From: Peng Fan <peng.fan@nxp.com>
Date: Thu, 8 Aug 2019 01:43:30 +0000 (+0000)
Subject: i2c: mxc: add CONFIG_CLK support
X-Git-Tag: v2019.10-rc4~24^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6dba0864ece3f4006abae8ff9e2ad74f4374359d;p=platform%2Fkernel%2Fu-boot.git

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
---

diff --git a/arch/arm/include/asm/mach-imx/mxc_i2c.h b/arch/arm/include/asm/mach-imx/mxc_i2c.h
index 8e1ea9a..81fd981 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 20f6dc4..786b5a2 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