diff options
| author | Ionela Voinescu <ionela.voinescu@imgtec.com> | 2015-02-17 18:28:34 +0000 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2015-04-14 12:08:44 +0200 |
| commit | fdce680759be398535c40d2f692f36e94e21f86e (patch) | |
| tree | 075f37f86c8349de7ac6f1a1625548fb642a2e7d /src | |
| parent | 7d16196a8e63cd714d6f3c44d558f645a78ec201 (diff) | |
pistachio: implement clock setup for I2C0
BUG=chrome-os-partner:31438
TEST=tested on Pistachio bring up board; I2C0 clock is
set up properly.
BRANCH=none
Change-Id: I15ffc5f7d8e8aadfc3cd249284bc492d0d13d9a1
Signed-off-by: Stefan Reinauer <reinauer@chromium.org>
Original-Commit-Id: 6404ab6ad12ea1579eaf5ae55a9eddd9bd9f96e2
Original-Change-Id: Iafdf492291b47f0088f3b5e621d630b8d21ab106
Original-Signed-off-by: Ionela Voinescu <ionela.voinescu@imgtec.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/250450
Original-Reviewed-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/9673
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/imgtec/pistachio/clocks.c | 32 | ||||
| -rw-r--r-- | src/soc/imgtec/pistachio/include/soc/clocks.h | 1 |
2 files changed, 33 insertions, 0 deletions
diff --git a/src/soc/imgtec/pistachio/clocks.c b/src/soc/imgtec/pistachio/clocks.c index 5b226407c7..f3a9ceee21 100644 --- a/src/soc/imgtec/pistachio/clocks.c +++ b/src/soc/imgtec/pistachio/clocks.c @@ -98,6 +98,12 @@ #define UART1CLKOUT_CTRL_ADDR 0xB8144240 #define UART1CLKOUT_MASK 0x000003FF +/* Definitions for I2C0 setup */ +#define I2C0CLKDIV1_CTRL_ADDR 0xB814413C +#define I2C0CLKDIV1_MASK 0x0000007F +#define I2C0CLKOUT_CTRL_ADDR 0xB8144140 +#define I2C0CLKOUT_MASK 0x0000007F + /* Definitions for ROM clock setup */ #define ROMCLKOUT_CTRL_ADDR 0xB814490C #define ROMCLKOUT_MASK 0x0000007F @@ -300,6 +306,32 @@ void uart1_clk_setup(u8 divider1, u16 divider2) write32(UART1CLKOUT_CTRL_ADDR, reg); } +/* + * i2c_clk_setup: sets up clocks for I2C0 + * divider1: 7-bit divider value + * divider2: 7-bit divider value + */ +void i2c0_clk_setup(u8 divider1, u16 divider2) +{ + u32 reg; + + /* Check input parameters */ + assert(!(divider1 & ~(I2C0CLKDIV1_MASK))); + assert(!(divider2 & ~(I2C0CLKOUT_MASK))); + + /* Set divider 1 */ + reg = read32(I2C0CLKDIV1_CTRL_ADDR); + reg &= ~I2C0CLKDIV1_MASK; + reg |= divider1 & I2C0CLKDIV1_MASK; + write32(I2C0CLKDIV1_CTRL_ADDR, reg); + + /* Set divider 2 */ + reg = read32(I2C0CLKOUT_CTRL_ADDR); + reg &= ~I2C0CLKOUT_MASK; + reg |= divider2 & I2C0CLKOUT_MASK; + write32(I2C0CLKOUT_CTRL_ADDR, reg); +} + /* system_clk_setup: sets up the system (peripheral) clock */ void system_clk_setup(u8 divider) { diff --git a/src/soc/imgtec/pistachio/include/soc/clocks.h b/src/soc/imgtec/pistachio/include/soc/clocks.h index f57d43d89e..81b640ebbd 100644 --- a/src/soc/imgtec/pistachio/include/soc/clocks.h +++ b/src/soc/imgtec/pistachio/include/soc/clocks.h @@ -28,6 +28,7 @@ int mips_pll_setup(u8 divider1, u8 divider2, u8 predivider, u32 feedback); void system_clk_setup(u8 divider); void mips_clk_setup(u8 divider1, u8 divider2); void uart1_clk_setup(u8 divider1, u16 divider2); +void i2c0_clk_setup(u8 divider1, u16 divider2); int usb_clk_setup(u8 divider, u8 refclksel, u8 fsel); void rom_clk_setup(u8 divider); void eth_clk_setup(u8 mux, u8 divider); |