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Subject[PATCH v9 07/14] intel_mid: Refactored sfi_parse_devs() function
Date
From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>

SFI device_id[] table parsing code is duplicated in every SFI
device handler. This patch removes this code duplication, by
adding a seperate function get_device_id() to parse through the
device table. Also this patch moves the SPI, I2C, IPC info code from
sfi_parse_devs() to respective device handlers.

Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
---
arch/x86/platform/intel-mid/intel-mid.c | 141 ++++++++++++++++----------------
1 file changed, 71 insertions(+), 70 deletions(-)

diff --git a/arch/x86/platform/intel-mid/intel-mid.c b/arch/x86/platform/intel-mid/intel-mid.c
index 742b7bf..f9c4be8 100644
--- a/arch/x86/platform/intel-mid/intel-mid.c
+++ b/arch/x86/platform/intel-mid/intel-mid.c
@@ -831,20 +831,15 @@ static void __init install_irq_resource(struct platform_device *pdev, int irq)
platform_device_add_resources(pdev, &res, 1);
}

-static void __init sfi_handle_ipc_dev(struct sfi_device_table_entry *entry)
+static void __init sfi_handle_ipc_dev(struct sfi_device_table_entry *pentry,
+ struct devs_id *dev)
{
- const struct devs_id *dev = device_ids;
struct platform_device *pdev;
void *pdata = NULL;

- while (dev->name[0]) {
- if (dev->type == SFI_DEV_TYPE_IPC &&
- !strncmp(dev->name, entry->name, SFI_NAME_LEN)) {
- pdata = dev->get_platform_data(entry);
- break;
- }
- dev++;
- }
+ pr_debug("IPC bus, name = %16.16s, irq = 0x%2x\n",
+ pentry->name, pentry->irq);
+ pdata = dev->get_platform_data(pentry);

/*
* On Medfield the platform device creation is handled by the MSIC
@@ -853,68 +848,94 @@ static void __init sfi_handle_ipc_dev(struct sfi_device_table_entry *entry)
if (intel_mid_has_msic())
return;

- pdev = platform_device_alloc(entry->name, 0);
+ pdev = platform_device_alloc(pentry->name, 0);
if (pdev == NULL) {
pr_err("out of memory for SFI platform device '%s'.\n",
- entry->name);
+ pentry->name);
return;
}
- install_irq_resource(pdev, entry->irq);
+ install_irq_resource(pdev, pentry->irq);

pdev->dev.platform_data = pdata;
intel_scu_device_register(pdev);
}

-static void __init sfi_handle_spi_dev(struct spi_board_info *spi_info)
+static void __init sfi_handle_spi_dev(struct sfi_device_table_entry *pentry,
+ struct devs_id *dev)
{
- const struct devs_id *dev = device_ids;
+ struct spi_board_info spi_info;
void *pdata = NULL;

- while (dev->name[0]) {
- if (dev->type == SFI_DEV_TYPE_SPI &&
- !strncmp(dev->name, spi_info->modalias,
- SFI_NAME_LEN)) {
- pdata = dev->get_platform_data(spi_info);
- break;
- }
- dev++;
- }
- spi_info->platform_data = pdata;
+ memset(&spi_info, 0, sizeof(spi_info));
+ strncpy(spi_info.modalias, pentry->name, SFI_NAME_LEN);
+ spi_info.irq = ((pentry->irq == (u8)0xff) ? 0 : pentry->irq);
+ spi_info.bus_num = pentry->host_num;
+ spi_info.chip_select = pentry->addr;
+ spi_info.max_speed_hz = pentry->max_freq;
+ pr_debug("SPI bus=%d, name=%16.16s, irq=0x%2x, max_freq=%d, cs=%d\n",
+ spi_info.bus_num,
+ spi_info.modalias,
+ spi_info.irq,
+ spi_info.max_speed_hz,
+ spi_info.chip_select);
+
+ pdata = dev->get_platform_data(&spi_info);
+
+ spi_info.platform_data = pdata;
if (dev->delay)
- intel_scu_spi_device_register(spi_info);
+ intel_scu_spi_device_register(&spi_info);
else
- spi_register_board_info(spi_info, 1);
+ spi_register_board_info(&spi_info, 1);
}

-static void __init sfi_handle_i2c_dev(int bus, struct i2c_board_info *i2c_info)
+static void __init sfi_handle_i2c_dev(struct sfi_device_table_entry *pentry,
+ struct devs_id *dev)
{
- const struct devs_id *dev = device_ids;
+ struct i2c_board_info i2c_info;
void *pdata = NULL;

+ memset(&i2c_info, 0, sizeof(i2c_info));
+ strncpy(i2c_info.type, pentry->name, SFI_NAME_LEN);
+ i2c_info.irq = ((pentry->irq == (u8)0xff) ? 0 : pentry->irq);
+ i2c_info.addr = pentry->addr;
+ pr_debug("I2C bus = %d, name = %16.16s, irq = 0x%2x, addr = 0x%x\n",
+ pentry->host_num,
+ i2c_info.type,
+ i2c_info.irq,
+ i2c_info.addr);
+ pdata = dev->get_platform_data(&i2c_info);
+ i2c_info.platform_data = pdata;
+
+ if (dev->delay)
+ intel_scu_i2c_device_register(pentry->host_num, &i2c_info);
+ else
+ i2c_register_board_info(pentry->host_num, &i2c_info, 1);
+}
+
+static struct devs_id __init *get_device_id(u8 type, char *name)
+{
+ struct devs_id *dev = device_ids;
+
+ if (device_ids == NULL)
+ return NULL;
+
while (dev->name[0]) {
- if (dev->type == SFI_DEV_TYPE_I2C &&
- !strncmp(dev->name, i2c_info->type, SFI_NAME_LEN)) {
- pdata = dev->get_platform_data(i2c_info);
- break;
+ if (dev->type == type &&
+ !strncmp(dev->name, name, SFI_NAME_LEN)) {
+ return dev;
}
dev++;
}
- i2c_info->platform_data = pdata;

- if (dev->delay)
- intel_scu_i2c_device_register(bus, i2c_info);
- else
- i2c_register_board_info(bus, i2c_info, 1);
+ return NULL;
}

-
static int __init sfi_parse_devs(struct sfi_table_header *table)
{
struct sfi_table_simple *sb;
struct sfi_device_table_entry *pentry;
- struct spi_board_info spi_info;
- struct i2c_board_info i2c_info;
- int num, i, bus;
+ struct devs_id *dev = NULL;
+ int num, i;
int ioapic;
struct io_apic_irq_attr irq_attr;

@@ -939,40 +960,20 @@ static int __init sfi_parse_devs(struct sfi_table_header *table)
} else
irq = 0; /* No irq */

+ dev = get_device_id(pentry->type, pentry->name);
+
+ if ((dev == NULL) || (dev->get_platform_data == NULL))
+ continue;
+
switch (pentry->type) {
case SFI_DEV_TYPE_IPC:
- pr_debug("info[%2d]: IPC bus, name = %16.16s, "
- "irq = 0x%2x\n", i, pentry->name, pentry->irq);
- sfi_handle_ipc_dev(pentry);
+ sfi_handle_ipc_dev(pentry, dev);
break;
case SFI_DEV_TYPE_SPI:
- memset(&spi_info, 0, sizeof(spi_info));
- strncpy(spi_info.modalias, pentry->name, SFI_NAME_LEN);
- spi_info.irq = irq;
- spi_info.bus_num = pentry->host_num;
- spi_info.chip_select = pentry->addr;
- spi_info.max_speed_hz = pentry->max_freq;
- pr_debug("info[%2d]: SPI bus = %d, name = %16.16s, "
- "irq = 0x%2x, max_freq = %d, cs = %d\n", i,
- spi_info.bus_num,
- spi_info.modalias,
- spi_info.irq,
- spi_info.max_speed_hz,
- spi_info.chip_select);
- sfi_handle_spi_dev(&spi_info);
+ sfi_handle_spi_dev(pentry, dev);
break;
case SFI_DEV_TYPE_I2C:
- memset(&i2c_info, 0, sizeof(i2c_info));
- bus = pentry->host_num;
- strncpy(i2c_info.type, pentry->name, SFI_NAME_LEN);
- i2c_info.irq = irq;
- i2c_info.addr = pentry->addr;
- pr_debug("info[%2d]: I2C bus = %d, name = %16.16s, "
- "irq = 0x%2x, addr = 0x%x\n", i, bus,
- i2c_info.type,
- i2c_info.irq,
- i2c_info.addr);
- sfi_handle_i2c_dev(bus, &i2c_info);
+ sfi_handle_i2c_dev(pentry, dev);
break;
case SFI_DEV_TYPE_UART:
case SFI_DEV_TYPE_HSI:
--
1.8.4.rc3


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