From e09b41010ba33a20a87472ee821fa407a5b8da36 Mon Sep 17 00:00:00 2001 From: José Pekkarinen Date: Mon, 11 Apr 2016 10:41:07 +0300 Subject: These changes are the raw update to linux-4.4.6-rt14. Kernel sources are taken from kernel.org, and rt patch from the rt wiki download page. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen --- kernel/drivers/auxdisplay/ks0108.c | 98 +++++++++++++++++++++++--------------- 1 file changed, 60 insertions(+), 38 deletions(-) (limited to 'kernel/drivers/auxdisplay') diff --git a/kernel/drivers/auxdisplay/ks0108.c b/kernel/drivers/auxdisplay/ks0108.c index 0d752851a..816de9eaa 100644 --- a/kernel/drivers/auxdisplay/ks0108.c +++ b/kernel/drivers/auxdisplay/ks0108.c @@ -23,6 +23,8 @@ * */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + #include #include #include @@ -90,17 +92,19 @@ void ks0108_displaystate(unsigned char state) void ks0108_startline(unsigned char startline) { - ks0108_writedata(min(startline,(unsigned char)63) | bit(6) | bit(7)); + ks0108_writedata(min_t(unsigned char, startline, 63) | bit(6) | + bit(7)); } void ks0108_address(unsigned char address) { - ks0108_writedata(min(address,(unsigned char)63) | bit(6)); + ks0108_writedata(min_t(unsigned char, address, 63) | bit(6)); } void ks0108_page(unsigned char page) { - ks0108_writedata(min(page,(unsigned char)7) | bit(3) | bit(4) | bit(5) | bit(7)); + ks0108_writedata(min_t(unsigned char, page, 7) | bit(3) | bit(4) | + bit(5) | bit(7)); } EXPORT_SYMBOL_GPL(ks0108_writedata); @@ -121,53 +125,71 @@ unsigned char ks0108_isinited(void) } EXPORT_SYMBOL_GPL(ks0108_isinited); -/* - * Module Init & Exit - */ - -static int __init ks0108_init(void) +static void ks0108_parport_attach(struct parport *port) { - int result; - int ret = -EINVAL; - - ks0108_parport = parport_find_base(ks0108_port); - if (ks0108_parport == NULL) { - printk(KERN_ERR KS0108_NAME ": ERROR: " - "parport didn't find %i port\n", ks0108_port); - goto none; - } - - ks0108_pardevice = parport_register_device(ks0108_parport, KS0108_NAME, - NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL); - parport_put_port(ks0108_parport); - if (ks0108_pardevice == NULL) { - printk(KERN_ERR KS0108_NAME ": ERROR: " - "parport didn't register new device\n"); - goto none; + struct pardev_cb ks0108_cb; + + if (port->base != ks0108_port) + return; + + memset(&ks0108_cb, 0, sizeof(ks0108_cb)); + ks0108_cb.flags = PARPORT_DEV_EXCL; + ks0108_pardevice = parport_register_dev_model(port, KS0108_NAME, + &ks0108_cb, 0); + if (!ks0108_pardevice) { + pr_err("ERROR: parport didn't register new device\n"); + return; } - - result = parport_claim(ks0108_pardevice); - if (result != 0) { - printk(KERN_ERR KS0108_NAME ": ERROR: " - "can't claim %i parport, maybe in use\n", ks0108_port); - ret = result; - goto registered; + if (parport_claim(ks0108_pardevice)) { + pr_err("could not claim access to parport %i. Aborting.\n", + ks0108_port); + goto err_unreg_device; } + ks0108_parport = port; ks0108_inited = 1; - return 0; + return; -registered: +err_unreg_device: parport_unregister_device(ks0108_pardevice); - -none: - return ret; + ks0108_pardevice = NULL; } -static void __exit ks0108_exit(void) +static void ks0108_parport_detach(struct parport *port) { + if (port->base != ks0108_port) + return; + + if (!ks0108_pardevice) { + pr_err("%s: already unregistered.\n", KS0108_NAME); + return; + } + parport_release(ks0108_pardevice); parport_unregister_device(ks0108_pardevice); + ks0108_pardevice = NULL; + ks0108_parport = NULL; +} + +/* + * Module Init & Exit + */ + +static struct parport_driver ks0108_parport_driver = { + .name = "ks0108", + .match_port = ks0108_parport_attach, + .detach = ks0108_parport_detach, + .devmodel = true, +}; + +static int __init ks0108_init(void) +{ + return parport_register_driver(&ks0108_parport_driver); +} + +static void __exit ks0108_exit(void) +{ + parport_unregister_driver(&ks0108_parport_driver); } module_init(ks0108_init); -- cgit 1.2.3-korg