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| author | Nikolaus Voss <n.voss@weinmann.de> | 2011-11-08 11:49:46 +0100 |
|---|---|---|
| committer | Wolfram Sang <w.sang@pengutronix.de> | 2012-09-12 14:49:13 +0200 |
| commit | fac368a040484293006bb488e67972aafcf88ec7 (patch) | |
| tree | 9c132f85cd1a0df4cb1dedcd48d90d2bbb15e6b8 /arch/arm/mach-at91/at91sam9261.c | |
| parent | a879e9c34b93ee43f5caa7f94eb17e7af4f6ef50 (diff) | |
| download | blackbird-op-linux-fac368a040484293006bb488e67972aafcf88ec7.tar.gz blackbird-op-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/at91sam9261.c')
| -rw-r--r-- | arch/arm/mach-at91/at91sam9261.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm/mach-at91/at91sam9261.c b/arch/arm/mach-at91/at91sam9261.c index 71ca1e06a16f..8d999eb1a137 100644 --- a/arch/arm/mach-at91/at91sam9261.c +++ b/arch/arm/mach-at91/at91sam9261.c @@ -178,7 +178,8 @@ static struct clk_lookup periph_clocks_lookups[] = { CLKDEV_CON_DEV_ID("pclk", "ssc.1", &ssc1_clk), CLKDEV_CON_DEV_ID("pclk", "ssc.2", &ssc2_clk), CLKDEV_CON_DEV_ID("hclk", "at91_ohci", &hck0), - CLKDEV_CON_DEV_ID(NULL, "at91_i2c", &twi_clk), + CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9261", &twi_clk), + CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g10", &twi_clk), CLKDEV_CON_ID("pioA", &pioA_clk), CLKDEV_CON_ID("pioB", &pioB_clk), CLKDEV_CON_ID("pioC", &pioC_clk), |
