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pistachio: add clock setup for all I2C interfaces 

BUG=chrome-os-partner:31438
TEST=tested on Pistachio bring up board; all I2C interfaces
     were tested with the TPM and they all work properly.
BRANCH=none

Change-Id: I02202585140beb818212c02800f6b7e4966a922a
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 33b2adecc4939ac73fffba47adf1c8306a888b8d
Original-Change-Id: Ida7eaa72d4d6e6b034319086410de5baa63788bc
Original-Signed-off-by: Ionela Voinescu <ionela.voinescu@imgtec.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/256361
Original-Reviewed-by: Chris Lane <chris.lane@frontier-silicon.com>
Original-Reviewed-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/9839
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Ionela Voinescu 2015-03-05 13:09:57 +00:00 committed by Patrick Georgi
parent 9ff8f6f818
commit 38063b050d
3 changed files with 20 additions and 20 deletions
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2
src/mainboard/google/urara/bootblock.c
View File

@ -193,7 +193,7 @@ static int init_clocks(void)
uart1_clk_setup(6, 61);
/* System PLL divided by 4 divided by 3 -> 33.33 MHz */
i2c0_clk_setup(3, 2);
i2c_clk_setup(3, 2, 0);
/* Ethernet clocks setup: ENET as clock source */
eth_clk_setup(0, 7);

36
src/soc/imgtec/pistachio/clocks.c
View File

@ -98,11 +98,11 @@
#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 I2C setup */
#define I2CCLKDIV1_CTRL_ADDR(i) (0xB8144000 + 0x013C + (2*(i)*4))
#define I2CCLKDIV1_MASK 0x0000007F
#define I2CCLKOUT_CTRL_ADDR(i) (0xB8144000 + 0x0140 + (2*(i)*4))
#define I2CCLKOUT_MASK 0x0000007F
/* Definitions for ROM clock setup */
#define ROMCLKOUT_CTRL_ADDR 0xB814490C
@ -307,29 +307,29 @@ void uart1_clk_setup(u8 divider1, u16 divider2)
}
/*
* i2c_clk_setup: sets up clocks for I2C0
* i2c_clk_setup: sets up clocks for I2C
* divider1: 7-bit divider value
* divider2: 7-bit divider value
*/
void i2c0_clk_setup(u8 divider1, u16 divider2)
void i2c_clk_setup(u8 divider1, u16 divider2, u8 interface)
{
u32 reg;
/* Check input parameters */
assert(!(divider1 & ~(I2C0CLKDIV1_MASK)));
assert(!(divider2 & ~(I2C0CLKOUT_MASK)));
assert(!(divider1 & ~(I2CCLKDIV1_MASK)));
assert(!(divider2 & ~(I2CCLKOUT_MASK)));
assert(interface < 4);
/* Set divider 1 */
reg = read32(I2C0CLKDIV1_CTRL_ADDR);
reg &= ~I2C0CLKDIV1_MASK;
reg |= divider1 & I2C0CLKDIV1_MASK;
write32(I2C0CLKDIV1_CTRL_ADDR, reg);
reg = read32(I2CCLKDIV1_CTRL_ADDR(interface));
reg &= ~I2CCLKDIV1_MASK;
reg |= divider1 & I2CCLKDIV1_MASK;
write32(I2CCLKDIV1_CTRL_ADDR(interface), reg);
/* Set divider 2 */
reg = read32(I2C0CLKOUT_CTRL_ADDR);
reg &= ~I2C0CLKOUT_MASK;
reg |= divider2 & I2C0CLKOUT_MASK;
write32(I2C0CLKOUT_CTRL_ADDR, reg);
reg = read32(I2CCLKOUT_CTRL_ADDR(interface));
reg &= ~I2CCLKOUT_MASK;
reg |= divider2 & I2CCLKOUT_MASK;
write32(I2CCLKOUT_CTRL_ADDR(interface), reg);
}
/* system_clk_setup: sets up the system (peripheral) clock */

2
src/soc/imgtec/pistachio/include/soc/clocks.h
View File

@ -28,7 +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);
void i2c_clk_setup(u8 divider1, u16 divider2, u8 interface);
int usb_clk_setup(u8 divider, u8 refclksel, u8 fsel);
void rom_clk_setup(u8 divider);
void eth_clk_setup(u8 mux, u8 divider);