diff options
Diffstat (limited to 'arch/arm/mach-u300/clock.c')
| -rw-r--r-- | arch/arm/mach-u300/clock.c | 139 |
1 files changed, 57 insertions, 82 deletions
diff --git a/arch/arm/mach-u300/clock.c b/arch/arm/mach-u300/clock.c index 5d12d547789..60acf9e708a 100644 --- a/arch/arm/mach-u300/clock.c +++ b/arch/arm/mach-u300/clock.c @@ -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, @@ -1212,23 +1238,24 @@ 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), @@ -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); |