spi: struct spi_device constification

Merge series from Geert Uytterhoeven <geert+renesas@glider.be>:

After noticing new cases of casting away constness, I went over all
spi_get_*() functions and their callers, and made the following changes:
  1. Make all pointer parameters const where possible,
  2. Remove unneeded casts, some not even related to constness.

1 files changed, 4 insertions, 4 deletions

diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index bdb35a91b4bf..74bff5a2f53d 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -244,7 +244,7 @@ static inline void spi_dev_put(struct spi_device *spi)
 }
 
 /* ctldata is for the bus_controller driver's runtime state */
-static inline void *spi_get_ctldata(struct spi_device *spi)
+static inline void *spi_get_ctldata(const struct spi_device *spi)
 {
 	return spi->controller_state;
 }
@@ -261,12 +261,12 @@ static inline void spi_set_drvdata(struct spi_device *spi, void *data)
 	dev_set_drvdata(&spi->dev, data);
 }
 
-static inline void *spi_get_drvdata(struct spi_device *spi)
+static inline void *spi_get_drvdata(const struct spi_device *spi)
 {
 	return dev_get_drvdata(&spi->dev);
 }
 
-static inline u8 spi_get_chipselect(struct spi_device *spi, u8 idx)
+static inline u8 spi_get_chipselect(const struct spi_device *spi, u8 idx)
 {
 	return spi->chip_select;
 }
@@ -276,7 +276,7 @@ static inline void spi_set_chipselect(struct spi_device *spi, u8 idx, u8 chipsel
 	spi->chip_select = chipselect;
 }
 
-static inline struct gpio_desc *spi_get_csgpiod(struct spi_device *spi, u8 idx)
+static inline struct gpio_desc *spi_get_csgpiod(const struct spi_device *spi, u8 idx)
 {
 	return spi->cs_gpiod;
 }