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authorIonela Voinescu <ionela.voinescu@imgtec.com>2015-02-17 18:28:34 +0000
committerPatrick Georgi <pgeorgi@google.com>2015-04-14 12:08:44 +0200
commitfdce680759be398535c40d2f692f36e94e21f86e (patch)
tree075f37f86c8349de7ac6f1a1625548fb642a2e7d
parent7d16196a8e63cd714d6f3c44d558f645a78ec201 (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>
-rw-r--r--src/soc/imgtec/pistachio/clocks.c32
-rw-r--r--src/soc/imgtec/pistachio/include/soc/clocks.h1
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);