summaryrefslogtreecommitdiff
path: root/board
diff options
context:
space:
mode:
authorFabio Estevam <festevam@gmail.com>2012-04-30 08:12:04 +0000
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2012-05-15 08:31:32 +0200
commite7e337227bc3895668ad8333cc106e4f813ac96e (patch)
tree1192e6fe3062d0945ed1022b311d138276f6fb66 /board
parent1fc56f1cb06a1d83bd90626677a236761e812324 (diff)
downloadu-boot-imx-e7e337227bc3895668ad8333cc106e4f813ac96e.zip
u-boot-imx-e7e337227bc3895668ad8333cc106e4f813ac96e.tar.gz
u-boot-imx-e7e337227bc3895668ad8333cc106e4f813ac96e.tar.bz2
mx53loco: Add support for 1GHz operation for DA9053-based boards
There are two types of mx53loco boards: initial boards were built with a Dialog DA9053 PMIC and more recent version is based on a Freescale MC34708 PMIC. Add DA9053 PMIC support and adjust the required voltages and clocks for running the CPU at 1GHz. Tested on both versions of mx53loco boards. In the case of a MC34708-based board the CPU operating voltage remains at 800MHz. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Acked-by : Stefano Babic <sbabic@denx.de>
Diffstat (limited to 'board')
-rw-r--r--board/freescale/mx53loco/mx53loco.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/board/freescale/mx53loco/mx53loco.c b/board/freescale/mx53loco/mx53loco.c
index 46aaeb2..0dcec9b 100644
--- a/board/freescale/mx53loco/mx53loco.c
+++ b/board/freescale/mx53loco/mx53loco.c
@@ -36,6 +36,8 @@
#include <mmc.h>
#include <fsl_esdhc.h>
#include <asm/gpio.h>
+#include <pmic.h>
+#include <dialog_pmic.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -291,6 +293,71 @@ int board_mmc_init(bd_t *bis)
}
#endif
+static void setup_iomux_i2c(void)
+{
+ /* I2C1 SDA */
+ mxc_request_iomux(MX53_PIN_CSI0_D8,
+ IOMUX_CONFIG_ALT5 | IOMUX_CONFIG_SION);
+ mxc_iomux_set_input(MX53_I2C1_IPP_SDA_IN_SELECT_INPUT,
+ INPUT_CTL_PATH0);
+ mxc_iomux_set_pad(MX53_PIN_CSI0_D8,
+ PAD_CTL_SRE_FAST | PAD_CTL_DRV_HIGH |
+ PAD_CTL_100K_PU | PAD_CTL_PKE_ENABLE |
+ PAD_CTL_PUE_PULL |
+ PAD_CTL_ODE_OPENDRAIN_ENABLE);
+ /* I2C1 SCL */
+ mxc_request_iomux(MX53_PIN_CSI0_D9,
+ IOMUX_CONFIG_ALT5 | IOMUX_CONFIG_SION);
+ mxc_iomux_set_input(MX53_I2C1_IPP_SCL_IN_SELECT_INPUT,
+ INPUT_CTL_PATH0);
+ mxc_iomux_set_pad(MX53_PIN_CSI0_D9,
+ PAD_CTL_SRE_FAST | PAD_CTL_DRV_HIGH |
+ PAD_CTL_100K_PU | PAD_CTL_PKE_ENABLE |
+ PAD_CTL_PUE_PULL |
+ PAD_CTL_ODE_OPENDRAIN_ENABLE);
+}
+
+static int power_init(void)
+{
+ unsigned int val, ret;
+ struct pmic *p;
+
+ pmic_init();
+ p = get_pmic();
+
+ /* Set VDDA to 1.25V */
+ val = DA9052_BUCKCORE_BCOREEN | DA_BUCKCORE_VBCORE_1_250V;
+ ret = pmic_reg_write(p, DA9053_BUCKCORE_REG, val);
+
+ ret |= pmic_reg_read(p, DA9053_SUPPLY_REG, &val);
+ val |= DA9052_SUPPLY_VBCOREGO;
+ ret |= pmic_reg_write(p, DA9053_SUPPLY_REG, val);
+
+ /* Set Vcc peripheral to 1.35V */
+ ret |= pmic_reg_write(p, DA9053_BUCKPRO_REG, 0x62);
+ ret |= pmic_reg_write(p, DA9053_SUPPLY_REG, 0x62);
+
+ return ret;
+}
+
+static void clock_1GHz(void)
+{
+ int ret;
+ u32 ref_clk = CONFIG_SYS_MX5_HCLK;
+ /*
+ * After increasing voltage to 1.25V, we can switch
+ * CPU clock to 1GHz and DDR to 400MHz safely
+ */
+ ret = mxc_set_clock(ref_clk, 1000, MXC_ARM_CLK);
+ if (ret)
+ printf("CPU: Switch CPU clock to 1GHZ failed\n");
+
+ ret = mxc_set_clock(ref_clk, 400, MXC_PERIPH_CLK);
+ ret |= mxc_set_clock(ref_clk, 400, MXC_DDR_CLK);
+ if (ret)
+ printf("CPU: Switch DDR clock to 400MHz failed\n");
+}
+
int board_early_init_f(void)
{
setup_iomux_uart();
@@ -316,7 +383,11 @@ int print_cpuinfo(void)
#ifdef CONFIG_BOARD_LATE_INIT
int board_late_init(void)
{
+ setup_iomux_i2c();
+ if (!power_init())
+ clock_1GHz();
print_cpuinfo();
+
return 0;
}
#endif