Commit e446630c authored by Marc Zyngier's avatar Marc Zyngier Committed by David S. Miller

Add hotplug support to mcp251x driver

Chip model can now be selected directly by matching the modalias name
(instead of filling the .model field in platform_data), and allows the
module to be auto-loaded. Previous behaviour is of course still supported.

Convert the two in-tree users to this feature (icontrol & zeus).
Tested on an Zeus platform (mcp2515).
Signed-off-by: default avatarMarc Zyngier <maz@misterjones.org>
Acked-by: default avatarChristian Pellegrin <chripell@fsfe.org>
Cc: Edwin Peer <epeer@tmtservices.co.za>
Acked-by: default avatarWolfgang Grandegger <wg@grandegger.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 598ed936
...@@ -73,7 +73,6 @@ static struct pxa2xx_spi_chip mcp251x_chip_info4 = { ...@@ -73,7 +73,6 @@ static struct pxa2xx_spi_chip mcp251x_chip_info4 = {
static struct mcp251x_platform_data mcp251x_info = { static struct mcp251x_platform_data mcp251x_info = {
.oscillator_frequency = 16E6, .oscillator_frequency = 16E6,
.model = CAN_MCP251X_MCP2515,
.board_specific_setup = NULL, .board_specific_setup = NULL,
.power_enable = NULL, .power_enable = NULL,
.transceiver_enable = NULL .transceiver_enable = NULL
...@@ -81,7 +80,7 @@ static struct mcp251x_platform_data mcp251x_info = { ...@@ -81,7 +80,7 @@ static struct mcp251x_platform_data mcp251x_info = {
static struct spi_board_info mcp251x_board_info[] = { static struct spi_board_info mcp251x_board_info[] = {
{ {
.modalias = "mcp251x", .modalias = "mcp2515",
.max_speed_hz = 6500000, .max_speed_hz = 6500000,
.bus_num = 3, .bus_num = 3,
.chip_select = 0, .chip_select = 0,
...@@ -90,7 +89,7 @@ static struct spi_board_info mcp251x_board_info[] = { ...@@ -90,7 +89,7 @@ static struct spi_board_info mcp251x_board_info[] = {
.irq = gpio_to_irq(ICONTROL_MCP251x_nIRQ1) .irq = gpio_to_irq(ICONTROL_MCP251x_nIRQ1)
}, },
{ {
.modalias = "mcp251x", .modalias = "mcp2515",
.max_speed_hz = 6500000, .max_speed_hz = 6500000,
.bus_num = 3, .bus_num = 3,
.chip_select = 1, .chip_select = 1,
...@@ -99,7 +98,7 @@ static struct spi_board_info mcp251x_board_info[] = { ...@@ -99,7 +98,7 @@ static struct spi_board_info mcp251x_board_info[] = {
.irq = gpio_to_irq(ICONTROL_MCP251x_nIRQ2) .irq = gpio_to_irq(ICONTROL_MCP251x_nIRQ2)
}, },
{ {
.modalias = "mcp251x", .modalias = "mcp2515",
.max_speed_hz = 6500000, .max_speed_hz = 6500000,
.bus_num = 4, .bus_num = 4,
.chip_select = 0, .chip_select = 0,
...@@ -108,7 +107,7 @@ static struct spi_board_info mcp251x_board_info[] = { ...@@ -108,7 +107,7 @@ static struct spi_board_info mcp251x_board_info[] = {
.irq = gpio_to_irq(ICONTROL_MCP251x_nIRQ3) .irq = gpio_to_irq(ICONTROL_MCP251x_nIRQ3)
}, },
{ {
.modalias = "mcp251x", .modalias = "mcp2515",
.max_speed_hz = 6500000, .max_speed_hz = 6500000,
.bus_num = 4, .bus_num = 4,
.chip_select = 1, .chip_select = 1,
......
...@@ -414,15 +414,13 @@ static int zeus_mcp2515_transceiver_enable(int enable) ...@@ -414,15 +414,13 @@ static int zeus_mcp2515_transceiver_enable(int enable)
static struct mcp251x_platform_data zeus_mcp2515_pdata = { static struct mcp251x_platform_data zeus_mcp2515_pdata = {
.oscillator_frequency = 16*1000*1000, .oscillator_frequency = 16*1000*1000,
.model = CAN_MCP251X_MCP2515,
.board_specific_setup = zeus_mcp2515_setup, .board_specific_setup = zeus_mcp2515_setup,
.transceiver_enable = zeus_mcp2515_transceiver_enable,
.power_enable = zeus_mcp2515_transceiver_enable, .power_enable = zeus_mcp2515_transceiver_enable,
}; };
static struct spi_board_info zeus_spi_board_info[] = { static struct spi_board_info zeus_spi_board_info[] = {
[0] = { [0] = {
.modalias = "mcp251x", .modalias = "mcp2515",
.platform_data = &zeus_mcp2515_pdata, .platform_data = &zeus_mcp2515_pdata,
.irq = gpio_to_irq(ZEUS_CAN_GPIO), .irq = gpio_to_irq(ZEUS_CAN_GPIO),
.max_speed_hz = 1*1000*1000, .max_speed_hz = 1*1000*1000,
......
...@@ -922,12 +922,16 @@ static int __devinit mcp251x_can_probe(struct spi_device *spi) ...@@ -922,12 +922,16 @@ static int __devinit mcp251x_can_probe(struct spi_device *spi)
struct net_device *net; struct net_device *net;
struct mcp251x_priv *priv; struct mcp251x_priv *priv;
struct mcp251x_platform_data *pdata = spi->dev.platform_data; struct mcp251x_platform_data *pdata = spi->dev.platform_data;
int model = spi_get_device_id(spi)->driver_data;
int ret = -ENODEV; int ret = -ENODEV;
if (!pdata) if (!pdata)
/* Platform data is required for osc freq */ /* Platform data is required for osc freq */
goto error_out; goto error_out;
if (model)
pdata->model = model;
/* Allocate can/net device */ /* Allocate can/net device */
net = alloc_candev(sizeof(struct mcp251x_priv), TX_ECHO_SKB_MAX); net = alloc_candev(sizeof(struct mcp251x_priv), TX_ECHO_SKB_MAX);
if (!net) { if (!net) {
...@@ -1117,6 +1121,15 @@ static int mcp251x_can_resume(struct spi_device *spi) ...@@ -1117,6 +1121,15 @@ static int mcp251x_can_resume(struct spi_device *spi)
#define mcp251x_can_resume NULL #define mcp251x_can_resume NULL
#endif #endif
static struct spi_device_id mcp251x_id_table[] = {
{ "mcp251x", 0 /* Use pdata.model */ },
{ "mcp2510", CAN_MCP251X_MCP2510 },
{ "mcp2515", CAN_MCP251X_MCP2515 },
{ },
};
MODULE_DEVICE_TABLE(spi, mcp251x_id_table);
static struct spi_driver mcp251x_can_driver = { static struct spi_driver mcp251x_can_driver = {
.driver = { .driver = {
.name = DEVICE_NAME, .name = DEVICE_NAME,
...@@ -1124,6 +1137,7 @@ static struct spi_driver mcp251x_can_driver = { ...@@ -1124,6 +1137,7 @@ static struct spi_driver mcp251x_can_driver = {
.owner = THIS_MODULE, .owner = THIS_MODULE,
}, },
.id_table = mcp251x_id_table,
.probe = mcp251x_can_probe, .probe = mcp251x_can_probe,
.remove = __devexit_p(mcp251x_can_remove), .remove = __devexit_p(mcp251x_can_remove),
.suspend = mcp251x_can_suspend, .suspend = mcp251x_can_suspend,
......
...@@ -26,8 +26,8 @@ ...@@ -26,8 +26,8 @@
struct mcp251x_platform_data { struct mcp251x_platform_data {
unsigned long oscillator_frequency; unsigned long oscillator_frequency;
int model; int model;
#define CAN_MCP251X_MCP2510 0 #define CAN_MCP251X_MCP2510 0x2510
#define CAN_MCP251X_MCP2515 1 #define CAN_MCP251X_MCP2515 0x2515
int (*board_specific_setup)(struct spi_device *spi); int (*board_specific_setup)(struct spi_device *spi);
int (*transceiver_enable)(int enable); int (*transceiver_enable)(int enable);
int (*power_enable) (int enable); int (*power_enable) (int enable);
......
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