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arm:trats:pmic: Power consumption reduction state for Samsung's TRATS board

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When charging battery is necessary, the development board needs to
be turned into low power mode for better efficiency.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Minkyu Kang <mk7.kang@samsung.com>
This commit is contained in:
Łukasz Majewski 2012-11-13 03:22:10 +00:00 committed by Anatolij Gustschin
parent d955c6de84
commit 69ad72a10e
1 changed files with 58 additions and 0 deletions
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58
board/samsung/trats/trats.c
View file

@ -89,6 +89,64 @@ void i2c_init_board(void)
s5p_gpio_direction_output(&gpio2->y4, 1, 1);
}
static void trats_low_power_mode(void)
{
struct exynos4_clock *clk =
(struct exynos4_clock *)samsung_get_base_clock();
struct exynos4_power *pwr =
(struct exynos4_power *)samsung_get_base_power();
/* Power down CORE1 */
/* LOCAL_PWR_CFG [1:0] 0x3 EN, 0x0 DIS */
writel(0x0, &pwr->arm_core1_configuration);
/* Change the APLL frequency */
/* ENABLE (1 enable) | LOCKED (1 locked) */
/* [31] | [29] */
/* FSEL | MDIV | PDIV | SDIV */
/* [27] | [25:16] | [13:8] | [2:0] */
writel(0xa0c80604, &clk->apll_con0);
/* Change CPU0 clock divider */
/* CORE2_RATIO | APLL_RATIO | PCLK_DBG_RATIO | ATB_RATIO */
/* [30:28] | [26:24] | [22:20] | [18:16] */
/* PERIPH_RATIO | COREM1_RATIO | COREM0_RATIO | CORE_RATIO */
/* [14:12] | [10:8] | [6:4] | [2:0] */
writel(0x00000100, &clk->div_cpu0);
/* CLK_DIV_STAT_CPU0 - wait until clock gets stable (0 = stable) */
while (readl(&clk->div_stat_cpu0) & 0x1111111)
continue;
/* Change clock divider ratio for DMC */
/* DMCP_RATIO | DMCD_RATIO */
/* [22:20] | [18:16] */
/* DMC_RATIO | DPHY_RATIO | ACP_PCLK_RATIO | ACP_RATIO */
/* [14:12] | [10:8] | [6:4] | [2:0] */
writel(0x13113117, &clk->div_dmc0);
/* CLK_DIV_STAT_DMC0 - wait until clock gets stable (0 = stable) */
while (readl(&clk->div_stat_dmc0) & 0x11111111)
continue;
/* Turn off unnecessary power domains */
writel(0x0, &pwr->xxti_configuration); /* XXTI */
writel(0x0, &pwr->cam_configuration); /* CAM */
writel(0x0, &pwr->tv_configuration); /* TV */
writel(0x0, &pwr->mfc_configuration); /* MFC */
writel(0x0, &pwr->g3d_configuration); /* G3D */
writel(0x0, &pwr->gps_configuration); /* GPS */
writel(0x0, &pwr->gps_alive_configuration); /* GPS_ALIVE */
/* Turn off unnecessary clocks */
writel(0x0, &clk->gate_ip_cam); /* CAM */
writel(0x0, &clk->gate_ip_tv); /* TV */
writel(0x0, &clk->gate_ip_mfc); /* MFC */
writel(0x0, &clk->gate_ip_g3d); /* G3D */
writel(0x0, &clk->gate_ip_image); /* IMAGE */
writel(0x0, &clk->gate_ip_gps); /* GPS */
}
static int pmic_init_max8997(void)
{
struct pmic *p = pmic_get("MAX8997_PMIC");