11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * linux/arch/arm/mach-sa1100/neponset.c 31da177e4SLinus Torvalds */ 49590e898SRussell King #include <linux/err.h> 51da177e4SLinus Torvalds #include <linux/init.h> 61da177e4SLinus Torvalds #include <linux/ioport.h> 7ced8d21cSRussell King #include <linux/irq.h> 892e617d9SRussell King #include <linux/kernel.h> 9ae14c2e2SRussell King #include <linux/module.h> 106920b5a7SRussell King #include <linux/platform_data/sa11x0-serial.h> 11d052d1beSRussell King #include <linux/platform_device.h> 1251f93390SRussell King #include <linux/pm.h> 1392e617d9SRussell King #include <linux/serial_core.h> 14ae14c2e2SRussell King #include <linux/slab.h> 15b70661c7SArnd Bergmann #include <linux/smc91x.h> 161da177e4SLinus Torvalds 171da177e4SLinus Torvalds #include <asm/mach-types.h> 181da177e4SLinus Torvalds #include <asm/mach/map.h> 191da177e4SLinus Torvalds #include <asm/hardware/sa1111.h> 201da177e4SLinus Torvalds #include <asm/sizes.h> 211da177e4SLinus Torvalds 2292e617d9SRussell King #include <mach/hardware.h> 2392e617d9SRussell King #include <mach/assabet.h> 2492e617d9SRussell King #include <mach/neponset.h> 25f314f33bSRob Herring #include <mach/irqs.h> 2692e617d9SRussell King 27ced8d21cSRussell King #define NEP_IRQ_SMC91X 0 28ced8d21cSRussell King #define NEP_IRQ_USAR 1 29ced8d21cSRussell King #define NEP_IRQ_SA1111 2 30ced8d21cSRussell King #define NEP_IRQ_NR 3 31ced8d21cSRussell King 32f942b0fdSRussell King #define WHOAMI 0x00 33f942b0fdSRussell King #define LEDS 0x10 34f942b0fdSRussell King #define SWPK 0x20 35f942b0fdSRussell King #define IRR 0x24 36f942b0fdSRussell King #define KP_Y_IN 0x80 37f942b0fdSRussell King #define KP_X_OUT 0x90 38f942b0fdSRussell King #define NCR_0 0xa0 39f942b0fdSRussell King #define MDM_CTL_0 0xb0 40f942b0fdSRussell King #define MDM_CTL_1 0xb4 41f942b0fdSRussell King #define AUD_CTL 0xc0 42f942b0fdSRussell King 43f942b0fdSRussell King #define IRR_ETHERNET (1 << 0) 44f942b0fdSRussell King #define IRR_USAR (1 << 1) 45f942b0fdSRussell King #define IRR_SA1111 (1 << 2) 46f942b0fdSRussell King 47f942b0fdSRussell King #define MDM_CTL0_RTS1 (1 << 0) 48f942b0fdSRussell King #define MDM_CTL0_DTR1 (1 << 1) 49f942b0fdSRussell King #define MDM_CTL0_RTS2 (1 << 2) 50f942b0fdSRussell King #define MDM_CTL0_DTR2 (1 << 3) 51f942b0fdSRussell King 52f942b0fdSRussell King #define MDM_CTL1_CTS1 (1 << 0) 53f942b0fdSRussell King #define MDM_CTL1_DSR1 (1 << 1) 54f942b0fdSRussell King #define MDM_CTL1_DCD1 (1 << 2) 55f942b0fdSRussell King #define MDM_CTL1_CTS2 (1 << 3) 56f942b0fdSRussell King #define MDM_CTL1_DSR2 (1 << 4) 57f942b0fdSRussell King #define MDM_CTL1_DCD2 (1 << 5) 58f942b0fdSRussell King 59f942b0fdSRussell King #define AUD_SEL_1341 (1 << 0) 60f942b0fdSRussell King #define AUD_MUTE_1341 (1 << 1) 61f942b0fdSRussell King 62bab50a35SRussell King extern void sa1110_mb_disable(void); 63bab50a35SRussell King 64ae14c2e2SRussell King struct neponset_drvdata { 65f942b0fdSRussell King void __iomem *base; 669590e898SRussell King struct platform_device *sa1111; 679590e898SRussell King struct platform_device *smc91x; 68ced8d21cSRussell King unsigned irq_base; 69ae14c2e2SRussell King #ifdef CONFIG_PM_SLEEP 70ae14c2e2SRussell King u32 ncr0; 71ae14c2e2SRussell King u32 mdm_ctl_0; 72ae14c2e2SRussell King #endif 73ae14c2e2SRussell King }; 74ae14c2e2SRussell King 75f942b0fdSRussell King static void __iomem *nep_base; 76f942b0fdSRussell King 776ad1b614SRussell King void neponset_ncr_frob(unsigned int mask, unsigned int val) 786ad1b614SRussell King { 79f942b0fdSRussell King void __iomem *base = nep_base; 80f942b0fdSRussell King 81f942b0fdSRussell King if (base) { 826ad1b614SRussell King unsigned long flags; 83f942b0fdSRussell King unsigned v; 846ad1b614SRussell King 856ad1b614SRussell King local_irq_save(flags); 86f942b0fdSRussell King v = readb_relaxed(base + NCR_0); 87f942b0fdSRussell King writeb_relaxed((v & ~mask) | val, base + NCR_0); 886ad1b614SRussell King local_irq_restore(flags); 89f942b0fdSRussell King } else { 90f942b0fdSRussell King WARN(1, "nep_base unset\n"); 91f942b0fdSRussell King } 926ad1b614SRussell King } 93ef0c1484SRussell King EXPORT_SYMBOL(neponset_ncr_frob); 946ad1b614SRussell King 951da177e4SLinus Torvalds static void neponset_set_mctrl(struct uart_port *port, u_int mctrl) 961da177e4SLinus Torvalds { 97f942b0fdSRussell King void __iomem *base = nep_base; 98f942b0fdSRussell King u_int mdm_ctl0; 991da177e4SLinus Torvalds 100f942b0fdSRussell King if (!base) 101f942b0fdSRussell King return; 102f942b0fdSRussell King 103f942b0fdSRussell King mdm_ctl0 = readb_relaxed(base + MDM_CTL_0); 1041da177e4SLinus Torvalds if (port->mapbase == _Ser1UTCR0) { 1051da177e4SLinus Torvalds if (mctrl & TIOCM_RTS) 1061da177e4SLinus Torvalds mdm_ctl0 &= ~MDM_CTL0_RTS2; 1071da177e4SLinus Torvalds else 1081da177e4SLinus Torvalds mdm_ctl0 |= MDM_CTL0_RTS2; 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvalds if (mctrl & TIOCM_DTR) 1111da177e4SLinus Torvalds mdm_ctl0 &= ~MDM_CTL0_DTR2; 1121da177e4SLinus Torvalds else 1131da177e4SLinus Torvalds mdm_ctl0 |= MDM_CTL0_DTR2; 1141da177e4SLinus Torvalds } else if (port->mapbase == _Ser3UTCR0) { 1151da177e4SLinus Torvalds if (mctrl & TIOCM_RTS) 1161da177e4SLinus Torvalds mdm_ctl0 &= ~MDM_CTL0_RTS1; 1171da177e4SLinus Torvalds else 1181da177e4SLinus Torvalds mdm_ctl0 |= MDM_CTL0_RTS1; 1191da177e4SLinus Torvalds 1201da177e4SLinus Torvalds if (mctrl & TIOCM_DTR) 1211da177e4SLinus Torvalds mdm_ctl0 &= ~MDM_CTL0_DTR1; 1221da177e4SLinus Torvalds else 1231da177e4SLinus Torvalds mdm_ctl0 |= MDM_CTL0_DTR1; 1241da177e4SLinus Torvalds } 1251da177e4SLinus Torvalds 126f942b0fdSRussell King writeb_relaxed(mdm_ctl0, base + MDM_CTL_0); 1271da177e4SLinus Torvalds } 1281da177e4SLinus Torvalds 1291da177e4SLinus Torvalds static u_int neponset_get_mctrl(struct uart_port *port) 1301da177e4SLinus Torvalds { 131f942b0fdSRussell King void __iomem *base = nep_base; 1321da177e4SLinus Torvalds u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR; 133f942b0fdSRussell King u_int mdm_ctl1; 1341da177e4SLinus Torvalds 135f942b0fdSRussell King if (!base) 136f942b0fdSRussell King return ret; 137f942b0fdSRussell King 138f942b0fdSRussell King mdm_ctl1 = readb_relaxed(base + MDM_CTL_1); 1391da177e4SLinus Torvalds if (port->mapbase == _Ser1UTCR0) { 1401da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_DCD2) 1411da177e4SLinus Torvalds ret &= ~TIOCM_CD; 1421da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_CTS2) 1431da177e4SLinus Torvalds ret &= ~TIOCM_CTS; 1441da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_DSR2) 1451da177e4SLinus Torvalds ret &= ~TIOCM_DSR; 1461da177e4SLinus Torvalds } else if (port->mapbase == _Ser3UTCR0) { 1471da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_DCD1) 1481da177e4SLinus Torvalds ret &= ~TIOCM_CD; 1491da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_CTS1) 1501da177e4SLinus Torvalds ret &= ~TIOCM_CTS; 1511da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_DSR1) 1521da177e4SLinus Torvalds ret &= ~TIOCM_DSR; 1531da177e4SLinus Torvalds } 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvalds return ret; 1561da177e4SLinus Torvalds } 1571da177e4SLinus Torvalds 158351a102dSGreg Kroah-Hartman static struct sa1100_port_fns neponset_port_fns = { 1591da177e4SLinus Torvalds .set_mctrl = neponset_set_mctrl, 1601da177e4SLinus Torvalds .get_mctrl = neponset_get_mctrl, 1611da177e4SLinus Torvalds }; 1621da177e4SLinus Torvalds 16371045520SRussell King /* 16492e617d9SRussell King * Install handler for Neponset IRQ. Note that we have to loop here 16592e617d9SRussell King * since the ETHERNET and USAR IRQs are level based, and we need to 16692e617d9SRussell King * ensure that the IRQ signal is deasserted before returning. This 16792e617d9SRussell King * is rather unfortunate. 16892e617d9SRussell King */ 169ced8d21cSRussell King static void neponset_irq_handler(unsigned int irq, struct irq_desc *desc) 17092e617d9SRussell King { 171ced8d21cSRussell King struct neponset_drvdata *d = irq_desc_get_handler_data(desc); 17292e617d9SRussell King unsigned int irr; 17392e617d9SRussell King 17492e617d9SRussell King while (1) { 17592e617d9SRussell King /* 17692e617d9SRussell King * Acknowledge the parent IRQ. 17792e617d9SRussell King */ 17892e617d9SRussell King desc->irq_data.chip->irq_ack(&desc->irq_data); 17992e617d9SRussell King 18092e617d9SRussell King /* 18192e617d9SRussell King * Read the interrupt reason register. Let's have all 18292e617d9SRussell King * active IRQ bits high. Note: there is a typo in the 18392e617d9SRussell King * Neponset user's guide for the SA1111 IRR level. 18492e617d9SRussell King */ 185f942b0fdSRussell King irr = readb_relaxed(d->base + IRR); 186f942b0fdSRussell King irr ^= IRR_ETHERNET | IRR_USAR; 18792e617d9SRussell King 18892e617d9SRussell King if ((irr & (IRR_ETHERNET | IRR_USAR | IRR_SA1111)) == 0) 18992e617d9SRussell King break; 19092e617d9SRussell King 19192e617d9SRussell King /* 19292e617d9SRussell King * Since there is no individual mask, we have to 19392e617d9SRussell King * mask the parent IRQ. This is safe, since we'll 19492e617d9SRussell King * recheck the register for any pending IRQs. 19592e617d9SRussell King */ 19692e617d9SRussell King if (irr & (IRR_ETHERNET | IRR_USAR)) { 19792e617d9SRussell King desc->irq_data.chip->irq_mask(&desc->irq_data); 19892e617d9SRussell King 19992e617d9SRussell King /* 20092e617d9SRussell King * Ack the interrupt now to prevent re-entering 20192e617d9SRussell King * this neponset handler. Again, this is safe 20292e617d9SRussell King * since we'll check the IRR register prior to 20392e617d9SRussell King * leaving. 20492e617d9SRussell King */ 20592e617d9SRussell King desc->irq_data.chip->irq_ack(&desc->irq_data); 20692e617d9SRussell King 207ced8d21cSRussell King if (irr & IRR_ETHERNET) 208ced8d21cSRussell King generic_handle_irq(d->irq_base + NEP_IRQ_SMC91X); 20992e617d9SRussell King 210ced8d21cSRussell King if (irr & IRR_USAR) 211ced8d21cSRussell King generic_handle_irq(d->irq_base + NEP_IRQ_USAR); 21292e617d9SRussell King 21392e617d9SRussell King desc->irq_data.chip->irq_unmask(&desc->irq_data); 21492e617d9SRussell King } 21592e617d9SRussell King 216ced8d21cSRussell King if (irr & IRR_SA1111) 217ced8d21cSRussell King generic_handle_irq(d->irq_base + NEP_IRQ_SA1111); 21892e617d9SRussell King } 21992e617d9SRussell King } 22092e617d9SRussell King 221ced8d21cSRussell King /* Yes, we really do not have any kind of masking or unmasking */ 22271045520SRussell King static void nochip_noop(struct irq_data *irq) 22371045520SRussell King { 22471045520SRussell King } 22571045520SRussell King 22671045520SRussell King static struct irq_chip nochip = { 22771045520SRussell King .name = "neponset", 22871045520SRussell King .irq_ack = nochip_noop, 22971045520SRussell King .irq_mask = nochip_noop, 23071045520SRussell King .irq_unmask = nochip_noop, 23171045520SRussell King }; 23271045520SRussell King 23392e617d9SRussell King static struct sa1111_platform_data sa1111_info = { 23407be45f5SRussell King .disable_devs = SA1111_DEVID_PS2_MSE, 23592e617d9SRussell King }; 23692e617d9SRussell King 237351a102dSGreg Kroah-Hartman static int neponset_probe(struct platform_device *dev) 2381da177e4SLinus Torvalds { 239ae14c2e2SRussell King struct neponset_drvdata *d; 240f942b0fdSRussell King struct resource *nep_res, *sa1111_res, *smc91x_res; 241ced8d21cSRussell King struct resource sa1111_resources[] = { 242ced8d21cSRussell King DEFINE_RES_MEM(0x40000000, SZ_8K), 243ced8d21cSRussell King { .flags = IORESOURCE_IRQ }, 244ced8d21cSRussell King }; 2459590e898SRussell King struct platform_device_info sa1111_devinfo = { 2469590e898SRussell King .parent = &dev->dev, 2479590e898SRussell King .name = "sa1111", 2489590e898SRussell King .id = 0, 2499590e898SRussell King .res = sa1111_resources, 2509590e898SRussell King .num_res = ARRAY_SIZE(sa1111_resources), 2519590e898SRussell King .data = &sa1111_info, 2529590e898SRussell King .size_data = sizeof(sa1111_info), 2539590e898SRussell King .dma_mask = 0xffffffffUL, 2549590e898SRussell King }; 255ced8d21cSRussell King struct resource smc91x_resources[] = { 256ced8d21cSRussell King DEFINE_RES_MEM_NAMED(SA1100_CS3_PHYS, 257ced8d21cSRussell King 0x02000000, "smc91x-regs"), 258ced8d21cSRussell King DEFINE_RES_MEM_NAMED(SA1100_CS3_PHYS + 0x02000000, 259ced8d21cSRussell King 0x02000000, "smc91x-attrib"), 260ced8d21cSRussell King { .flags = IORESOURCE_IRQ }, 261ced8d21cSRussell King }; 262b70661c7SArnd Bergmann struct smc91x_platdata smc91x_platdata = { 263b70661c7SArnd Bergmann .flags = SMC91X_USE_8BIT | SMC91X_IO_SHIFT_2 | SMC91X_NOWAIT, 264b70661c7SArnd Bergmann }; 2659590e898SRussell King struct platform_device_info smc91x_devinfo = { 2669590e898SRussell King .parent = &dev->dev, 2679590e898SRussell King .name = "smc91x", 2689590e898SRussell King .id = 0, 2699590e898SRussell King .res = smc91x_resources, 2709590e898SRussell King .num_res = ARRAY_SIZE(smc91x_resources), 271b70661c7SArnd Bergmann .data = &smc91c_platdata, 272b70661c7SArnd Bergmann .size_data = sizeof(smc91c_platdata), 2739590e898SRussell King }; 274b6bdfcf5SRussell King int ret, irq; 275b6bdfcf5SRussell King 276f942b0fdSRussell King if (nep_base) 277f942b0fdSRussell King return -EBUSY; 278f942b0fdSRussell King 279b6bdfcf5SRussell King irq = ret = platform_get_irq(dev, 0); 280b6bdfcf5SRussell King if (ret < 0) 281b6bdfcf5SRussell King goto err_alloc; 282ae14c2e2SRussell King 283f942b0fdSRussell King nep_res = platform_get_resource(dev, IORESOURCE_MEM, 0); 284d2e539a5SRussell King smc91x_res = platform_get_resource(dev, IORESOURCE_MEM, 1); 285d2e539a5SRussell King sa1111_res = platform_get_resource(dev, IORESOURCE_MEM, 2); 286f942b0fdSRussell King if (!nep_res || !smc91x_res || !sa1111_res) { 287d2e539a5SRussell King ret = -ENXIO; 288d2e539a5SRussell King goto err_alloc; 289d2e539a5SRussell King } 290d2e539a5SRussell King 291ae14c2e2SRussell King d = kzalloc(sizeof(*d), GFP_KERNEL); 292ae14c2e2SRussell King if (!d) { 293ae14c2e2SRussell King ret = -ENOMEM; 294ae14c2e2SRussell King goto err_alloc; 295ae14c2e2SRussell King } 296ae14c2e2SRussell King 297f942b0fdSRussell King d->base = ioremap(nep_res->start, SZ_4K); 298f942b0fdSRussell King if (!d->base) { 299f942b0fdSRussell King ret = -ENOMEM; 300f942b0fdSRussell King goto err_ioremap; 301f942b0fdSRussell King } 302f942b0fdSRussell King 303f942b0fdSRussell King if (readb_relaxed(d->base + WHOAMI) != 0x11) { 304f942b0fdSRussell King dev_warn(&dev->dev, "Neponset board detected, but wrong ID: %02x\n", 305f942b0fdSRussell King readb_relaxed(d->base + WHOAMI)); 306f942b0fdSRussell King ret = -ENODEV; 307f942b0fdSRussell King goto err_id; 308f942b0fdSRussell King } 309f942b0fdSRussell King 310ced8d21cSRussell King ret = irq_alloc_descs(-1, IRQ_BOARD_START, NEP_IRQ_NR, -1); 311ced8d21cSRussell King if (ret <= 0) { 312ced8d21cSRussell King dev_err(&dev->dev, "unable to allocate %u irqs: %d\n", 313ced8d21cSRussell King NEP_IRQ_NR, ret); 314ced8d21cSRussell King if (ret == 0) 315ced8d21cSRussell King ret = -ENOMEM; 316ced8d21cSRussell King goto err_irq_alloc; 317ced8d21cSRussell King } 3181da177e4SLinus Torvalds 319ced8d21cSRussell King d->irq_base = ret; 320ced8d21cSRussell King 321ced8d21cSRussell King irq_set_chip_and_handler(d->irq_base + NEP_IRQ_SMC91X, &nochip, 322ced8d21cSRussell King handle_simple_irq); 323ced8d21cSRussell King set_irq_flags(d->irq_base + NEP_IRQ_SMC91X, IRQF_VALID | IRQF_PROBE); 324ced8d21cSRussell King irq_set_chip_and_handler(d->irq_base + NEP_IRQ_USAR, &nochip, 325ced8d21cSRussell King handle_simple_irq); 326ced8d21cSRussell King set_irq_flags(d->irq_base + NEP_IRQ_USAR, IRQF_VALID | IRQF_PROBE); 327ced8d21cSRussell King irq_set_chip(d->irq_base + NEP_IRQ_SA1111, &nochip); 328ced8d21cSRussell King 329b6bdfcf5SRussell King irq_set_irq_type(irq, IRQ_TYPE_EDGE_RISING); 330b6bdfcf5SRussell King irq_set_handler_data(irq, d); 331b6bdfcf5SRussell King irq_set_chained_handler(irq, neponset_irq_handler); 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvalds /* 334ced8d21cSRussell King * We would set IRQ_GPIO25 to be a wake-up IRQ, but unfortunately 335ced8d21cSRussell King * something on the Neponset activates this IRQ on sleep (eth?) 3361da177e4SLinus Torvalds */ 3371da177e4SLinus Torvalds #if 0 338b6bdfcf5SRussell King enable_irq_wake(irq); 3391da177e4SLinus Torvalds #endif 3401da177e4SLinus Torvalds 341ced8d21cSRussell King dev_info(&dev->dev, "Neponset daughter board, providing IRQ%u-%u\n", 342ced8d21cSRussell King d->irq_base, d->irq_base + NEP_IRQ_NR - 1); 343f942b0fdSRussell King nep_base = d->base; 3441da177e4SLinus Torvalds 345ced8d21cSRussell King sa1100_register_uart_fns(&neponset_port_fns); 346ced8d21cSRussell King 347bab50a35SRussell King /* Ensure that the memory bus request/grant signals are setup */ 348bab50a35SRussell King sa1110_mb_disable(); 349bab50a35SRussell King 350ced8d21cSRussell King /* Disable GPIO 0/1 drivers so the buttons work on the Assabet */ 351f942b0fdSRussell King writeb_relaxed(NCR_GP01_OFF, d->base + NCR_0); 3521da177e4SLinus Torvalds 353d2e539a5SRussell King sa1111_resources[0].parent = sa1111_res; 354ced8d21cSRussell King sa1111_resources[1].start = d->irq_base + NEP_IRQ_SA1111; 355ced8d21cSRussell King sa1111_resources[1].end = d->irq_base + NEP_IRQ_SA1111; 3569590e898SRussell King d->sa1111 = platform_device_register_full(&sa1111_devinfo); 357ced8d21cSRussell King 358d2e539a5SRussell King smc91x_resources[0].parent = smc91x_res; 359d2e539a5SRussell King smc91x_resources[1].parent = smc91x_res; 360ced8d21cSRussell King smc91x_resources[2].start = d->irq_base + NEP_IRQ_SMC91X; 361ced8d21cSRussell King smc91x_resources[2].end = d->irq_base + NEP_IRQ_SMC91X; 3629590e898SRussell King d->smc91x = platform_device_register_full(&smc91x_devinfo); 3639590e898SRussell King 364ae14c2e2SRussell King platform_set_drvdata(dev, d); 365ae14c2e2SRussell King 366ae14c2e2SRussell King return 0; 367ae14c2e2SRussell King 368ced8d21cSRussell King err_irq_alloc: 369f942b0fdSRussell King err_id: 370f942b0fdSRussell King iounmap(d->base); 371f942b0fdSRussell King err_ioremap: 372ced8d21cSRussell King kfree(d); 373ae14c2e2SRussell King err_alloc: 374ae14c2e2SRussell King return ret; 375ae14c2e2SRussell King } 376ae14c2e2SRussell King 377351a102dSGreg Kroah-Hartman static int neponset_remove(struct platform_device *dev) 378ae14c2e2SRussell King { 379ae14c2e2SRussell King struct neponset_drvdata *d = platform_get_drvdata(dev); 380b6bdfcf5SRussell King int irq = platform_get_irq(dev, 0); 381ae14c2e2SRussell King 3829590e898SRussell King if (!IS_ERR(d->sa1111)) 3839590e898SRussell King platform_device_unregister(d->sa1111); 3849590e898SRussell King if (!IS_ERR(d->smc91x)) 3859590e898SRussell King platform_device_unregister(d->smc91x); 386b6bdfcf5SRussell King irq_set_chained_handler(irq, NULL); 387ced8d21cSRussell King irq_free_descs(d->irq_base, NEP_IRQ_NR); 388f942b0fdSRussell King nep_base = NULL; 389f942b0fdSRussell King iounmap(d->base); 390ae14c2e2SRussell King kfree(d); 391ae14c2e2SRussell King 3921da177e4SLinus Torvalds return 0; 3931da177e4SLinus Torvalds } 3941da177e4SLinus Torvalds 39551f93390SRussell King #ifdef CONFIG_PM_SLEEP 39651f93390SRussell King static int neponset_suspend(struct device *dev) 3971da177e4SLinus Torvalds { 39851f93390SRussell King struct neponset_drvdata *d = dev_get_drvdata(dev); 399ae14c2e2SRussell King 400f942b0fdSRussell King d->ncr0 = readb_relaxed(d->base + NCR_0); 401f942b0fdSRussell King d->mdm_ctl_0 = readb_relaxed(d->base + MDM_CTL_0); 4021da177e4SLinus Torvalds 4031da177e4SLinus Torvalds return 0; 4041da177e4SLinus Torvalds } 4051da177e4SLinus Torvalds 40651f93390SRussell King static int neponset_resume(struct device *dev) 4071da177e4SLinus Torvalds { 40851f93390SRussell King struct neponset_drvdata *d = dev_get_drvdata(dev); 409ae14c2e2SRussell King 410f942b0fdSRussell King writeb_relaxed(d->ncr0, d->base + NCR_0); 411f942b0fdSRussell King writeb_relaxed(d->mdm_ctl_0, d->base + MDM_CTL_0); 4121da177e4SLinus Torvalds 4131da177e4SLinus Torvalds return 0; 4141da177e4SLinus Torvalds } 4151da177e4SLinus Torvalds 41651f93390SRussell King static const struct dev_pm_ops neponset_pm_ops = { 41751f93390SRussell King .suspend_noirq = neponset_suspend, 41851f93390SRussell King .resume_noirq = neponset_resume, 41951f93390SRussell King .freeze_noirq = neponset_suspend, 42051f93390SRussell King .restore_noirq = neponset_resume, 42151f93390SRussell King }; 42251f93390SRussell King #define PM_OPS &neponset_pm_ops 4231da177e4SLinus Torvalds #else 42451f93390SRussell King #define PM_OPS NULL 4251da177e4SLinus Torvalds #endif 4261da177e4SLinus Torvalds 4273ae5eaecSRussell King static struct platform_driver neponset_device_driver = { 4281da177e4SLinus Torvalds .probe = neponset_probe, 429351a102dSGreg Kroah-Hartman .remove = neponset_remove, 4303ae5eaecSRussell King .driver = { 4313ae5eaecSRussell King .name = "neponset", 43251f93390SRussell King .pm = PM_OPS, 4333ae5eaecSRussell King }, 4341da177e4SLinus Torvalds }; 4351da177e4SLinus Torvalds 4361da177e4SLinus Torvalds static int __init neponset_init(void) 4371da177e4SLinus Torvalds { 438bab50a35SRussell King return platform_driver_register(&neponset_device_driver); 4391da177e4SLinus Torvalds } 4401da177e4SLinus Torvalds 4411da177e4SLinus Torvalds subsys_initcall(neponset_init); 442