OMAP: devices: Modify McSPI device to adapt to hwmod framework

Cleans up all base address definitions for omap_mcspi
and adapts the device registration and driver to hwmod framework.
Changes involves:
1) Removing all base address macro defines.
2) Using omap-device layer to register device and utilizing data from
   hwmod data file for base address, dma channel number, Irq_number,
   device attribute(number of chipselect).
3) Appending base address with pdata reg_offset for omap4 boards.
   For omap4 all regs used in driver deviate with reg_offset_macros
   defined with an value of 0x100. So pass this offset through pdata
   and append the same to base address retrieved from hwmod data file
   and we are not mapping *_HL_* regs which are not used in driver.

Signed-off-by: Charulatha V <charu@ti.com>
Signed-off-by: Govindraj.R <govindraj.raja@ti.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Reviewed-by: Partha Basak <p-basak2@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

3 files changed, 72 insertions, 230 deletions

diff --git a/arch/arm/mach-omap2/devices.c b/arch/arm/mach-omap2/devices.c
index e0f0ef952bc9..71f099b85e7c 100644
--- a/arch/arm/mach-omap2/devices.c
+++ b/arch/arm/mach-omap2/devices.c
@@ -15,6 +15,7 @@
 #include <linux/io.h>
 #include <linux/clk.h>
 #include <linux/err.h>
+#include <linux/slab.h>
 
 #include <mach/hardware.h>
 #include <mach/irqs.h>
@@ -279,163 +280,55 @@ static inline void omap_init_audio(void) {}
 
 #include <plat/mcspi.h>
 
-#define OMAP2_MCSPI1_BASE               0x48098000
-#define OMAP2_MCSPI2_BASE               0x4809a000
-#define OMAP2_MCSPI3_BASE               0x480b8000
-#define OMAP2_MCSPI4_BASE               0x480ba000
-
-#define OMAP4_MCSPI1_BASE               0x48098100
-#define OMAP4_MCSPI2_BASE               0x4809a100
-#define OMAP4_MCSPI3_BASE               0x480b8100
-#define OMAP4_MCSPI4_BASE               0x480ba100
-
-static struct omap2_mcspi_platform_config omap2_mcspi1_config = {
-        .num_cs         = 4,
-};
-
-static struct resource omap2_mcspi1_resources[] = {
-        {
-                .start          = OMAP2_MCSPI1_BASE,
-                .end            = OMAP2_MCSPI1_BASE + 0xff,
-                .flags          = IORESOURCE_MEM,
-        },
-};
-
-static struct platform_device omap2_mcspi1 = {
-        .name           = "omap2_mcspi",
-        .id             = 1,
-        .num_resources  = ARRAY_SIZE(omap2_mcspi1_resources),
-        .resource       = omap2_mcspi1_resources,
-        .dev            = {
-                .platform_data = &omap2_mcspi1_config,
-        },
-};
-
-static struct omap2_mcspi_platform_config omap2_mcspi2_config = {
-        .num_cs         = 2,
-};
-
-static struct resource omap2_mcspi2_resources[] = {
-        {
-                .start          = OMAP2_MCSPI2_BASE,
-                .end            = OMAP2_MCSPI2_BASE + 0xff,
-                .flags          = IORESOURCE_MEM,
-        },
-};
-
-static struct platform_device omap2_mcspi2 = {
-        .name           = "omap2_mcspi",
-        .id             = 2,
-        .num_resources  = ARRAY_SIZE(omap2_mcspi2_resources),
-        .resource       = omap2_mcspi2_resources,
-        .dev            = {
-                .platform_data = &omap2_mcspi2_config,
-        },
-};
-
-#if defined(CONFIG_SOC_OMAP2430) || defined(CONFIG_ARCH_OMAP3) || \
-        defined(CONFIG_ARCH_OMAP4)
-static struct omap2_mcspi_platform_config omap2_mcspi3_config = {
-        .num_cs         = 2,
-};
-
-static struct resource omap2_mcspi3_resources[] = {
-        {
-        .start          = OMAP2_MCSPI3_BASE,
-        .end            = OMAP2_MCSPI3_BASE + 0xff,
-        .flags          = IORESOURCE_MEM,
-        },
-};
-
-static struct platform_device omap2_mcspi3 = {
-        .name           = "omap2_mcspi",
-        .id             = 3,
-        .num_resources  = ARRAY_SIZE(omap2_mcspi3_resources),
-        .resource       = omap2_mcspi3_resources,
-        .dev            = {
-                .platform_data = &omap2_mcspi3_config,
-        },
-};
-#endif
-
-#if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4)
-static struct omap2_mcspi_platform_config omap2_mcspi4_config = {
-        .num_cs         = 1,
-};
-
-static struct resource omap2_mcspi4_resources[] = {
-        {
-                .start          = OMAP2_MCSPI4_BASE,
-                .end            = OMAP2_MCSPI4_BASE + 0xff,
-                .flags          = IORESOURCE_MEM,
-        },
-};
-
-static struct platform_device omap2_mcspi4 = {
-        .name           = "omap2_mcspi",
-        .id             = 4,
-        .num_resources  = ARRAY_SIZE(omap2_mcspi4_resources),
-        .resource       = omap2_mcspi4_resources,
-        .dev            = {
-                .platform_data = &omap2_mcspi4_config,
+struct omap_device_pm_latency omap_mcspi_latency[] = {
+        [0] = {
+                .deactivate_func = omap_device_idle_hwmods,
+                .activate_func   = omap_device_enable_hwmods,
+                .flags           = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
         },
 };
-#endif
 
-#ifdef CONFIG_ARCH_OMAP4
-static inline void omap4_mcspi_fixup(void)
+static int omap_mcspi_init(struct omap_hwmod *oh, void *unused)
 {
-        omap2_mcspi1_resources[0].start = OMAP4_MCSPI1_BASE;
-        omap2_mcspi1_resources[0].end   = OMAP4_MCSPI1_BASE + 0xff;
-        omap2_mcspi2_resources[0].start = OMAP4_MCSPI2_BASE;
-        omap2_mcspi2_resources[0].end   = OMAP4_MCSPI2_BASE + 0xff;
-        omap2_mcspi3_resources[0].start = OMAP4_MCSPI3_BASE;
-        omap2_mcspi3_resources[0].end   = OMAP4_MCSPI3_BASE + 0xff;
-        omap2_mcspi4_resources[0].start = OMAP4_MCSPI4_BASE;
-        omap2_mcspi4_resources[0].end   = OMAP4_MCSPI4_BASE + 0xff;
-}
-#else
-static inline void omap4_mcspi_fixup(void)
-{
-}
-#endif
+        struct omap_device *od;
+        char *name = "omap2_mcspi";
+        struct omap2_mcspi_platform_config *pdata;
+        static int spi_num;
+        struct omap2_mcspi_dev_attr *mcspi_attrib = oh->dev_attr;
+
+        pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
+        if (!pdata) {
+                pr_err("Memory allocation for McSPI device failed\n");
+                return -ENOMEM;
+        }
 
-#if defined(CONFIG_SOC_OMAP2430) || defined(CONFIG_ARCH_OMAP3) || \
-        defined(CONFIG_ARCH_OMAP4)
-static inline void omap2_mcspi3_init(void)
-{
-        platform_device_register(&omap2_mcspi3);
-}
-#else
-static inline void omap2_mcspi3_init(void)
-{
-}
-#endif
+        pdata->num_cs = mcspi_attrib->num_chipselect;
+        switch (oh->class->rev) {
+        case OMAP2_MCSPI_REV:
+        case OMAP3_MCSPI_REV:
+                        pdata->regs_offset = 0;
+                        break;
+        case OMAP4_MCSPI_REV:
+                        pdata->regs_offset = OMAP4_MCSPI_REG_OFFSET;
+                        break;
+        default:
+                        pr_err("Invalid McSPI Revision value\n");
+                        return -EINVAL;
+        }
 
-#if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4)
-static inline void omap2_mcspi4_init(void)
-{
-        platform_device_register(&omap2_mcspi4);
-}
-#else
-static inline void omap2_mcspi4_init(void)
-{
+        spi_num++;
+        od = omap_device_build(name, spi_num, oh, pdata,
+                                sizeof(*pdata), omap_mcspi_latency,
+                                ARRAY_SIZE(omap_mcspi_latency), 0);
+        WARN(IS_ERR(od), "Cant build omap_device for %s:%s\n",
+                                name, oh->name);
+        kfree(pdata);
+        return 0;
 }
-#endif
 
 static void omap_init_mcspi(void)
 {
-        if (cpu_is_omap44xx())
-                omap4_mcspi_fixup();
-
-        platform_device_register(&omap2_mcspi1);
-        platform_device_register(&omap2_mcspi2);
-
-        if (cpu_is_omap2430() || cpu_is_omap343x() || cpu_is_omap44xx())
-                omap2_mcspi3_init();
-
-        if (cpu_is_omap343x() || cpu_is_omap44xx())
-                omap2_mcspi4_init();
+        omap_hwmod_for_each_by_class("mcspi", omap_mcspi_init, NULL);
 }
 
 #else
diff --git a/arch/arm/plat-omap/include/plat/mcspi.h b/arch/arm/plat-omap/include/plat/mcspi.h
index 560e266da8a1..3d51b18131cc 100644
--- a/arch/arm/plat-omap/include/plat/mcspi.h
+++ b/arch/arm/plat-omap/include/plat/mcspi.h
@@ -5,8 +5,11 @@
 #define OMAP3_MCSPI_REV 1
 #define OMAP4_MCSPI_REV 2
 
+#define OMAP4_MCSPI_REG_OFFSET 0x100
+
 struct omap2_mcspi_platform_config {
         unsigned short  num_cs;
+        unsigned int regs_offset;
 };
 
 struct omap2_mcspi_dev_attr {
diff --git a/drivers/spi/omap2_mcspi.c b/drivers/spi/omap2_mcspi.c
index f076cc5c6fb0..f7851325c61e 100644
--- a/drivers/spi/omap2_mcspi.c
+++ b/drivers/spi/omap2_mcspi.c
@@ -3,7 +3,7 @@
  *
  * Copyright (C) 2005, 2006 Nokia Corporation
  * Author:      Samuel Ortiz <samuel.ortiz@nokia.com> and
- *              Juha Yrjölä <juha.yrjola@nokia.com>
+ *              Juha Yrj�l� <juha.yrjola@nokia.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -1087,91 +1087,14 @@ static int __init omap2_mcspi_reset(struct omap2_mcspi *mcspi)
         return 0;
 }
 
-static u8 __initdata spi1_rxdma_id [] = {
-        OMAP24XX_DMA_SPI1_RX0,
-        OMAP24XX_DMA_SPI1_RX1,
-        OMAP24XX_DMA_SPI1_RX2,
-        OMAP24XX_DMA_SPI1_RX3,
-};
-
-static u8 __initdata spi1_txdma_id [] = {
-        OMAP24XX_DMA_SPI1_TX0,
-        OMAP24XX_DMA_SPI1_TX1,
-        OMAP24XX_DMA_SPI1_TX2,
-        OMAP24XX_DMA_SPI1_TX3,
-};
-
-static u8 __initdata spi2_rxdma_id[] = {
-        OMAP24XX_DMA_SPI2_RX0,
-        OMAP24XX_DMA_SPI2_RX1,
-};
-
-static u8 __initdata spi2_txdma_id[] = {
-        OMAP24XX_DMA_SPI2_TX0,
-        OMAP24XX_DMA_SPI2_TX1,
-};
-
-#if defined(CONFIG_SOC_OMAP2430) || defined(CONFIG_ARCH_OMAP3) \
-        || defined(CONFIG_ARCH_OMAP4)
-static u8 __initdata spi3_rxdma_id[] = {
-        OMAP24XX_DMA_SPI3_RX0,
-        OMAP24XX_DMA_SPI3_RX1,
-};
-
-static u8 __initdata spi3_txdma_id[] = {
-        OMAP24XX_DMA_SPI3_TX0,
-        OMAP24XX_DMA_SPI3_TX1,
-};
-#endif
-
-#if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4)
-static u8 __initdata spi4_rxdma_id[] = {
-        OMAP34XX_DMA_SPI4_RX0,
-};
-
-static u8 __initdata spi4_txdma_id[] = {
-        OMAP34XX_DMA_SPI4_TX0,
-};
-#endif
 
 static int __init omap2_mcspi_probe(struct platform_device *pdev)
 {
         struct spi_master       *master;
+        struct omap2_mcspi_platform_config *pdata = pdev->dev.platform_data;
         struct omap2_mcspi      *mcspi;
         struct resource         *r;
         int                     status = 0, i;
-        const u8                *rxdma_id, *txdma_id;
-        unsigned                num_chipselect;
-
-        switch (pdev->id) {
-        case 1:
-                rxdma_id = spi1_rxdma_id;
-                txdma_id = spi1_txdma_id;
-                num_chipselect = 4;
-                break;
-        case 2:
-                rxdma_id = spi2_rxdma_id;
-                txdma_id = spi2_txdma_id;
-                num_chipselect = 2;
-                break;
-#if defined(CONFIG_SOC_OMAP2430) || defined(CONFIG_ARCH_OMAP3) \
-        || defined(CONFIG_ARCH_OMAP4)
-        case 3:
-                rxdma_id = spi3_rxdma_id;
-                txdma_id = spi3_txdma_id;
-                num_chipselect = 2;
-                break;
-#endif
-#if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4)
-        case 4:
-                rxdma_id = spi4_rxdma_id;
-                txdma_id = spi4_txdma_id;
-                num_chipselect = 1;
-                break;
-#endif
-        default:
-                return -EINVAL;
-        }
 
         master = spi_alloc_master(&pdev->dev, sizeof *mcspi);
         if (master == NULL) {
@@ -1188,7 +1111,7 @@ static int __init omap2_mcspi_probe(struct platform_device *pdev)
         master->setup = omap2_mcspi_setup;
         master->transfer = omap2_mcspi_transfer;
         master->cleanup = omap2_mcspi_cleanup;
-        master->num_chipselect = num_chipselect;
+        master->num_chipselect = pdata->num_cs;
 
         dev_set_drvdata(&pdev->dev, master);
 
@@ -1206,6 +1129,8 @@ static int __init omap2_mcspi_probe(struct platform_device *pdev)
                 goto err1;
         }
 
+        r->start += pdata->regs_offset;
+        r->end += pdata->regs_offset;
         mcspi->phys = r->start;
         mcspi->base = ioremap(r->start, r->end - r->start + 1);
         if (!mcspi->base) {
@@ -1240,11 +1165,32 @@ static int __init omap2_mcspi_probe(struct platform_device *pdev)
         if (mcspi->dma_channels == NULL)
                 goto err3;
 
-        for (i = 0; i < num_chipselect; i++) {
+        for (i = 0; i < master->num_chipselect; i++) {
+                char dma_ch_name[14];
+                struct resource *dma_res;
+
+                sprintf(dma_ch_name, "rx%d", i);
+                dma_res = platform_get_resource_byname(pdev, IORESOURCE_DMA,
+                                                        dma_ch_name);
+                if (!dma_res) {
+                        dev_dbg(&pdev->dev, "cannot get DMA RX channel\n");
+                        status = -ENODEV;
+                        break;
+                }
+
                 mcspi->dma_channels[i].dma_rx_channel = -1;
-                mcspi->dma_channels[i].dma_rx_sync_dev = rxdma_id[i];
+                mcspi->dma_channels[i].dma_rx_sync_dev = dma_res->start;
+                sprintf(dma_ch_name, "tx%d", i);
+                dma_res = platform_get_resource_byname(pdev, IORESOURCE_DMA,
+                                                        dma_ch_name);
+                if (!dma_res) {
+                        dev_dbg(&pdev->dev, "cannot get DMA TX channel\n");
+                        status = -ENODEV;
+                        break;
+                }
+
                 mcspi->dma_channels[i].dma_tx_channel = -1;
-                mcspi->dma_channels[i].dma_tx_sync_dev = txdma_id[i];
+                mcspi->dma_channels[i].dma_tx_sync_dev = dma_res->start;
         }
 
         if (omap2_mcspi_reset(mcspi) < 0)