diff options
| author | Nitin Garg <nitin.garg@freescale.com> | 2014-11-20 21:14:12 +0800 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2014-11-21 15:18:47 +0100 |
| commit | cf202d268b5d27b84a8c6df1d749ed3967451be4 (patch) | |
| tree | 1b3c9f2b5422fab050866916e27010cf6cd5fd03 /arch | |
| parent | 02a32a92d4a123c75292a284bdc605c376d204f7 (diff) | |
mx6: clock: Add thermal clock enable function
Add api to check and enable pll3 as required
for thermal sensor driver.
Signed-off-by: Ye.Li <B37916@freescale.com>
Signed-off-by: Nitin Garg <nitin.garg@freescale.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/cpu/armv7/mx6/clock.c | 30 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-mx6/clock.h | 1 |
2 files changed, 31 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c index 6c9c78c11a..80b11aaf50 100644 --- a/arch/arm/cpu/armv7/mx6/clock.c +++ b/arch/arm/cpu/armv7/mx6/clock.c @@ -673,6 +673,36 @@ void hab_caam_clock_enable(unsigned char enable) } #endif +static void enable_pll3(void) +{ + struct anatop_regs __iomem *anatop = + (struct anatop_regs __iomem *)ANATOP_BASE_ADDR; + + /* make sure pll3 is enabled */ + if ((readl(&anatop->usb1_pll_480_ctrl) & + BM_ANADIG_USB1_PLL_480_CTRL_LOCK) == 0) { + /* enable pll's power */ + writel(BM_ANADIG_USB1_PLL_480_CTRL_POWER, + &anatop->usb1_pll_480_ctrl_set); + writel(0x80, &anatop->ana_misc2_clr); + /* wait for pll lock */ + while ((readl(&anatop->usb1_pll_480_ctrl) & + BM_ANADIG_USB1_PLL_480_CTRL_LOCK) == 0) + ; + /* disable bypass */ + writel(BM_ANADIG_USB1_PLL_480_CTRL_BYPASS, + &anatop->usb1_pll_480_ctrl_clr); + /* enable pll output */ + writel(BM_ANADIG_USB1_PLL_480_CTRL_ENABLE, + &anatop->usb1_pll_480_ctrl_set); + } +} + +void enable_thermal_clk(void) +{ + enable_pll3(); +} + unsigned int mxc_get_clock(enum mxc_clock clk) { switch (clk) { diff --git a/arch/arm/include/asm/arch-mx6/clock.h b/arch/arm/include/asm/arch-mx6/clock.h index 3c58a0ab60..8e51f9b3a0 100644 --- a/arch/arm/include/asm/arch-mx6/clock.h +++ b/arch/arm/include/asm/arch-mx6/clock.h @@ -66,4 +66,5 @@ int enable_spi_clk(unsigned char enable, unsigned spi_num); void enable_ipu_clock(void); int enable_fec_anatop_clock(enum enet_freq freq); void enable_enet_clk(unsigned char enable); +void enable_thermal_clk(void); #endif /* __ASM_ARCH_CLOCK_H */ |