diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/platforms/52xx/efika.c | 3 | ||||
| -rw-r--r-- | arch/powerpc/platforms/52xx/lite5200.c | 10 | ||||
| -rw-r--r-- | arch/powerpc/platforms/52xx/mpc5200_simple.c | 6 | ||||
| -rw-r--r-- | arch/powerpc/platforms/52xx/mpc52xx_common.c | 65 | ||||
| -rw-r--r-- | arch/ppc/syslib/mpc52xx_setup.c | 36 |
5 files changed, 108 insertions, 12 deletions
diff --git a/arch/powerpc/platforms/52xx/efika.c b/arch/powerpc/platforms/52xx/efika.c index a0da70c8b50..a2068faef6e 100644 --- a/arch/powerpc/platforms/52xx/efika.c +++ b/arch/powerpc/platforms/52xx/efika.c @@ -180,6 +180,9 @@ static void __init efika_setup_arch(void) { rtas_initialize(); + /* Map important registers from the internal memory map */ + mpc52xx_map_common_devices(); + efika_pcisetup(); #ifdef CONFIG_PM diff --git a/arch/powerpc/platforms/52xx/lite5200.c b/arch/powerpc/platforms/52xx/lite5200.c index fb35b285a14..956f459e175 100644 --- a/arch/powerpc/platforms/52xx/lite5200.c +++ b/arch/powerpc/platforms/52xx/lite5200.c @@ -152,15 +152,15 @@ static void __init lite5200_setup_arch(void) if (ppc_md.progress) ppc_md.progress("lite5200_setup_arch()", 0); - /* Fix things that firmware should have done. */ - lite5200_fix_clock_config(); - lite5200_fix_port_config(); + /* Map important registers from the internal memory map */ + mpc52xx_map_common_devices(); /* Some mpc5200 & mpc5200b related configuration */ mpc5200_setup_xlb_arbiter(); - /* Map wdt for mpc52xx_restart() */ - mpc52xx_map_wdt(); + /* Fix things that firmware should have done. */ + lite5200_fix_clock_config(); + lite5200_fix_port_config(); #ifdef CONFIG_PM mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare; diff --git a/arch/powerpc/platforms/52xx/mpc5200_simple.c b/arch/powerpc/platforms/52xx/mpc5200_simple.c index 754aa932f59..c48b82bc2aa 100644 --- a/arch/powerpc/platforms/52xx/mpc5200_simple.c +++ b/arch/powerpc/platforms/52xx/mpc5200_simple.c @@ -39,12 +39,12 @@ static void __init mpc5200_simple_setup_arch(void) if (ppc_md.progress) ppc_md.progress("mpc5200_simple_setup_arch()", 0); + /* Map important registers from the internal memory map */ + mpc52xx_map_common_devices(); + /* Some mpc5200 & mpc5200b related configuration */ mpc5200_setup_xlb_arbiter(); - /* Map wdt for mpc52xx_restart() */ - mpc52xx_map_wdt(); - mpc52xx_setup_pci(); } diff --git a/arch/powerpc/platforms/52xx/mpc52xx_common.c b/arch/powerpc/platforms/52xx/mpc52xx_common.c index 744eb3a34ec..9aa4425d80b 100644 --- a/arch/powerpc/platforms/52xx/mpc52xx_common.c +++ b/arch/powerpc/platforms/52xx/mpc52xx_common.c @@ -13,6 +13,7 @@ #undef DEBUG #include <linux/kernel.h> +#include <linux/spinlock.h> #include <linux/of_platform.h> #include <asm/io.h> #include <asm/prom.h> @@ -41,7 +42,9 @@ static struct of_device_id mpc52xx_bus_ids[] __initdata = { * from interrupt context while node mapping (which calls ioremap()) * cannot be used at such point. */ -static volatile struct mpc52xx_gpt *mpc52xx_wdt = NULL; +static spinlock_t mpc52xx_lock = SPIN_LOCK_UNLOCKED; +static struct mpc52xx_gpt __iomem *mpc52xx_wdt; +static struct mpc52xx_cdm __iomem *mpc52xx_cdm; /** * mpc52xx_find_ipb_freq - Find the IPB bus frequency for a device @@ -120,18 +123,27 @@ mpc52xx_declare_of_platform_devices(void) } /* - * match tables used by mpc52xx_map_wdt() + * match tables used by mpc52xx_map_common_devices() */ static struct of_device_id mpc52xx_gpt_ids[] __initdata = { { .compatible = "fsl,mpc5200-gpt", }, { .compatible = "mpc5200-gpt", }, /* old */ {} }; +static struct of_device_id mpc52xx_cdm_ids[] __initdata = { + { .compatible = "fsl,mpc5200-cdm", }, + { .compatible = "mpc5200-cdm", }, /* old */ + {} +}; +/** + * mpc52xx_map_common_devices: iomap devices required by common code + */ void __init -mpc52xx_map_wdt(void) +mpc52xx_map_common_devices(void) { struct device_node *np; + /* mpc52xx_wdt is mapped here and used in mpc52xx_restart, * possibly from a interrupt context. wdt is only implement * on a gpt0, so check has-wdt property before mapping. @@ -141,11 +153,56 @@ mpc52xx_map_wdt(void) of_get_property(np, "has-wdt", NULL)) { mpc52xx_wdt = of_iomap(np, 0); of_node_put(np); - return; + break; } } + + /* Clock Distribution Module, used by PSC clock setting function */ + np = of_find_matching_node(NULL, mpc52xx_cdm_ids); + mpc52xx_cdm = of_iomap(np, 0); + of_node_put(np); } +/** + * mpc52xx_set_psc_clkdiv: Set clock divider in the CDM for PSC ports + * + * @psc_id: id of psc port; must be 1,2,3 or 6 + * @clkdiv: clock divider value to put into CDM PSC register. + */ +int mpc52xx_set_psc_clkdiv(int psc_id, int clkdiv) +{ + unsigned long flags; + u16 __iomem *reg; + u32 val; + u32 mask; + u32 mclken_div; + + if (!mpc52xx_cdm) + return -ENODEV; + + mclken_div = 0x8000 | (clkdiv & 0x1FF); + switch (psc_id) { + case 1: reg = &mpc52xx_cdm->mclken_div_psc1; mask = 0x20; break; + case 2: reg = &mpc52xx_cdm->mclken_div_psc2; mask = 0x40; break; + case 3: reg = &mpc52xx_cdm->mclken_div_psc3; mask = 0x80; break; + case 6: reg = &mpc52xx_cdm->mclken_div_psc6; mask = 0x10; break; + default: + return -ENODEV; + } + + /* Set the rate and enable the clock */ + spin_lock_irqsave(&mpc52xx_lock, flags); + out_be16(reg, mclken_div); + val = in_be32(&mpc52xx_cdm->clk_enables); + out_be32(&mpc52xx_cdm->clk_enables, val | mask); + spin_unlock_irqrestore(&mpc52xx_lock, flags); + + return 0; +} + +/** + * mpc52xx_restart: ppc_md->restart hook for mpc5200 using the watchdog timer + */ void mpc52xx_restart(char *cmd) { diff --git a/arch/ppc/syslib/mpc52xx_setup.c b/arch/ppc/syslib/mpc52xx_setup.c index ecfa2c0f8ba..9f504fc7693 100644 --- a/arch/ppc/syslib/mpc52xx_setup.c +++ b/arch/ppc/syslib/mpc52xx_setup.c @@ -16,6 +16,7 @@ */ +#include <linux/spinlock.h> #include <asm/io.h> #include <asm/time.h> #include <asm/mpc52xx.h> @@ -275,3 +276,38 @@ int mpc52xx_match_psc_function(int psc_idx, const char *func) return 0; } + +int mpc52xx_set_psc_clkdiv(int psc_id, int clkdiv) +{ + static spinlock_t lock = SPIN_LOCK_UNLOCKED; + struct mpc52xx_cdm __iomem *cdm; + unsigned long flags; + u16 mclken_div; + u16 __iomem *reg; + u32 mask; + + cdm = ioremap(MPC52xx_PA(MPC52xx_CDM_OFFSET), MPC52xx_CDM_SIZE); + if (!cdm) { + printk(KERN_ERR __FILE__ ": Error mapping CDM\n"); + return -ENODEV; + } + + mclken_div = 0x8000 | (clkdiv & 0x1FF); + switch (psc_id) { + case 1: reg = &cdm->mclken_div_psc1; mask = 0x20; break; + case 2: reg = &cdm->mclken_div_psc2; mask = 0x40; break; + case 3: reg = &cdm->mclken_div_psc3; mask = 0x80; break; + case 6: reg = &cdm->mclken_div_psc6; mask = 0x10; break; + default: + return -ENODEV; + } + + /* Set the rate and enable the clock */ + spin_lock_irqsave(&lock, flags); + out_be16(reg, mclken_div); + out_be32(&cdm->clk_enables, in_be32(&cdm->clk_enables) | mask); + spin_unlock_irqrestore(&lock, flags); + + iounmap(cdm); + return 0; +} |