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Subject[PATCH 02/14] Blackfin SPI driver: use new GPIO API and add error handling
Date
From: Michael Hennerich <michael.hennerich@analog.com>

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
---
drivers/spi/spi_bfin5xx.c | 29 +++++++++++++++++++++++------
include/asm-blackfin/mach-bf533/portmux.h | 2 +-
2 files changed, 24 insertions(+), 7 deletions(-)
diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
index 621a3eb..eeaa65d 100644
--- a/drivers/spi/spi_bfin5xx.c
+++ b/drivers/spi/spi_bfin5xx.c
@@ -1165,6 +1165,22 @@ static inline int destroy_queue(struct driver_data *drv_data)
return 0;
}

+static int setup_pin_mux(int action)
+{
+
+ u16 pin_req[] = {P_SPI0_SCK, P_SPI0_MISO, P_SPI0_MOSI, 0};
+
+ if (action) {
+ if (peripheral_request_list(pin_req, DRV_NAME)) {
+ return -EFAULT;
+ }
+ } else {
+ peripheral_free_list(pin_req);
+ }
+
+ return 0;
+}
+
static int __init bfin5xx_spi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -1182,12 +1198,9 @@ static int __init bfin5xx_spi_probe(struct platform_device *pdev)
return -ENOMEM;
}

- if (peripheral_request(P_SPI0_SCK, DRV_NAME) ||
- peripheral_request(P_SPI0_MISO, DRV_NAME) ||
- peripheral_request(P_SPI0_MOSI, DRV_NAME) ) {
-
+ if (setup_pin_mux(1)) {
dev_err(&pdev->dev, ": Requesting Peripherals failed\n");
- goto out_error_queue_alloc;
+ goto out_error;
}

drv_data = spi_master_get_devdata(master);
@@ -1223,9 +1236,11 @@ static int __init bfin5xx_spi_probe(struct platform_device *pdev)
dev_dbg(&pdev->dev, "controller probe successfully\n");
return status;

- out_error_queue_alloc:
+out_error_queue_alloc:
destroy_queue(drv_data);
+out_error:
spi_master_put(master);
+
return status;
}

@@ -1255,6 +1270,8 @@ static int __devexit bfin5xx_spi_remove(struct platform_device *pdev)
/* Disconnect from the SPI framework */
spi_unregister_master(drv_data->master);

+ setup_pin_mux(0);
+
/* Prevent double remove */
platform_set_drvdata(pdev, NULL);

diff --git a/include/asm-blackfin/mach-bf533/portmux.h b/include/asm-blackfin/mach-bf533/portmux.h
index b88d7a0..137f488 100644
--- a/include/asm-blackfin/mach-bf533/portmux.h
+++ b/include/asm-blackfin/mach-bf533/portmux.h
@@ -42,7 +42,7 @@
#define P_SPORT0_DRPRI (P_DONTCARE)

#define P_SPI0_MOSI (P_DONTCARE)
-#define P_SPI0_MIS0 (P_DONTCARE)
+#define P_SPI0_MISO (P_DONTCARE)
#define P_SPI0_SCK (P_DONTCARE)
#define P_SPI0_SSEL7 (P_DEFINED | P_IDENT(GPIO_PF7))
#define P_SPI0_SSEL6 (P_DEFINED | P_IDENT(GPIO_PF6))
--
1.5.3.4
-
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