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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>
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@ -73,6 +73,46 @@ u32 get_lpuart_clk(void)
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return pcc_clock_get_rate(lpuart_pcc_clks[index - 4]);
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return pcc_clock_get_rate(lpuart_pcc_clks[index - 4]);
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}
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}
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#ifdef CONFIG_SYS_LPI2C_IMX
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int enable_i2c_clk(unsigned char enable, unsigned i2c_num)
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{
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/* Set parent to FIRC DIV2 clock */
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const enum pcc_clk lpi2c_pcc_clks[] = {
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PER_CLK_LPI2C4,
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PER_CLK_LPI2C5,
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PER_CLK_LPI2C6,
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PER_CLK_LPI2C7,
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};
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if (i2c_num < 4 || i2c_num > 7)
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return -EINVAL;
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if (enable) {
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pcc_clock_enable(lpi2c_pcc_clks[i2c_num - 4], false);
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pcc_clock_sel(lpi2c_pcc_clks[i2c_num - 4], SCG_FIRC_DIV2_CLK);
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pcc_clock_enable(lpi2c_pcc_clks[i2c_num - 4], true);
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} else {
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pcc_clock_enable(lpi2c_pcc_clks[i2c_num - 4], false);
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}
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return 0;
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}
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u32 imx_get_i2cclk(unsigned i2c_num)
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{
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const enum pcc_clk lpi2c_pcc_clks[] = {
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PER_CLK_LPI2C4,
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PER_CLK_LPI2C5,
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PER_CLK_LPI2C6,
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PER_CLK_LPI2C7,
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};
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if (i2c_num < 4 || i2c_num > 7)
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return 0;
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return pcc_clock_get_rate(lpi2c_pcc_clks[i2c_num - 4]);
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}
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#endif
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unsigned int mxc_get_clock(enum mxc_clock clk)
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unsigned int mxc_get_clock(enum mxc_clock clk)
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{
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{
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switch (clk) {
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switch (clk) {
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@ -27,6 +27,10 @@ enum mxc_clock {
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u32 mxc_get_clock(enum mxc_clock clk);
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u32 mxc_get_clock(enum mxc_clock clk);
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u32 get_lpuart_clk(void);
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u32 get_lpuart_clk(void);
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#ifdef CONFIG_SYS_LPI2C_IMX
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int enable_i2c_clk(unsigned char enable, unsigned i2c_num);
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u32 imx_get_i2cclk(unsigned i2c_num);
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#endif
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#ifdef CONFIG_MXC_OCOTP
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#ifdef CONFIG_MXC_OCOTP
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void enable_ocotp_clk(unsigned char enable);
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void enable_ocotp_clk(unsigned char enable);
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#endif
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#endif
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