diff options
| author | Robert Hancock <robert.hancock@calian.com> | 2021-03-25 13:26:42 -0600 |
|---|---|---|
| committer | Stephen Boyd <sboyd@kernel.org> | 2021-06-27 19:58:15 -0700 |
| commit | 2f02c5e42a55fbdb1b4f113df2c26a5c99e8d578 (patch) | |
| tree | 5fd9cf26ca154e2f98ef41d6546773c2344eb630 /drivers/clk | |
| parent | ab89a3439ffa61913a625c34758a46c8ca0c0713 (diff) | |
clk: si5341: Add silabs,iovdd-33 property
Add a property to allow specifying that the external I2C IO pins are using
3.3V voltage thresholds rather than 1.8V.
Signed-off-by: Robert Hancock <robert.hancock@calian.com>
Link: https://lore.kernel.org/r/20210325192643.2190069-9-robert.hancock@calian.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Diffstat (limited to 'drivers/clk')
| -rw-r--r-- | drivers/clk/clk-si5341.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/clk/clk-si5341.c b/drivers/clk/clk-si5341.c index c5ab4a5ae6a5..d4aa67a4dc66 100644 --- a/drivers/clk/clk-si5341.c +++ b/drivers/clk/clk-si5341.c @@ -81,6 +81,7 @@ struct clk_si5341 { u8 num_synth; u16 chip_id; bool xaxb_ext_clk; + bool iovdd_33; }; #define to_clk_si5341(_hw) container_of(_hw, struct clk_si5341, hw) @@ -103,6 +104,7 @@ struct clk_si5341_output_config { #define SI5341_IN_SEL 0x0021 #define SI5341_DEVICE_READY 0x00FE #define SI5341_XAXB_CFG 0x090E +#define SI5341_IO_VDD_SEL 0x0943 #define SI5341_IN_EN 0x0949 #define SI5341_INX_TO_PFD_EN 0x094A @@ -351,7 +353,6 @@ static const struct si5341_reg_default si5341_reg_defaults[] = { { 0x0804, 0x00 }, /* Not in datasheet */ { 0x090E, 0x02 }, /* XAXB_EXTCLK_EN=0 XAXB_PDNB=1 (use XTAL) */ { 0x091C, 0x04 }, /* ZDM_EN=4 (Normal mode) */ - { 0x0943, 0x00 }, /* IO_VDD_SEL=0 (0=1v8, use 1=3v3) */ { 0x0949, 0x00 }, /* IN_EN (disable input clocks) */ { 0x094A, 0x00 }, /* INx_TO_PFD_EN (disabled) */ { 0x0A02, 0x00 }, /* Not in datasheet */ @@ -1160,6 +1161,11 @@ static int si5341_finalize_defaults(struct clk_si5341 *data) int res; u32 revision; + res = regmap_write(data->regmap, SI5341_IO_VDD_SEL, + data->iovdd_33 ? 1 : 0); + if (res < 0) + return res; + res = regmap_read(data->regmap, SI5341_DEVICE_REV, &revision); if (res < 0) return res; @@ -1544,6 +1550,8 @@ static int si5341_probe(struct i2c_client *client, } data->xaxb_ext_clk = of_property_read_bool(client->dev.of_node, "silabs,xaxb-ext-clk"); + data->iovdd_33 = of_property_read_bool(client->dev.of_node, + "silabs,iovdd-33"); if (initialization_required) { /* Populate the regmap cache in preparation for "cache only" */ |