diff options
| author | Ye Li <ye.li@nxp.com> | 2017-02-22 16:21:44 +0800 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2017-03-17 09:27:08 +0100 |
| commit | d4dcee2213c5f9379204f0c40a613e8557eae9ef (patch) | |
| tree | 6860b53a717d83f5054b541cfaf2cbf90965bdb3 | |
| parent | 1b409828b17605b2fdbe47b11d4ea1189f32f1e8 (diff) | |
imx: mx7ulp: Implement the clock functions for i2c driver
Implement the i2c clock enable and get function for mx7ulp. These
functions are required by imx_lpi2c driver.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Stefano Babic <sbabic@denx.de>
| -rw-r--r-- | arch/arm/cpu/armv7/mx7ulp/clock.c | 40 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-mx7ulp/clock.h | 4 |
2 files changed, 44 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/mx7ulp/clock.c b/arch/arm/cpu/armv7/mx7ulp/clock.c index e6225bb4fb..1c072b8198 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 f21052ef75..ebf32c6c2c 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 |