if (clk->get_rate)
+ if (clk->get_rate || clk->rate != 0)
seq_printf(s,
"%s%s\t%s\t%d\t%s\t%lu Hz\n",
&cdp[0],
@@ -1439,7 +1416,7 @@ static int u300_clocks_show(struct seq_file *s, void *data)
clk->usecount ? "ON" : "OFF",
clk->usecount,
clk->hw_ctrld ? "YES" : "NO ",
- clk->get_rate(clk));
+ clk_get_rate(clk));
else
seq_printf(s,
"%s%s\t%s\t%d\t%s\t" \
@@ -1483,7 +1460,7 @@ static int __init init_clk_read_debugfs(void)
module_init(init_clk_read_debugfs);
#endif
-static int __init u300_clock_init(void)
+int __init u300_clock_init(void)
{
u16 val;
@@ -1520,10 +1497,8 @@ static int __init u300_clock_init(void)
*/
syscon_block_reset_disable(&semi_clk);
syscon_block_reset_disable(&emif_clk);
- semi_clk.enable(&semi_clk);
- emif_clk.enable(&emif_clk);
+ clk_enable(&semi_clk);
+ clk_enable(&emif_clk);
return 0;
}
-/* initialize clocking early to be available later in the boot */
-core_initcall(u300_clock_init);
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