diff options
author | Sascha Hauer <s.hauer@pengutronix.de> | 2024-02-05 08:45:48 +0100 |
---|---|---|
committer | Sascha Hauer <s.hauer@pengutronix.de> | 2024-02-08 08:17:00 +0100 |
commit | 8f05c6dbc2879c48b2fb6ba0eca0c5fb66f57f08 (patch) | |
tree | 1237b5f291941ed006be7806eacfcbd04350a622 | |
parent | 8dae33d9a5c0e4eee7e08e07920d77bd322d6401 (diff) | |
download | barebox-8f05c6dbc287.tar.gz barebox-8f05c6dbc287.tar.xz |
i2c: lpi2c: add PBL support
This adds PBL support to the lpi2c driver which can be used for early
I2C support on i.MX93.
Link: https://lore.barebox.org/20240205074553.2005284-4-s.hauer@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
-rw-r--r-- | drivers/i2c/busses/Makefile | 2 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-imx-lpi2c.c | 34 | ||||
-rw-r--r-- | include/pbl/i2c.h | 1 |
3 files changed, 36 insertions, 1 deletions
diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile index 48f9b5be04..b4225995c0 100644 --- a/drivers/i2c/busses/Makefile +++ b/drivers/i2c/busses/Makefile @@ -4,7 +4,7 @@ obj-$(CONFIG_I2C_BCM283X) += i2c-bcm283x.o obj-$(CONFIG_I2C_GPIO) += i2c-gpio.o obj-$(CONFIG_I2C_IMX) += i2c-imx.o lwl-$(CONFIG_I2C_IMX_EARLY) += i2c-imx-early.o -obj-$(CONFIG_I2C_IMX_LPI2C) += i2c-imx-lpi2c.o +obj-pbl-$(CONFIG_I2C_IMX_LPI2C) += i2c-imx-lpi2c.o obj-$(CONFIG_I2C_MV64XXX) += i2c-mv64xxx.o obj-$(CONFIG_I2C_OMAP) += i2c-omap.o obj-$(CONFIG_I2C_TEGRA) += i2c-tegra.o diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c b/drivers/i2c/busses/i2c-imx-lpi2c.c index 42f7b37143..a7d52fb1b1 100644 --- a/drivers/i2c/busses/i2c-imx-lpi2c.c +++ b/drivers/i2c/busses/i2c-imx-lpi2c.c @@ -19,6 +19,7 @@ #include <pinctrl.h> #include <of_gpio.h> #include <of_device.h> +#include <pbl/i2c.h> #include <io.h> #include <i2c/i2c.h> @@ -93,6 +94,7 @@ enum lpi2c_imx_pincfg { struct lpi2c_imx_struct { struct i2c_adapter adapter; + struct pbl_i2c pbl_i2c; int num_clks; struct clk_bulk_data *clks; void __iomem *base; @@ -455,6 +457,36 @@ disable: return (result < 0) ? result : num; } +#ifdef __PBL__ + +static int lpi2c_pbl_imx_xfer(struct pbl_i2c *lpi2c, struct i2c_msg *msgs, int num) +{ + struct lpi2c_imx_struct *lpi2c_imx = container_of(lpi2c, struct lpi2c_imx_struct, pbl_i2c); + + return lpi2c_imx_xfer(&lpi2c_imx->adapter, msgs, num); +} + +struct pbl_i2c *imx93_i2c_early_init(void __iomem *regs) +{ + static struct lpi2c_imx_struct lpi2c; + u32 temp; + + lpi2c.base = regs; + + temp = readl(lpi2c.base + LPI2C_PARAM); + printf("%s: 0x%08x\n", __func__, temp); + lpi2c.txfifosize = 1 << (temp & 0x0f); + lpi2c.rxfifosize = 1 << ((temp >> 8) & 0x0f); + lpi2c.bitrate = 100000; + lpi2c.clk_rate = 24000000; + + lpi2c.pbl_i2c.xfer = lpi2c_pbl_imx_xfer; + + return &lpi2c.pbl_i2c; +} + +#else + static const struct of_device_id lpi2c_imx_of_match[] = { { .compatible = "fsl,imx7ulp-lpi2c" }, { }, @@ -517,6 +549,8 @@ static struct driver lpi2c_imx_driver = { }; coredevice_platform_driver(lpi2c_imx_driver); +#endif + MODULE_AUTHOR("Gao Pan <pandy.gao@nxp.com>"); MODULE_DESCRIPTION("I2C adapter driver for LPI2C bus"); MODULE_LICENSE("GPL"); diff --git a/include/pbl/i2c.h b/include/pbl/i2c.h index ea2ae447a3..b31f72bee7 100644 --- a/include/pbl/i2c.h +++ b/include/pbl/i2c.h @@ -18,6 +18,7 @@ static inline int pbl_i2c_xfer(struct pbl_i2c *i2c, struct pbl_i2c *imx8m_i2c_early_init(void __iomem *regs); struct pbl_i2c *imx6_i2c_early_init(void __iomem *regs); struct pbl_i2c *ls1046_i2c_init(void __iomem *regs); +struct pbl_i2c *imx93_i2c_early_init(void __iomem *regs); static inline int i2c_dev_probe(struct pbl_i2c *i2c, int addr, bool onebyte) { |