Hello Peng,
Am 27.08.2019 um 11:55 schrieb Peng Fan:
Hi Heiko,
Subject: [PATCH v2] i2c: mxc: add CONFIG_CLK support
Would you pick up this patch?
Thanks, Peng.
When CONFIG_CLK enabled, use CLK UCLASS for clk related settings.
Signed-off-by: Peng Fan peng.fan@nxp.com
V2: use clk_get_rate when getting i2c per clk rate with CLK UCLASS
arch/arm/include/asm/mach-imx/mxc_i2c.h | 6 ++++++ drivers/i2c/mxc_i2c.c | 22 ++++++++++++++++++++++ 2 files changed, 28 insertions(+)
Applied to u-boot-i2c.git:
https://gitlab.denx.de/u-boot/custodians/u-boot-i2c/commit/6dba0864ece3f4006...
Travis builds fine, pull request follows soon.
bye, Heiko
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 23119cce65..8d6b4650ff 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;
@@ -890,9 +895,22 @@ 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 @@ -919,7 +937,11 @@ static int mxc_i2c_probe(struct udevice *bus) ret = i2c_idle_bus(i2c_bus); if (ret < 0) { /* Disable clk */ +#if CONFIG_IS_ENABLED(CLK)
clk_disable(&i2c_bus->per_clk);+#else enable_i2c_clk(0, bus->seq); +#endif return ret; }
-- 2.16.4