diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/imx_lpi2c.c | 47 | ||||
| -rw-r--r-- | drivers/i2c/muxes/pca954x.c | 9 |
2 files changed, 48 insertions, 8 deletions
diff --git a/drivers/i2c/imx_lpi2c.c b/drivers/i2c/imx_lpi2c.c index ff07ca34aa..6c343072fb 100644 --- a/drivers/i2c/imx_lpi2c.c +++ b/drivers/i2c/imx_lpi2c.c @@ -261,8 +261,14 @@ static int bus_i2c_write(struct udevice *bus, u32 chip, u8 *buf, int len) } +u32 __weak imx_get_i2cclk(u32 i2c_num) +{ + return 0; +} + static int bus_i2c_set_bus_speed(struct udevice *bus, int speed) { + struct imx_lpi2c_bus *i2c_bus = dev_get_priv(bus); struct imx_lpi2c_reg *regs; u32 val; u32 preescale = 0, best_pre = 0, clkhi = 0; @@ -273,9 +279,18 @@ static int bus_i2c_set_bus_speed(struct udevice *bus, int speed) int i; regs = (struct imx_lpi2c_reg *)devfdt_get_addr(bus); - clock_rate = imx_get_i2cclk(bus->seq); - if (!clock_rate) - return -EPERM; + + if (IS_ENABLED(CONFIG_CLK)) { + clock_rate = clk_get_rate(&i2c_bus->per_clk); + if (clock_rate <= 0) { + dev_err(bus, "Failed to get i2c clk: %d\n", clock_rate); + return clock_rate; + } + } else { + clock_rate = imx_get_i2cclk(bus->seq); + if (!clock_rate) + return -EPERM; + } mode = (readl(®s->mcr) & LPI2C_MCR_MEN_MASK) >> LPI2C_MCR_MEN_SHIFT; /* disable master mode */ @@ -417,6 +432,11 @@ static int imx_lpi2c_set_bus_speed(struct udevice *bus, unsigned int speed) return bus_i2c_set_bus_speed(bus, speed); } +__weak int enable_i2c_clk(unsigned char enable, unsigned int i2c_num) +{ + return 0; +} + static int imx_lpi2c_probe(struct udevice *bus) { struct imx_lpi2c_bus *i2c_bus = dev_get_priv(bus); @@ -440,10 +460,23 @@ static int imx_lpi2c_probe(struct udevice *bus) return ret; } - /* To i.MX7ULP, only i2c4-7 can be handled by A7 core */ - ret = enable_i2c_clk(1, bus->seq); - if (ret < 0) - return ret; + if (IS_ENABLED(CONFIG_CLK)) { + ret = clk_get_by_name(bus, "per", &i2c_bus->per_clk); + if (ret) { + dev_err(bus, "Failed to get per clk\n"); + return ret; + } + ret = clk_enable(&i2c_bus->per_clk); + if (ret) { + dev_err(bus, "Failed to enable per clk\n"); + return ret; + } + } else { + /* To i.MX7ULP, only i2c4-7 can be handled by A7 core */ + ret = enable_i2c_clk(1, bus->seq); + if (ret < 0) + return ret; + } ret = bus_i2c_init(bus, 100000); if (ret < 0) diff --git a/drivers/i2c/muxes/pca954x.c b/drivers/i2c/muxes/pca954x.c index 4debc03957..ab8b4000af 100644 --- a/drivers/i2c/muxes/pca954x.c +++ b/drivers/i2c/muxes/pca954x.c @@ -17,7 +17,8 @@ DECLARE_GLOBAL_DATA_PTR; enum pca_type { PCA9544, PCA9547, - PCA9548 + PCA9548, + PCA9646 }; struct chip_desc { @@ -51,6 +52,11 @@ static const struct chip_desc chips[] = { .muxtype = pca954x_isswi, .width = 8, }, + [PCA9646] = { + .enable = 0x0, + .muxtype = pca954x_isswi, + .width = 4, + }, }; static int pca954x_deselect(struct udevice *mux, struct udevice *bus, @@ -86,6 +92,7 @@ static const struct udevice_id pca954x_ids[] = { { .compatible = "nxp,pca9544", .data = PCA9544 }, { .compatible = "nxp,pca9547", .data = PCA9547 }, { .compatible = "nxp,pca9548", .data = PCA9548 }, + { .compatible = "nxp,pca9646", .data = PCA9646 }, { } }; |