On 27/12/2016 11:04, Peng Fan wrote:
From: Ye Li ye.li@nxp.com
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 Cc: Stefano Babic sbabic@denx.de
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 sbabic@denx.de
Best regards, Stefano Babic