diff options
| author | Steven King <sfking@fdwdc.com> | 2014-06-30 18:53:19 +0200 |
|---|---|---|
| committer | Greg Ungerer <gerg@linux-m68k.org> | 2016-12-04 23:53:27 +0100 |
| commit | 2d24b532f95b8b1b61bf670ef5bdee52bcf59640 (patch) | |
| tree | 9da27a342282f64f0929016fa984fd54a4b48eea /arch/m68k/coldfire/m5249.c | |
| parent | Linux 4.9-rc8 (diff) | |
| download | linux-2d24b532f95b8b1b61bf670ef5bdee52bcf59640.tar.xz linux-2d24b532f95b8b1b61bf670ef5bdee52bcf59640.zip | |
m68knommu: platform support for i2c devices on ColdFire SoC
These changes based on work by Steven King <sfking@fdwdc.com> to support
the i2c hardware modules on ColdFire SoC family devices.
This is the per SoC hardware support. Contains a common platform device
setup. Each of the SoC family members tends to have some minor local
setup required to initialize the module. But all ColdFire family members
use the same i2c hardware module.
This i2c hardware module is the same as used in the Freescale iMX ARM
based family of SoC devices. Steven's original patches were based on using
a new and different i2c-coldfire.c driver. But this is not neccessary as
we can use the existing Linux i2c-imx.c driver with no change required to
it. And this patch is now based on using the existing i2c-imx driver.
This patch only contains the ColdFire platform changes.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Tested-by: Angelo Dureghello <angelo@sysam.it>
Diffstat (limited to 'arch/m68k/coldfire/m5249.c')
| -rw-r--r-- | arch/m68k/coldfire/m5249.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/m68k/coldfire/m5249.c b/arch/m68k/coldfire/m5249.c index e48f55adc447..b16cf9b4580c 100644 --- a/arch/m68k/coldfire/m5249.c +++ b/arch/m68k/coldfire/m5249.c @@ -27,6 +27,8 @@ DEFINE_CLK(mcftmr1, "mcftmr.1", MCF_BUSCLK); DEFINE_CLK(mcfuart0, "mcfuart.0", MCF_BUSCLK); DEFINE_CLK(mcfuart1, "mcfuart.1", MCF_BUSCLK); DEFINE_CLK(mcfqspi0, "mcfqspi.0", MCF_BUSCLK); +DEFINE_CLK(mcfi2c0, "imx1-i2c.0", MCF_BUSCLK); +DEFINE_CLK(mcfi2c1, "imx1-i2c.1", MCF_BUSCLK); struct clk *mcf_clks[] = { &clk_pll, @@ -36,6 +38,8 @@ struct clk *mcf_clks[] = { &clk_mcfuart0, &clk_mcfuart1, &clk_mcfqspi0, + &clk_mcfi2c0, + &clk_mcfi2c1, NULL }; @@ -85,6 +89,26 @@ static void __init m5249_qspi_init(void) /***************************************************************************/ +static void __init m5249_i2c_init(void) +{ +#if IS_ENABLED(CONFIG_I2C_IMX) + u32 r; + + /* first I2C controller uses regular irq setup */ + writeb(MCFSIM_ICR_AUTOVEC | MCFSIM_ICR_LEVEL5 | MCFSIM_ICR_PRI0, + MCFSIM_I2CICR); + mcf_mapirq2imr(MCF_IRQ_I2C0, MCFINTC_I2C); + + /* second I2C controller is completely different */ + r = readl(MCFINTC2_INTPRI_REG(MCF_IRQ_I2C1)); + r &= ~MCFINTC2_INTPRI_BITS(0xf, MCF_IRQ_I2C1); + r |= MCFINTC2_INTPRI_BITS(0x5, MCF_IRQ_I2C1); + writel(r, MCFINTC2_INTPRI_REG(MCF_IRQ_I2C1)); +#endif /* CONFIG_I2C_IMX */ +} + +/***************************************************************************/ + #ifdef CONFIG_M5249C3 static void __init m5249_smc91x_init(void) @@ -111,6 +135,7 @@ void __init config_BSP(char *commandp, int size) m5249_smc91x_init(); #endif m5249_qspi_init(); + m5249_i2c_init(); } /***************************************************************************/ |