mfd: ti_am335x_tscadc: Simplify divisor calculation

Let's rewrite this on a single line, it does not hurt the readability
and saves a useless temporary variable.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20211015081506.933180-16-miquel.raynal@bootlin.com

diff --git a/drivers/mfd/ti_am335x_tscadc.c b/drivers/mfd/ti_am335x_tscadc.c
index 7f7b8e7..20d8dde 100644 (file)
--- a/drivers/mfd/ti_am335x_tscadc.c
+++ b/drivers/mfd/ti_am335x_tscadc.c
@@ -122,7 +122,6 @@ static      int ti_tscadc_probe(struct platform_device *pdev)
        const __be32 *cur;
        u32 val;
        int err, ctrl;
-       int clock_rate;
        int tsc_wires = 0, adc_channels = 0, total_channels;
        int readouts = 0;
 
@@ -212,11 +211,8 @@ static     int ti_tscadc_probe(struct platform_device *pdev)
                err = PTR_ERR(clk);
                goto err_disable_clk;
        }
-       clock_rate = clk_get_rate(clk);
-       tscadc->clk_div = clock_rate / ADC_CLK;
 
-       /* TSCADC_CLKDIV needs to be configured to the value minus 1 */
-       tscadc->clk_div--;
+       tscadc->clk_div = (clk_get_rate(clk) / ADC_CLK) - 1;
        regmap_write(tscadc->regmap, REG_CLKDIV, tscadc->clk_div);
 
        /* Set the control register bits */