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| author | Hauke Mehrtens <hauke@openwrt.org> | 2014-09-08 19:55:36 +0000 |
|---|---|---|
| committer | Hauke Mehrtens <hauke@openwrt.org> | 2014-09-08 19:55:36 +0000 |
| commit | b36f776369b11beba6711a014528a3fb62a2d887 (patch) | |
| tree | 3fd4e9cde81de3736205474e7eddc43a2cd32a8a /target/linux/generic/patches-3.9/861-04_spi_gpio_implement_spi_delay.patch | |
| parent | 2f47b07c14e4f9e6182a0943ccbc85a7c28997bd (diff) | |
| download | master-187ad058-b36f776369b11beba6711a014528a3fb62a2d887.tar.gz master-187ad058-b36f776369b11beba6711a014528a3fb62a2d887.tar.bz2 master-187ad058-b36f776369b11beba6711a014528a3fb62a2d887.zip | |
kernel: drop 3.9 support
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@42452 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/generic/patches-3.9/861-04_spi_gpio_implement_spi_delay.patch')
| -rw-r--r-- | target/linux/generic/patches-3.9/861-04_spi_gpio_implement_spi_delay.patch | 58 |
1 files changed, 0 insertions, 58 deletions
diff --git a/target/linux/generic/patches-3.9/861-04_spi_gpio_implement_spi_delay.patch b/target/linux/generic/patches-3.9/861-04_spi_gpio_implement_spi_delay.patch deleted file mode 100644 index 4be08956d7..0000000000 --- a/target/linux/generic/patches-3.9/861-04_spi_gpio_implement_spi_delay.patch +++ /dev/null @@ -1,58 +0,0 @@ -Implement the SPI-GPIO delay function for busses that need speed limitation. - ---mb - - - ---- a/drivers/spi/spi-gpio.c -+++ b/drivers/spi/spi-gpio.c -@@ -22,6 +22,7 @@ - #include <linux/init.h> - #include <linux/platform_device.h> - #include <linux/gpio.h> -+#include <linux/delay.h> - #include <linux/of_device.h> - #include <linux/of_gpio.h> - -@@ -73,6 +74,7 @@ struct spi_gpio { - * #define SPI_MOSI_GPIO 120 - * #define SPI_SCK_GPIO 121 - * #define SPI_N_CHIPSEL 4 -+ * #undef NEED_SPIDELAY - * #include "spi-gpio.c" - */ - -@@ -80,6 +82,7 @@ struct spi_gpio { - #define DRIVER_NAME "spi_gpio" - - #define GENERIC_BITBANG /* vs tight inlines */ -+#define NEED_SPIDELAY 1 - - /* all functions referencing these symbols must define pdata */ - #define SPI_MISO_GPIO ((pdata)->miso) -@@ -130,12 +133,20 @@ static inline int getmiso(const struct s - #undef pdata - - /* -- * NOTE: this clocks "as fast as we can". It "should" be a function of the -- * requested device clock. Software overhead means we usually have trouble -- * reaching even one Mbit/sec (except when we can inline bitops), so for now -- * we'll just assume we never need additional per-bit slowdowns. -+ * NOTE: to clock "as fast as we can", set spi_device.max_speed_hz -+ * and spi_transfer.speed_hz to 0. -+ * Otherwise this is a function of the requested device clock. -+ * Software overhead means we usually have trouble -+ * reaching even one Mbit/sec (except when we can inline bitops). So on small -+ * embedded devices with fast SPI slaves you usually don't need a delay. - */ --#define spidelay(nsecs) do {} while (0) -+static inline void spidelay(unsigned nsecs) -+{ -+#ifdef NEED_SPIDELAY -+ if (unlikely(nsecs)) -+ ndelay(nsecs); -+#endif /* NEED_SPIDELAY */ -+} - - #include "spi-bitbang-txrx.h" - |