mfd: tc6393 cleanup and update

This patchset cleans up the TC6393XB support.

* Add provision for the MMC subdevice
* Disable / enable clocks on suspend / resume
* Remove fragments of badly merged code (eg. linux/fb include etc.)
* Use a device specific clock name to break dependancy on ARM/PXA2XX
* Drop unnecessary resource names
* Switch to tmio_io* accessors

Signed-off-by: Ian Molton <spyro@f2s.com>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>

1 files changed, 93 insertions, 63 deletions

diff --git a/drivers/mfd/tc6393xb.c b/drivers/mfd/tc6393xb.c
index 81e2605ea10d..e4c1c788b5f8 100644
--- a/drivers/mfd/tc6393xb.c
+++ b/drivers/mfd/tc6393xb.c
@@ -19,8 +19,8 @@
 #include <linux/io.h>
 #include <linux/irq.h>
 #include <linux/platform_device.h>
-#include <linux/fb.h>
 #include <linux/clk.h>
+#include <linux/err.h>
 #include <linux/mfd/core.h>
 #include <linux/mfd/tmio.h>
 #include <linux/mfd/tc6393xb.h>
@@ -112,6 +112,7 @@ struct tc6393xb {
 
 enum {
         TC6393XB_CELL_NAND,
+        TC6393XB_CELL_MMC,
 };
 
 /*--------------------------------------------------------------------------*/
@@ -126,7 +127,7 @@ static int tc6393xb_nand_enable(struct platform_device *nand)
 
         /* SMD buffer on */
         dev_dbg(&dev->dev, "SMD buffer on\n");
-        iowrite8(0xff, tc6393xb->scr + SCR_GPI_BCR(1));
+        tmio_iowrite8(0xff, tc6393xb->scr + SCR_GPI_BCR(1));
 
         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 
@@ -135,13 +136,13 @@ static int tc6393xb_nand_enable(struct platform_device *nand)
 
 static struct resource __devinitdata tc6393xb_nand_resources[] = {
         {
-                .start  = 0x0100,
-                .end    = 0x01ff,
+                .start  = 0x1000,
+                .end    = 0x1007,
                 .flags  = IORESOURCE_MEM,
         },
         {
-                .start  = 0x1000,
-                .end    = 0x1007,
+                .start  = 0x0100,
+                .end    = 0x01ff,
                 .flags  = IORESOURCE_MEM,
         },
         {
@@ -151,6 +152,24 @@ static struct resource __devinitdata tc6393xb_nand_resources[] = {
         },
 };
 
+static struct resource __devinitdata tc6393xb_mmc_resources[] = {
+        {
+                .start  = 0x800,
+                .end    = 0x9ff,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                .start  = 0x200,
+                .end    = 0x2ff,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                .start  = IRQ_TC6393_MMC,
+                .end    = IRQ_TC6393_MMC,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
 static struct mfd_cell __devinitdata tc6393xb_cells[] = {
         [TC6393XB_CELL_NAND] = {
                 .name = "tmio-nand",
@@ -158,6 +177,11 @@ static struct mfd_cell __devinitdata tc6393xb_cells[] = {
                 .num_resources = ARRAY_SIZE(tc6393xb_nand_resources),
                 .resources = tc6393xb_nand_resources,
         },
+        [TC6393XB_CELL_MMC] = {
+                .name = "tmio-mmc",
+                .num_resources = ARRAY_SIZE(tc6393xb_mmc_resources),
+                .resources = tc6393xb_mmc_resources,
+        },
 };
 
 /*--------------------------------------------------------------------------*/
@@ -168,7 +192,7 @@ static int tc6393xb_gpio_get(struct gpio_chip *chip,
         struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
 
         /* XXX: does dsr also represent inputs? */
-        return ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8))
+        return tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8))
                 & TC_GPIO_BIT(offset);
 }
 
@@ -178,13 +202,13 @@ static void __tc6393xb_gpio_set(struct gpio_chip *chip,
         struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
         u8  dsr;
 
-        dsr = ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8));
+        dsr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8));
         if (value)
                 dsr |= TC_GPIO_BIT(offset);
         else
                 dsr &= ~TC_GPIO_BIT(offset);
 
-        iowrite8(dsr, tc6393xb->scr + SCR_GPO_DSR(offset / 8));
+        tmio_iowrite8(dsr, tc6393xb->scr + SCR_GPO_DSR(offset / 8));
 }
 
 static void tc6393xb_gpio_set(struct gpio_chip *chip,
@@ -209,9 +233,9 @@ static int tc6393xb_gpio_direction_input(struct gpio_chip *chip,
 
         spin_lock_irqsave(&tc6393xb->lock, flags);
 
-        doecr = ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
+        doecr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
         doecr &= ~TC_GPIO_BIT(offset);
-        iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
+        tmio_iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
 
         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 
@@ -229,9 +253,9 @@ static int tc6393xb_gpio_direction_output(struct gpio_chip *chip,
 
         __tc6393xb_gpio_set(chip, offset, value);
 
-        doecr = ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
+        doecr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
         doecr |= TC_GPIO_BIT(offset);
-        iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
+        tmio_iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
 
         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 
@@ -262,8 +286,8 @@ tc6393xb_irq(unsigned int irq, struct irq_desc *desc)
 
         irq_base = tc6393xb->irq_base;
 
-        while ((isr = ioread8(tc6393xb->scr + SCR_ISR) &
-                                ~ioread8(tc6393xb->scr + SCR_IMR)))
+        while ((isr = tmio_ioread8(tc6393xb->scr + SCR_ISR) &
+                                ~tmio_ioread8(tc6393xb->scr + SCR_IMR)))
                 for (i = 0; i < TC6393XB_NR_IRQS; i++) {
                         if (isr & (1 << i))
                                 generic_handle_irq(irq_base + i);
@@ -281,9 +305,9 @@ static void tc6393xb_irq_mask(unsigned int irq)
         u8 imr;
 
         spin_lock_irqsave(&tc6393xb->lock, flags);
-        imr = ioread8(tc6393xb->scr + SCR_IMR);
+        imr = tmio_ioread8(tc6393xb->scr + SCR_IMR);
         imr |= 1 << (irq - tc6393xb->irq_base);
-        iowrite8(imr, tc6393xb->scr + SCR_IMR);
+        tmio_iowrite8(imr, tc6393xb->scr + SCR_IMR);
         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 }
 
@@ -294,9 +318,9 @@ static void tc6393xb_irq_unmask(unsigned int irq)
         u8 imr;
 
         spin_lock_irqsave(&tc6393xb->lock, flags);
-        imr = ioread8(tc6393xb->scr + SCR_IMR);
+        imr = tmio_ioread8(tc6393xb->scr + SCR_IMR);
         imr &= ~(1 << (irq - tc6393xb->irq_base));
-        iowrite8(imr, tc6393xb->scr + SCR_IMR);
+        tmio_iowrite8(imr, tc6393xb->scr + SCR_IMR);
         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 }
 
@@ -377,9 +401,8 @@ static int __devinit tc6393xb_probe(struct platform_device *dev)
 {
         struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
         struct tc6393xb *tc6393xb;
-        struct resource *iomem;
-        struct resource *rscr;
-        int retval, temp;
+        struct resource *iomem, *rscr;
+        int ret, temp;
         int i;
 
         iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
@@ -388,20 +411,26 @@ static int __devinit tc6393xb_probe(struct platform_device *dev)
 
         tc6393xb = kzalloc(sizeof *tc6393xb, GFP_KERNEL);
         if (!tc6393xb) {
-                retval = -ENOMEM;
+                ret = -ENOMEM;
                 goto err_kzalloc;
         }
 
         spin_lock_init(&tc6393xb->lock);
 
         platform_set_drvdata(dev, tc6393xb);
+
+        ret = platform_get_irq(dev, 0);
+        if (ret >= 0)
+                tc6393xb->irq = ret;
+        else
+                goto err_noirq;
+
         tc6393xb->iomem = iomem;
-        tc6393xb->irq = platform_get_irq(dev, 0);
         tc6393xb->irq_base = tcpd->irq_base;
 
-        tc6393xb->clk = clk_get(&dev->dev, "GPIO27_CLK" /* "CK3P6MI" */);
+        tc6393xb->clk = clk_get(&dev->dev, "CLK_CK3P6MI");
         if (IS_ERR(tc6393xb->clk)) {
-                retval = PTR_ERR(tc6393xb->clk);
+                ret = PTR_ERR(tc6393xb->clk);
                 goto err_clk_get;
         }
 
@@ -411,71 +440,73 @@ static int __devinit tc6393xb_probe(struct platform_device *dev)
         rscr->end = iomem->start + 0xff;
         rscr->flags = IORESOURCE_MEM;
 
-        retval = request_resource(iomem, rscr);
-        if (retval)
+        ret = request_resource(iomem, rscr);
+        if (ret)
                 goto err_request_scr;
 
         tc6393xb->scr = ioremap(rscr->start, rscr->end - rscr->start + 1);
         if (!tc6393xb->scr) {
-                retval = -ENOMEM;
+                ret = -ENOMEM;
                 goto err_ioremap;
         }
 
-        retval = clk_enable(tc6393xb->clk);
-        if (retval)
+        ret = clk_enable(tc6393xb->clk);
+        if (ret)
                 goto err_clk_enable;
 
-        retval = tcpd->enable(dev);
-        if (retval)
+        ret = tcpd->enable(dev);
+        if (ret)
                 goto err_enable;
 
         tc6393xb->suspend_state.fer = 0;
+
         for (i = 0; i < 3; i++) {
                 tc6393xb->suspend_state.gpo_dsr[i] =
                         (tcpd->scr_gpo_dsr >> (8 * i)) & 0xff;
                 tc6393xb->suspend_state.gpo_doecr[i] =
                         (tcpd->scr_gpo_doecr >> (8 * i)) & 0xff;
         }
-        /*
-         * It may be necessary to change this back to
-         * platform-dependant code
-         */
+
         tc6393xb->suspend_state.ccr = SCR_CCR_UNK1 |
                                         SCR_CCR_HCLK_48;
 
-        retval = tc6393xb_hw_init(dev);
-        if (retval)
+        ret = tc6393xb_hw_init(dev);
+        if (ret)
                 goto err_hw_init;
 
         printk(KERN_INFO "Toshiba tc6393xb revision %d at 0x%08lx, irq %d\n",
-                        ioread8(tc6393xb->scr + SCR_REVID),
+                        tmio_ioread8(tc6393xb->scr + SCR_REVID),
                         (unsigned long) iomem->start, tc6393xb->irq);
 
         tc6393xb->gpio.base = -1;
 
         if (tcpd->gpio_base >= 0) {
-                retval = tc6393xb_register_gpio(tc6393xb, tcpd->gpio_base);
-                if (retval)
+                ret = tc6393xb_register_gpio(tc6393xb, tcpd->gpio_base);
+                if (ret)
                         goto err_gpio_add;
         }
 
-        if (tc6393xb->irq)
-                tc6393xb_attach_irq(dev);
+        tc6393xb_attach_irq(dev);
 
         tc6393xb_cells[TC6393XB_CELL_NAND].driver_data = tcpd->nand_data;
         tc6393xb_cells[TC6393XB_CELL_NAND].platform_data =
                 &tc6393xb_cells[TC6393XB_CELL_NAND];
         tc6393xb_cells[TC6393XB_CELL_NAND].data_size =
                 sizeof(tc6393xb_cells[TC6393XB_CELL_NAND]);
+        tc6393xb_cells[TC6393XB_CELL_MMC].platform_data =
+                &tc6393xb_cells[TC6393XB_CELL_MMC];
+        tc6393xb_cells[TC6393XB_CELL_MMC].data_size =
+                sizeof(tc6393xb_cells[TC6393XB_CELL_MMC]);
+
 
-        retval = mfd_add_devices(&dev->dev, dev->id,
+        ret = mfd_add_devices(&dev->dev, dev->id,
                         tc6393xb_cells, ARRAY_SIZE(tc6393xb_cells),
                         iomem, tcpd->irq_base);
 
-        return 0;
+        if (!ret)
+                return 0;
 
-        if (tc6393xb->irq)
-                tc6393xb_detach_irq(dev);
+        tc6393xb_detach_irq(dev);
 
 err_gpio_add:
         if (tc6393xb->gpio.base != -1)
@@ -490,10 +521,11 @@ err_ioremap:
         release_resource(&tc6393xb->rscr);
 err_request_scr:
         clk_put(tc6393xb->clk);
+err_noirq:
 err_clk_get:
         kfree(tc6393xb);
 err_kzalloc:
-        return retval;
+        return ret;
 }
 
 static int __devexit tc6393xb_remove(struct platform_device *dev)
@@ -503,9 +535,7 @@ static int __devexit tc6393xb_remove(struct platform_device *dev)
         int ret;
 
         mfd_remove_devices(&dev->dev);
-
-        if (tc6393xb->irq)
-                tc6393xb_detach_irq(dev);
+        tc6393xb_detach_irq(dev);
 
         if (tc6393xb->gpio.base != -1) {
                 ret = gpiochip_remove(&tc6393xb->gpio);
@@ -516,17 +546,11 @@ static int __devexit tc6393xb_remove(struct platform_device *dev)
         }
 
         ret = tcpd->disable(dev);
-
         clk_disable(tc6393xb->clk);
-
         iounmap(tc6393xb->scr);
-
         release_resource(&tc6393xb->rscr);
-
         platform_set_drvdata(dev, NULL);
-
         clk_put(tc6393xb->clk);
-
         kfree(tc6393xb);
 
         return ret;
@@ -537,8 +561,7 @@ static int tc6393xb_suspend(struct platform_device *dev, pm_message_t state)
 {
         struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
-        int i;
-
+        int i, ret;
 
         tc6393xb->suspend_state.ccr = ioread16(tc6393xb->scr + SCR_CCR);
         tc6393xb->suspend_state.fer = ioread8(tc6393xb->scr + SCR_FER);
@@ -551,14 +574,21 @@ static int tc6393xb_suspend(struct platform_device *dev, pm_message_t state)
                 tc6393xb->suspend_state.gpi_bcr[i] =
                         ioread8(tc6393xb->scr + SCR_GPI_BCR(i));
         }
+        ret = tcpd->suspend(dev);
+        clk_disable(tc6393xb->clk);
 
-        return tcpd->suspend(dev);
+        return ret;
 }
 
 static int tc6393xb_resume(struct platform_device *dev)
 {
         struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
-        int ret = tcpd->resume(dev);
+        struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
+        int ret;
+
+        clk_enable(tc6393xb->clk);
+
+        ret = tcpd->resume(dev);
 
         if (ret)
                 return ret;
@@ -595,7 +625,7 @@ static void __exit tc6393xb_exit(void)
 subsys_initcall(tc6393xb_init);
 module_exit(tc6393xb_exit);
 
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov and Dirk Opfer");
 MODULE_DESCRIPTION("tc6393xb Toshiba Mobile IO Controller");
 MODULE_ALIAS("platform:tc6393xb");