diff options
| author | Peng Fan <peng.fan@nxp.com> | 2019-08-08 01:43:30 +0000 |
|---|---|---|
| committer | Heiko Schocher <hs@denx.de> | 2019-09-02 06:35:08 +0200 |
| commit | 6dba0864ece3f4006abae8ff9e2ad74f4374359d (patch) | |
| tree | 212e7ffdd9d76481985aaa287307f0a7707cc418 | |
| parent | 877294b56a52f1cb60bbfa7e4722fcc33451f7b2 (diff) | |
i2c: mxc: add CONFIG_CLK support
When CONFIG_CLK enabled, use CLK UCLASS for clk related settings.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Tested-by: Frieder Schrempf <frieder.schrempf@kontron.de>
hs: removed hunk in mxc_i2c_probe() as not longer in code
| -rw-r--r-- | arch/arm/include/asm/mach-imx/mxc_i2c.h | 6 | ||||
| -rw-r--r-- | drivers/i2c/mxc_i2c.c | 18 |
2 files changed, 24 insertions, 0 deletions
diff --git a/arch/arm/include/asm/mach-imx/mxc_i2c.h b/arch/arm/include/asm/mach-imx/mxc_i2c.h index 8e1ea9af19..81fd981444 100644 --- a/arch/arm/include/asm/mach-imx/mxc_i2c.h +++ b/arch/arm/include/asm/mach-imx/mxc_i2c.h @@ -6,6 +6,9 @@ #define __ASM_ARCH_MXC_MXC_I2C_H__ #include <asm-generic/gpio.h> #include <asm/mach-imx/iomux-v3.h> +#if CONFIG_IS_ENABLED(CLK) +#include <clk.h> +#endif struct i2c_pin_ctrl { iomux_v3_cfg_t i2c_mode; @@ -47,6 +50,9 @@ struct mxc_i2c_bus { ulong driver_data; int speed; struct i2c_pads_info *pads_info; +#if CONFIG_IS_ENABLED(CLK) + struct clk per_clk; +#endif #ifndef CONFIG_DM_I2C int (*idle_bus_fn)(void *p); void *idle_bus_data; diff --git a/drivers/i2c/mxc_i2c.c b/drivers/i2c/mxc_i2c.c index 20f6dc4ecb..786b5a2226 100644 --- a/drivers/i2c/mxc_i2c.c +++ b/drivers/i2c/mxc_i2c.c @@ -149,7 +149,12 @@ static uint8_t i2c_imx_get_clk(struct mxc_i2c_bus *i2c_bus, unsigned int rate) #endif /* Divider value calculation */ +#if CONFIG_IS_ENABLED(CLK) + i2c_clk_rate = clk_get_rate(&i2c_bus->per_clk); +#else i2c_clk_rate = mxc_get_clock(MXC_I2C_CLK); +#endif + div = (i2c_clk_rate + rate - 1) / rate; if (div < i2c_clk_div[0][0]) clk_div = 0; @@ -891,9 +896,22 @@ static int mxc_i2c_probe(struct udevice *bus) i2c_bus->bus = bus; /* Enable clk */ +#if CONFIG_IS_ENABLED(CLK) + ret = clk_get_by_index(bus, 0, &i2c_bus->per_clk); + if (ret) { + printf("Failed to get i2c clk\n"); + return ret; + } + ret = clk_enable(&i2c_bus->per_clk); + if (ret) { + printf("Failed to enable i2c clk\n"); + return ret; + } +#else ret = enable_i2c_clk(1, bus->seq); if (ret < 0) return ret; +#endif /* * See Documentation/devicetree/bindings/i2c/i2c-imx.txt |