On 27/12/2016 11:04, Peng Fan wrote: > From: Ye Li <[email protected]> > > Implement the i2c clock enable and get function for mx7ulp. These > functions are required by imx_lpi2c driver. > > Signed-off-by: Peng Fan <[email protected]> > Signed-off-by: Ye Li <[email protected]> > Cc: Stefano Babic <[email protected]> > --- > > V2: > None > > arch/arm/cpu/armv7/mx7ulp/clock.c | 40 > ++++++++++++++++++++++++++++++++ > arch/arm/include/asm/arch-mx7ulp/clock.h | 4 ++++ > 2 files changed, 44 insertions(+) > > diff --git a/arch/arm/cpu/armv7/mx7ulp/clock.c > b/arch/arm/cpu/armv7/mx7ulp/clock.c > index 0c34d88..30db67d 100644 > --- a/arch/arm/cpu/armv7/mx7ulp/clock.c > +++ b/arch/arm/cpu/armv7/mx7ulp/clock.c > @@ -73,6 +73,46 @@ u32 get_lpuart_clk(void) > return pcc_clock_get_rate(lpuart_pcc_clks[index - 4]); > } > > +#ifdef CONFIG_SYS_LPI2C_IMX > +int enable_i2c_clk(unsigned char enable, unsigned i2c_num) > +{ > + /* Set parent to FIRC DIV2 clock */ > + const enum pcc_clk lpi2c_pcc_clks[] = { > + PER_CLK_LPI2C4, > + PER_CLK_LPI2C5, > + PER_CLK_LPI2C6, > + PER_CLK_LPI2C7, > + }; > + > + if (i2c_num < 4 || i2c_num > 7) > + return -EINVAL; > + > + if (enable) { > + pcc_clock_enable(lpi2c_pcc_clks[i2c_num - 4], false); > + pcc_clock_sel(lpi2c_pcc_clks[i2c_num - 4], SCG_FIRC_DIV2_CLK); > + pcc_clock_enable(lpi2c_pcc_clks[i2c_num - 4], true); > + } else { > + pcc_clock_enable(lpi2c_pcc_clks[i2c_num - 4], false); > + } > + return 0; > +} > + > +u32 imx_get_i2cclk(unsigned i2c_num) > +{ > + const enum pcc_clk lpi2c_pcc_clks[] = { > + PER_CLK_LPI2C4, > + PER_CLK_LPI2C5, > + PER_CLK_LPI2C6, > + PER_CLK_LPI2C7, > + }; > + > + if (i2c_num < 4 || i2c_num > 7) > + return 0; > + > + return pcc_clock_get_rate(lpi2c_pcc_clks[i2c_num - 4]); > +} > +#endif > + > unsigned int mxc_get_clock(enum mxc_clock clk) > { > switch (clk) { > diff --git a/arch/arm/include/asm/arch-mx7ulp/clock.h > b/arch/arm/include/asm/arch-mx7ulp/clock.h > index f21052e..ebf32c6 100644 > --- a/arch/arm/include/asm/arch-mx7ulp/clock.h > +++ b/arch/arm/include/asm/arch-mx7ulp/clock.h > @@ -27,6 +27,10 @@ enum mxc_clock { > > u32 mxc_get_clock(enum mxc_clock clk); > u32 get_lpuart_clk(void); > +#ifdef CONFIG_SYS_LPI2C_IMX > +int enable_i2c_clk(unsigned char enable, unsigned i2c_num); > +u32 imx_get_i2cclk(unsigned i2c_num); > +#endif > #ifdef CONFIG_MXC_OCOTP > void enable_ocotp_clk(unsigned char enable); > #endif >
Reviewed-by : Stefano Babic <[email protected]> Best regards, Stefano Babic -- ===================================================================== DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: [email protected] ===================================================================== _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
