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| author | Lucas Stach <l.stach@pengutronix.de> | 2018-11-01 19:25:52 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2018-11-02 07:34:27 +0100 |
| commit | 98af19307b073fcdca1f1c1874a1d3abc7e63b1d (patch) | |
| tree | ac1a95fa431bad3ed480a53cefc565d6621ef61c /arch | |
| parent | e6d0ba8f6c3db368cf5294e17a0f539c76034b95 (diff) | |
| download | barebox-98af19307b073fcdca1f1c1874a1d3abc7e63b1d.tar.gz barebox-98af19307b073fcdca1f1c1874a1d3abc7e63b1d.tar.xz | |
ARM: rdu2: config PMIC SW1AB and SW1C rails to 1.375
This is the default out-of-reset voltage, but if only the i.MX6 SoC
got reset, the PMIC might still be stuck at the lower voltage for the
slow operating point.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/boards/zii-imx6q-rdu2/board.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/arm/boards/zii-imx6q-rdu2/board.c b/arch/arm/boards/zii-imx6q-rdu2/board.c index c99f993f02..49cc234c02 100644 --- a/arch/arm/boards/zii-imx6q-rdu2/board.c +++ b/arch/arm/boards/zii-imx6q-rdu2/board.c @@ -16,6 +16,7 @@ #include <common.h> #include <envfs.h> #include <gpio.h> +#include <i2c/i2c.h> #include <init.h> #include <mach/bbu.h> #include <mach/imx6.h> @@ -137,10 +138,27 @@ late_initcall(rdu2_enable_front_panel_usb); static int rdu2_devices_init(void) { + struct i2c_client client; + if (!of_machine_is_compatible("zii,imx6q-zii-rdu2") && !of_machine_is_compatible("zii,imx6qp-zii-rdu2")) return 0; + client.adapter = i2c_get_adapter(1); + if (client.adapter) { + u8 reg; + + /* + * Reset PMIC SW1AB and SW1C rails to 1.375V. If an event + * caused only the i.MX6 SoC reset, the PMIC might still be + * stuck on the low voltage for the slow operating point. + */ + client.addr = 0x08; /* PMIC i2c address */ + reg = 0x2b; /* 1.375V, valid for both rails */ + i2c_write_reg(&client, 0x20, ®, 1); + i2c_write_reg(&client, 0x2e, ®, 1); + } + barebox_set_hostname("rdu2"); imx6_bbu_internal_spi_i2c_register_handler("SPI", "/dev/m25p0.barebox", |