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power: supply: cpcap-battery: Simplify coulomb counter calculation with div_s64
We can simplify cpcap_battery_cc_raw_div() with div_s64. Cc: Merlijn Wajer <merlijn@wizzup.org> Signed-off-by: Tony Lindgren <tony@atomide.com> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
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@ -33,8 +33,6 @@
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#include <linux/iio/types.h>
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#include <linux/mfd/motorola-cpcap.h>
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#include <asm/div64.h>
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/*
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* Register bit defines for CPCAP_REG_BPEOL. Some of these seem to
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* map to MC13783UG.pdf "Table 5-19. Register 13, Power Control 0"
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@ -219,28 +217,17 @@ static int cpcap_battery_cc_raw_div(struct cpcap_battery_ddata *ddata,
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s16 offset, u32 divider)
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{
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s64 acc;
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u64 tmp;
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int avg_current;
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if (!divider)
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return 0;
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acc = accumulator;
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acc = acc - ((s64)sample * offset);
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acc -= (s64)sample * offset;
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acc *= ddata->cc_lsb;
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acc *= -1;
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acc = div_s64(acc, divider);
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if (acc >= 0)
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tmp = acc;
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else
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tmp = acc * -1;
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tmp = tmp * ddata->cc_lsb;
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do_div(tmp, divider);
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avg_current = tmp;
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if (acc >= 0)
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return -avg_current;
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else
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return avg_current;
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return acc;
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}
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/* 3600000μAms = 1μAh */
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