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authorNikolaus Voss <n.voss@weinmann.de>2011-11-08 11:49:46 +0100
committerWolfram Sang <w.sang@pengutronix.de>2012-09-12 14:49:13 +0200
commitfac368a040484293006bb488e67972aafcf88ec7 (patch)
tree9c132f85cd1a0df4cb1dedcd48d90d2bbb15e6b8 /arch/arm/mach-at91/at91sam9263.c
parenti2c: at91: remove old polling driver (diff)
downloadlinux-fac368a040484293006bb488e67972aafcf88ec7.tar.xz
linux-fac368a040484293006bb488e67972aafcf88ec7.zip
i2c: at91: add new driver
This driver has the following properties compared to the old driver: 1. Support for multiple interfaces. 2. Interrupt driven I/O as opposed to polling/busy waiting. 3. Support for _one_ repeated start (Sr) condition, which is enough for most real-world applications including all SMBus transfer types. (The hardware does not support issuing arbitrary Sr conditions on the bus.) testing: SoC: at91sam9g45 - BQ20Z80 battery SMBus client. - on a 2.6.38 kernel with several i2c clients (temp-sensor, audio-codec, touchscreen-controller, w1-bridge, io-expanders) Signed-off-by: Nikolaus Voss <n.voss@weinmann.de> Reviewed-by: Felipe Balbi <balbi@ti.com> Tested-by: Hubert Feurstein <h.feurstein@gmail.com> Tested-by: Ludovic Desroches <ludovic.desroches@atmel.com> Reviewed-by: Nicolas Ferre <nicolas.ferre@atmel.com> [wsa: squashed with the following patches from Ludovic to have some flaws fixed: i2c: at91: use managed resources i2c: at91: add warning about transmission issues for some devices i2c: at91: use an id table for SoC dependent parameters ] Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Diffstat (limited to 'arch/arm/mach-at91/at91sam9263.c')
-rw-r--r--arch/arm/mach-at91/at91sam9263.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/mach-at91/at91sam9263.c b/arch/arm/mach-at91/at91sam9263.c
index 2a08305b6571..e6b595658e75 100644
--- a/arch/arm/mach-at91/at91sam9263.c
+++ b/arch/arm/mach-at91/at91sam9263.c
@@ -193,7 +193,7 @@ static struct clk_lookup periph_clocks_lookups[] = {
CLKDEV_CON_DEV_ID("spi_clk", "atmel_spi.0", &spi0_clk),
CLKDEV_CON_DEV_ID("spi_clk", "atmel_spi.1", &spi1_clk),
CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.0", &tcb_clk),
- CLKDEV_CON_DEV_ID(NULL, "at91_i2c", &twi_clk),
+ CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9260", &twi_clk),
/* fake hclk clock */
CLKDEV_CON_DEV_ID("hclk", "at91_ohci", &ohci_clk),
CLKDEV_CON_ID("pioA", &pioA_clk),