From patchwork Wed Jul 8 03:32:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Glass X-Patchwork-Id: 240989 List-Id: U-Boot discussion From: sjg at chromium.org (Simon Glass) Date: Tue, 7 Jul 2020 21:32:27 -0600 Subject: [PATCH v2 26/44] i2c: designware_i2c: Add a little more debugging In-Reply-To: <20200708033246.2626378-1-sjg@chromium.org> References: <20200708033246.2626378-1-sjg@chromium.org> Message-ID: <20200708033246.2626378-15-sjg@chromium.org> Add debugging for a few more values and also use log to show return values when something goes wrong. This makes it easier to see the root cause. Signed-off-by: Simon Glass Reviewed-by: Bin Meng Reviewed-by: Wolfgang Wallner Reviewed-by: Heiko Schocher --- (no changes since v1) Changes in v1: - Add new patch to improve designware_i2c debugging drivers/i2c/designware_i2c.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/i2c/designware_i2c.c b/drivers/i2c/designware_i2c.c index 3616e2105f..44a1f33398 100644 --- a/drivers/i2c/designware_i2c.c +++ b/drivers/i2c/designware_i2c.c @@ -160,9 +160,9 @@ static int dw_i2c_calc_timing(struct dw_i2c *priv, enum i2c_speed_mode mode, min_tlow_cnt = calc_counts(ic_clk, info->min_scl_lowtime_ns); min_thigh_cnt = calc_counts(ic_clk, info->min_scl_hightime_ns); - debug("dw_i2c: period %d rise %d fall %d tlow %d thigh %d spk %d\n", - period_cnt, rise_cnt, fall_cnt, min_tlow_cnt, min_thigh_cnt, - spk_cnt); + debug("dw_i2c: mode %d, ic_clk %d, speed %d, period %d rise %d fall %d tlow %d thigh %d spk %d\n", + mode, ic_clk, info->speed, period_cnt, rise_cnt, fall_cnt, + min_tlow_cnt, min_thigh_cnt, spk_cnt); /* * Back-solve for hcnt and lcnt according to the following equations: @@ -174,7 +174,7 @@ static int dw_i2c_calc_timing(struct dw_i2c *priv, enum i2c_speed_mode mode, if (hcnt < 0 || lcnt < 0) { debug("dw_i2c: bad counts. hcnt = %d lcnt = %d\n", hcnt, lcnt); - return -EINVAL; + return log_msg_ret("counts", -EINVAL); } /* @@ -713,7 +713,7 @@ static int designware_i2c_set_bus_speed(struct udevice *bus, unsigned int speed) #if CONFIG_IS_ENABLED(CLK) rate = clk_get_rate(&i2c->clk); if (IS_ERR_VALUE(rate)) - return -EINVAL; + return log_ret(-EINVAL); #else rate = IC_CLK; #endif