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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-01-24 23:10:02 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-02-09 16:34:15 +0100 |
| commit | ae14c2e28cd6d78a975dda853d2fdb00a3219c16 (patch) | |
| tree | 6dfb05cb3c7433e3bacfb75a47e0ddcb4b65322f /arch/arm/mach-sa1100 | |
| parent | ARM: sa11x0: neponset: add driver .owner initializer (diff) | |
| download | linux-ae14c2e28cd6d78a975dda853d2fdb00a3219c16.tar.xz linux-ae14c2e28cd6d78a975dda853d2fdb00a3219c16.zip | |
ARM: sa11x0: neponset: save and restore MDM_CTL_0
Save and restore the modem output control register across a suspend/
resume, as well as the NCR register. Place these in a locally
allocated data structure rather than needing a new static variable.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-sa1100')
| -rw-r--r-- | arch/arm/mach-sa1100/neponset.c | 53 |
1 files changed, 42 insertions, 11 deletions
diff --git a/arch/arm/mach-sa1100/neponset.c b/arch/arm/mach-sa1100/neponset.c index 1beaa0e5bf3f..6f0aa91d5d34 100644 --- a/arch/arm/mach-sa1100/neponset.c +++ b/arch/arm/mach-sa1100/neponset.c @@ -1,12 +1,13 @@ /* * linux/arch/arm/mach-sa1100/neponset.c - * */ #include <linux/init.h> #include <linux/ioport.h> #include <linux/kernel.h> +#include <linux/module.h> #include <linux/platform_device.h> #include <linux/serial_core.h> +#include <linux/slab.h> #include <asm/mach-types.h> #include <asm/irq.h> @@ -20,6 +21,13 @@ #include <mach/assabet.h> #include <mach/neponset.h> +struct neponset_drvdata { +#ifdef CONFIG_PM_SLEEP + u32 ncr0; + u32 mdm_ctl_0; +#endif +}; + void neponset_ncr_frob(unsigned int mask, unsigned int val) { unsigned long flags; @@ -200,6 +208,15 @@ static struct platform_device smc91x_device = { static int __devinit neponset_probe(struct platform_device *dev) { + struct neponset_drvdata *d; + int ret; + + d = kzalloc(sizeof(*d), GFP_KERNEL); + if (!d) { + ret = -ENOMEM; + goto err_alloc; + } + sa1100_register_uart_fns(&neponset_port_fns); /* @@ -234,29 +251,42 @@ static int __devinit neponset_probe(struct platform_device *dev) */ NCR_0 = NCR_GP01_OFF; + platform_set_drvdata(dev, d); + return 0; + + err_alloc: + return ret; } -#ifdef CONFIG_PM +static int __devexit neponset_remove(struct platform_device *dev) +{ + struct neponset_drvdata *d = platform_get_drvdata(dev); -/* - * LDM power management. - */ -static unsigned int neponset_saved_state; + irq_set_chained_handler(IRQ_GPIO25, NULL); + + kfree(d); + + return 0; +} +#ifdef CONFIG_PM static int neponset_suspend(struct platform_device *dev, pm_message_t state) { - /* - * Save state. - */ - neponset_saved_state = NCR_0; + struct neponset_drvdata *d = platform_get_drvdata(dev); + + d->ncr0 = NCR_0; + d->mdm_ctl_0 = MDM_CTL_0; return 0; } static int neponset_resume(struct platform_device *dev) { - NCR_0 = neponset_saved_state; + struct neponset_drvdata *d = platform_get_drvdata(dev); + + NCR_0 = d->ncr0; + MDM_CTL_0 = d->mdm_ctl_0; return 0; } @@ -268,6 +298,7 @@ static int neponset_resume(struct platform_device *dev) static struct platform_driver neponset_device_driver = { .probe = neponset_probe, + .remove = __devexit_p(neponset_remove), .suspend = neponset_suspend, .resume = neponset_resume, .driver = { |