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Eugen Hristev authored
We can have the following scenario: 1) Boot the board with at91bootstrap that has CONFIG_SCLK enabled. It will configure the external slow oscillator. 2) Reset board, or power down, replug. Replace at91bootstrap with an at91bootstrap that has CONFIG_SCLK disabled. According to the at91boostrap help, this means use internal RC. Thus, at91boostrap will not touch this register (SLOW_CLOCK.SCKR) 3) Result is that the external slow clock crystal is still in use. Not touching SCKR , combined with battery-backed configuration means that the old config is still in effect. This fix solves that. CONFIG_SCLK is now part of a choice menu: either CONFIG_SCLK=y, or CONFIG_SCLK_INTRC=y. When booting with CONFIG_SCLK=n, it will call the function to go back to internal RC. When booting with CONFIG_SCLK=y it will enable the external slow clock. If the SoC has no slow clock whatsoever, there will be none of CONFIG_SCLK and CONFIG_SCLK_INTRC thus no code is ca...
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